Unknown changes

.gitignore

@@ -18,3 +18,6 @@ xcuserdata/
 
 # Swift Package Manager local state
 .swiftpm/
+
+# Example data
+exampledata/

README.md

@@ -17,8 +17,6 @@ This thing is called "World Manager," and it happens to pertain to someone else'
 - Detect worlds, resource packs, behavior packs, and world templates.
 - Inspect package metadata, pack relationships, icons, versions, UUIDs, and basic world facts.
 - Export worlds and packs as portable `.mcworld`, `.mcpack`, `.mctemplate`, and `.mcaddon` packages, or share them via Messages, AirDrop, etc. via the "Share" sheet.
-- Import `.mcworld`, `.mcpack`, `.mctemplate`, and nested-package `.mcaddon` files into writable folder and connected-device sources.
-- Copy an item between sources by dragging it onto the destination source in the sidebar.
 - Preview and thumbnail supported Minecraft package files with Quick Look extensions.
 
 ## Usage
@@ -45,14 +43,6 @@ From an item's detail view, you can export it to a Minecraft package file on you
 
 If you share to another device with AirDrop, Messages, or a similar route, opening the received file on that device should launch Minecraft and begin Minecraft's normal import flow.
 
-### Importing and Copying
-
-Select a source and use `Import...` on its overview, or drop a supported Minecraft package onto the source row in the sidebar. World Manager inspects the package and places each item in the collection appropriate to its content type.
-
-You can also drag an existing world or pack from the item list onto another source. The app exports a temporary portable representation, validates it through the same import path, and installs it in the destination.
-
-Imports are additive. Existing worlds are never overwritten. A second world import receives a unique directory name. Packs with a UUID already present in the destination are rejected instead of being silently replaced.
-
 ## Requirements
 
 - macOS 26.2 or newer, based on the current Xcode project deployment target. Could work with older macOS. I don't have any so I don't know.
@@ -107,7 +97,7 @@ See [docs/ios-device-access.md](docs/ios-device-access.md) for the current devic
 
 ## Project Status
 
-This is pre-release software. Make sure Minecraft worlds and packs are being backed up by other means before using this app. Connected-device installation writes through private Apple MobileDevice interfaces and should be treated as best-effort. The initial implementation installs only into new directories and does not replace or remove existing content.
+This is pre-release software. Make sure Minecraft worlds and packs are being backed up by other means before using this app. The project is currently focused on read-only library access and export, and connected-device discovery, so it shouldn't be doing anything that can break your existing libraries.
 
 ## Trademarks
 

World Manager for Minecraft.xcodeproj/xcshareddata/xcschemes/MinecraftPackagePreviewExtension.xcscheme

@@ -74,7 +74,6 @@
       savedToolIdentifier = ""
       useCustomWorkingDirectory = "NO"
       debugDocumentVersioning = "YES"
-      askForAppToLaunch = "Yes"
       launchAutomaticallySubstyle = "2">
       <BuildableProductRunnable
          runnableDebuggingMode = "0">

World Manager for Minecraft.xcodeproj/xcshareddata/xcschemes/MinecraftPackageThumbnailExtension.xcscheme

@@ -73,7 +73,6 @@
       savedToolIdentifier = ""
       useCustomWorkingDirectory = "NO"
       debugDocumentVersioning = "YES"
-      askForAppToLaunch = "Yes"
       launchAutomaticallySubstyle = "2">
       <BuildableProductRunnable
          runnableDebuggingMode = "0">

World Manager for Minecraft/Models/Content/LibraryIndex.swift

@@ -152,7 +152,7 @@ nonisolated struct CollectionSnapshot: Identifiable, Hashable, Sendable, Codable
     let childDirectoryCount: Int
     let fingerprint: String
 
-    var id: String { folderName }
+    var id: String { "\(folderName)::\(fingerprint)" }
 }
 
 nonisolated struct SourceSnapshot: Hashable, Sendable, Codable {

World Manager for Minecraft/Models/Content/MinecraftContentItem.swift

@@ -3,6 +3,47 @@
 
 import Foundation
 
+typealias PlatformProviderID = String
+
+nonisolated enum MinecraftEdition: String, CaseIterable, Hashable, Sendable, Codable {
+    case bedrock
+    case java
+}
+
+nonisolated enum MinecraftContentKind: String, CaseIterable, Hashable, Sendable, Codable {
+    case world
+    case behaviorPack
+    case resourcePack
+    case dataPack
+    case skinPack
+    case worldTemplate
+    case shaderPack
+    case mod
+}
+
+nonisolated enum JavaContentType: String, CaseIterable, Hashable, Sendable, Codable {
+    case world = "Java World"
+    case resourcePack = "Java Resource Pack"
+    case dataPack = "Java Data Pack"
+    case shaderPack = "Java Shader Pack"
+    case mod = "Java Mod"
+
+    nonisolated var kind: MinecraftContentKind {
+        switch self {
+        case .world:
+            return .world
+        case .resourcePack:
+            return .resourcePack
+        case .dataPack:
+            return .dataPack
+        case .shaderPack:
+            return .shaderPack
+        case .mod:
+            return .mod
+        }
+    }
+}
+
 nonisolated enum MinecraftContentType: String, CaseIterable, Hashable, Sendable, Codable {
     case world = "World"
     case behaviorPack = "Behavior Pack"
@@ -25,6 +66,21 @@ nonisolated enum MinecraftContentType: String, CaseIterable, Hashable, Sendable,
         }
     }
 
+    nonisolated var kind: MinecraftContentKind {
+        switch self {
+        case .world:
+            return .world
+        case .behaviorPack:
+            return .behaviorPack
+        case .resourcePack:
+            return .resourcePack
+        case .skinPack:
+            return .skinPack
+        case .worldTemplate:
+            return .worldTemplate
+        }
+    }
+
     nonisolated var archiveExtension: String {
         switch self {
         case .world:
@@ -52,6 +108,71 @@ nonisolated enum MinecraftContentType: String, CaseIterable, Hashable, Sendable,
     }
 }
 
+nonisolated enum MinecraftPlatformContentType: Hashable, Sendable, Codable {
+    case bedrock(MinecraftContentType)
+    case java(JavaContentType)
+
+    nonisolated var edition: MinecraftEdition {
+        switch self {
+        case .bedrock:
+            return .bedrock
+        case .java:
+            return .java
+        }
+    }
+
+    nonisolated var kind: MinecraftContentKind {
+        switch self {
+        case .bedrock(let contentType):
+            return contentType.kind
+        case .java(let contentType):
+            return contentType.kind
+        }
+    }
+
+    nonisolated var displayName: String {
+        switch self {
+        case .bedrock(let contentType):
+            return contentType.rawValue
+        case .java(let contentType):
+            return contentType.rawValue
+        }
+    }
+}
+
+nonisolated struct ContentItemCapabilities: Hashable, Sendable, Codable {
+    var canRevealNativeContent: Bool
+    var canExportPortablePackage: Bool
+    var canShare: Bool
+    var portablePackageExtension: String?
+
+    nonisolated static func bedrock(contentType: MinecraftContentType) -> ContentItemCapabilities {
+        ContentItemCapabilities(
+            canRevealNativeContent: true,
+            canExportPortablePackage: true,
+            canShare: true,
+            portablePackageExtension: contentType.archiveExtension
+        )
+    }
+
+    nonisolated static func java(contentType: JavaContentType) -> ContentItemCapabilities {
+        let extensionName: String?
+        switch contentType {
+        case .world, .resourcePack, .dataPack, .shaderPack:
+            extensionName = "zip"
+        case .mod:
+            extensionName = "jar"
+        }
+
+        return ContentItemCapabilities(
+            canRevealNativeContent: true,
+            canExportPortablePackage: true,
+            canShare: true,
+            portablePackageExtension: extensionName
+        )
+    }
+}
+
 nonisolated enum PackSource: String, Hashable, Sendable, Codable {
     case referencedByWorld
     case embeddedInWorld
@@ -113,11 +234,119 @@ nonisolated struct PackMetadataDetails: Hashable, Sendable, Codable {
     var minimumEngineVersion: String?
 }
 
+nonisolated enum PlatformContentMetadata: Hashable, Sendable, Codable {
+    case bedrock(BedrockContentMetadata)
+    case java(JavaContentMetadata)
+    case none
+}
+
+nonisolated struct BedrockContentMetadata: Hashable, Sendable, Codable {
+    var world: WorldMetadata?
+    var packUUID: String?
+    var packVersion: String?
+    var packDetails: PackMetadataDetails?
+    var packReferences: [ContentPackReference]
+
+    nonisolated init(
+        world: WorldMetadata? = nil,
+        packUUID: String? = nil,
+        packVersion: String? = nil,
+        packDetails: PackMetadataDetails? = nil,
+        packReferences: [ContentPackReference] = []
+    ) {
+        self.world = world
+        self.packUUID = packUUID?.lowercased()
+        self.packVersion = packVersion
+        self.packDetails = packDetails
+        self.packReferences = packReferences
+    }
+}
+
+nonisolated struct JavaContentMetadata: Hashable, Sendable, Codable {
+    var world: JavaWorldMetadata?
+    var pack: JavaPackMetadata?
+    var mod: JavaModMetadata?
+    var dataPacks: [JavaPackReference]
+
+    nonisolated init(
+        world: JavaWorldMetadata? = nil,
+        pack: JavaPackMetadata? = nil,
+        mod: JavaModMetadata? = nil,
+        dataPacks: [JavaPackReference] = []
+    ) {
+        self.world = world
+        self.pack = pack
+        self.mod = mod
+        self.dataPacks = dataPacks
+    }
+}
+
+nonisolated struct JavaWorldMetadata: Hashable, Sendable, Codable {
+    var dataVersion: String?
+    var gameMode: String?
+    var difficulty: String?
+    var seed: String?
+    var lastPlayedDate: Date?
+}
+
+nonisolated struct JavaPackMetadata: Hashable, Sendable, Codable {
+    var packFormat: Int?
+    var supportedFormats: String?
+    var description: String?
+
+    nonisolated init(
+        packFormat: Int? = nil,
+        supportedFormats: String? = nil,
+        description: String? = nil
+    ) {
+        self.packFormat = packFormat
+        self.supportedFormats = supportedFormats
+        self.description = description
+    }
+}
+
+nonisolated struct JavaModMetadata: Hashable, Sendable, Codable {
+    var modID: String?
+    var version: String?
+    var description: String?
+    var authors: [String]
+    var license: String?
+    var environment: String?
+    var minecraftVersionRequirement: String?
+
+    nonisolated init(
+        modID: String? = nil,
+        version: String? = nil,
+        description: String? = nil,
+        authors: [String] = [],
+        license: String? = nil,
+        environment: String? = nil,
+        minecraftVersionRequirement: String? = nil
+    ) {
+        self.modID = modID
+        self.version = version
+        self.description = description
+        self.authors = authors
+        self.license = license
+        self.environment = environment
+        self.minecraftVersionRequirement = minecraftVersionRequirement
+    }
+}
+
+nonisolated struct JavaPackReference: Identifiable, Hashable, Sendable, Codable {
+    let id: String
+    var name: String
+    var pathHint: String?
+}
+
 nonisolated struct MinecraftContentItem: Identifiable, Hashable, Sendable, Codable {
     let id: URL
     let folderURL: URL
     let folderName: String
     let contentType: MinecraftContentType
+    let sourceEdition: MinecraftEdition
+    let contentKind: MinecraftContentKind
+    let platformType: MinecraftPlatformContentType
     let collectionRootURL: URL
     var displayName: String
     var iconURL: URL?
@@ -125,11 +354,23 @@ nonisolated struct MinecraftContentItem: Identifiable, Hashable, Sendable, Codab
     var lastPlayedDate: Date?
     var modifiedDate: Date?
     var sizeBytes: Int64?
-    var packUUID: String?
-    var packVersion: String?
-    var packMetadataDetails: PackMetadataDetails?
-    var packReferences: [ContentPackReference]
-    var worldMetadata: WorldMetadata?
+    var capabilities: ContentItemCapabilities
+    var platformMetadata: PlatformContentMetadata
+    var packUUID: String? {
+        didSet { syncBedrockMetadataFromCompatibilityFields() }
+    }
+    var packVersion: String? {
+        didSet { syncBedrockMetadataFromCompatibilityFields() }
+    }
+    var packMetadataDetails: PackMetadataDetails? {
+        didSet { syncBedrockMetadataFromCompatibilityFields() }
+    }
+    var packReferences: [ContentPackReference] {
+        didSet { syncBedrockMetadataFromCompatibilityFields() }
+    }
+    var worldMetadata: WorldMetadata? {
+        didSet { syncBedrockMetadataFromCompatibilityFields() }
+    }
     var metadataLoaded: Bool
     var previewLoaded: Bool
     var sizeLoaded: Bool
@@ -138,6 +379,9 @@ nonisolated struct MinecraftContentItem: Identifiable, Hashable, Sendable, Codab
         folderURL: URL,
         folderName: String,
         contentType: MinecraftContentType,
+        sourceEdition: MinecraftEdition? = nil,
+        contentKind: MinecraftContentKind? = nil,
+        platformType: MinecraftPlatformContentType? = nil,
         collectionRootURL: URL,
         displayName: String? = nil,
         iconURL: URL? = nil,
@@ -145,6 +389,8 @@ nonisolated struct MinecraftContentItem: Identifiable, Hashable, Sendable, Codab
         lastPlayedDate: Date? = nil,
         modifiedDate: Date? = nil,
         sizeBytes: Int64? = nil,
+        capabilities: ContentItemCapabilities? = nil,
+        platformMetadata: PlatformContentMetadata? = nil,
         packUUID: String? = nil,
         packVersion: String? = nil,
         packMetadataDetails: PackMetadataDetails? = nil,
@@ -158,6 +404,9 @@ nonisolated struct MinecraftContentItem: Identifiable, Hashable, Sendable, Codab
         self.folderURL = folderURL
         self.folderName = folderName
         self.contentType = contentType
+        self.sourceEdition = sourceEdition ?? .bedrock
+        self.contentKind = contentKind ?? contentType.kind
+        self.platformType = platformType ?? .bedrock(contentType)
         self.collectionRootURL = collectionRootURL
         self.displayName = displayName ?? folderName
         self.iconURL = iconURL
@@ -165,6 +414,16 @@ nonisolated struct MinecraftContentItem: Identifiable, Hashable, Sendable, Codab
         self.lastPlayedDate = lastPlayedDate
         self.modifiedDate = modifiedDate
         self.sizeBytes = sizeBytes
+        self.capabilities = capabilities ?? .bedrock(contentType: contentType)
+        self.platformMetadata = platformMetadata ?? .bedrock(
+            BedrockContentMetadata(
+                world: worldMetadata,
+                packUUID: packUUID,
+                packVersion: packVersion,
+                packDetails: packMetadataDetails,
+                packReferences: packReferences
+            )
+        )
         self.packUUID = packUUID?.lowercased()
         self.packVersion = packVersion
         self.packMetadataDetails = packMetadataDetails
@@ -175,6 +434,22 @@ nonisolated struct MinecraftContentItem: Identifiable, Hashable, Sendable, Codab
         self.sizeLoaded = sizeLoaded
     }
 
+    nonisolated mutating private func syncBedrockMetadataFromCompatibilityFields() {
+        guard sourceEdition == .bedrock else {
+            return
+        }
+
+        platformMetadata = .bedrock(
+            BedrockContentMetadata(
+                world: worldMetadata,
+                packUUID: packUUID,
+                packVersion: packVersion,
+                packDetails: packMetadataDetails,
+                packReferences: packReferences
+            )
+        )
+    }
+
     nonisolated var folderID: String {
         folderName
     }
@@ -201,6 +476,23 @@ nonisolated struct MinecraftContentItem: Identifiable, Hashable, Sendable, Codab
         values.append(packMetadataDetails?.minimumEngineVersion ?? "")
         values.append(packReferences.map(\.name).joined(separator: " "))
         values.append(packReferences.compactMap(\.uuid).joined(separator: " "))
+        if case .java(let metadata) = platformMetadata {
+            values.append(metadata.world?.dataVersion ?? "")
+            values.append(metadata.world?.gameMode ?? "")
+            values.append(metadata.world?.difficulty ?? "")
+            values.append(metadata.world?.seed ?? "")
+            values.append(metadata.pack?.description ?? "")
+            values.append(metadata.pack?.packFormat.map(String.init) ?? "")
+            values.append(metadata.pack?.supportedFormats ?? "")
+            values.append(metadata.mod?.modID ?? "")
+            values.append(metadata.mod?.version ?? "")
+            values.append(metadata.mod?.description ?? "")
+            values.append(metadata.mod?.authors.joined(separator: " ") ?? "")
+            values.append(metadata.mod?.license ?? "")
+            values.append(metadata.mod?.environment ?? "")
+            values.append(metadata.mod?.minecraftVersionRequirement ?? "")
+            values.append(metadata.dataPacks.map(\.name).joined(separator: " "))
+        }
 
         return values
             .filter { !$0.isEmpty }

World Manager for Minecraft/Models/Sources/MinecraftSource.swift

@@ -6,14 +6,18 @@ import Foundation
 nonisolated struct MinecraftSource: Identifiable, Hashable, Sendable {
     let id: URL
     let folderURL: URL
+    var edition: MinecraftEdition
+    var providerID: PlatformProviderID
     var origin: MinecraftSourceOrigin
     var accessDescriptor: SourceAccessDescriptor
+    var accessStatus: SourceAccessStatus
     var availability: SourceAvailability
     var capabilities: SourceCapabilities
     var bookmarkData: Data?
     var displayName: String
     var displayItems: [MinecraftContentItem]
     var displayItemCountsByType: [MinecraftContentType: Int]
+    var displayItemCountsByKind: [MinecraftContentKind: Int]
     var rawItems: [MinecraftContentItem]
     var logicalPacks: [LogicalPack]
     var logicalWorlds: [LogicalWorld]
@@ -47,18 +51,22 @@ nonisolated struct MinecraftSource: Identifiable, Hashable, Sendable {
         let resolvedOrigin = origin ?? .localFolder(bookmarkData: bookmarkData)
         self.id = normalizedSourceURL(sourceID ?? normalizedFolderURL)
         self.folderURL = normalizedFolderURL
+        self.edition = resolvedOrigin.defaultEdition
+        self.providerID = resolvedOrigin.defaultAccessorIdentifier
         self.origin = resolvedOrigin
         self.accessDescriptor = accessDescriptor ?? SourceAccessDescriptor(
             accessorIdentifier: resolvedOrigin.defaultAccessorIdentifier,
             kind: resolvedOrigin.kind,
             refreshStrategy: resolvedOrigin.defaultRefreshStrategy
         )
+        self.accessStatus = resolvedOrigin.defaultAccessStatus(displayName: normalizedFolderURL.lastPathComponent)
         self.availability = availability
         self.capabilities = resolvedOrigin.defaultCapabilities
         self.bookmarkData = bookmarkData
         self.displayName = normalizedFolderURL.lastPathComponent
         self.displayItems = []
         self.displayItemCountsByType = [:]
+        self.displayItemCountsByKind = [:]
         self.rawItems = []
         self.logicalPacks = []
         self.logicalWorlds = []
@@ -107,6 +115,8 @@ nonisolated struct MinecraftSource: Identifiable, Hashable, Sendable {
         }
 
         switch selection {
+        case .sourceCandidate, .connectedDevice:
+            return []
         case .source(let sourceID), .allContent(let sourceID):
             guard sourceID == id else {
                 return []
@@ -117,6 +127,11 @@ nonisolated struct MinecraftSource: Identifiable, Hashable, Sendable {
                 return []
             }
             return items(for: contentType)
+        case .contentKind(let sourceID, let contentKind):
+            guard sourceID == id else {
+                return []
+            }
+            return displayItems.filter { $0.contentKind == contentKind }
         }
     }
 

World Manager for Minecraft/Models/Sources/SourceCapabilities.swift

@@ -7,19 +7,16 @@ nonisolated struct SourceCapabilities: Hashable, Sendable, Codable {
     var canScan: Bool = true
     var canMaterializeItems: Bool = true
     var canExportPortablePackages: Bool = true
-    var canInstallItems: Bool = false
 
     static let localFolder = SourceCapabilities(
         canScan: true,
         canMaterializeItems: true,
-        canExportPortablePackages: true,
-        canInstallItems: true
+        canExportPortablePackages: true
     )
 
     static let connectedDevice = SourceCapabilities(
         canScan: true,
         canMaterializeItems: true,
-        canExportPortablePackages: true,
-        canInstallItems: true
+        canExportPortablePackages: true
     )
 }

World Manager for Minecraft/Models/Sources/SourceOrigin.swift

@@ -45,20 +45,32 @@ nonisolated enum DeviceContainerAccessMode: String, Hashable, Sendable, Codable
 
 nonisolated enum MinecraftSourceOrigin: Hashable, Sendable, Codable {
     case localFolder(bookmarkData: Data?)
+    case javaLocalFolder(bookmarkData: Data?)
     case connectedDevice(device: ConnectedDevice, container: DeviceAppContainer)
 
     nonisolated var defaultAccessorIdentifier: SourceAccessorIdentifier {
         switch self {
         case .localFolder:
             return LocalFolderSourceAccess().accessorIdentifier
+        case .javaLocalFolder:
+            return JavaLocalFolderSourceAccess().accessorIdentifier
         case .connectedDevice:
             return AppleMobileDeviceSourceAccess().accessorIdentifier
         }
     }
 
+    nonisolated var defaultEdition: MinecraftEdition {
+        switch self {
+        case .localFolder, .connectedDevice:
+            return .bedrock
+        case .javaLocalFolder:
+            return .java
+        }
+    }
+
     nonisolated var kind: MinecraftSourceKind {
         switch self {
-        case .localFolder:
+        case .localFolder, .javaLocalFolder:
             return .localFolder
         case .connectedDevice:
             return .connectedDevice
@@ -67,7 +79,7 @@ nonisolated enum MinecraftSourceOrigin: Hashable, Sendable, Codable {
 
     nonisolated var defaultRefreshStrategy: SourceRefreshStrategy {
         switch self {
-        case .localFolder:
+        case .localFolder, .javaLocalFolder:
             return .eagerFullScan
         case .connectedDevice:
             return .staged
@@ -76,12 +88,35 @@ nonisolated enum MinecraftSourceOrigin: Hashable, Sendable, Codable {
 
     nonisolated var defaultCapabilities: SourceCapabilities {
         switch self {
-        case .localFolder:
+        case .localFolder, .javaLocalFolder:
             return .localFolder
         case .connectedDevice:
             return .connectedDevice
         }
     }
+
+    nonisolated func defaultAccessStatus(displayName: String) -> SourceAccessStatus {
+        switch self {
+        case .localFolder(let bookmarkData), .javaLocalFolder(let bookmarkData):
+            return SourceAccessStatus(
+                availability: .unknown,
+                mode: bookmarkData == nil ? .localFileSystem : .securityScopedLocalFolder,
+                displayName: displayName,
+                iconSystemName: "folder",
+                statusText: nil,
+                warningText: nil
+            )
+        case .connectedDevice(let device, _):
+            return SourceAccessStatus(
+                availability: .unknown,
+                mode: device.connection == .usb ? .usbDevice : .networkDevice,
+                displayName: displayName,
+                iconSystemName: "iphone.gen3",
+                statusText: nil,
+                warningText: nil
+            )
+        }
+    }
 }
 
 nonisolated enum MinecraftSourceKind: String, Hashable, Sendable, Codable {

World Manager for Minecraft/Models/Sources/SourceRecord.swift

@@ -24,6 +24,114 @@ nonisolated struct SourceAccessDescriptor: Hashable, Sendable, Codable {
     var refreshStrategy: SourceRefreshStrategy
 }
 
+nonisolated enum SourceAccessMode: String, Hashable, Sendable, Codable {
+    case localFileSystem
+    case securityScopedLocalFolder
+    case usbDevice
+    case networkDevice
+    case archive
+    case unknown
+}
+
+nonisolated struct SourceAccessStatus: Hashable, Sendable, Codable {
+    var availability: SourceAvailability
+    var mode: SourceAccessMode
+    var displayName: String
+    var iconSystemName: String
+    var statusText: String?
+    var warningText: String?
+}
+
+nonisolated enum SourceProbeConfidence: Int, Comparable, Hashable, Sendable, Codable {
+    case none = 0
+    case weak = 25
+    case medium = 50
+    case strong = 75
+    case exact = 100
+
+    static func < (lhs: SourceProbeConfidence, rhs: SourceProbeConfidence) -> Bool {
+        lhs.rawValue < rhs.rawValue
+    }
+}
+
+nonisolated struct SourceProbeResult: Hashable, Sendable {
+    let providerID: PlatformProviderID
+    let edition: MinecraftEdition
+    let confidence: SourceProbeConfidence
+    let sourceRootURL: URL
+    let displayName: String
+    let detectedKinds: Set<MinecraftContentKind>
+    let warnings: [String]
+}
+
+nonisolated struct SourceCandidate: Identifiable, Hashable, Sendable {
+    var providerID: PlatformProviderID
+    var edition: MinecraftEdition
+    var sourceRootURL: URL
+    var displayName: String
+    var confidence: SourceProbeConfidence
+    var reason: String
+    var detectedKinds: Set<MinecraftContentKind>
+
+    var id: String {
+        [
+            providerID,
+            sourceIdentityKey(for: sourceRootURL)
+        ].joined(separator: "::")
+    }
+}
+
+nonisolated func sourceIdentityKey(for url: URL) -> String {
+    if url.isFileURL {
+        return url.standardizedFileURL.resolvingSymlinksInPath().path.lowercased()
+    }
+
+    return url.standardized.absoluteString.lowercased()
+}
+
+nonisolated enum WorkStageState: String, Hashable, Sendable, Codable {
+    case pending
+    case running
+    case succeeded
+    case failed
+    case skipped
+    case cancelled
+}
+
+nonisolated enum WorkProgress: Hashable, Sendable, Codable {
+    case indeterminate
+    case fraction(Double)
+    case count(completed: Int, total: Int?)
+}
+
+nonisolated struct WorkStage: Identifiable, Hashable, Sendable, Codable {
+    let id: String
+    var title: String
+    var detail: String?
+    var state: WorkStageState
+    var progress: WorkProgress
+}
+
+nonisolated struct ProviderWarning: Identifiable, Hashable, Sendable, Codable {
+    let id: String
+    var message: String
+    var detail: String?
+}
+
+nonisolated enum ProviderEvent: Sendable {
+    case accessStatusChanged(SourceAccessStatus)
+    case stageUpdated(WorkStage)
+    case discovered(MinecraftContentItem)
+    case inspected(MinecraftContentItem)
+    case warning(ProviderWarning)
+}
+
+nonisolated enum SourceCandidateEvent: Sendable {
+    case stageUpdated(WorkStage)
+    case candidate(SourceCandidate)
+    case warning(ProviderWarning)
+}
+
 nonisolated struct SourceRecord: Identifiable, Hashable, Sendable, Codable {
     let id: URL
     var displayName: String

World Manager for Minecraft/Services/AppSupport/Export/ContentItemActionService.swift

@@ -16,7 +16,7 @@ struct ContentItemActionService: Sendable {
     }
 
     nonisolated func archiveContentType(for item: MinecraftContentItem) -> UTType {
-        UTType(filenameExtension: item.contentType.archiveExtension) ?? .data
+        UTType(filenameExtension: item.capabilities.portablePackageExtension ?? item.contentType.archiveExtension) ?? .data
     }
 
     nonisolated func persistExternalRepresentation(

World Manager for Minecraft/Services/AppSupport/Export/ContentPackageExporter.swift

@@ -37,7 +37,11 @@ enum ContentPackageExporter {
             try fileManager.removeItem(at: archiveURL)
         }
 
-        try await createArchive(for: item, source: source, at: archiveURL)
+        if isPortableFileItem(item) {
+            try copyPortableFileItem(item, to: archiveURL, fileManager: fileManager)
+        } else {
+            try await createArchive(for: item, source: source, at: archiveURL)
+        }
         return archiveURL
     }
 
@@ -46,7 +50,7 @@ enum ContentPackageExporter {
     }
 
     nonisolated static func suggestedFilename(for item: MinecraftContentItem) -> String {
-        "\(suggestedBaseFilename(for: item)).\(item.contentType.archiveExtension)"
+        "\(suggestedBaseFilename(for: item)).\(archiveExtension(for: item))"
     }
 
     nonisolated static func finalArchiveURL(for item: MinecraftContentItem, destinationURL: URL) -> URL {
@@ -209,7 +213,7 @@ enum ContentPackageExporter {
 
         return requestDirectoryURL
             .appendingPathComponent(suggestedBaseFilename(for: item))
-            .appendingPathExtension(item.contentType.archiveExtension)
+            .appendingPathExtension(archiveExtension(for: item))
     }
 
     nonisolated private static func shareCacheKey(for item: MinecraftContentItem) -> String {
@@ -271,7 +275,7 @@ enum ContentPackageExporter {
 
     nonisolated private static func normalizedArchiveURL(for item: MinecraftContentItem, destinationURL: URL) -> URL {
         let normalizedDestinationURL = destinationURL.standardizedFileURL
-        let requiredExtension = item.contentType.archiveExtension
+        let requiredExtension = archiveExtension(for: item)
 
         if normalizedDestinationURL.pathExtension.lowercased() == requiredExtension {
             return normalizedDestinationURL
@@ -280,6 +284,32 @@ enum ContentPackageExporter {
         return normalizedDestinationURL.appendingPathExtension(requiredExtension)
     }
 
+    nonisolated private static func archiveExtension(for item: MinecraftContentItem) -> String {
+        item.capabilities.portablePackageExtension ?? item.contentType.archiveExtension
+    }
+
+    nonisolated private static func isPortableFileItem(_ item: MinecraftContentItem) -> Bool {
+        guard item.sourceEdition == .java else {
+            return false
+        }
+
+        guard let expectedExtension = item.capabilities.portablePackageExtension else {
+            return false
+        }
+
+        let values = try? item.folderURL.resourceValues(forKeys: [.isRegularFileKey])
+        return values?.isRegularFile == true
+            && item.folderURL.pathExtension.localizedCaseInsensitiveCompare(expectedExtension) == .orderedSame
+    }
+
+    nonisolated private static func copyPortableFileItem(
+        _ item: MinecraftContentItem,
+        to destinationURL: URL,
+        fileManager: FileManager
+    ) throws {
+        try fileManager.copyItem(at: item.folderURL, to: destinationURL)
+    }
+
     nonisolated private static func uniqueArchiveURL(
         in directoryURL: URL,
         baseName: String,

World Manager for Minecraft/Services/AppSupport/Import/MinecraftPackageInstaller.swift

@@ -1,361 +0,0 @@
-// SPDX-FileCopyrightText: 2026 John Burwell and contributors
-// SPDX-License-Identifier: AGPL-3.0-or-later
-
-import Foundation
-
-nonisolated struct InstallationPayload: Sendable {
-    let contentType: MinecraftContentType
-    let preparedDirectoryURL: URL
-    let displayName: String
-    let packUUID: String?
-    let packVersion: String?
-    let suggestedFolderName: String
-}
-
-nonisolated struct InstallationPlan: Sendable {
-    let payloads: [InstallationPayload]
-    let stagingRootURL: URL
-
-    func cleanup(fileManager: FileManager = .default) {
-        try? fileManager.removeItem(at: stagingRootURL)
-    }
-}
-
-nonisolated struct InstalledContentItem: Sendable {
-    let contentType: MinecraftContentType
-    let displayName: String
-    let destinationName: String
-}
-
-nonisolated struct SourceInstallationState: Hashable, Sendable {
-    let completedCount: Int
-    let totalCount: Int
-    let status: String
-}
-
-enum MinecraftPackageInstaller {
-    enum InstallError: LocalizedError {
-        case emptyPackage
-        case unsupportedAddonLayout
-        case archiveTooLarge
-        case tooManyEntries
-        case symbolicLinksNotSupported
-        case invalidPreparedContent
-        case duplicatePack(name: String, version: String?)
-        case duplicateArchivePath(String)
-        case partialInstallation(completed: Int, total: Int, reason: String)
-
-        var errorDescription: String? {
-            switch self {
-            case .emptyPackage:
-                return "The Minecraft package does not contain any files."
-            case .unsupportedAddonLayout:
-                return "The .mcaddon package does not contain any supported Minecraft package files."
-            case .archiveTooLarge:
-                return "The expanded Minecraft package is too large to import safely."
-            case .tooManyEntries:
-                return "The Minecraft package contains too many files to import safely."
-            case .symbolicLinksNotSupported:
-                return "Minecraft packages containing symbolic links are not supported."
-            case .invalidPreparedContent:
-                return "The prepared content does not contain a valid Minecraft world, pack, or template."
-            case .duplicatePack(let name, let version):
-                if let version, !version.isEmpty {
-                    return "\(name) version \(version) is already installed in this source."
-                }
-                return "\(name) is already installed in this source."
-            case .duplicateArchivePath(let path):
-                return "The Minecraft package contains more than one entry for \(path)."
-            case .partialInstallation(let completed, let total, let reason):
-                return "Installed \(completed) of \(total) items before the import stopped: \(reason)"
-            }
-        }
-    }
-
-    private static let maximumEntryCount = 100_000
-    private static let maximumExpandedSize: UInt64 = 16 * 1_024 * 1_024 * 1_024
-
-    nonisolated static func preparePackage(at packageURL: URL) throws -> InstallationPlan {
-        let fileManager = FileManager.default
-        let stagingRootURL = fileManager.temporaryDirectory
-            .appendingPathComponent("MinecraftPackageInstallation", isDirectory: true)
-            .appendingPathComponent(UUID().uuidString, isDirectory: true)
-        try fileManager.createDirectory(at: stagingRootURL, withIntermediateDirectories: true)
-
-        do {
-            let payloads = try preparePackage(
-                at: packageURL.standardizedFileURL,
-                inside: stagingRootURL,
-                fileManager: fileManager
-            )
-            guard !payloads.isEmpty else {
-                throw InstallError.emptyPackage
-            }
-            return InstallationPlan(payloads: payloads, stagingRootURL: stagingRootURL)
-        } catch {
-            try? fileManager.removeItem(at: stagingRootURL)
-            throw error
-        }
-    }
-
-    nonisolated static func prepareDirectory(
-        at directoryURL: URL,
-        contentType: MinecraftContentType
-    ) throws -> InstallationPlan {
-        let fileManager = FileManager.default
-        let stagingRootURL = fileManager.temporaryDirectory
-            .appendingPathComponent("MinecraftDirectoryInstallation", isDirectory: true)
-            .appendingPathComponent(UUID().uuidString, isDirectory: true)
-        let payloadDirectoryURL = stagingRootURL.appendingPathComponent("payload", isDirectory: true)
-
-        do {
-            try validateDirectoryTree(at: directoryURL, fileManager: fileManager)
-            try fileManager.createDirectory(at: stagingRootURL, withIntermediateDirectories: true)
-            try fileManager.copyItem(at: directoryURL, to: payloadDirectoryURL)
-            let payload = try makePayload(
-                contentRootURL: payloadDirectoryURL,
-                contentType: contentType,
-                fallbackName: directoryURL.lastPathComponent,
-                fileManager: fileManager
-            )
-            return InstallationPlan(payloads: [payload], stagingRootURL: stagingRootURL)
-        } catch {
-            try? fileManager.removeItem(at: stagingRootURL)
-            throw error
-        }
-    }
-
-    private nonisolated static func preparePackage(
-        at packageURL: URL,
-        inside stagingRootURL: URL,
-        fileManager: FileManager
-    ) throws -> [InstallationPayload] {
-        let pathExtension = packageURL.pathExtension.lowercased()
-        guard MinecraftPackageInspector.supportedPathExtensions.contains(pathExtension) else {
-            throw MinecraftPackageInspector.InspectionError.unsupportedFileType(pathExtension)
-        }
-
-        let archive = try ZipArchiveReader(url: packageURL)
-        try validate(entries: archive.entries)
-
-        if pathExtension == "mcaddon" {
-            return try prepareAddon(
-                archive: archive,
-                packageURL: packageURL,
-                stagingRootURL: stagingRootURL,
-                fileManager: fileManager
-            )
-        }
-
-        let contentRootPath = try MinecraftPackageInspector.resolvedContentRootPath(
-            in: archive.entries,
-            archivePathExtension: pathExtension
-        )
-        let payloadDirectoryURL = stagingRootURL
-            .appendingPathComponent("payload-\(UUID().uuidString)", isDirectory: true)
-        try extract(
-            archive: archive,
-            contentRootPath: contentRootPath,
-            to: payloadDirectoryURL,
-            fileManager: fileManager
-        )
-
-        let contentType: MinecraftContentType
-        switch pathExtension {
-        case "mcworld":
-            contentType = .world
-        case "mctemplate":
-            contentType = .worldTemplate
-        case "mcpack":
-            contentType = MinecraftContentMetadataReader.inferredPackContentType(
-                for: payloadDirectoryURL,
-                fileManager: fileManager
-            )
-        default:
-            throw MinecraftPackageInspector.InspectionError.unsupportedFileType(pathExtension)
-        }
-
-        return [
-            try makePayload(
-                contentRootURL: payloadDirectoryURL,
-                contentType: contentType,
-                fallbackName: packageURL.deletingPathExtension().lastPathComponent,
-                fileManager: fileManager
-            )
-        ]
-    }
-
-    private nonisolated static func prepareAddon(
-        archive: ZipArchiveReader,
-        packageURL: URL,
-        stagingRootURL: URL,
-        fileManager: FileManager
-    ) throws -> [InstallationPayload] {
-        let nestedEntries = archive.entries.filter { entry in
-            guard !entry.isDirectory else {
-                return false
-            }
-            return ["mcpack", "mcworld", "mctemplate"].contains(
-                URL(fileURLWithPath: entry.path).pathExtension.lowercased()
-            )
-        }
-
-        guard !nestedEntries.isEmpty else {
-            throw InstallError.unsupportedAddonLayout
-        }
-
-        var payloads: [InstallationPayload] = []
-        for nestedEntry in nestedEntries {
-            let nestedPackageURL = stagingRootURL
-                .appendingPathComponent("nested-\(UUID().uuidString)")
-                .appendingPathExtension(URL(fileURLWithPath: nestedEntry.path).pathExtension)
-            try archive.extract(nestedEntry).write(to: nestedPackageURL, options: .atomic)
-            payloads.append(
-                contentsOf: try preparePackage(
-                    at: nestedPackageURL,
-                    inside: stagingRootURL,
-                    fileManager: fileManager
-                )
-            )
-            try? fileManager.removeItem(at: nestedPackageURL)
-        }
-
-        _ = packageURL
-        return payloads
-    }
-
-    private nonisolated static func validate(entries: [ZipArchiveEntry]) throws {
-        guard !entries.isEmpty else {
-            throw InstallError.emptyPackage
-        }
-        guard entries.count <= maximumEntryCount else {
-            throw InstallError.tooManyEntries
-        }
-        guard !entries.contains(where: \.isSymbolicLink) else {
-            throw InstallError.symbolicLinksNotSupported
-        }
-        var paths = Set<String>()
-        for entry in entries where !entry.isDirectory {
-            guard paths.insert(entry.path).inserted else {
-                throw InstallError.duplicateArchivePath(entry.path)
-            }
-        }
-
-        let expandedSize = entries.reduce(UInt64(0)) { partial, entry in
-            partial + UInt64(entry.uncompressedSize)
-        }
-        guard expandedSize <= maximumExpandedSize else {
-            throw InstallError.archiveTooLarge
-        }
-    }
-
-    private nonisolated static func extract(
-        archive: ZipArchiveReader,
-        contentRootPath: String,
-        to destinationRootURL: URL,
-        fileManager: FileManager
-    ) throws {
-        try fileManager.createDirectory(at: destinationRootURL, withIntermediateDirectories: true)
-        let prefix = contentRootPath.isEmpty ? "" : contentRootPath + "/"
-
-        for entry in archive.entries {
-            guard entry.path.hasPrefix(prefix) else {
-                continue
-            }
-            let relativePath = String(entry.path.dropFirst(prefix.count))
-            guard !relativePath.isEmpty else {
-                continue
-            }
-
-            let destinationURL = destinationRootURL.appendingPathComponent(relativePath)
-            if entry.isDirectory {
-                try fileManager.createDirectory(at: destinationURL, withIntermediateDirectories: true)
-                continue
-            }
-
-            try fileManager.createDirectory(
-                at: destinationURL.deletingLastPathComponent(),
-                withIntermediateDirectories: true
-            )
-            try archive.extract(entry).write(to: destinationURL, options: .atomic)
-        }
-    }
-
-    private nonisolated static func makePayload(
-        contentRootURL: URL,
-        contentType: MinecraftContentType,
-        fallbackName: String,
-        fileManager: FileManager
-    ) throws -> InstallationPayload {
-        guard isValidContent(at: contentRootURL, type: contentType, fileManager: fileManager) else {
-            throw InstallError.invalidPreparedContent
-        }
-
-        let manifest = MinecraftContentMetadataReader.manifestMetadata(
-            in: contentRootURL,
-            fileManager: fileManager
-        )
-        let displayName = MinecraftContentMetadataReader.displayName(
-            for: contentRootURL,
-            contentType: contentType,
-            fallbackName: fallbackName,
-            fileManager: fileManager
-        )
-        let preferredFolderName = manifest?.uuid ?? fallbackName
-
-        return InstallationPayload(
-            contentType: contentType,
-            preparedDirectoryURL: contentRootURL,
-            displayName: displayName,
-            packUUID: manifest?.uuid,
-            packVersion: manifest?.version,
-            suggestedFolderName: sanitizedFolderName(preferredFolderName)
-        )
-    }
-
-    private nonisolated static func isValidContent(
-        at directoryURL: URL,
-        type: MinecraftContentType,
-        fileManager: FileManager
-    ) -> Bool {
-        switch type {
-        case .world:
-            return fileManager.fileExists(atPath: directoryURL.appendingPathComponent("level.dat").path)
-                || fileManager.fileExists(atPath: directoryURL.appendingPathComponent("db", isDirectory: true).path)
-        case .behaviorPack, .resourcePack, .skinPack, .worldTemplate:
-            return fileManager.fileExists(atPath: directoryURL.appendingPathComponent("manifest.json").path)
-        }
-    }
-
-    private nonisolated static func sanitizedFolderName(_ value: String) -> String {
-        let invalidCharacters = CharacterSet(charactersIn: "/:\\?%*|\"<>")
-        let components = value.components(separatedBy: invalidCharacters)
-        let sanitized = components.joined(separator: "-")
-            .trimmingCharacters(in: .whitespacesAndNewlines)
-        return sanitized.isEmpty ? UUID().uuidString : String(sanitized.prefix(80))
-    }
-
-    private nonisolated static func validateDirectoryTree(
-        at directoryURL: URL,
-        fileManager: FileManager
-    ) throws {
-        guard let enumerator = fileManager.enumerator(
-            at: directoryURL,
-            includingPropertiesForKeys: [.isSymbolicLinkKey],
-            options: []
-        ) else {
-            throw InstallError.invalidPreparedContent
-        }
-
-        var entryCount = 0
-        for case let entryURL as URL in enumerator {
-            entryCount += 1
-            guard entryCount <= maximumEntryCount else {
-                throw InstallError.tooManyEntries
-            }
-            if (try entryURL.resourceValues(forKeys: [.isSymbolicLinkKey]).isSymbolicLink) == true {
-                throw InstallError.symbolicLinksNotSupported
-            }
-        }
-    }
-}

World Manager for Minecraft/Services/AppSupport/Scanning/ContentItemFileFacts.swift

@@ -25,14 +25,32 @@ struct ContentItemFileFacts: Sendable {
             self.approximateAgeText = nil
         }
 
-        switch item.contentType {
-        case .world:
-            let levelDBURL = item.folderURL.appendingPathComponent("db", isDirectory: true)
-            self.storageFormatLabel = fileManager.fileExists(atPath: levelDBURL.path)
-                ? "LevelDB world storage"
-                : "Flat-file world storage"
-        case .behaviorPack, .resourcePack, .skinPack, .worldTemplate:
-            self.storageFormatLabel = "Manifest-based package"
+        switch item.sourceEdition {
+        case .bedrock:
+            switch item.contentType {
+            case .world:
+                let levelDBURL = item.folderURL.appendingPathComponent("db", isDirectory: true)
+                self.storageFormatLabel = fileManager.fileExists(atPath: levelDBURL.path)
+                    ? "LevelDB world storage"
+                    : "Flat-file world storage"
+            case .behaviorPack, .resourcePack, .skinPack, .worldTemplate:
+                self.storageFormatLabel = "Manifest-based package"
+            }
+        case .java:
+            switch item.contentKind {
+            case .world:
+                self.storageFormatLabel = "Anvil world storage"
+            case .mod:
+                self.storageFormatLabel = "Java mod archive"
+            case .shaderPack:
+                self.storageFormatLabel = "Shader pack archive"
+            case .resourcePack:
+                self.storageFormatLabel = "Resource pack archive"
+            case .dataPack:
+                self.storageFormatLabel = "Data pack archive"
+            case .behaviorPack, .skinPack, .worldTemplate:
+                self.storageFormatLabel = "Java content"
+            }
         }
     }
 }

World Manager for Minecraft/Services/AppSupport/Scanning/WorldScanner.swift

@@ -3,7 +3,9 @@
 
 import Foundation
 
-enum WorldScanner {
+typealias WorldScanner = BedrockContentScanner
+
+enum BedrockContentScanner {
     nonisolated static func loadSize(for item: MinecraftContentItem) -> MinecraftContentItem {
         let fileManager = FileManager.default
         var sizedItem = item
@@ -20,6 +22,49 @@ enum WorldScanner {
         await packReferenceIndexStore.reset(for: sourceRootURL)
     }
 
+    nonisolated static func probeLocalFolder(_ url: URL, providerID: PlatformProviderID) -> SourceProbeResult? {
+        let fileManager = FileManager.default
+        let normalizedURL = url.standardizedFileURL
+        var detectedKinds = Set<MinecraftContentKind>()
+        var score = 0
+
+        let collectionKinds: [(String, MinecraftContentKind)] = [
+            ("minecraftWorlds", .world),
+            ("behavior_packs", .behaviorPack),
+            ("resource_packs", .resourcePack),
+            ("skin_packs", .skinPack),
+            ("world_templates", .worldTemplate)
+        ]
+
+        for (folderName, kind) in collectionKinds {
+            if fileManager.fileExists(atPath: normalizedURL.appendingPathComponent(folderName, isDirectory: true).path) {
+                detectedKinds.insert(kind)
+                score += 25
+            }
+        }
+
+        if fileManager.fileExists(atPath: normalizedURL.appendingPathComponent("db", isDirectory: true).path)
+            || fileManager.fileExists(atPath: normalizedURL.appendingPathComponent("levelname.txt").path) {
+            detectedKinds.insert(.world)
+            score += 35
+        }
+
+        guard score > 0 else {
+            return nil
+        }
+
+        let confidence: SourceProbeConfidence = score >= 50 ? .strong : .medium
+        return SourceProbeResult(
+            providerID: providerID,
+            edition: .bedrock,
+            confidence: confidence,
+            sourceRootURL: normalizedURL,
+            displayName: normalizedURL.lastPathComponent,
+            detectedKinds: detectedKinds,
+            warnings: []
+        )
+    }
+
     nonisolated static func discoverItems(
         in searchRootURL: URL,
         onDiscovered: @Sendable (MinecraftContentItem) -> Void = { _ in }
@@ -162,7 +207,7 @@ enum WorldScanner {
             ? MinecraftContentMetadataReader.worldMetadata(in: item.folderURL, fileManager: fileManager)
             : nil
         enrichedItem.lastPlayedDate = lastPlayedDate(for: item, fileManager: fileManager, worldMetadata: enrichedItem.worldMetadata)
-        enrichedItem.modifiedDate = modifiedDate(for: item.folderURL)
+        enrichedItem.modifiedDate = WorldScanner.modifiedDate(for: item.folderURL)
         if let manifestMetadata = MinecraftContentMetadataReader.manifestMetadata(in: item.folderURL, fileManager: fileManager) {
             enrichedItem.packUUID = manifestMetadata.uuid
             enrichedItem.packVersion = manifestMetadata.version
@@ -322,11 +367,11 @@ enum WorldScanner {
         return worldMetadata?.lastPlayedDate
     }
 
-    nonisolated private static func modifiedDate(for directoryURL: URL) -> Date? {
+    nonisolated fileprivate static func modifiedDate(for directoryURL: URL) -> Date? {
         try? directoryURL.resourceValues(forKeys: [.contentModificationDateKey]).contentModificationDate
     }
 
-    nonisolated private static func folderSize(at folderURL: URL, fileManager: FileManager) -> Int64? {
+    nonisolated fileprivate static func folderSize(at folderURL: URL, fileManager: FileManager) -> Int64? {
         guard let enumerator = fileManager.enumerator(
             at: folderURL,
             includingPropertiesForKeys: [.isRegularFileKey, .fileSizeKey],
@@ -580,4 +625,596 @@ private actor PackReferenceIndexStore {
     }
 }
 
+enum JavaContentScanner {
+    nonisolated static func probeLocalFolder(_ url: URL, providerID: PlatformProviderID) -> SourceProbeResult? {
+        let fileManager = FileManager.default
+        let candidates = localFolderProbeCandidates(for: url.standardizedFileURL, fileManager: fileManager)
+        let scoredCandidates = candidates.compactMap { candidate -> (url: URL, score: Int, kinds: Set<MinecraftContentKind>)? in
+            let score = javaProbeScore(for: candidate, fileManager: fileManager)
+            guard score.value > 0 else {
+                return nil
+            }
+
+            return (candidate, score.value, score.kinds)
+        }
+
+        guard let best = scoredCandidates.max(by: { lhs, rhs in
+            if lhs.score != rhs.score {
+                return lhs.score < rhs.score
+            }
+
+            return lhs.url.path.count > rhs.url.path.count
+        }) else {
+            return nil
+        }
+
+        let confidence: SourceProbeConfidence
+        if best.score >= 70 {
+            confidence = .exact
+        } else if best.score >= 45 {
+            confidence = .strong
+        } else {
+            confidence = .medium
+        }
+
+        let warnings = best.url.standardizedFileURL == url.standardizedFileURL ? [] : [
+            "Using nested Java instance folder: \(best.url.lastPathComponent)"
+        ]
+
+        return SourceProbeResult(
+            providerID: providerID,
+            edition: .java,
+            confidence: confidence,
+            sourceRootURL: best.url.standardizedFileURL,
+            displayName: best.url.lastPathComponent,
+            detectedKinds: best.kinds,
+            warnings: warnings
+        )
+    }
+
+    nonisolated static func discoverSourceCandidates(
+        providerID: PlatformProviderID,
+        searchRoots: [URL]? = nil,
+        fileManager: FileManager = .default
+    ) -> [SourceCandidate] {
+        let roots = uniqueStandardizedURLs(searchRoots ?? defaultCandidateSearchRoots(fileManager: fileManager))
+            .map(\.standardizedFileURL)
+            .filter { fileManager.fileExists(atPath: $0.path) }
+
+        var candidatesByID: [String: SourceCandidate] = [:]
+        for root in roots {
+            let candidateFolders = boundedCandidateFolders(from: root, maxDepth: 4, maxFolderCount: 600, fileManager: fileManager)
+            var candidatesForRoot: [SourceCandidate] = []
+            for folderURL in candidateFolders {
+                guard let probe = probeLocalFolder(folderURL, providerID: providerID) else {
+                    continue
+                }
+
+                let candidate = SourceCandidate(
+                    providerID: probe.providerID,
+                    edition: probe.edition,
+                    sourceRootURL: probe.sourceRootURL,
+                    displayName: probe.displayName,
+                    confidence: probe.confidence,
+                    reason: "Found Java markers near \(root.lastPathComponent)",
+                    detectedKinds: probe.detectedKinds
+                )
+
+                candidatesForRoot.append(candidate)
+            }
+
+            for candidate in collapsedCandidates(
+                candidatesForRoot,
+                under: root,
+                providerID: providerID
+            ) {
+                if let existingCandidate = candidatesByID[candidate.id],
+                   existingCandidate.confidence >= candidate.confidence {
+                    continue
+                }
+
+                candidatesByID[candidate.id] = candidate
+            }
+        }
+
+        return candidatesByID.values.sorted {
+            if $0.confidence != $1.confidence {
+                return $0.confidence > $1.confidence
+            }
+
+            return $0.displayName.localizedStandardCompare($1.displayName) == .orderedAscending
+        }
+    }
+
+    nonisolated static func discoverItems(
+        in searchRootURL: URL,
+        onDiscovered: @Sendable (MinecraftContentItem) -> Void = { _ in }
+    ) throws -> [MinecraftContentItem] {
+        let fileManager = FileManager.default
+        var discoveredItems: [MinecraftContentItem] = []
+
+        for scanRootURL in contentScanRoots(for: searchRootURL, fileManager: fileManager) {
+            let savesRootURL = existingDirectory(
+                named: "saves",
+                in: scanRootURL,
+                fileManager: fileManager
+            ) ?? scanRootURL
+            let worldItems = try discoverWorlds(in: savesRootURL, fileManager: fileManager)
+            discoveredItems.append(contentsOf: worldItems)
+
+            if let resourcePacksURL = existingDirectory(named: "resourcepacks", in: scanRootURL, fileManager: fileManager) {
+                let resourcePackItems = try discoverResourcePacks(in: resourcePacksURL, fileManager: fileManager)
+                discoveredItems.append(contentsOf: resourcePackItems)
+            }
+
+            if let dataPacksURL = existingDirectory(named: "datapacks", in: scanRootURL, fileManager: fileManager) {
+                discoveredItems.append(contentsOf: try discoverJavaPackages(
+                    in: dataPacksURL,
+                    contentKind: .dataPack,
+                    platformType: .dataPack,
+                    packageExtension: "zip",
+                    fileManager: fileManager
+                ))
+            }
+
+            if let shaderPacksURL = existingDirectory(named: "shaderpacks", in: scanRootURL, fileManager: fileManager) {
+                discoveredItems.append(contentsOf: try discoverJavaPackages(
+                    in: shaderPacksURL,
+                    contentKind: .shaderPack,
+                    platformType: .shaderPack,
+                    packageExtension: "zip",
+                    fileManager: fileManager
+                ))
+            }
+
+            if let modsURL = existingDirectory(named: "mods", in: scanRootURL, fileManager: fileManager) {
+                discoveredItems.append(contentsOf: try discoverJavaPackages(
+                    in: modsURL,
+                    contentKind: .mod,
+                    platformType: .mod,
+                    packageExtension: "jar",
+                    fileManager: fileManager
+                ))
+            }
+        }
+
+        discoveredItems.sort(by: WorldScanner.sortItems)
+        discoveredItems.forEach(onDiscovered)
+        return discoveredItems
+    }
+
+    nonisolated static func enrich(item: MinecraftContentItem) async -> MinecraftContentItem {
+        var enrichedItem = item
+        let metadata = JavaContentMetadataReader.metadata(for: item)
+        enrichedItem.displayName = metadata?.displayName ?? displayName(for: item)
+        enrichedItem.iconURL = await JavaContentMetadataReader.cachedIconURL(for: item, metadata: metadata)
+        if metadata?.pack != nil || metadata?.mod != nil {
+            enrichedItem.platformMetadata = .java(JavaContentMetadata(
+                pack: metadata?.pack,
+                mod: metadata?.mod
+            ))
+        }
+        enrichedItem.hasKnownIcon = enrichedItem.iconURL != nil
+        enrichedItem.modifiedDate = WorldScanner.modifiedDate(for: item.folderURL)
+        enrichedItem.metadataLoaded = true
+        enrichedItem.previewLoaded = true
+        enrichedItem.sizeLoaded = false
+        return enrichedItem
+    }
+
+    nonisolated static func loadSize(for item: MinecraftContentItem) -> MinecraftContentItem {
+        var sizedItem = item
+        sizedItem.sizeBytes = contentSize(at: item.folderURL, fileManager: .default)
+        sizedItem.sizeLoaded = true
+        return sizedItem
+    }
+
+    nonisolated static func collectionSnapshots(in sourceRootURL: URL) -> [CollectionSnapshot] {
+        let fileManager = FileManager.default
+        var snapshots: [CollectionSnapshot] = []
+        for scanRootURL in contentScanRoots(for: sourceRootURL, fileManager: fileManager) {
+            let candidateRoots = [
+                existingDirectory(named: "saves", in: scanRootURL, fileManager: fileManager),
+                existingDirectory(named: "resourcepacks", in: scanRootURL, fileManager: fileManager),
+                existingDirectory(named: "datapacks", in: scanRootURL, fileManager: fileManager),
+                existingDirectory(named: "shaderpacks", in: scanRootURL, fileManager: fileManager),
+                existingDirectory(named: "mods", in: scanRootURL, fileManager: fileManager)
+            ]
+
+            for collectionURL in candidateRoots {
+                guard let collectionURL else {
+                    continue
+                }
+
+                if let snapshot = collectionSnapshot(
+                    for: collectionURL,
+                    sourceRootURL: sourceRootURL,
+                    fileManager: fileManager
+                ) {
+                    snapshots.append(snapshot)
+                }
+            }
+        }
+
+        return snapshots
+    }
+
+    nonisolated private static func discoverWorlds(in savesRootURL: URL, fileManager: FileManager) throws -> [MinecraftContentItem] {
+        let worldDirectories = try WorldScanner.immediateChildDirectories(of: savesRootURL, fileManager: fileManager)
+        return worldDirectories.compactMap { worldURL in
+            guard fileManager.fileExists(atPath: worldURL.appendingPathComponent("level.dat").path) else {
+                return nil
+            }
+
+            return MinecraftContentItem(
+                folderURL: worldURL,
+                folderName: worldURL.lastPathComponent,
+                contentType: .world,
+                sourceEdition: .java,
+                contentKind: .world,
+                platformType: .java(.world),
+                collectionRootURL: savesRootURL,
+                capabilities: .java(contentType: .world),
+                platformMetadata: .java(JavaContentMetadata())
+            )
+        }
+    }
+
+    nonisolated private static func discoverResourcePacks(in resourcePacksURL: URL, fileManager: FileManager) throws -> [MinecraftContentItem] {
+        try discoverJavaPackages(
+            in: resourcePacksURL,
+            contentKind: .resourcePack,
+            platformType: .resourcePack,
+            packageExtension: "zip",
+            fileManager: fileManager,
+            folderMarker: "pack.mcmeta"
+        )
+    }
+
+    nonisolated private static func discoverJavaPackages(
+        in collectionURL: URL,
+        contentKind: MinecraftContentKind,
+        platformType: JavaContentType,
+        packageExtension: String,
+        fileManager: FileManager,
+        folderMarker: String? = nil
+    ) throws -> [MinecraftContentItem] {
+        let children = try fileManager.contentsOfDirectory(
+            at: collectionURL,
+            includingPropertiesForKeys: [.isDirectoryKey, .isRegularFileKey],
+            options: [.skipsHiddenFiles]
+        )
+
+        return children.compactMap { childURL in
+            let values = try? childURL.resourceValues(forKeys: [.isDirectoryKey, .isRegularFileKey])
+            let isDirectory = values?.isDirectory == true
+            let isRegularFile = values?.isRegularFile == true
+
+            if isDirectory {
+                if let folderMarker,
+                   !fileManager.fileExists(atPath: childURL.appendingPathComponent(folderMarker).path) {
+                    return nil
+                }
+            } else if isRegularFile {
+                guard childURL.pathExtension.localizedCaseInsensitiveCompare(packageExtension) == .orderedSame else {
+                    return nil
+                }
+            } else {
+                return nil
+            }
+
+            return javaContentItem(
+                url: childURL,
+                contentKind: contentKind,
+                platformType: platformType,
+                collectionRootURL: collectionURL
+            )
+        }
+    }
+
+    nonisolated private static func existingDirectory(named name: String, in rootURL: URL, fileManager: FileManager) -> URL? {
+        let directoryURL = rootURL.appendingPathComponent(name, isDirectory: true)
+        guard (try? directoryURL.resourceValues(forKeys: [.isDirectoryKey]).isDirectory) == true else {
+            return nil
+        }
+
+        return directoryURL
+    }
+
+    nonisolated private static func javaContentItem(
+        url: URL,
+        contentKind: MinecraftContentKind,
+        platformType: JavaContentType,
+        collectionRootURL: URL
+    ) -> MinecraftContentItem {
+        MinecraftContentItem(
+            folderURL: url,
+            folderName: url.lastPathComponent,
+            contentType: contentKind == .world ? .world : .resourcePack,
+            sourceEdition: .java,
+            contentKind: contentKind,
+            platformType: .java(platformType),
+            collectionRootURL: collectionRootURL,
+            displayName: url.deletingPathExtension().lastPathComponent,
+            capabilities: .java(contentType: platformType),
+            platformMetadata: .java(JavaContentMetadata())
+        )
+    }
+
+    nonisolated private static func contentSize(at url: URL, fileManager: FileManager) -> Int64? {
+        let values = try? url.resourceValues(forKeys: [.isDirectoryKey, .fileSizeKey])
+        if values?.isDirectory == true {
+            return WorldScanner.folderSize(at: url, fileManager: fileManager)
+        }
+
+        return values?.fileSize.map(Int64.init)
+    }
+
+    nonisolated private static func localFolderProbeCandidates(for url: URL, fileManager: FileManager) -> [URL] {
+        var candidates = [url]
+        let children = (try? fileManager.contentsOfDirectory(
+            at: url,
+            includingPropertiesForKeys: [.isDirectoryKey],
+            options: []
+        )) ?? []
+        candidates.append(contentsOf: children.filter {
+            (try? $0.resourceValues(forKeys: [.isDirectoryKey]).isDirectory) == true
+        })
+        return candidates
+    }
+
+    nonisolated private static func collapsedCandidates(
+        _ candidates: [SourceCandidate],
+        under root: URL,
+        providerID: PlatformProviderID
+    ) -> [SourceCandidate] {
+        let uniqueCandidates = Dictionary(grouping: candidates, by: { sourceIdentityKey(for: $0.sourceRootURL) }).compactMap { _, groupedCandidates in
+            groupedCandidates.max { lhs, rhs in
+                lhs.confidence < rhs.confidence
+            }
+        }
+
+        guard uniqueCandidates.count > 1 else {
+            return uniqueCandidates
+        }
+
+        let detectedKinds = uniqueCandidates.reduce(into: Set<MinecraftContentKind>()) { result, candidate in
+            result.formUnion(candidate.detectedKinds)
+        }
+        let confidence = uniqueCandidates.map(\.confidence).max() ?? .medium
+        let standardizedRoot = root.standardizedFileURL
+
+        return [
+            SourceCandidate(
+                providerID: providerID,
+                edition: .java,
+                sourceRootURL: standardizedRoot,
+                displayName: standardizedRoot.lastPathComponent,
+                confidence: confidence,
+                reason: "Found multiple Java sources under \(standardizedRoot.lastPathComponent)",
+                detectedKinds: detectedKinds
+            )
+        ]
+    }
+
+    nonisolated private static func javaProbeScore(for url: URL, fileManager: FileManager) -> (value: Int, kinds: Set<MinecraftContentKind>) {
+        var score = 0
+        var kinds = Set<MinecraftContentKind>()
+
+        if existingDirectory(named: "saves", in: url, fileManager: fileManager) != nil {
+            kinds.insert(.world)
+            score += 25
+        }
+        if existingDirectory(named: "resourcepacks", in: url, fileManager: fileManager) != nil {
+            kinds.insert(.resourcePack)
+            score += 20
+        }
+        if existingDirectory(named: "datapacks", in: url, fileManager: fileManager) != nil {
+            kinds.insert(.dataPack)
+            score += 15
+        }
+        if existingDirectory(named: "shaderpacks", in: url, fileManager: fileManager) != nil {
+            kinds.insert(.shaderPack)
+            score += 15
+        }
+        if existingDirectory(named: "mods", in: url, fileManager: fileManager) != nil {
+            kinds.insert(.mod)
+            score += 20
+        }
+        if fileManager.fileExists(atPath: url.appendingPathComponent("options.txt").path)
+            || fileManager.fileExists(atPath: url.appendingPathComponent("launcher_profiles.json").path)
+            || fileManager.fileExists(atPath: url.appendingPathComponent(".curseclient").path) {
+            score += 15
+        }
+        if fileManager.fileExists(atPath: url.appendingPathComponent("region", isDirectory: true).path)
+            && fileManager.fileExists(atPath: url.appendingPathComponent("level.dat").path) {
+            kinds.insert(.world)
+            score += 35
+        }
+
+        return (score, kinds)
+    }
+
+    nonisolated private static func defaultCandidateSearchRoots(fileManager: FileManager) -> [URL] {
+        let homeURL = fileManager.homeDirectoryForCurrentUser
+        let applicationSupportURL = homeURL
+            .appendingPathComponent("Library", isDirectory: true)
+            .appendingPathComponent("Application Support", isDirectory: true)
+        let documentsURL = homeURL.appendingPathComponent("Documents", isDirectory: true)
+
+        return [
+            applicationSupportURL.appendingPathComponent("minecraft", isDirectory: true),
+            documentsURL.appendingPathComponent("curseforge/minecraft", isDirectory: true),
+            documentsURL.appendingPathComponent("CurseForge/Minecraft", isDirectory: true),
+            applicationSupportURL.appendingPathComponent("PrismLauncher/instances", isDirectory: true),
+            applicationSupportURL.appendingPathComponent("MultiMC/instances", isDirectory: true),
+            applicationSupportURL.appendingPathComponent("PolyMC/instances", isDirectory: true),
+            applicationSupportURL.appendingPathComponent("com.modrinth.theseus/profiles", isDirectory: true),
+            applicationSupportURL.appendingPathComponent("ATLauncher/instances", isDirectory: true),
+            applicationSupportURL.appendingPathComponent("gdlauncher_next/instances", isDirectory: true),
+            applicationSupportURL.appendingPathComponent("GDLauncher_next/instances", isDirectory: true)
+        ]
+    }
+
+    nonisolated private static func boundedCandidateFolders(
+        from rootURL: URL,
+        maxDepth: Int,
+        maxFolderCount: Int,
+        fileManager: FileManager
+    ) -> [URL] {
+        var folders: [URL] = []
+        var queue: [(url: URL, depth: Int)] = [(rootURL, 0)]
+        var seen = Set<String>()
+
+        while !queue.isEmpty && folders.count < maxFolderCount {
+            let current = queue.removeFirst()
+            let normalizedURL = current.url.standardizedFileURL
+            guard seen.insert(sourceIdentityKey(for: normalizedURL)).inserted else {
+                continue
+            }
+
+            folders.append(normalizedURL)
+            guard current.depth < maxDepth else {
+                continue
+            }
+
+            let children = (try? fileManager.contentsOfDirectory(
+                at: normalizedURL,
+                includingPropertiesForKeys: [.isDirectoryKey],
+                options: []
+            )) ?? []
+
+            let childDirectories = children
+                .filter { (try? $0.resourceValues(forKeys: [.isDirectoryKey]).isDirectory) == true }
+                .sorted { lhs, rhs in
+                    lhs.lastPathComponent.localizedStandardCompare(rhs.lastPathComponent) == .orderedAscending
+                }
+
+            queue.append(contentsOf: childDirectories.map { ($0, current.depth + 1) })
+        }
+
+        return folders
+    }
+
+    nonisolated private static func contentScanRoots(for sourceRootURL: URL, fileManager: FileManager) -> [URL] {
+        let standardizedRoot = sourceRootURL.standardizedFileURL
+        if javaProbeScore(for: standardizedRoot, fileManager: fileManager).value > 0 {
+            return [standardizedRoot]
+        }
+
+        let discoveredRoots = boundedCandidateFolders(
+            from: standardizedRoot,
+            maxDepth: 4,
+            maxFolderCount: 600,
+            fileManager: fileManager
+        ).filter { candidateURL in
+            candidateURL != standardizedRoot
+                && javaProbeScore(for: candidateURL, fileManager: fileManager).value > 0
+        }
+
+        return uniqueStandardizedURLs(discoveredRoots).sorted {
+            $0.path.localizedStandardCompare($1.path) == .orderedAscending
+        }
+    }
+
+    nonisolated private static func uniqueStandardizedURLs(_ urls: [URL]) -> [URL] {
+        var seen = Set<String>()
+        var result: [URL] = []
+        result.reserveCapacity(urls.count)
+
+        for url in urls {
+            let standardizedURL = url.standardizedFileURL
+            guard seen.insert(sourceIdentityKey(for: standardizedURL)).inserted else {
+                continue
+            }
+
+            result.append(standardizedURL)
+        }
+
+        return result
+    }
+
+    nonisolated private static func collectionSnapshot(
+        for collectionURL: URL,
+        sourceRootURL: URL,
+        fileManager: FileManager
+    ) -> CollectionSnapshot? {
+        guard fileManager.fileExists(atPath: collectionURL.path) else {
+            return nil
+        }
+
+        let children = (try? fileManager.contentsOfDirectory(
+            at: collectionURL,
+            includingPropertiesForKeys: [.isDirectoryKey, .isRegularFileKey, .contentModificationDateKey, .fileSizeKey],
+            options: [.skipsHiddenFiles]
+        )) ?? []
+        let childSnapshots = children.compactMap { childURL -> (name: String, modifiedDate: Date?, size: Int?)? in
+            let values = try? childURL.resourceValues(forKeys: [
+                .isDirectoryKey,
+                .isRegularFileKey,
+                .contentModificationDateKey,
+                .fileSizeKey
+            ])
+            guard values?.isDirectory == true || values?.isRegularFile == true else {
+                return nil
+            }
+
+            return (childURL.lastPathComponent, values?.contentModificationDate, values?.fileSize)
+        }.sorted {
+            $0.name.localizedStandardCompare($1.name) == .orderedAscending
+        }
+
+        let modifiedDate = try? collectionURL.resourceValues(forKeys: [.contentModificationDateKey]).contentModificationDate
+        let childFingerprint = childSnapshots.map { child in
+            [
+                child.name,
+                child.modifiedDate?.timeIntervalSince1970.formatted() ?? "nil",
+                child.size.map(String.init) ?? "nil"
+            ].joined(separator: "@")
+        }.joined(separator: "|")
+
+        let folderName = relativePath(from: sourceRootURL.standardizedFileURL, to: collectionURL.standardizedFileURL)
+            ?? collectionURL.lastPathComponent
+
+        return CollectionSnapshot(
+            folderName: folderName,
+            modifiedDate: modifiedDate,
+            childDirectoryCount: childSnapshots.count,
+            fingerprint: [
+                folderName,
+                String(childSnapshots.count),
+                modifiedDate?.timeIntervalSince1970.formatted() ?? "nil",
+                childFingerprint
+            ].joined(separator: "::")
+        )
+    }
+
+    nonisolated private static func relativePath(from rootURL: URL, to childURL: URL) -> String? {
+        let rootPath = rootURL.standardizedFileURL.path
+        let childPath = childURL.standardizedFileURL.path
+        guard childPath.hasPrefix(rootPath + "/") else {
+            return nil
+        }
+
+        return String(childPath.dropFirst(rootPath.count + 1))
+    }
+
+    nonisolated private static func displayName(for item: MinecraftContentItem) -> String {
+        guard item.contentKind == .world else {
+            return item.folderName
+        }
+
+        let levelNameURL = item.folderURL.appendingPathComponent("levelname.txt")
+        guard
+            let value = try? String(contentsOf: levelNameURL, encoding: .utf8)
+                .trimmingCharacters(in: .whitespacesAndNewlines),
+            !value.isEmpty
+        else {
+            return item.folderName
+        }
+
+        return value
+    }
+}
+
 private let packReferenceIndexStore = PackReferenceIndexStore()

World Manager for Minecraft/Services/ArchiveInspection/JavaContentMetadataReader.swift

@@ -0,0 +1,422 @@
+// SPDX-FileCopyrightText: 2026 John Burwell and contributors
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+import Foundation
+
+nonisolated struct JavaArchiveMetadata: Hashable, Sendable {
+    var displayName: String?
+    var pack: JavaPackMetadata?
+    var mod: JavaModMetadata?
+    var iconEntryPath: String?
+}
+
+enum JavaContentMetadataReader {
+    nonisolated static func metadata(for item: MinecraftContentItem) -> JavaArchiveMetadata? {
+        let values = try? item.folderURL.resourceValues(forKeys: [.isDirectoryKey, .isRegularFileKey])
+        if values?.isDirectory == true {
+            return directoryMetadata(for: item)
+        }
+
+        if values?.isRegularFile == true {
+            return archiveMetadata(for: item.folderURL, contentKind: item.contentKind)
+        }
+
+        return nil
+    }
+
+    nonisolated static func cachedIconURL(for item: MinecraftContentItem, metadata: JavaArchiveMetadata?) async -> URL? {
+        let values = try? item.folderURL.resourceValues(forKeys: [.isDirectoryKey, .isRegularFileKey])
+        if values?.isDirectory == true {
+            return await ImageCacheStore.shared.cachedImageURL(for: directoryIconURL(for: item))
+        }
+
+        guard
+            values?.isRegularFile == true,
+            let metadata,
+            let iconEntryPath = metadata.iconEntryPath,
+            let archive = try? ZipArchiveReader(url: item.folderURL),
+            let entry = archive.entry(named: iconEntryPath),
+            let data = try? archive.extract(entry)
+        else {
+            return nil
+        }
+
+        return await ImageCacheStore.shared.cachedImageURL(
+            forRemoteData: data,
+            cacheKey: "java-archive-icon:\(item.folderURL.standardizedFileURL.path):\(iconEntryPath)",
+            pathExtension: URL(fileURLWithPath: iconEntryPath).pathExtension
+        )
+    }
+
+    nonisolated private static func directoryMetadata(for item: MinecraftContentItem) -> JavaArchiveMetadata {
+        let pack = packMetadata(from: item.folderURL.appendingPathComponent("pack.mcmeta"))
+        let iconURL = directoryIconURL(for: item)
+
+        return JavaArchiveMetadata(
+            displayName: nil,
+            pack: pack,
+            mod: nil,
+            iconEntryPath: iconURL?.lastPathComponent
+        )
+    }
+
+    nonisolated private static func archiveMetadata(for archiveURL: URL, contentKind: MinecraftContentKind) -> JavaArchiveMetadata? {
+        guard let archive = try? ZipArchiveReader(url: archiveURL) else {
+            return nil
+        }
+
+        let pack = packMetadata(from: archive)
+        let modMetadata = contentKind == .mod ? modMetadata(from: archive) : nil
+        let iconEntryPath = iconEntryPath(
+            in: archive,
+            preferredPath: modMetadata?.iconPath,
+            contentKind: contentKind
+        )
+
+        return JavaArchiveMetadata(
+            displayName: modMetadata?.displayName,
+            pack: pack,
+            mod: modMetadata?.metadata,
+            iconEntryPath: iconEntryPath
+        )
+    }
+
+    nonisolated private static func directoryIconURL(for item: MinecraftContentItem) -> URL? {
+        let candidateNames: [String]
+        switch item.contentKind {
+        case .mod:
+            candidateNames = ["icon.png", "logo.png", "mod_logo.png", "catalogue_icon.png", "pack.png"]
+        case .resourcePack, .dataPack, .shaderPack:
+            candidateNames = ["pack.png", "icon.png", "logo.png"]
+        case .world, .behaviorPack, .skinPack, .worldTemplate:
+            candidateNames = ["icon.png", "pack.png"]
+        }
+
+        for candidateName in candidateNames {
+            let candidateURL = item.folderURL.appendingPathComponent(candidateName)
+            if FileManager.default.fileExists(atPath: candidateURL.path) {
+                return candidateURL
+            }
+        }
+
+        return nil
+    }
+
+    nonisolated private static func packMetadata(from metadataURL: URL) -> JavaPackMetadata? {
+        guard let data = try? Data(contentsOf: metadataURL) else {
+            return nil
+        }
+
+        return packMetadata(from: data)
+    }
+
+    nonisolated private static func packMetadata(from archive: ZipArchiveReader) -> JavaPackMetadata? {
+        guard
+            let entry = archive.entry(named: "pack.mcmeta"),
+            let data = try? archive.extract(entry)
+        else {
+            return nil
+        }
+
+        return packMetadata(from: data)
+    }
+
+    nonisolated private static func packMetadata(from data: Data) -> JavaPackMetadata? {
+        guard
+            let jsonObject = try? JSONSerialization.jsonObject(with: data) as? [String: Any],
+            let packObject = jsonObject["pack"] as? [String: Any]
+        else {
+            return nil
+        }
+
+        return JavaPackMetadata(
+            packFormat: packObject["pack_format"] as? Int,
+            supportedFormats: supportedFormatsValue(from: packObject["supported_formats"]),
+            description: textValue(from: packObject["description"])
+        )
+    }
+
+    nonisolated private static func modMetadata(
+        from archive: ZipArchiveReader
+    ) -> (displayName: String?, iconPath: String?, metadata: JavaModMetadata)? {
+        if let tomlMetadata = modTOMLMetadata(from: archive) {
+            return tomlMetadata
+        }
+
+        if let jsonMetadata = modJSONMetadata(from: archive, entryName: "fabric.mod.json") {
+            return jsonMetadata
+        }
+
+        if let jsonMetadata = modJSONMetadata(from: archive, entryName: "quilt.mod.json") {
+            return jsonMetadata
+        }
+
+        return nil
+    }
+
+    nonisolated private static func modTOMLMetadata(
+        from archive: ZipArchiveReader
+    ) -> (displayName: String?, iconPath: String?, metadata: JavaModMetadata)? {
+        let entryNames = ["META-INF/neoforge.mods.toml", "META-INF/mods.toml"]
+        for entryName in entryNames {
+            guard
+                let entry = archive.entry(named: entryName),
+                let data = try? archive.extract(entry),
+                let text = String(data: data, encoding: .utf8)
+            else {
+                continue
+            }
+
+            let firstModSection = firstTOMLSection(named: "[[mods]]", in: text)
+            let dependenciesSection = firstTOMLSection(named: "[[dependencies.", in: text)
+            let displayName = tomlStringValue(forKey: "displayName", in: firstModSection)
+            let logoFile = tomlStringValue(forKey: "logoFile", in: firstModSection)
+            let metadata = JavaModMetadata(
+                modID: tomlStringValue(forKey: "modId", in: firstModSection),
+                version: tomlStringValue(forKey: "version", in: firstModSection),
+                description: tomlStringValue(forKey: "description", in: firstModSection),
+                authors: stringListValue(from: tomlStringValue(forKey: "authors", in: firstModSection)),
+                license: tomlStringValue(forKey: "license", in: text),
+                environment: nil,
+                minecraftVersionRequirement: minecraftDependencyRequirement(fromTOMLSection: dependenciesSection)
+            )
+            if displayName != nil || logoFile != nil || metadata.hasValues {
+                return (displayName, logoFile, metadata)
+            }
+        }
+
+        return nil
+    }
+
+    nonisolated private static func modJSONMetadata(
+        from archive: ZipArchiveReader,
+        entryName: String
+    ) -> (displayName: String?, iconPath: String?, metadata: JavaModMetadata)? {
+        guard
+            let entry = archive.entry(named: entryName),
+            let data = try? archive.extract(entry),
+            let jsonObject = try? JSONSerialization.jsonObject(with: data) as? [String: Any]
+        else {
+            return nil
+        }
+
+        let iconPath: String?
+        if let iconString = jsonObject["icon"] as? String {
+            iconPath = iconString
+        } else if let icons = jsonObject["icon"] as? [String: String] {
+            iconPath = icons.sorted { lhs, rhs in lhs.key.localizedStandardCompare(rhs.key) == .orderedDescending }.first?.value
+        } else {
+            iconPath = nil
+        }
+
+        let metadata = JavaModMetadata(
+            modID: (jsonObject["id"] as? String)?.nilIfBlank,
+            version: (jsonObject["version"] as? String)?.nilIfBlank,
+            description: textValue(from: jsonObject["description"]),
+            authors: authorsValue(from: jsonObject["authors"]),
+            license: licenseValue(from: jsonObject["license"]),
+            environment: (jsonObject["environment"] as? String)?.nilIfBlank,
+            minecraftVersionRequirement: minecraftDependencyRequirement(fromJSON: jsonObject)
+        )
+
+        return (
+            (jsonObject["name"] as? String)?.nilIfBlank,
+            iconPath?.nilIfBlank,
+            metadata
+        )
+    }
+
+    nonisolated private static func firstTOMLSection(named sectionName: String, in text: String) -> String {
+        guard let sectionRange = text.range(of: sectionName) else {
+            return text
+        }
+
+        let sectionText = text[sectionRange.upperBound...]
+        if let nextSectionRange = sectionText.range(of: "\n[") {
+            return String(sectionText[..<nextSectionRange.lowerBound])
+        }
+
+        return String(sectionText)
+    }
+
+    nonisolated private static func tomlStringValue(forKey key: String, in text: String) -> String? {
+        for rawLine in text.components(separatedBy: .newlines) {
+            let line = rawLine.trimmingCharacters(in: .whitespacesAndNewlines)
+            guard line.hasPrefix(key) else {
+                continue
+            }
+
+            let parts = line.split(separator: "=", maxSplits: 1).map(String.init)
+            guard parts.count == 2 else {
+                continue
+            }
+
+            return parts[1]
+                .trimmingCharacters(in: .whitespacesAndNewlines)
+                .trimmingCharacters(in: CharacterSet(charactersIn: "\"'"))
+                .nilIfBlank
+        }
+
+        return nil
+    }
+
+    nonisolated private static func minecraftDependencyRequirement(fromTOMLSection text: String) -> String? {
+        guard tomlStringValue(forKey: "modId", in: text) == "minecraft" else {
+            return nil
+        }
+
+        return tomlStringValue(forKey: "versionRange", in: text)
+    }
+
+    nonisolated private static func minecraftDependencyRequirement(fromJSON jsonObject: [String: Any]) -> String? {
+        for key in ["depends", "dependencies", "breaks"] {
+            guard let dependencies = jsonObject[key] as? [String: Any] else {
+                continue
+            }
+
+            if let minecraft = dependencies["minecraft"] as? String {
+                return minecraft.nilIfBlank
+            }
+            if let minecraft = dependencies["minecraft"] as? [String: Any] {
+                return textValue(from: minecraft["version"])
+            }
+        }
+
+        return nil
+    }
+
+    nonisolated private static func authorsValue(from value: Any?) -> [String] {
+        if let author = value as? String {
+            return stringListValue(from: author)
+        }
+
+        if let authors = value as? [String] {
+            return authors.compactMap(\.nilIfBlank)
+        }
+
+        if let authors = value as? [[String: Any]] {
+            return authors.compactMap { author in
+                textValue(from: author["name"])
+            }
+        }
+
+        return []
+    }
+
+    nonisolated private static func licenseValue(from value: Any?) -> String? {
+        if let license = value as? String {
+            return license.nilIfBlank
+        }
+
+        if let licenses = value as? [String] {
+            let values = licenses.compactMap(\.nilIfBlank)
+            return values.isEmpty ? nil : values.joined(separator: ", ")
+        }
+
+        return nil
+    }
+
+    nonisolated private static func stringListValue(from value: String?) -> [String] {
+        guard let value else {
+            return []
+        }
+
+        return value
+            .split { character in
+                character == "," || character == ";"
+            }
+            .map(String.init)
+            .compactMap(\.nilIfBlank)
+    }
+
+    nonisolated private static func iconEntryPath(
+        in archive: ZipArchiveReader,
+        preferredPath: String?,
+        contentKind: MinecraftContentKind
+    ) -> String? {
+        let candidateNames: [String]
+        switch contentKind {
+        case .mod:
+            candidateNames = [preferredPath, "icon.png", "logo.png", "mod_logo.png", "catalogue_icon.png", "pack.png"].compactMap(\.self)
+        case .resourcePack, .dataPack, .shaderPack:
+            candidateNames = [preferredPath, "pack.png", "icon.png", "logo.png"].compactMap(\.self)
+        case .world, .behaviorPack, .skinPack, .worldTemplate:
+            candidateNames = [preferredPath, "icon.png", "pack.png"].compactMap(\.self)
+        }
+
+        for candidateName in candidateNames {
+            if let entry = archive.entry(named: candidateName), !entry.isDirectory {
+                return entry.path
+            }
+        }
+
+        return archive.entries
+            .filter { !$0.isDirectory && $0.path.localizedCaseInsensitiveContains("icon") && $0.path.hasSuffix(".png") }
+            .sorted { lhs, rhs in lhs.path.localizedStandardCompare(rhs.path) == .orderedAscending }
+            .first?
+            .path
+    }
+
+    nonisolated private static func textValue(from value: Any?) -> String? {
+        if let text = value as? String {
+            return text.nilIfBlank
+        }
+
+        if let object = value as? [String: Any] {
+            if let text = object["text"] as? String {
+                return text.nilIfBlank
+            }
+            if let translate = object["translate"] as? String {
+                return translate.nilIfBlank
+            }
+        }
+
+        return nil
+    }
+
+    nonisolated private static func supportedFormatsValue(from value: Any?) -> String? {
+        if let format = value as? Int {
+            return String(format)
+        }
+
+        if let formats = value as? [Int] {
+            return formats.map(String.init).joined(separator: ", ").nilIfBlank
+        }
+
+        if let object = value as? [String: Any] {
+            let minValue = object["min_inclusive"] as? Int
+            let maxValue = object["max_inclusive"] as? Int
+            switch (minValue, maxValue) {
+            case (.some(let minValue), .some(let maxValue)):
+                return "\(minValue)-\(maxValue)"
+            case (.some(let minValue), .none):
+                return "\(minValue)+"
+            case (.none, .some(let maxValue)):
+                return "Up to \(maxValue)"
+            case (.none, .none):
+                return nil
+            }
+        }
+
+        return nil
+    }
+}
+
+private extension JavaModMetadata {
+    nonisolated var hasValues: Bool {
+        modID != nil
+            || version != nil
+            || description != nil
+            || !authors.isEmpty
+            || license != nil
+            || environment != nil
+            || minecraftVersionRequirement != nil
+    }
+}
+
+private extension String {
+    nonisolated var nilIfBlank: String? {
+        let trimmed = trimmingCharacters(in: .whitespacesAndNewlines)
+        return trimmed.isEmpty ? nil : trimmed
+    }
+}

World Manager for Minecraft/Services/ArchiveInspection/MinecraftContentMetadataReader.swift

@@ -10,7 +10,9 @@ struct MinecraftManifestMetadata: Sendable, Hashable {
     let minimumEngineVersion: String?
 }
 
-enum MinecraftContentMetadataReader {
+typealias MinecraftContentMetadataReader = BedrockContentMetadataReader
+
+enum BedrockContentMetadataReader {
     nonisolated static func displayName(
         for directoryURL: URL,
         contentType: MinecraftContentType,

World Manager for Minecraft/Services/ArchiveInspection/MinecraftPackageInspector.swift

@@ -147,7 +147,7 @@ enum MinecraftPackageInspector {
         return contentRootURL
     }
 
-    nonisolated static func resolvedContentRootPath(
+    nonisolated private static func resolvedContentRootPath(
         in entries: [ZipArchiveEntry],
         archivePathExtension: String
     ) throws -> String {
@@ -181,7 +181,7 @@ enum MinecraftPackageInspector {
         return root
     }
 
-    nonisolated static func containsContentMarkers(in filePaths: [String], prefix: String) -> Bool {
+    nonisolated private static func containsContentMarkers(in filePaths: [String], prefix: String) -> Bool {
         let normalizedPrefix = prefix.isEmpty ? "" : prefix + "/"
 
         let worldMarkers = ["level.dat", "levelname.txt"]

World Manager for Minecraft/Services/ArchiveInspection/ZipArchiveReader.swift

@@ -11,14 +11,12 @@ nonisolated struct ZipArchiveEntry: Sendable, Hashable {
     let uncompressedSize: UInt32
     let localHeaderOffset: UInt32
     let isDirectory: Bool
-    let isSymbolicLink: Bool
 }
 
 nonisolated enum ZipArchiveReaderError: LocalizedError {
     case invalidArchive
     case unsupportedCompressionMethod(UInt16)
     case unsupportedFeatures(String)
-    case unsafeEntryPath(String)
     case entryNotFound(String)
     case decompressionFailed(Int32)
 
@@ -30,8 +28,6 @@ nonisolated enum ZipArchiveReaderError: LocalizedError {
             return "Unsupported ZIP compression method: \(method)."
         case .unsupportedFeatures(let message):
             return message
-        case .unsafeEntryPath(let path):
-            return "The ZIP archive contains an unsafe entry path: \(path)"
         case .entryNotFound(let path):
             return "ZIP entry not found: \(path)"
         case .decompressionFailed(let code):
@@ -45,7 +41,7 @@ nonisolated struct ZipArchiveReader {
     let entries: [ZipArchiveEntry]
 
     init(url: URL) throws {
-        self.data = try Data(contentsOf: url, options: .mappedIfSafe)
+        self.data = try Data(contentsOf: url)
         self.entries = try ZipArchiveReader.parseEntries(in: data)
     }
 
@@ -82,9 +78,6 @@ nonisolated struct ZipArchiveReader {
 
         switch entry.compressionMethod {
         case 0:
-            guard compressedData.count == Int(entry.uncompressedSize) else {
-                throw ZipArchiveReaderError.invalidArchive
-            }
             return compressedData
         case 8:
             return try Self.inflateRawDeflate(compressedData, expectedSize: Int(entry.uncompressedSize))
@@ -122,7 +115,6 @@ nonisolated struct ZipArchiveReader {
             let extraFieldLength = Int(data.readUInt16LE(at: offset + 30))
             let fileCommentLength = Int(data.readUInt16LE(at: offset + 32))
             let localHeaderOffset = data.readUInt32LE(at: offset + 42)
-            let externalAttributes = data.readUInt32LE(at: offset + 38)
 
             let filenameStart = offset + 46
             let filenameEnd = filenameStart + filenameLength
@@ -135,9 +127,7 @@ nonisolated struct ZipArchiveReader {
                 throw ZipArchiveReaderError.invalidArchive
             }
 
-            try validateEntryPath(filename)
             let normalizedPath = Self.normalizedPath(filename)
-            let unixMode = UInt16((externalAttributes >> 16) & 0xffff)
             entries.append(
                 ZipArchiveEntry(
                     path: normalizedPath,
@@ -145,8 +135,7 @@ nonisolated struct ZipArchiveReader {
                     compressedSize: compressedSize,
                     uncompressedSize: uncompressedSize,
                     localHeaderOffset: localHeaderOffset,
-                    isDirectory: normalizedPath.hasSuffix("/"),
-                    isSymbolicLink: unixMode & 0o170000 == 0o120000
+                    isDirectory: normalizedPath.hasSuffix("/")
                 )
             )
 
@@ -189,18 +178,6 @@ nonisolated struct ZipArchiveReader {
         return joined
     }
 
-    private static func validateEntryPath(_ path: String) throws {
-        let replaced = path.replacingOccurrences(of: "\\", with: "/")
-        let components = replaced.split(separator: "/", omittingEmptySubsequences: false)
-        guard
-            !replaced.hasPrefix("/"),
-            !replaced.contains("\0"),
-            !components.contains(where: { $0 == ".." })
-        else {
-            throw ZipArchiveReaderError.unsafeEntryPath(path)
-        }
-    }
-
     private static func inflateRawDeflate(_ data: Data, expectedSize: Int) throws -> Data {
         if data.isEmpty {
             return Data()
@@ -251,17 +228,11 @@ nonisolated struct ZipArchiveReader {
                     let producedByteCount = bufferPointer.count - Int(stream.avail_out)
                     if producedByteCount > 0 {
                         output.append(contentsOf: bufferPointer.prefix(producedByteCount))
-                        guard output.count <= expectedSize else {
-                            throw ZipArchiveReaderError.invalidArchive
-                        }
                     }
                 }
             } while status != Z_STREAM_END
         }
 
-        guard output.count == expectedSize else {
-            throw ZipArchiveReaderError.invalidArchive
-        }
         return output
     }
 }

World Manager for Minecraft/Services/Sources/Core/SourceLibrary.swift

@@ -6,6 +6,11 @@ import Foundation
 import OSLog
 import UniformTypeIdentifiers
 
+enum SourceLibraryCommand: Sendable {
+    case discoverSourceCandidates
+    case refreshAllSources
+}
+
 @MainActor
 final class SourceLibrary: ObservableObject, SourceScanSessionHosting, SourcePersistenceHosting, ConnectedDeviceRuntimeHosting, LocalSourceRuntimeHosting, SourceSyncRuntimeHosting {
     private static let enrichmentWorkerCount = 4
@@ -28,11 +33,13 @@ final class SourceLibrary: ObservableObject, SourceScanSessionHosting, SourcePer
         }
     }
     @Published var connectedDevices: [ConnectedDeviceSidebarEntry] = []
+    @Published var sourceCandidates: [SourceCandidate] = []
+    @Published var isDiscoveringSourceCandidates = false
     @Published var isRestoringPersistedSources = true
-    @Published var installationStateBySourceID: [URL: SourceInstallationState] = [:]
 
     private var scanTasks: [URL: Task<Void, Never>] = [:]
     private var automaticSyncTasks: [URL: Task<Void, Never>] = [:]
+    private var candidateDiscoveryTask: Task<Void, Never>?
     private var connectedDeviceRefreshTask: Task<Void, Never>?
     private var localSourceRefreshTask: Task<Void, Never>?
     private let persistenceStore: SourcePersistenceStore
@@ -52,28 +59,35 @@ final class SourceLibrary: ObservableObject, SourceScanSessionHosting, SourcePer
         sourceAccessMethod: SourceAccessMethod = LocalFolderSourceAccess(),
         connectedDeviceAccessMethod: ConnectedDeviceSourceAccessMethod? = nil,
         notificationService: ScanNotificationServicing? = nil,
-        itemActionService: ContentItemActionService = ContentItemActionService()
+        itemActionService: ContentItemActionService = ContentItemActionService(),
+        restoresPersistedSources: Bool = true,
+        startsBackgroundRefresh: Bool = true
     ) {
         self.persistenceStore = persistenceStore
         self.sourceAccessMethod = sourceAccessMethod
         self.connectedDeviceAccessMethod = connectedDeviceAccessMethod
         self.notificationService = notificationService ?? ScanNotificationService.shared
         self.itemActionService = itemActionService
+        self.isRestoringPersistedSources = restoresPersistedSources
 
-        Task { [weak self] in
-            guard let self else {
-                return
+        if restoresPersistedSources {
+            Task { [weak self] in
+                guard let self else {
+                    return
+                }
+                await SourcePersistenceCoordinator.restoreSources(on: self, using: self.persistenceStore)
             }
-            await SourcePersistenceCoordinator.restoreSources(on: self, using: self.persistenceStore)
         }
 
-        localSourceRefreshTask = Task { [weak self] in
-            await self?.runLocalSourceRefreshLoop()
-        }
+        if startsBackgroundRefresh {
+            localSourceRefreshTask = Task { [weak self] in
+                await self?.runLocalSourceRefreshLoop()
+            }
 
-        if connectedDeviceAccessMethod != nil {
-            connectedDeviceRefreshTask = Task { [weak self] in
-                await self?.runConnectedDeviceRefreshLoop()
+            if connectedDeviceAccessMethod != nil {
+                connectedDeviceRefreshTask = Task { [weak self] in
+                    await self?.runConnectedDeviceRefreshLoop()
+                }
             }
         }
     }
@@ -81,6 +95,7 @@ final class SourceLibrary: ObservableObject, SourceScanSessionHosting, SourcePer
     deinit {
         connectedDeviceRefreshTask?.cancel()
         localSourceRefreshTask?.cancel()
+        candidateDiscoveryTask?.cancel()
         automaticSyncTasks.values.forEach { $0.cancel() }
         scanTasks.values.forEach { $0.cancel() }
     }
@@ -93,6 +108,22 @@ final class SourceLibrary: ObservableObject, SourceScanSessionHosting, SourcePer
         visibleSources
     }
 
+    var sidebarConnectedDevices: [ConnectedDeviceSidebarEntry] {
+        connectedDevices.filter { entry in
+            guard entry.matchedSourceID == nil else {
+                return false
+            }
+
+            return !sources.contains { source in
+                guard case .connectedDevice(let device, _) = source.origin else {
+                    return false
+                }
+
+                return device.udid == entry.device.udid
+            }
+        }
+    }
+
     func sourceID(forItemID itemID: URL) -> URL? {
         sourceIDByItemID[itemID]
     }
@@ -111,6 +142,8 @@ final class SourceLibrary: ObservableObject, SourceScanSessionHosting, SourcePer
         connectedDeviceRefreshTask = nil
         localSourceRefreshTask?.cancel()
         localSourceRefreshTask = nil
+        candidateDiscoveryTask?.cancel()
+        candidateDiscoveryTask = nil
 
         for task in automaticSyncTasks.values {
             task.cancel()
@@ -138,40 +171,121 @@ final class SourceLibrary: ObservableObject, SourceScanSessionHosting, SourcePer
         )
     }
 
-    func addSource(at url: URL) -> URL {
-        let normalizedURL = url.standardizedFileURL
-        let bookmarkData = securityScopedBookmarkData(for: normalizedURL)
+    func perform(_ command: SourceLibraryCommand) {
+        switch command {
+        case .discoverSourceCandidates:
+            discoverSourceCandidates()
+        case .refreshAllSources:
+            for source in visibleSources where source.availability == .available {
+                startScan(for: source.id, mode: .fullScan)
+            }
+        }
+    }
 
-        if sources.contains(where: { $0.id == normalizedURL }) {
-            updateSource(normalizedURL) { source in
+    func addSource(at url: URL) async -> URL {
+        let selectedURL = url.standardizedFileURL
+        let probe = await sourceAccessMethod.probeLocalFolder(selectedURL)
+        let normalizedURL = (probe?.sourceRootURL ?? selectedURL).standardizedFileURL
+        let bookmarkData = securityScopedBookmarkData(for: normalizedURL) ?? securityScopedBookmarkData(for: selectedURL)
+        let providerID = probe?.providerID ?? LocalFolderSourceAccess().accessorIdentifier
+        let edition = probe?.edition ?? .bedrock
+
+        if let existingSourceID = existingSourceID(matching: normalizedURL) {
+            sourceCandidates.removeAll { sourceIdentityKey(for: $0.sourceRootURL) == sourceIdentityKey(for: normalizedURL) }
+            updateSource(existingSourceID) { source in
                 if source.bookmarkData == nil {
                     source.bookmarkData = bookmarkData
                 }
-                source.accessDescriptor = sourceAccessMethod.accessDescriptor(for: source)
+                source.accessDescriptor = SourceAccessDescriptor(
+                    accessorIdentifier: providerID,
+                    kind: .localFolder,
+                    refreshStrategy: .eagerFullScan
+                )
+                source.providerID = providerID
+                source.edition = edition
                 source.capabilities = source.origin.defaultCapabilities
+                if let probe {
+                    source.displayName = probe.displayName
+                    if let warning = probe.warnings.first {
+                        source.scanDiagnostic = warning
+                    }
+                }
             }
-            startScan(for: normalizedURL, mode: .fullScan)
-            return normalizedURL
+            startScan(for: existingSourceID, mode: .fullScan)
+            return existingSourceID
         }
 
-        let source = MinecraftSource(
+        var source = MinecraftSource(
             folderURL: normalizedURL,
             bookmarkData: bookmarkData,
             accessDescriptor: SourceAccessDescriptor(
-                accessorIdentifier: LocalFolderSourceAccess().accessorIdentifier,
+                accessorIdentifier: providerID,
                 kind: .localFolder,
                 refreshStrategy: .eagerFullScan
             )
         )
-        return addSource(source, shouldPersist: true, shouldScan: true)
+        source.providerID = providerID
+        source.edition = edition
+        source.displayName = probe?.displayName ?? normalizedURL.lastPathComponent
+        if let warning = probe?.warnings.first {
+            source.scanDiagnostic = warning
+        }
+        let sourceID = addSource(source, shouldPersist: true, shouldScan: true)
+        sourceCandidates.removeAll { sourceIdentityKey(for: $0.sourceRootURL) == sourceIdentityKey(for: sourceID) }
+        return sourceID
+    }
+
+    func addSource(candidate: SourceCandidate) async -> URL {
+        let normalizedURL = candidate.sourceRootURL.standardizedFileURL
+        let bookmarkData = securityScopedBookmarkData(for: normalizedURL)
+
+        if let existingSourceID = existingSourceID(matching: normalizedURL) {
+            updateSource(existingSourceID) { source in
+                if source.bookmarkData == nil {
+                    source.bookmarkData = bookmarkData
+                }
+                source.accessDescriptor = SourceAccessDescriptor(
+                    accessorIdentifier: candidate.providerID,
+                    kind: .localFolder,
+                    refreshStrategy: .eagerFullScan
+                )
+                source.providerID = candidate.providerID
+                source.edition = candidate.edition
+                source.displayName = candidate.displayName
+                source.capabilities = source.origin.defaultCapabilities
+            }
+            removeSourceCandidates(matching: candidate, sourceID: existingSourceID)
+            startScan(for: existingSourceID, mode: .fullScan)
+            return existingSourceID
+        }
+
+        var source = MinecraftSource(
+            folderURL: normalizedURL,
+            bookmarkData: bookmarkData,
+            accessDescriptor: SourceAccessDescriptor(
+                accessorIdentifier: candidate.providerID,
+                kind: .localFolder,
+                refreshStrategy: .eagerFullScan
+            )
+        )
+        source.providerID = candidate.providerID
+        source.edition = candidate.edition
+        source.displayName = candidate.displayName
+
+        let sourceID = addSource(source, shouldPersist: true, shouldScan: true)
+        removeSourceCandidates(matching: candidate, sourceID: sourceID)
+        return sourceID
     }
 
     @discardableResult
     func addSource(_ source: MinecraftSource, shouldPersist: Bool = false, shouldScan: Bool = true) -> URL {
-        if sources.contains(where: { $0.id == source.id }) {
-            updateSource(source.id) { existingSource in
+        if let existingSourceID = existingSourceID(matching: source.id) {
+            updateSource(existingSourceID) { existingSource in
                 existingSource.origin = source.origin
                 existingSource.accessDescriptor = source.accessDescriptor
+                existingSource.providerID = source.accessDescriptor.accessorIdentifier
+                existingSource.edition = source.edition
+                existingSource.accessStatus = source.origin.defaultAccessStatus(displayName: source.displayName)
                 existingSource.availability = source.availability
                 existingSource.capabilities = source.capabilities
                 if existingSource.bookmarkData == nil {
@@ -184,19 +298,22 @@ final class SourceLibrary: ObservableObject, SourceScanSessionHosting, SourcePer
         } else {
             var resolvedSource = source
             resolvedSource.accessDescriptor = sourceAccessMethod.accessDescriptor(for: resolvedSource)
+            resolvedSource.providerID = resolvedSource.accessDescriptor.accessorIdentifier
+            resolvedSource.edition = source.edition
+            resolvedSource.accessStatus = resolvedSource.origin.defaultAccessStatus(displayName: resolvedSource.displayName)
             resolvedSource.capabilities = resolvedSource.origin.defaultCapabilities
             sources.append(resolvedSource)
             sources.sort { $0.displayName.localizedStandardCompare($1.displayName) == .orderedAscending }
         }
 
         if shouldPersist {
-            persistSourceIfAvailable(withID: source.id)
+            persistSourceIfAvailable(withID: existingSourceID(matching: source.id) ?? source.id)
         }
         if shouldScan {
-            startScan(for: source.id, mode: .fullScan)
+            startScan(for: existingSourceID(matching: source.id) ?? source.id, mode: .fullScan)
         }
 
-        return source.id
+        return existingSourceID(matching: source.id) ?? source.id
     }
 
     func source(withID sourceID: URL) -> MinecraftSource? {
@@ -211,6 +328,42 @@ final class SourceLibrary: ObservableObject, SourceScanSessionHosting, SourcePer
         startScan(for: sourceID, mode: .fullScan)
     }
 
+    func discoverSourceCandidates() {
+        candidateDiscoveryTask?.cancel()
+        isDiscoveringSourceCandidates = true
+        sourceCandidates.removeAll { candidateAlreadyAdded($0) }
+
+        let task = Task { [weak self] in
+            guard let self else {
+                return
+            }
+
+            defer {
+                self.isDiscoveringSourceCandidates = false
+                self.candidateDiscoveryTask = nil
+            }
+
+            do {
+                for try await event in self.sourceAccessMethod.discoverSourceCandidates() {
+                    guard !Task.isCancelled else {
+                        return
+                    }
+
+                    switch event {
+                    case .candidate(let candidate):
+                        self.recordSourceCandidate(candidate)
+                    case .stageUpdated, .warning:
+                        break
+                    }
+                }
+            } catch {
+                return
+            }
+        }
+
+        candidateDiscoveryTask = task
+    }
+
     func listContents(for item: MinecraftContentItem, in source: MinecraftSource) async throws -> [DirectoryEntry] {
         try await sourceAccessMethod.listItemContents(for: item, in: source)
     }
@@ -251,143 +404,6 @@ final class SourceLibrary: ObservableObject, SourceScanSessionHosting, SourcePer
         }
     }
 
-    func installPackages(at packageURLs: [URL], into sourceID: URL) async throws -> [InstalledContentItem] {
-        guard
-            let destinationSource = source(withID: sourceID),
-            destinationSource.availability == .available,
-            destinationSource.capabilities.canInstallItems
-        else {
-            throw SourceAccessError.accessFailed(reason: "This source is not currently available for installation.")
-        }
-        guard !packageURLs.isEmpty else {
-            return []
-        }
-
-        scanTasks[sourceID]?.cancel()
-        installationStateBySourceID[sourceID] = SourceInstallationState(
-            completedCount: 0,
-            totalCount: packageURLs.count,
-            status: "Preparing import..."
-        )
-
-        var plans: [InstallationPlan] = []
-        var installedItems: [InstalledContentItem] = []
-        var totalPayloadCount = 0
-        do {
-            for packageURL in packageURLs {
-                let plan = try await Task.detached(priority: .userInitiated) {
-                    let accessedSecurityScope = packageURL.startAccessingSecurityScopedResource()
-                    defer {
-                        if accessedSecurityScope {
-                            packageURL.stopAccessingSecurityScopedResource()
-                        }
-                    }
-                    return try MinecraftPackageInstaller.preparePackage(at: packageURL)
-                }.value
-                plans.append(plan)
-            }
-
-            let payloads = plans.flatMap(\.payloads)
-            totalPayloadCount = payloads.count
-            try validatePackConflicts(payloads, destinationSource: destinationSource)
-            installationStateBySourceID[sourceID] = SourceInstallationState(
-                completedCount: 0,
-                totalCount: payloads.count,
-                status: payloads.count == 1 ? "Installing item..." : "Installing \(payloads.count) items..."
-            )
-
-            for payload in payloads {
-                guard let currentDestination = source(withID: sourceID) else {
-                    throw SourceAccessError.accessFailed(reason: "The destination source was removed during installation.")
-                }
-                let installedItem = try await sourceAccessMethod.install(payload, in: currentDestination)
-                installedItems.append(installedItem)
-                installationStateBySourceID[sourceID] = SourceInstallationState(
-                    completedCount: installedItems.count,
-                    totalCount: payloads.count,
-                    status: "Installed \(installedItems.count) of \(payloads.count)..."
-                )
-            }
-
-            plans.forEach { $0.cleanup() }
-            installationStateBySourceID[sourceID] = nil
-            startScan(for: sourceID, mode: .fullScan)
-            return installedItems
-        } catch {
-            plans.forEach { $0.cleanup() }
-            installationStateBySourceID[sourceID] = nil
-            if !installedItems.isEmpty {
-                startScan(for: sourceID, mode: .fullScan)
-                throw MinecraftPackageInstaller.InstallError.partialInstallation(
-                    completed: installedItems.count,
-                    total: totalPayloadCount,
-                    reason: error.localizedDescription
-                )
-            }
-            throw error
-        }
-    }
-
-    func copyItem(
-        _ item: MinecraftContentItem,
-        from sourceID: URL,
-        into destinationSourceID: URL
-    ) async throws -> [InstalledContentItem] {
-        guard let source = source(withID: sourceID) else {
-            throw SourceAccessError.accessFailed(reason: "The source item is no longer available.")
-        }
-
-        let representation = try await externalRepresentation(
-            for: item,
-            in: source,
-            preferredKind: .portablePackage
-        )
-        defer {
-            if representation.isTemporary {
-                try? FileManager.default.removeItem(at: representation.url)
-            }
-        }
-        return try await installPackages(at: [representation.url], into: destinationSourceID)
-    }
-
-    private func validatePackConflicts(
-        _ payloads: [InstallationPayload],
-        destinationSource: MinecraftSource
-    ) throws {
-        var existingIdentities = Set(
-            destinationSource.rawItems.compactMap { item -> String? in
-                guard
-                    item.contentType == .behaviorPack ||
-                    item.contentType == .resourcePack ||
-                    item.contentType == .skinPack,
-                    let uuid = item.packUUID?.lowercased()
-                else {
-                    return nil
-                }
-                return "\(item.contentType.rawValue)::\(uuid)"
-            }
-        )
-
-        for payload in payloads {
-            guard
-                payload.contentType == .behaviorPack ||
-                payload.contentType == .resourcePack ||
-                payload.contentType == .skinPack,
-                let uuid = payload.packUUID?.lowercased()
-            else {
-                continue
-            }
-            let identity = "\(payload.contentType.rawValue)::\(uuid)"
-            guard !existingIdentities.contains(identity) else {
-                throw MinecraftPackageInstaller.InstallError.duplicatePack(
-                    name: payload.displayName,
-                    version: payload.packVersion
-                )
-            }
-            existingIdentities.insert(identity)
-        }
-    }
-
     func removeSource(withID sourceID: URL) {
         let removedSource = source(withID: sourceID)
         scanTasks[sourceID]?.cancel()
@@ -458,6 +474,7 @@ final class SourceLibrary: ObservableObject, SourceScanSessionHosting, SourcePer
             source.worldPackRelationships = index.worldPackRelationships
             source.displayItems = index.displayItems
             source.displayItemCountsByType = index.displayItemCountsByType
+            source.displayItemCountsByKind = index.displayItemCountsByKind
         }
     }
 
@@ -500,6 +517,7 @@ final class SourceLibrary: ObservableObject, SourceScanSessionHosting, SourcePer
         updateSource(sourceID) { source in
             source.displayItems = snapshot.displayItems
             source.displayItemCountsByType = snapshot.displayItemCountsByType
+            source.displayItemCountsByKind = snapshot.displayItemCountsByKind
             source.rawItems = snapshot.rawItems
             source.logicalPacks = snapshot.logicalPacks
             source.logicalWorlds = snapshot.logicalWorlds
@@ -570,8 +588,13 @@ final class SourceLibrary: ObservableObject, SourceScanSessionHosting, SourcePer
         await ConnectedDeviceRuntime.refreshDevices(on: self, using: connectedDeviceAccessMethod)
     }
 
-    func currentCollectionSnapshots(for sourceURL: URL) -> [CollectionSnapshot] {
-        WorldScanner.collectionSnapshots(in: sourceURL)
+    func currentCollectionSnapshots(for sourceURL: URL, edition: MinecraftEdition) -> [CollectionSnapshot] {
+        switch edition {
+        case .bedrock:
+            return WorldScanner.collectionSnapshots(in: sourceURL)
+        case .java:
+            return JavaContentScanner.collectionSnapshots(in: sourceURL)
+        }
     }
 
     func connectedDeviceDisplayName(for device: ConnectedDevice, container: DeviceAppContainer) -> String {
@@ -661,6 +684,54 @@ final class SourceLibrary: ObservableObject, SourceScanSessionHosting, SourcePer
             }
         }
         sourceIDByItemID = itemIndex
+        sourceCandidates.removeAll { candidateAlreadyAdded($0) }
+    }
+
+    private func recordSourceCandidate(_ candidate: SourceCandidate) {
+        guard !candidateAlreadyAdded(candidate) else {
+            return
+        }
+
+        if let existingIndex = sourceCandidates.firstIndex(where: { $0.id == candidate.id }) {
+            if candidate.confidence > sourceCandidates[existingIndex].confidence {
+                sourceCandidates[existingIndex] = candidate
+            }
+        } else {
+            sourceCandidates.append(candidate)
+        }
+
+        sourceCandidates.sort {
+            if $0.confidence != $1.confidence {
+                return $0.confidence > $1.confidence
+            }
+
+            return $0.displayName.localizedStandardCompare($1.displayName) == .orderedAscending
+        }
+    }
+
+    private func candidateAlreadyAdded(_ candidate: SourceCandidate) -> Bool {
+        sources.contains { source in
+            sourceIdentityKey(for: source.id) == sourceIdentityKey(for: candidate.sourceRootURL)
+                || sourceIdentityKey(for: source.folderURL) == sourceIdentityKey(for: candidate.sourceRootURL)
+        }
+    }
+
+    private func existingSourceID(matching url: URL) -> URL? {
+        let identity = sourceIdentityKey(for: url)
+        return sources.first { source in
+            sourceIdentityKey(for: source.id) == identity
+                || sourceIdentityKey(for: source.folderURL) == identity
+        }?.id
+    }
+
+    private func removeSourceCandidates(matching candidate: SourceCandidate, sourceID: URL) {
+        let candidateIdentity = sourceIdentityKey(for: candidate.sourceRootURL)
+        let sourceIdentity = sourceIdentityKey(for: sourceID)
+        sourceCandidates.removeAll {
+            $0.id == candidate.id
+                || sourceIdentityKey(for: $0.sourceRootURL) == candidateIdentity
+                || sourceIdentityKey(for: $0.sourceRootURL) == sourceIdentity
+        }
     }
 
     @discardableResult

World Manager for Minecraft/Services/Sources/Core/SourcePresentation.swift

@@ -120,8 +120,7 @@ enum SourcePresentation {
         case .discovering, .metadata, .previews:
             return "Loading previews for \(source.previewLoadedCount) of \(source.indexedItemCount) items..."
         case .sizing:
-            let remainingCount = max(source.indexedItemCount - source.sizeLoadedCount, 0)
-            return "Calculating sizes for \(remainingCount) of \(source.indexedItemCount) items..."
+            return "Calculating sizes for \(source.sizeLoadedCount) of \(source.indexedItemCount) items..."
         case .completed:
             return source.indexedItemCount == 0 ? "No Minecraft items found." : "Loaded \(source.indexedDetailCount) items."
         case .idle:

World Manager for Minecraft/Services/Sources/Local/SourceLocalRuntime.swift

@@ -12,7 +12,7 @@ protocol LocalSourceRuntimeHosting: AnyObject {
     func source(withID sourceID: URL) -> MinecraftSource?
     func updateAvailability(for sourceID: URL, to newAvailability: SourceAvailability) -> (previous: SourceAvailability, becameAvailable: Bool)
     func queueAutomaticSync(for sourceID: URL, reason: String, debounce: TimeInterval?)
-    func currentCollectionSnapshots(for sourceURL: URL) -> [CollectionSnapshot]
+    func currentCollectionSnapshots(for sourceURL: URL, edition: MinecraftEdition) -> [CollectionSnapshot]
 }
 
 enum LocalSourceRuntime {
@@ -86,7 +86,7 @@ enum LocalSourceRuntime {
 
             if SourceRestoration.needsReconcile(
                 refreshedSource,
-                currentCollectionSnapshots: host.currentCollectionSnapshots(for:)
+                currentCollectionSnapshots: host.currentCollectionSnapshots(for:edition:)
             ) {
                 host.queueAutomaticSync(
                     for: sourceID,

World Manager for Minecraft/Services/Sources/Persistence/SourcePersistenceCoordinator.swift

@@ -15,7 +15,7 @@ protocol SourcePersistenceHosting: AnyObject {
     func refreshConnectedDevices() async
     func refreshLocalSources() async
     func queueAutomaticSync(for sourceID: URL, reason: String, debounce: TimeInterval?)
-    func currentCollectionSnapshots(for sourceURL: URL) -> [CollectionSnapshot]
+    func currentCollectionSnapshots(for sourceURL: URL, edition: MinecraftEdition) -> [CollectionSnapshot]
     func connectedDeviceDisplayName(for device: ConnectedDevice, container: DeviceAppContainer) -> String
 }
 
@@ -125,7 +125,7 @@ enum SourcePersistenceCoordinator {
             if let refreshReason = SourceRestoration.startupRefreshReason(
                 for: source,
                 persistedRecord: persistedRecordsByID[source.id],
-                currentCollectionSnapshots: host.currentCollectionSnapshots(for:)
+                currentCollectionSnapshots: host.currentCollectionSnapshots(for:edition:)
             ) {
                 host.queueAutomaticSync(for: source.id, reason: refreshReason, debounce: nil)
             }

World Manager for Minecraft/Services/Sources/Persistence/SourceRestoration.swift

@@ -16,6 +16,8 @@ enum SourceRestoration {
             accessDescriptor: record.accessDescriptor,
             availability: record.availability
         )
+        source.providerID = record.accessDescriptor.accessorIdentifier
+        source.edition = edition(for: record.accessDescriptor, origin: record.origin)
 
         if case .connectedDevice(let device, let container) = source.origin {
             var repairedDevice = device
@@ -56,6 +58,9 @@ enum SourceRestoration {
         source.displayItemCountsByType = items.reduce(into: [MinecraftContentType: Int]()) { counts, item in
             counts[item.contentType, default: 0] += 1
         }
+        source.displayItemCountsByKind = items.reduce(into: [MinecraftContentKind: Int]()) { counts, item in
+            counts[item.contentKind, default: 0] += 1
+        }
         source.indexedItemCount = items.count
         source.indexedDetailCount = items.filter(\.metadataLoaded).count
         source.previewLoadedCount = items.filter(\.previewLoaded).count
@@ -101,7 +106,7 @@ enum SourceRestoration {
     static func startupRefreshReason(
         for source: MinecraftSource,
         persistedRecord: PersistedSourceRecord?,
-        currentCollectionSnapshots: (URL) -> [CollectionSnapshot]
+        currentCollectionSnapshots: (URL, MinecraftEdition) -> [CollectionSnapshot]
     ) -> String? {
         guard source.availability == .available else {
             return nil
@@ -130,7 +135,7 @@ enum SourceRestoration {
 
     static func needsReconcile(
         _ source: MinecraftSource,
-        currentCollectionSnapshots: (URL) -> [CollectionSnapshot]
+        currentCollectionSnapshots: (URL, MinecraftEdition) -> [CollectionSnapshot]
     ) -> Bool {
         reconcileIsNeeded(source, currentCollectionSnapshots: currentCollectionSnapshots)
     }
@@ -149,7 +154,7 @@ enum SourceRestoration {
 
     private static func needsRescan(
         _ record: PersistedSourceRecord,
-        currentCollectionSnapshots: (URL) -> [CollectionSnapshot]
+        currentCollectionSnapshots: (URL, MinecraftEdition) -> [CollectionSnapshot]
     ) -> Bool {
         guard record.accessDescriptor.refreshStrategy == .eagerFullScan else {
             return record.rawItems.isEmpty
@@ -164,15 +169,16 @@ enum SourceRestoration {
             return true
         }
 
+        let edition = edition(for: record.accessDescriptor, origin: record.origin)
         return collectionsDiffer(
-            currentCollectionSnapshots(sourceURL),
+            currentCollectionSnapshots(sourceURL, edition),
             persistedCollections: snapshot.collectionSnapshots
         )
     }
 
     private static func reconcileIsNeeded(
         _ source: MinecraftSource,
-        currentCollectionSnapshots: (URL) -> [CollectionSnapshot]
+        currentCollectionSnapshots: (URL, MinecraftEdition) -> [CollectionSnapshot]
     ) -> Bool {
         guard source.accessDescriptor.refreshStrategy == .eagerFullScan else {
             return source.rawItems.isEmpty
@@ -188,29 +194,38 @@ enum SourceRestoration {
         }
 
         return collectionsDiffer(
-            currentCollectionSnapshots(sourceURL),
+            currentCollectionSnapshots(sourceURL, source.edition),
             persistedCollections: snapshot.collectionSnapshots
         )
     }
 
+    private static func edition(
+        for accessDescriptor: SourceAccessDescriptor,
+        origin: MinecraftSourceOrigin
+    ) -> MinecraftEdition {
+        if accessDescriptor.accessorIdentifier == JavaLocalFolderSourceAccess().accessorIdentifier {
+            return .java
+        }
+
+        return origin.defaultEdition
+    }
+
     private static func collectionsDiffer(
         _ currentCollections: [CollectionSnapshot],
         persistedCollections: [CollectionSnapshot]
     ) -> Bool {
-        let currentCollectionsByName = Dictionary(
-            uniqueKeysWithValues: currentCollections.map { ($0.folderName, $0) }
-        )
-        let persistedCollectionsByName = Dictionary(
-            uniqueKeysWithValues: persistedCollections.map { ($0.folderName, $0) }
-        )
+        let currentCollectionsByName = Dictionary(grouping: currentCollections, by: \.folderName)
+            .mapValues { $0.map(\.fingerprint).sorted() }
+        let persistedCollectionsByName = Dictionary(grouping: persistedCollections, by: \.folderName)
+            .mapValues { $0.map(\.fingerprint).sorted() }
 
         if currentCollectionsByName.count != persistedCollectionsByName.count {
             return true
         }
 
-        for (folderName, persistedCollection) in persistedCollectionsByName {
-            guard let currentCollection = currentCollectionsByName[folderName],
-                  currentCollection.fingerprint == persistedCollection.fingerprint else {
+        for (folderName, persistedFingerprints) in persistedCollectionsByName {
+            guard let currentFingerprints = currentCollectionsByName[folderName],
+                  currentFingerprints == persistedFingerprints else {
                 return true
             }
         }

World Manager for Minecraft/Services/Sources/Scanning/SourceContentIndex.swift

@@ -11,6 +11,7 @@ struct SourceContentIndex {
     let worldPackRelationships: [WorldPackRelationship]
     let displayItems: [MinecraftContentItem]
     let displayItemCountsByType: [MinecraftContentType: Int]
+    let displayItemCountsByKind: [MinecraftContentKind: Int]
 }
 
 enum SourceContentIndexer {
@@ -171,7 +172,8 @@ enum SourceContentIndexer {
             packInstances: sortedPackInstances,
             worldPackRelationships: worldRelationships,
             displayItems: displayItems,
-            displayItemCountsByType: displayItemCounts(for: displayItems)
+            displayItemCountsByType: displayItemCounts(for: displayItems),
+            displayItemCountsByKind: displayItemKindCounts(for: displayItems)
         )
     }
 
@@ -219,6 +221,12 @@ enum SourceContentIndexer {
         }
     }
 
+    private static func displayItemKindCounts(for items: [MinecraftContentItem]) -> [MinecraftContentKind: Int] {
+        items.reduce(into: [MinecraftContentKind: Int]()) { counts, item in
+            counts[item.contentKind, default: 0] += 1
+        }
+    }
+
     private static func shouldPreferPackItem(_ candidate: MinecraftContentItem, over existing: MinecraftContentItem) -> Bool {
         let candidateEmbedded = isEmbeddedWorldPack(candidate)
         let existingEmbedded = isEmbeddedWorldPack(existing)

World Manager for Minecraft/Services/Sources/Scanning/SourceScanExecution.swift

@@ -50,9 +50,10 @@ enum SourceScanExecutor {
         host.updateSource(sourceID) { source in
             source.accessDescriptor = sourceAccessMethod.accessDescriptor(for: source)
         }
-        let currentAvailability = await sourceAccessMethod.availability(for: source)
+        let currentAccessStatus = await sourceAccessMethod.accessStatus(for: source)
         host.updateSource(sourceID) { source in
-            source.availability = currentAvailability
+            source.accessStatus = currentAccessStatus
+            source.availability = currentAccessStatus.availability
         }
 
         let scanContextURL = source.folderURL
@@ -89,22 +90,7 @@ enum SourceScanExecutor {
                     }
                 }
             }
-            let discoveryStream = AsyncThrowingStream<MinecraftContentItem, Error> { continuation in
-                let discoveryTask = Task.detached(priority: .userInitiated) {
-                    do {
-                        try await sourceAccessMethod.discoverItems(for: source, mode: mode) { item in
-                            continuation.yield(item)
-                        }
-                        continuation.finish()
-                    } catch {
-                        continuation.finish(throwing: error)
-                    }
-                }
-
-                continuation.onTermination = { @Sendable _ in
-                    discoveryTask.cancel()
-                }
-            }
+            let providerEventStream = sourceAccessMethod.scanEvents(for: source, mode: mode)
 
             let previousItemsByID = Dictionary(uniqueKeysWithValues: previousSource.rawItems.map { ($0.id, $0) })
             let previousSnapshotByItemID = Dictionary(
@@ -116,35 +102,61 @@ enum SourceScanExecutor {
             var discoveredCollectionNames = Set<String>()
             let discoveryStartTime = Date()
 
-            for try await item in discoveryStream {
+            for try await event in providerEventStream {
                 guard !Task.isCancelled else {
                     break
                 }
 
-                discoveredCount += 1
-                discoveredCollectionNames.insert(item.collectionRootURL.lastPathComponent)
-                let itemForIndex: MinecraftContentItem
-                if shouldReconcileFromCache,
-                   let cachedItem = previousItemsByID[item.id],
-                   SourceScanPolicy.shouldReuseCachedItem(
-                    cachedItem,
-                    forDiscoveredItem: item,
-                    source: source,
-                    previousSnapshot: previousSnapshotByItemID[item.id]
-                   ) {
-                    itemForIndex = cachedItem
-                } else {
-                    itemForIndex = item
-                }
+                switch event {
+                case .accessStatusChanged(let accessStatus):
+                    host.updateSource(sourceID) { source in
+                        source.accessStatus = accessStatus
+                        source.availability = accessStatus.availability
+                    }
+                    continue
+                case .stageUpdated(let stage):
+                    host.updateSource(sourceID) { source in
+                        source.scanStatus = stage.detail ?? stage.title
+                    }
+                    continue
+                case .warning(let warning):
+                    host.updateSource(sourceID) { source in
+                        source.scanDiagnostic = warning.detail ?? warning.message
+                    }
+                    continue
+                case .inspected(let inspectedItem):
+                    if let snapshot = await index.applyEnrichedItem(inspectedItem) {
+                        await MainActor.run {
+                            host.applySnapshot(snapshot, to: sourceID)
+                        }
+                    }
+                    continue
+                case .discovered(let item):
+                    discoveredCount += 1
+                    discoveredCollectionNames.insert(item.collectionRootURL.lastPathComponent)
+                    let itemForIndex: MinecraftContentItem
+                    if shouldReconcileFromCache,
+                       let cachedItem = previousItemsByID[item.id],
+                       SourceScanPolicy.shouldReuseCachedItem(
+                        cachedItem,
+                        forDiscoveredItem: item,
+                        source: source,
+                        previousSnapshot: previousSnapshotByItemID[item.id]
+                       ) {
+                        itemForIndex = cachedItem
+                    } else {
+                        itemForIndex = item
+                    }
 
-                if let snapshot = await index.addDiscoveredItem(
-                    itemForIndex,
-                    discoveredCount: discoveredCount
-                ) {
-                    host.applySnapshot(snapshot, to: sourceID)
-                }
-                if itemForIndex.id == item.id, itemForIndex.metadataLoaded == false {
-                    await enrichmentQueue.enqueue(item)
+                    if let snapshot = await index.addDiscoveredItem(
+                        itemForIndex,
+                        discoveredCount: discoveredCount
+                    ) {
+                        host.applySnapshot(snapshot, to: sourceID)
+                    }
+                    if itemForIndex.id == item.id, itemForIndex.metadataLoaded == false {
+                        await enrichmentQueue.enqueue(item)
+                    }
                 }
             }
 
@@ -227,6 +239,23 @@ enum SourceScanExecutor {
             }
             host.persistSourceIfAvailable(withID: sourceID)
 
+            if source.origin.kind == .connectedDevice {
+                try await finishConnectedDeviceScan(
+                    sourceID: sourceID,
+                    source: source,
+                    host: host,
+                    sourceAccessMethod: sourceAccessMethod,
+                    notificationService: notificationService,
+                    index: index,
+                    discoveredCount: discoveredCount,
+                    scanStartTime: scanStartTime,
+                    scanContextURL: scanContextURL,
+                    performanceContext: performanceContext,
+                    minimumVisibleScanDuration: minimumVisibleScanDuration
+                )
+                return
+            }
+
             let sizeQueue = EnrichmentWorkQueue()
             sizeWorkerTasks = (0..<resolvedSizeWorkerCount).map { _ in
                 Task.detached(priority: .utility) {
@@ -305,6 +334,52 @@ enum SourceScanExecutor {
         }
     }
 
+    private static func finishConnectedDeviceScan(
+        sourceID: URL,
+        source: MinecraftSource,
+        host: SourceScanSessionHosting,
+        sourceAccessMethod: SourceAccessMethod,
+        notificationService: ScanNotificationServicing,
+        index: SourceIndexActor,
+        discoveredCount: Int,
+        scanStartTime: Date,
+        scanContextURL: URL,
+        performanceContext: String,
+        minimumVisibleScanDuration: TimeInterval
+    ) async throws {
+        let sizeStageStartTime = Date()
+        let sizeSeedItems = await index.currentItems()
+        let sizedItems = await sourceAccessMethod.loadSizeAssets(
+            for: sizeSeedItems.filter { !$0.sizeLoaded },
+            in: source
+        )
+        for sizedItem in sizedItems {
+            if let snapshot = await index.applySizedItem(sizedItem) {
+                host.applySnapshot(snapshot, to: sourceID)
+            }
+        }
+
+        host.logScanStage(
+            "Size",
+            elapsed: Date().timeIntervalSince(sizeStageStartTime),
+            context: performanceContext,
+            itemCount: discoveredCount
+        )
+
+        try await finishScan(
+            sourceID: sourceID,
+            source: source,
+            host: host,
+            notificationService: notificationService,
+            index: index,
+            discoveredCount: discoveredCount,
+            scanStartTime: scanStartTime,
+            scanContextURL: scanContextURL,
+            performanceContext: performanceContext,
+            minimumVisibleScanDuration: minimumVisibleScanDuration
+        )
+    }
+
     private static func finishScan(
         sourceID: URL,
         source: MinecraftSource,
@@ -401,6 +476,7 @@ private actor EnrichmentWorkQueue {
 struct SourceIndexSnapshot {
     let displayItems: [MinecraftContentItem]
     let displayItemCountsByType: [MinecraftContentType: Int]
+    let displayItemCountsByKind: [MinecraftContentKind: Int]
     let rawItems: [MinecraftContentItem]
     let logicalPacks: [LogicalPack]
     let logicalWorlds: [LogicalWorld]
@@ -568,6 +644,9 @@ private actor SourceIndexActor {
         let displayItemCountsByType = dedupedDisplayItems.reduce(into: [MinecraftContentType: Int]()) { counts, item in
             counts[item.contentType, default: 0] += 1
         }
+        let displayItemCountsByKind = dedupedDisplayItems.reduce(into: [MinecraftContentKind: Int]()) { counts, item in
+            counts[item.contentKind, default: 0] += 1
+        }
         let metadataFraction = progressFraction(completed: indexedDetailCount, total: indexedItemCount)
         let previewFraction = progressFraction(completed: previewLoadedCount, total: indexedItemCount)
         let sizeFraction = progressFraction(completed: sizeLoadedCount, total: indexedItemCount)
@@ -589,6 +668,7 @@ private actor SourceIndexActor {
             return SourceIndexSnapshot(
                 displayItems: dedupedDisplayItems,
                 displayItemCountsByType: displayItemCountsByType,
+                displayItemCountsByKind: displayItemCountsByKind,
                 rawItems: rawItems,
                 logicalPacks: logicalPacks,
                 logicalWorlds: [],
@@ -617,6 +697,7 @@ private actor SourceIndexActor {
             return SourceIndexSnapshot(
                 displayItems: dedupedDisplayItems,
                 displayItemCountsByType: displayItemCountsByType,
+                displayItemCountsByKind: displayItemCountsByKind,
                 rawItems: rawItems,
                 logicalPacks: logicalPacks,
                 logicalWorlds: [],
@@ -649,6 +730,7 @@ private actor SourceIndexActor {
             return SourceIndexSnapshot(
                 displayItems: dedupedDisplayItems,
                 displayItemCountsByType: displayItemCountsByType,
+                displayItemCountsByKind: displayItemCountsByKind,
                 rawItems: rawItems,
                 logicalPacks: logicalPacks,
                 logicalWorlds: [],
@@ -750,8 +832,7 @@ private actor SourceIndexActor {
             } else if sizeLoadedCount == 0 {
                 scanStatus = "Preparing size calculations..."
             } else {
-                let remainingCount = max(indexedItemCount - sizeLoadedCount, 0)
-                scanStatus = "Calculating sizes for \(remainingCount) of \(indexedItemCount) items..."
+                scanStatus = "Calculating sizes for \(sizeLoadedCount) of \(indexedItemCount) items..."
             }
         } else {
             scanStatus = indexedItemCount == 0
@@ -762,6 +843,7 @@ private actor SourceIndexActor {
         return SourceIndexSnapshot(
             displayItems: dedupedDisplayItems,
             displayItemCountsByType: displayItemCountsByType,
+            displayItemCountsByKind: displayItemCountsByKind,
             rawItems: rawItems,
             logicalPacks: logicalPacks,
             logicalWorlds: logicalWorlds,

World Manager for Minecraft/Services/Sources/Scanning/SourceScanning.swift

@@ -6,9 +6,9 @@ import Foundation
 enum SourceScanPolicy {
     static func initialStatus(for source: MinecraftSource, mode: SourceDiscoveryMode) -> String {
         switch (source.origin, mode) {
-        case (.localFolder, .fullScan):
+        case (.localFolder, .fullScan), (.javaLocalFolder, .fullScan):
             return "Preparing folder scan..."
-        case (.localFolder, .reconcile):
+        case (.localFolder, .reconcile), (.javaLocalFolder, .reconcile):
             return "Preparing cached library refresh..."
         case (.connectedDevice, .fullScan):
             return "Connecting to device and discovering Minecraft items..."
@@ -19,9 +19,9 @@ enum SourceScanPolicy {
 
     static func scanningLibraryStatus(for source: MinecraftSource, mode: SourceDiscoveryMode) -> String {
         switch (source.origin, mode) {
-        case (.localFolder, .fullScan):
+        case (.localFolder, .fullScan), (.javaLocalFolder, .fullScan):
             return "Scanning Minecraft library..."
-        case (.localFolder, .reconcile):
+        case (.localFolder, .reconcile), (.javaLocalFolder, .reconcile):
             return "Reconciling cached library..."
         case (.connectedDevice, .fullScan):
             return "Scanning Minecraft library on device..."
@@ -32,7 +32,7 @@ enum SourceScanPolicy {
 
     static func performanceContext(for source: MinecraftSource) -> String {
         switch source.origin {
-        case .localFolder:
+        case .localFolder, .javaLocalFolder:
             return "source=\(source.displayName) kind=local"
         case .connectedDevice(let device, let container):
             let transport = device.connection == .usb ? "usb" : "network"
@@ -121,7 +121,13 @@ enum SourceScanPolicy {
     }
 
     static func buildSnapshot(for source: MinecraftSource, scanRootURL: URL) -> SourceSnapshot {
-        let collectionSnapshots = WorldScanner.collectionSnapshots(in: scanRootURL)
+        let collectionSnapshots: [CollectionSnapshot]
+        switch source.edition {
+        case .bedrock:
+            collectionSnapshots = WorldScanner.collectionSnapshots(in: scanRootURL)
+        case .java:
+            collectionSnapshots = JavaContentScanner.collectionSnapshots(in: scanRootURL)
+        }
 
         let itemSnapshots = source.rawItems.map { item in
             ItemSnapshot(
@@ -153,6 +159,7 @@ enum SourceScanRecovery {
     static func restoreIndexedState(from previousSource: MinecraftSource, into source: inout MinecraftSource) {
         source.displayItems = previousSource.displayItems
         source.displayItemCountsByType = previousSource.displayItemCountsByType
+        source.displayItemCountsByKind = previousSource.displayItemCountsByKind
         source.rawItems = previousSource.rawItems
         source.logicalPacks = previousSource.logicalPacks
         source.logicalWorlds = previousSource.logicalWorlds

World Manager for Minecraft/SourceAccess/ConnectedDevice/AppleMobileDevice/AppleMobileDeviceAccess.swift

@@ -177,37 +177,6 @@ enum AppleMobileDeviceAccess {
         }
     }
 
-    static func installDirectory(
-        deviceIdentifier: String,
-        bundleIdentifier: String,
-        minecraftRootRelativePath: String,
-        collectionFolderName: String,
-        preferredDestinationName: String,
-        sourceDirectoryURL: URL
-    ) async throws -> String {
-        try await AppleMobileDeviceOperationLimiter.shared.run(for: deviceIdentifier) {
-            try await Task.detached(priority: .userInitiated) {
-                var error: NSError?
-                guard let installedName = WMMInstallLocalDirectoryInConnectedDeviceApp(
-                    deviceIdentifier,
-                    bundleIdentifier,
-                    minecraftRootRelativePath,
-                    collectionFolderName,
-                    preferredDestinationName,
-                    sourceDirectoryURL,
-                    &error
-                ) else {
-                    throw error ?? NSError(
-                        domain: "AppleMobileDeviceAccess",
-                        code: 16,
-                        userInfo: [NSLocalizedDescriptionKey: "The MobileDevice content installation failed."]
-                    )
-                }
-                return installedName
-            }.value
-        }
-    }
-
     static func listApplications(deviceIdentifier: String) async throws -> [AppleMobileDeviceApplicationSummary] {
         try await AppleMobileDeviceOperationLimiter.shared.run(for: deviceIdentifier) {
             try await Task.detached(priority: .userInitiated) {

World Manager for Minecraft/SourceAccess/ConnectedDevice/AppleMobileDevice/AppleMobileDeviceBridge.h

@@ -98,15 +98,4 @@ WMMCopyConnectedDeviceAppSubtreeToLocalDirectory(
     NSError **error
 );
 
-FOUNDATION_EXPORT NSString * _Nullable
-WMMInstallLocalDirectoryInConnectedDeviceApp(
-    NSString *deviceIdentifier,
-    NSString *bundleIdentifier,
-    NSString *minecraftRootRelativePath,
-    NSString *collectionFolderName,
-    NSString *preferredDestinationName,
-    NSURL *sourceDirectoryURL,
-    NSError **error
-);
-
 NS_ASSUME_NONNULL_END

World Manager for Minecraft/SourceAccess/ConnectedDevice/AppleMobileDevice/AppleMobileDeviceBridge.m

@@ -122,11 +122,7 @@ typedef int (*AFCKeyValueReadFn)(AFCIteratorRef iterator, char **key, char **val
 typedef int (*AFCKeyValueCloseFn)(AFCIteratorRef iterator);
 typedef int (*AFCFileRefOpenFn)(AFCConnectionRef connection, const char *path, uint64_t mode, AFCFileDescriptorRef *fileDescriptor);
 typedef int (*AFCFileRefReadFn)(AFCConnectionRef connection, AFCFileDescriptorRef fileDescriptor, void *buffer, size_t *length);
-typedef int (*AFCFileRefWriteFn)(AFCConnectionRef connection, AFCFileDescriptorRef fileDescriptor, const void *buffer, uint32_t length);
 typedef int (*AFCFileRefCloseFn)(AFCConnectionRef connection, AFCFileDescriptorRef fileDescriptor);
-typedef int (*AFCDirectoryCreateFn)(AFCConnectionRef connection, const char *path);
-typedef int (*AFCRenamePathFn)(AFCConnectionRef connection, const char *sourcePath, const char *destinationPath);
-typedef int (*AFCRemovePathFn)(AFCConnectionRef connection, const char *path);
 
 typedef struct {
     void *handle;
@@ -163,11 +159,7 @@ typedef struct {
     AFCKeyValueCloseFn AFCKeyValueClose;
     AFCFileRefOpenFn AFCFileRefOpen;
     AFCFileRefReadFn AFCFileRefRead;
-    AFCFileRefWriteFn AFCFileRefWrite;
     AFCFileRefCloseFn AFCFileRefClose;
-    AFCDirectoryCreateFn AFCDirectoryCreate;
-    AFCRenamePathFn AFCRenamePath;
-    AFCRemovePathFn AFCRemovePath;
 } WMMMobileDeviceFunctions;
 
 typedef struct {
@@ -245,11 +237,7 @@ static BOOL WMMLoadFunctions(WMMMobileDeviceFunctions *functions, NSError **erro
     functions->AFCKeyValueClose = (AFCKeyValueCloseFn)WMMLoadSymbol(frameworkHandle, "AFCKeyValueClose");
     functions->AFCFileRefOpen = (AFCFileRefOpenFn)WMMLoadSymbol(frameworkHandle, "AFCFileRefOpen");
     functions->AFCFileRefRead = (AFCFileRefReadFn)WMMLoadSymbol(frameworkHandle, "AFCFileRefRead");
-    functions->AFCFileRefWrite = (AFCFileRefWriteFn)WMMLoadSymbol(frameworkHandle, "AFCFileRefWrite");
     functions->AFCFileRefClose = (AFCFileRefCloseFn)WMMLoadSymbol(frameworkHandle, "AFCFileRefClose");
-    functions->AFCDirectoryCreate = (AFCDirectoryCreateFn)WMMLoadSymbol(frameworkHandle, "AFCDirectoryCreate");
-    functions->AFCRenamePath = (AFCRenamePathFn)WMMLoadSymbol(frameworkHandle, "AFCRenamePath");
-    functions->AFCRemovePath = (AFCRemovePathFn)WMMLoadSymbol(frameworkHandle, "AFCRemovePath");
 
     if (functions->AMDeviceNotificationSubscribe == NULL ||
         functions->AMDeviceNotificationUnsubscribe == NULL ||
@@ -1048,163 +1036,6 @@ static BOOL WMMCopyAFCTreeToLocalURL(
     return WMMCopyAFCFileToLocalURL(functions, afcConnection, remotePath, localURL, error);
 }
 
-static BOOL WMMEnsureAFCDirectory(
-    WMMMobileDeviceFunctions *functions,
-    AFCConnectionRef afcConnection,
-    NSString *remotePath,
-    NSError **error
-) {
-    NSMutableArray<NSString *> *existingEntries = nil;
-    if (WMMReadAFCDirectory(functions, afcConnection, remotePath, &existingEntries) == 0) {
-        return YES;
-    }
-
-    const int createStatus = functions->AFCDirectoryCreate(
-        afcConnection,
-        remotePath.fileSystemRepresentation
-    );
-    if (createStatus != 0) {
-        if (error != NULL) {
-            *error = WMMMakeError(
-                createStatus,
-                [NSString stringWithFormat:@"AFCDirectoryCreate failed for %@ (%d).", remotePath, createStatus]
-            );
-        }
-        return NO;
-    }
-    return YES;
-}
-
-static BOOL WMMCopyLocalFileToAFCPath(
-    WMMMobileDeviceFunctions *functions,
-    AFCConnectionRef afcConnection,
-    NSURL *localFileURL,
-    NSString *remotePath,
-    NSError **error
-) {
-    AFCFileDescriptorRef fileDescriptor = NULL;
-    const int openStatus = functions->AFCFileRefOpen(
-        afcConnection,
-        remotePath.fileSystemRepresentation,
-        3,
-        &fileDescriptor
-    );
-    if (openStatus != 0 || fileDescriptor == NULL) {
-        if (error != NULL) {
-            *error = WMMMakeError(
-                openStatus,
-                [NSString stringWithFormat:@"AFCFileRefOpen for writing failed for %@ (%d).", remotePath, openStatus]
-            );
-        }
-        return NO;
-    }
-
-    NSFileHandle *handle = [NSFileHandle fileHandleForReadingFromURL:localFileURL error:error];
-    if (handle == nil) {
-        functions->AFCFileRefClose(afcConnection, fileDescriptor);
-        return NO;
-    }
-
-    BOOL success = YES;
-    while (true) {
-        @autoreleasepool {
-            NSData *chunk = [handle readDataOfLength:64 * 1024];
-            if (chunk.length == 0) {
-                break;
-            }
-            const int writeStatus = functions->AFCFileRefWrite(
-                afcConnection,
-                fileDescriptor,
-                chunk.bytes,
-                (uint32_t)chunk.length
-            );
-            if (writeStatus != 0) {
-                if (error != NULL) {
-                    *error = WMMMakeError(
-                        writeStatus,
-                        [NSString stringWithFormat:@"AFCFileRefWrite failed for %@ (%d).", remotePath, writeStatus]
-                    );
-                }
-                success = NO;
-                break;
-            }
-        }
-    }
-
-    [handle closeFile];
-    functions->AFCFileRefClose(afcConnection, fileDescriptor);
-    return success;
-}
-
-static BOOL WMMCopyLocalTreeToAFCPath(
-    WMMMobileDeviceFunctions *functions,
-    AFCConnectionRef afcConnection,
-    NSURL *localURL,
-    NSString *remotePath,
-    NSError **error
-) {
-    NSNumber *isDirectory = nil;
-    if (![localURL getResourceValue:&isDirectory forKey:NSURLIsDirectoryKey error:error]) {
-        return NO;
-    }
-
-    if (!isDirectory.boolValue) {
-        return WMMCopyLocalFileToAFCPath(functions, afcConnection, localURL, remotePath, error);
-    }
-
-    if (!WMMEnsureAFCDirectory(functions, afcConnection, remotePath, error)) {
-        return NO;
-    }
-
-    NSArray<NSURL *> *children = [[NSFileManager defaultManager] contentsOfDirectoryAtURL:localURL
-                                                              includingPropertiesForKeys:@[NSURLIsDirectoryKey, NSURLIsSymbolicLinkKey]
-                                                                                 options:0
-                                                                                   error:error];
-    if (children == nil) {
-        return NO;
-    }
-
-    for (NSURL *childURL in children) {
-        NSNumber *isSymbolicLink = nil;
-        if (![childURL getResourceValue:&isSymbolicLink forKey:NSURLIsSymbolicLinkKey error:error]) {
-            return NO;
-        }
-        if (isSymbolicLink.boolValue) {
-            if (error != NULL) {
-                *error = WMMMakeError(17, [NSString stringWithFormat:@"Symbolic links cannot be installed: %@", childURL.path]);
-            }
-            return NO;
-        }
-
-        NSString *childRemotePath = [remotePath stringByAppendingPathComponent:childURL.lastPathComponent];
-        if (!WMMCopyLocalTreeToAFCPath(functions, afcConnection, childURL, childRemotePath, error)) {
-            return NO;
-        }
-    }
-    return YES;
-}
-
-static BOOL WMMRemoveAFCTree(
-    WMMMobileDeviceFunctions *functions,
-    AFCConnectionRef afcConnection,
-    NSString *remotePath
-) {
-    NSMutableArray<NSString *> *entries = nil;
-    if (WMMReadAFCDirectory(functions, afcConnection, remotePath, &entries) == 0) {
-        for (NSString *entry in entries) {
-            if ([entry isEqualToString:@"."] || [entry isEqualToString:@".."]) {
-                continue;
-            }
-            WMMRemoveAFCTree(
-                functions,
-                afcConnection,
-                [remotePath stringByAppendingPathComponent:entry]
-            );
-        }
-    }
-    return functions->AFCRemovePath(afcConnection, remotePath.fileSystemRepresentation) == 0;
-}
-
 static NSString *WMMNormalizedAFCPath(NSString *path) {
     NSString *normalizedPath = path.length == 0 ? @"/" : path;
     if (![normalizedPath hasPrefix:@"/"]) {
@@ -2550,122 +2381,3 @@ WMMCopyConnectedDeviceAppSubtreeToLocalDirectory(
 
     return success;
 }
-
-NSString * _Nullable
-WMMInstallLocalDirectoryInConnectedDeviceApp(
-    NSString *deviceIdentifier,
-    NSString *bundleIdentifier,
-    NSString *minecraftRootRelativePath,
-    NSString *collectionFolderName,
-    NSString *preferredDestinationName,
-    NSURL *sourceDirectoryURL,
-    NSError **error
-) {
-    if (bundleIdentifier.length == 0 ||
-        minecraftRootRelativePath.length == 0 ||
-        collectionFolderName.length == 0 ||
-        preferredDestinationName.length == 0 ||
-        sourceDirectoryURL == nil ||
-        !sourceDirectoryURL.isFileURL) {
-        if (error != NULL) {
-            *error = WMMMakeError(16, @"A device, Minecraft path, collection, destination name, and local source directory are required.");
-        }
-        return nil;
-    }
-
-    WMMMobileDeviceFunctions functions;
-    if (!WMMLoadFunctions(&functions, error)) {
-        return nil;
-    }
-    if (functions.AFCFileRefWrite == NULL ||
-        functions.AFCDirectoryCreate == NULL ||
-        functions.AFCRenamePath == NULL ||
-        functions.AFCRemovePath == NULL) {
-        if (error != NULL) {
-            *error = WMMMakeError(17, @"This version of MobileDevice.framework does not provide the required AFC write operations.");
-        }
-        return nil;
-    }
-
-    AMDeviceRef device = WMMCopyConnectedDevice(&functions, deviceIdentifier, error);
-    if (device == NULL) {
-        return nil;
-    }
-    if (!WMMConnectAndValidateDevice(&functions, device, YES, error)) {
-        functions.AMDeviceRelease(device);
-        return nil;
-    }
-
-    AMDServiceConnectionRef backingServiceConnection = NULL;
-    AFCConnectionRef afcConnection = WMMCreateVendAFCConnection(
-        &functions,
-        device,
-        bundleIdentifier,
-        &backingServiceConnection,
-        error
-    );
-    if (afcConnection == NULL) {
-        WMMCloseVendSession(&functions, device, YES, NULL, backingServiceConnection);
-        functions.AMDeviceRelease(device);
-        return nil;
-    }
-
-    NSString *minecraftRoot = WMMNormalizedAFCPath(minecraftRootRelativePath);
-    NSString *stagingRoot = [minecraftRoot stringByAppendingPathComponent:@".world-manager-staging"];
-    NSString *stagedItemPath = [stagingRoot stringByAppendingPathComponent:NSUUID.UUID.UUIDString];
-    NSString *collectionPath = [minecraftRoot stringByAppendingPathComponent:collectionFolderName];
-
-    BOOL success =
-        WMMEnsureAFCDirectory(&functions, afcConnection, stagingRoot, error) &&
-        WMMEnsureAFCDirectory(&functions, afcConnection, stagedItemPath, error) &&
-        WMMCopyLocalTreeToAFCPath(&functions, afcConnection, sourceDirectoryURL, stagedItemPath, error) &&
-        WMMEnsureAFCDirectory(&functions, afcConnection, collectionPath, error);
-
-    NSString *destinationName = nil;
-    if (success) {
-        NSMutableArray<NSString *> *existingEntries = nil;
-        const int listStatus = WMMReadAFCDirectory(&functions, afcConnection, collectionPath, &existingEntries);
-        if (listStatus != 0) {
-            if (error != NULL) {
-                *error = WMMMakeError(
-                    listStatus,
-                    [NSString stringWithFormat:@"Could not list the destination collection %@ (%d).", collectionPath, listStatus]
-                );
-            }
-            success = NO;
-        } else {
-            NSSet<NSString *> *existingNames = [NSSet setWithArray:existingEntries ?: @[]];
-            destinationName = preferredDestinationName;
-            NSUInteger suffix = 2;
-            while ([existingNames containsObject:destinationName]) {
-                destinationName = [NSString stringWithFormat:@"%@-%lu", preferredDestinationName, (unsigned long)suffix];
-                suffix += 1;
-            }
-
-            NSString *destinationPath = [collectionPath stringByAppendingPathComponent:destinationName];
-            const int renameStatus = functions.AFCRenamePath(
-                afcConnection,
-                stagedItemPath.fileSystemRepresentation,
-                destinationPath.fileSystemRepresentation
-            );
-            if (renameStatus != 0) {
-                if (error != NULL) {
-                    *error = WMMMakeError(
-                        renameStatus,
-                        [NSString stringWithFormat:@"AFCRenamePath failed from %@ to %@ (%d).", stagedItemPath, destinationPath, renameStatus]
-                    );
-                }
-                success = NO;
-            }
-        }
-    }
-
-    if (!success) {
-        WMMRemoveAFCTree(&functions, afcConnection, stagedItemPath);
-        destinationName = nil;
-    }
-
-    WMMCloseVendSession(&functions, device, YES, afcConnection, backingServiceConnection);
-    functions.AMDeviceRelease(device);
-    return destinationName;
-}

World Manager for Minecraft/SourceAccess/ConnectedDevice/AppleMobileDevice/AppleMobileDeviceSourceAccess.swift

@@ -18,26 +18,68 @@ struct AppleMobileDeviceSourceAccess: ConnectedDeviceSourceAccessMethod {
     }
 
     nonisolated func availability(for source: MinecraftSource) async -> SourceAvailability {
+        await accessStatus(for: source).availability
+    }
+
+    nonisolated func accessStatus(for source: MinecraftSource) async -> SourceAccessStatus {
         guard case .connectedDevice(let expectedDevice, _) = source.origin else {
-            return .unavailable
+            return SourceAccessStatus(
+                availability: .unavailable,
+                mode: .unknown,
+                displayName: source.displayName,
+                iconSystemName: "iphone.gen3",
+                statusText: "Device source unavailable",
+                warningText: nil
+            )
         }
 
+        let fallbackMode: SourceAccessMode = expectedDevice.connection == .usb ? .usbDevice : .networkDevice
+
         do {
             let devices = try await listConnectedDevices()
             guard let device = devices.first(where: { $0.udid == expectedDevice.udid }) else {
-                return .disconnected
+                return SourceAccessStatus(
+                    availability: .disconnected,
+                    mode: fallbackMode,
+                    displayName: source.displayName,
+                    iconSystemName: "iphone.gen3",
+                    statusText: "Device disconnected",
+                    warningText: nil
+                )
             }
 
+            let mode: SourceAccessMode = device.connection == .usb ? .usbDevice : .networkDevice
+            let availability: SourceAvailability
+            let statusText: String?
             switch device.trustState {
             case .trusted:
-                return .available
+                availability = .available
+                statusText = nil
             case .locked, .untrusted:
-                return .limited
+                availability = .limited
+                statusText = "Unlock and trust the device"
             case .unavailable:
-                return .disconnected
+                availability = .disconnected
+                statusText = "Device unavailable"
             }
+
+            return SourceAccessStatus(
+                availability: availability,
+                mode: mode,
+                displayName: device.name,
+                iconSystemName: "iphone.gen3",
+                statusText: statusText,
+                warningText: nil
+            )
         } catch {
-            return .disconnected
+            return SourceAccessStatus(
+                availability: .disconnected,
+                mode: fallbackMode,
+                displayName: source.displayName,
+                iconSystemName: "iphone.gen3",
+                statusText: "Device status unavailable",
+                warningText: error.localizedDescription
+            )
         }
     }
 
@@ -365,31 +407,6 @@ struct AppleMobileDeviceSourceAccess: ConnectedDeviceSourceAccessMethod {
         }
     }
 
-    nonisolated func install(_ payload: InstallationPayload, in source: MinecraftSource) async throws -> InstalledContentItem {
-        guard case .connectedDevice(_, let container) = source.origin else {
-            throw SourceAccessError.accessFailed(reason: "The selected source is not a connected device.")
-        }
-        let minecraftRoot = container.minecraftFolderRelativePath?
-            .trimmingCharacters(in: .whitespacesAndNewlines) ?? ""
-        guard !minecraftRoot.isEmpty else {
-            throw SourceAccessError.accessFailed(reason: "The connected device is missing its Minecraft content path.")
-        }
-
-        let destinationName = try await AppleMobileDeviceAccess.installDirectory(
-            deviceIdentifier: container.deviceUDID,
-            bundleIdentifier: container.appID,
-            minecraftRootRelativePath: minecraftRoot,
-            collectionFolderName: payload.contentType.collectionFolderName,
-            preferredDestinationName: payload.suggestedFolderName,
-            sourceDirectoryURL: payload.preparedDirectoryURL
-        )
-        return InstalledContentItem(
-            contentType: payload.contentType,
-            displayName: payload.displayName,
-            destinationName: destinationName
-        )
-    }
-
     nonisolated func purgeCachedArtifacts(for source: MinecraftSource) async {
         guard source.origin.kind == .connectedDevice else {
             return

World Manager for Minecraft/SourceAccess/Core/SourceAccessCoordinator.swift

@@ -10,7 +10,10 @@ enum SourceDiscoveryMode: Sendable {
 
 protocol SourceAccessMethod: Sendable {
     nonisolated var accessorIdentifier: SourceAccessorIdentifier { get }
+    nonisolated func probeLocalFolder(_ url: URL) async -> SourceProbeResult?
+    nonisolated func discoverSourceCandidates() -> AsyncThrowingStream<SourceCandidateEvent, Error>
     nonisolated func accessDescriptor(for source: MinecraftSource) -> SourceAccessDescriptor
+    nonisolated func accessStatus(for source: MinecraftSource) async -> SourceAccessStatus
     nonisolated func availability(for source: MinecraftSource) async -> SourceAvailability
     nonisolated func capabilities(for source: MinecraftSource) async -> SourceCapabilities
     nonisolated func discoverItems(
@@ -18,6 +21,10 @@ protocol SourceAccessMethod: Sendable {
         mode: SourceDiscoveryMode,
         onDiscovered: @escaping @Sendable (MinecraftContentItem) -> Void
     ) async throws
+    nonisolated func scanEvents(
+        for source: MinecraftSource,
+        mode: SourceDiscoveryMode
+    ) -> AsyncThrowingStream<ProviderEvent, Error>
     nonisolated func enrich(_ item: MinecraftContentItem, for source: MinecraftSource) async -> MinecraftContentItem
     nonisolated func loadPreviewAssets(for item: MinecraftContentItem, in source: MinecraftSource) async -> MinecraftContentItem
     nonisolated func loadPreviewAssets(for items: [MinecraftContentItem], in source: MinecraftSource) async -> [MinecraftContentItem]
@@ -25,7 +32,6 @@ protocol SourceAccessMethod: Sendable {
     nonisolated func loadSizeAssets(for items: [MinecraftContentItem], in source: MinecraftSource) async -> [MinecraftContentItem]
     nonisolated func listItemContents(for item: MinecraftContentItem, in source: MinecraftSource) async throws -> [DirectoryEntry]
     nonisolated func materializeItem(for item: MinecraftContentItem, in source: MinecraftSource) async throws -> URL
-    nonisolated func install(_ payload: InstallationPayload, in source: MinecraftSource) async throws -> InstalledContentItem
     nonisolated func purgeCachedArtifacts(for source: MinecraftSource) async
 }
 
@@ -34,6 +40,17 @@ extension SourceAccessMethod {
         String(reflecting: Self.self)
     }
 
+    nonisolated func probeLocalFolder(_ url: URL) async -> SourceProbeResult? {
+        _ = url
+        return nil
+    }
+
+    nonisolated func discoverSourceCandidates() -> AsyncThrowingStream<SourceCandidateEvent, Error> {
+        AsyncThrowingStream { continuation in
+            continuation.finish()
+        }
+    }
+
     nonisolated func accessDescriptor(for source: MinecraftSource) -> SourceAccessDescriptor {
         SourceAccessDescriptor(
             accessorIdentifier: accessorIdentifier,
@@ -43,8 +60,13 @@ extension SourceAccessMethod {
     }
 
     nonisolated func availability(for source: MinecraftSource) async -> SourceAvailability {
-        _ = source
-        return .unknown
+        await accessStatus(for: source).availability
+    }
+
+    nonisolated func accessStatus(for source: MinecraftSource) async -> SourceAccessStatus {
+        var status = source.origin.defaultAccessStatus(displayName: source.displayName)
+        status.availability = .unknown
+        return status
     }
 
     nonisolated func capabilities(for source: MinecraftSource) async -> SourceCapabilities {
@@ -61,6 +83,64 @@ extension SourceAccessMethod {
         _ = onDiscovered
     }
 
+    nonisolated func scanEvents(
+        for source: MinecraftSource,
+        mode: SourceDiscoveryMode
+    ) -> AsyncThrowingStream<ProviderEvent, Error> {
+        AsyncThrowingStream { continuation in
+            let task = Task.detached(priority: .userInitiated) {
+                let accessStatus = await accessStatus(for: source)
+                continuation.yield(.accessStatusChanged(accessStatus))
+                continuation.yield(
+                    .stageUpdated(
+                        WorkStage(
+                            id: "discovery",
+                            title: "Discovering content",
+                            detail: nil,
+                            state: .running,
+                            progress: .indeterminate
+                        )
+                    )
+                )
+
+                do {
+                    try await discoverItems(for: source, mode: mode) { item in
+                        continuation.yield(.discovered(item))
+                    }
+                    continuation.yield(
+                        .stageUpdated(
+                            WorkStage(
+                                id: "discovery",
+                                title: "Discovering content",
+                                detail: nil,
+                                state: .succeeded,
+                                progress: .indeterminate
+                            )
+                        )
+                    )
+                    continuation.finish()
+                } catch {
+                    continuation.yield(
+                        .stageUpdated(
+                            WorkStage(
+                                id: "discovery",
+                                title: "Discovering content",
+                                detail: error.localizedDescription,
+                                state: .failed,
+                                progress: .indeterminate
+                            )
+                        )
+                    )
+                    continuation.finish(throwing: error)
+                }
+            }
+
+            continuation.onTermination = { @Sendable _ in
+                task.cancel()
+            }
+        }
+    }
+
     nonisolated func enrich(_ item: MinecraftContentItem, for source: MinecraftSource) async -> MinecraftContentItem {
         _ = source
         return item
@@ -109,12 +189,6 @@ extension SourceAccessMethod {
         return item.folderURL
     }
 
-    nonisolated func install(_ payload: InstallationPayload, in source: MinecraftSource) async throws -> InstalledContentItem {
-        _ = payload
-        _ = source
-        throw SourceAccessError.accessFailed(reason: "This source does not support installing Minecraft content.")
-    }
-
     nonisolated func purgeCachedArtifacts(for source: MinecraftSource) async {
         _ = source
     }
@@ -130,9 +204,10 @@ struct SourceAccessCoordinator: SourceAccessMethod {
 
     nonisolated init(
         localFolderAccess: SourceAccessMethod = LocalFolderSourceAccess(),
+        javaLocalFolderAccess: SourceAccessMethod = JavaLocalFolderSourceAccess(),
         connectedDeviceAccess: ConnectedDeviceSourceAccessMethod
     ) {
-        self.init(accessMethods: [localFolderAccess, connectedDeviceAccess])
+        self.init(accessMethods: [localFolderAccess, javaLocalFolderAccess, connectedDeviceAccess])
     }
 
     nonisolated init(accessMethods: [any SourceAccessMethod]) {
@@ -159,6 +234,64 @@ struct SourceAccessCoordinator: SourceAccessMethod {
         fatalError("No source access method is registered for \(source.accessDescriptor.accessorIdentifier).")
     }
 
+    nonisolated func probeLocalFolder(_ url: URL) async -> SourceProbeResult? {
+        var bestProbe: SourceProbeResult?
+
+        for accessMethod in accessMethodsByIdentifier.values {
+            guard let probe = await accessMethod.probeLocalFolder(url) else {
+                continue
+            }
+
+            guard probe.confidence > .none else {
+                continue
+            }
+
+            if let currentBest = bestProbe {
+                if probe.confidence > currentBest.confidence {
+                    bestProbe = probe
+                }
+            } else {
+                bestProbe = probe
+            }
+        }
+
+        return bestProbe
+    }
+
+    nonisolated func discoverSourceCandidates() -> AsyncThrowingStream<SourceCandidateEvent, Error> {
+        AsyncThrowingStream { continuation in
+            let accessMethods = Array(accessMethodsByIdentifier.values)
+            let task = Task.detached(priority: .userInitiated) {
+                await withTaskGroup(of: Void.self) { group in
+                    for accessMethod in accessMethods {
+                        group.addTask {
+                            do {
+                                for try await event in accessMethod.discoverSourceCandidates() {
+                                    continuation.yield(event)
+                                }
+                            } catch {
+                                continuation.yield(
+                                    .warning(
+                                        ProviderWarning(
+                                            id: "\(accessMethod.accessorIdentifier)-candidate-discovery-failed",
+                                            message: "Source discovery failed",
+                                            detail: error.localizedDescription
+                                        )
+                                    )
+                                )
+                            }
+                        }
+                    }
+                }
+                continuation.finish()
+            }
+
+            continuation.onTermination = { @Sendable _ in
+                task.cancel()
+            }
+        }
+    }
+
     nonisolated func discoverItems(
         for source: MinecraftSource,
         mode: SourceDiscoveryMode,
@@ -171,6 +304,13 @@ struct SourceAccessCoordinator: SourceAccessMethod {
         )
     }
 
+    nonisolated func scanEvents(
+        for source: MinecraftSource,
+        mode: SourceDiscoveryMode
+    ) -> AsyncThrowingStream<ProviderEvent, Error> {
+        accessMethod(for: source).scanEvents(for: source, mode: mode)
+    }
+
     nonisolated func accessDescriptor(for source: MinecraftSource) -> SourceAccessDescriptor {
         accessMethod(for: source).accessDescriptor(for: source)
     }
@@ -179,6 +319,10 @@ struct SourceAccessCoordinator: SourceAccessMethod {
         return await accessMethod(for: source).availability(for: source)
     }
 
+    nonisolated func accessStatus(for source: MinecraftSource) async -> SourceAccessStatus {
+        return await accessMethod(for: source).accessStatus(for: source)
+    }
+
     nonisolated func capabilities(for source: MinecraftSource) async -> SourceCapabilities {
         return await accessMethod(for: source).capabilities(for: source)
     }
@@ -211,10 +355,6 @@ struct SourceAccessCoordinator: SourceAccessMethod {
         return try await accessMethod(for: source).materializeItem(for: item, in: source)
     }
 
-    nonisolated func install(_ payload: InstallationPayload, in source: MinecraftSource) async throws -> InstalledContentItem {
-        return try await accessMethod(for: source).install(payload, in: source)
-    }
-
     nonisolated func purgeCachedArtifacts(for source: MinecraftSource) async {
         await accessMethod(for: source).purgeCachedArtifacts(for: source)
     }

World Manager for Minecraft/SourceAccess/LocalFolder/LocalFolderSourceAccess.swift

@@ -3,11 +3,17 @@
 
 import Foundation
 
-struct LocalFolderSourceAccess: SourceAccessMethod {
+typealias LocalFolderSourceAccess = BedrockLocalFolderSourceAccess
+
+struct BedrockLocalFolderSourceAccess: SourceAccessMethod {
     nonisolated let accessorIdentifier: SourceAccessorIdentifier = "local-folder"
 
     nonisolated init() {}
 
+    nonisolated func probeLocalFolder(_ url: URL) async -> SourceProbeResult? {
+        BedrockContentScanner.probeLocalFolder(url, providerID: accessorIdentifier)
+    }
+
     nonisolated func accessDescriptor(for source: MinecraftSource) -> SourceAccessDescriptor {
         _ = source
         return SourceAccessDescriptor(
@@ -18,9 +24,15 @@ struct LocalFolderSourceAccess: SourceAccessMethod {
     }
 
     nonisolated func availability(for source: MinecraftSource) async -> SourceAvailability {
+        await accessStatus(for: source).availability
+    }
+
+    nonisolated func accessStatus(for source: MinecraftSource) async -> SourceAccessStatus {
         let candidateURL: URL
+        let mode: SourceAccessMode
         if case .localFolder(let bookmarkData) = source.origin,
            let bookmarkData {
+            mode = .securityScopedLocalFolder
             var isStale = false
             if let resolvedURL = try? URL(
                 resolvingBookmarkData: bookmarkData,
@@ -33,10 +45,19 @@ struct LocalFolderSourceAccess: SourceAccessMethod {
                 candidateURL = source.folderURL
             }
         } else {
+            mode = .localFileSystem
             candidateURL = source.folderURL
         }
 
-        return FileManager.default.fileExists(atPath: candidateURL.path) ? .available : .unavailable
+        let availability: SourceAvailability = FileManager.default.fileExists(atPath: candidateURL.path) ? .available : .unavailable
+        return SourceAccessStatus(
+            availability: availability,
+            mode: mode,
+            displayName: source.displayName,
+            iconSystemName: "folder",
+            statusText: availability == .available ? nil : "Folder unavailable",
+            warningText: nil
+        )
     }
 
     nonisolated func capabilities(for source: MinecraftSource) async -> SourceCapabilities {
@@ -133,97 +154,6 @@ struct LocalFolderSourceAccess: SourceAccessMethod {
         return item.folderURL
     }
 
-    nonisolated func install(_ payload: InstallationPayload, in source: MinecraftSource) async throws -> InstalledContentItem {
-        let sourceRootURL = try resolvedSourceRootURL(for: source)
-        let accessedSecurityScope = sourceRootURL.startAccessingSecurityScopedResource()
-        defer {
-            if accessedSecurityScope {
-                sourceRootURL.stopAccessingSecurityScopedResource()
-            }
-        }
-
-        let fileManager = FileManager.default
-        let contentRootURL = try resolvedContentRootURL(for: source, sourceRootURL: sourceRootURL)
-        let collectionURL = contentRootURL.appendingPathComponent(
-            payload.contentType.collectionFolderName,
-            isDirectory: true
-        )
-        let stagingRootURL = contentRootURL
-            .appendingPathComponent(".world-manager-staging", isDirectory: true)
-        let stagedItemURL = stagingRootURL
-            .appendingPathComponent(UUID().uuidString, isDirectory: true)
-
-        try fileManager.createDirectory(at: stagingRootURL, withIntermediateDirectories: true)
-        do {
-            try fileManager.copyItem(at: payload.preparedDirectoryURL, to: stagedItemURL)
-            try fileManager.createDirectory(at: collectionURL, withIntermediateDirectories: true)
-            let destinationURL = uniqueDestinationURL(
-                in: collectionURL,
-                preferredName: payload.suggestedFolderName,
-                fileManager: fileManager
-            )
-            try fileManager.moveItem(at: stagedItemURL, to: destinationURL)
-            return InstalledContentItem(
-                contentType: payload.contentType,
-                displayName: payload.displayName,
-                destinationName: destinationURL.lastPathComponent
-            )
-        } catch {
-            try? fileManager.removeItem(at: stagedItemURL)
-            throw error
-        }
-    }
-
-    nonisolated private func resolvedSourceRootURL(for source: MinecraftSource) throws -> URL {
-        guard case .localFolder(let bookmarkData) = source.origin, let bookmarkData else {
-            return source.folderURL
-        }
-
-        var isStale = false
-        return try URL(
-            resolvingBookmarkData: bookmarkData,
-            options: [.withSecurityScope],
-            relativeTo: nil,
-            bookmarkDataIsStale: &isStale
-        ).standardizedFileURL
-    }
-
-    nonisolated private func resolvedContentRootURL(
-        for source: MinecraftSource,
-        sourceRootURL: URL
-    ) throws -> URL {
-        let observedRoots = Set(source.rawItems.map {
-            $0.collectionRootURL.deletingLastPathComponent().standardizedFileURL
-        })
-        if let minimumDepth = observedRoots.map(\.pathComponents.count).min() {
-            let shallowestRoots = observedRoots.filter { $0.pathComponents.count == minimumDepth }
-            if shallowestRoots.count == 1, let observedRoot = shallowestRoots.first {
-                return observedRoot
-            }
-            if shallowestRoots.count > 1 {
-                throw SourceAccessError.accessFailed(
-                    reason: "This source contains more than one Minecraft content root. Choose the specific com.mojang folder before importing."
-                )
-            }
-        }
-
-        return sourceRootURL
-    }
-
-    nonisolated private func uniqueDestinationURL(
-        in collectionURL: URL,
-        preferredName: String,
-        fileManager: FileManager
-    ) -> URL {
-        var candidateURL = collectionURL.appendingPathComponent(preferredName, isDirectory: true)
-        var suffix = 2
-        while fileManager.fileExists(atPath: candidateURL.path) {
-            candidateURL = collectionURL.appendingPathComponent("\(preferredName)-\(suffix)", isDirectory: true)
-            suffix += 1
-        }
-        return candidateURL
-    }
-
     nonisolated private func discoverItemsByReconcilingCache(
         for source: MinecraftSource,
         snapshot: SourceSnapshot,
@@ -282,3 +212,185 @@ struct LocalFolderSourceAccess: SourceAccessMethod {
         return components.first.map(String.init)
     }
 }
+
+struct JavaLocalFolderSourceAccess: SourceAccessMethod {
+    nonisolated let accessorIdentifier: SourceAccessorIdentifier = "java-local-folder"
+    private let candidateDiscoveryRoots: [URL]?
+
+    nonisolated init(candidateDiscoveryRoots: [URL]? = nil) {
+        self.candidateDiscoveryRoots = candidateDiscoveryRoots
+    }
+
+    nonisolated func probeLocalFolder(_ url: URL) async -> SourceProbeResult? {
+        JavaContentScanner.probeLocalFolder(url, providerID: accessorIdentifier)
+    }
+
+    nonisolated func discoverSourceCandidates() -> AsyncThrowingStream<SourceCandidateEvent, Error> {
+        AsyncThrowingStream { continuation in
+            let roots = candidateDiscoveryRoots
+            let providerID = accessorIdentifier
+            let task = Task.detached(priority: .utility) {
+                continuation.yield(
+                    .stageUpdated(
+                        WorkStage(
+                            id: "\(providerID)-candidate-discovery",
+                            title: "Finding Java sources",
+                            detail: nil,
+                            state: .running,
+                            progress: .indeterminate
+                        )
+                    )
+                )
+
+                let candidates = JavaContentScanner.discoverSourceCandidates(
+                    providerID: providerID,
+                    searchRoots: roots
+                )
+                for candidate in candidates {
+                    continuation.yield(.candidate(candidate))
+                }
+
+                continuation.yield(
+                    .stageUpdated(
+                        WorkStage(
+                            id: "\(providerID)-candidate-discovery",
+                            title: "Finding Java sources",
+                            detail: candidates.isEmpty ? "No Java sources found." : "Found \(candidates.count) Java sources.",
+                            state: .succeeded,
+                            progress: .indeterminate
+                        )
+                    )
+                )
+                continuation.finish()
+            }
+
+            continuation.onTermination = { @Sendable _ in
+                task.cancel()
+            }
+        }
+    }
+
+    nonisolated func accessDescriptor(for source: MinecraftSource) -> SourceAccessDescriptor {
+        _ = source
+        return SourceAccessDescriptor(
+            accessorIdentifier: accessorIdentifier,
+            kind: .localFolder,
+            refreshStrategy: .eagerFullScan
+        )
+    }
+
+    nonisolated func accessStatus(for source: MinecraftSource) async -> SourceAccessStatus {
+        let candidateURL: URL
+        let mode: SourceAccessMode
+        let bookmarkData: Data?
+        switch source.origin {
+        case .javaLocalFolder(let data), .localFolder(let data):
+            bookmarkData = data
+        case .connectedDevice:
+            bookmarkData = nil
+        }
+
+        if let bookmarkData {
+            mode = .securityScopedLocalFolder
+            var isStale = false
+            if let resolvedURL = try? URL(
+                resolvingBookmarkData: bookmarkData,
+                options: [.withSecurityScope],
+                relativeTo: nil,
+                bookmarkDataIsStale: &isStale
+            ) {
+                candidateURL = resolvedURL.standardizedFileURL
+            } else {
+                candidateURL = source.folderURL
+            }
+        } else {
+            mode = .localFileSystem
+            candidateURL = source.folderURL
+        }
+
+        let availability: SourceAvailability = FileManager.default.fileExists(atPath: candidateURL.path) ? .available : .unavailable
+        return SourceAccessStatus(
+            availability: availability,
+            mode: mode,
+            displayName: source.displayName,
+            iconSystemName: "folder",
+            statusText: availability == .available ? nil : "Folder unavailable",
+            warningText: nil
+        )
+    }
+
+    nonisolated func capabilities(for source: MinecraftSource) async -> SourceCapabilities {
+        _ = source
+        return .localFolder
+    }
+
+    nonisolated func discoverItems(
+        for source: MinecraftSource,
+        mode: SourceDiscoveryMode,
+        onDiscovered: @escaping @Sendable (MinecraftContentItem) -> Void
+    ) async throws {
+        _ = mode
+        let bookmarkData: Data?
+        switch source.origin {
+        case .javaLocalFolder(let data), .localFolder(let data):
+            bookmarkData = data
+        case .connectedDevice:
+            throw SourceAccessError.accessFailed(
+                reason: "No Java local-folder access method is configured for this source type."
+            )
+        }
+
+        let resolvedURL: URL
+        if let bookmarkData {
+            var isStale = false
+            guard let bookmarkURL = try? URL(
+                resolvingBookmarkData: bookmarkData,
+                options: [.withSecurityScope],
+                relativeTo: nil,
+                bookmarkDataIsStale: &isStale
+            ) else {
+                throw SourceAccessError.accessFailed(
+                    reason: "The saved folder bookmark could not be resolved."
+                )
+            }
+
+            resolvedURL = bookmarkURL.standardizedFileURL
+        } else {
+            resolvedURL = source.folderURL
+        }
+
+        let accessedSecurityScope = resolvedURL.startAccessingSecurityScopedResource()
+        defer {
+            if accessedSecurityScope {
+                resolvedURL.stopAccessingSecurityScopedResource()
+            }
+        }
+
+        _ = try JavaContentScanner.discoverItems(in: resolvedURL, onDiscovered: onDiscovered)
+    }
+
+    nonisolated func enrich(_ item: MinecraftContentItem, for source: MinecraftSource) async -> MinecraftContentItem {
+        _ = source
+        return await JavaContentScanner.enrich(item: item)
+    }
+
+    nonisolated func loadSize(for item: MinecraftContentItem, in source: MinecraftSource) async -> MinecraftContentItem {
+        _ = source
+        return JavaContentScanner.loadSize(for: item)
+    }
+
+    nonisolated func listItemContents(for item: MinecraftContentItem, in source: MinecraftSource) async throws -> [DirectoryEntry] {
+        _ = source
+        let values = try? item.folderURL.resourceValues(forKeys: [.isDirectoryKey])
+        guard values?.isDirectory == true else {
+            return []
+        }
+
+        return try await BedrockLocalFolderSourceAccess().listItemContents(for: item, in: source)
+    }
+
+    nonisolated func materializeItem(for item: MinecraftContentItem, in source: MinecraftSource) async throws -> URL {
+        _ = source
+        return item.folderURL
+    }
+}

World Manager for Minecraft/UI/Detail/ConnectedDeviceDetailView.swift

@@ -0,0 +1,133 @@
+// SPDX-FileCopyrightText: 2026 John Burwell and contributors
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+import SwiftUI
+
+struct ConnectedDeviceDetailView: View {
+    let entry: ConnectedDeviceSidebarEntry
+    let addAction: (() -> Void)?
+
+    var body: some View {
+        ScrollView {
+            VStack(alignment: .leading, spacing: 24) {
+                VStack(alignment: .leading, spacing: 8) {
+                    Text(entry.device.name)
+                        .font(.largeTitle.weight(.semibold))
+
+                    Text("Available connected device")
+                        .foregroundStyle(.secondary)
+                }
+
+                if let addAction {
+                    Button("Add Source") {
+                        addAction()
+                    }
+                    .buttonStyle(.borderedProminent)
+                }
+
+                sourceSection(title: "Overview", rows: overviewRows)
+                sourceSection(title: "Minecraft Access", rows: minecraftRows)
+                sourceSection(title: "Technical Details", rows: technicalRows)
+            }
+            .frame(maxWidth: 760, alignment: .leading)
+            .padding(28)
+        }
+    }
+
+    private var overviewRows: [(String, String)] {
+        var rows: [(String, String)] = [
+            ("Connection", connectionLabel),
+            ("Trust State", trustStateLabel),
+            ("Availability", entry.hasMinecraftContainer ? "Ready to add" : "Not ready")
+        ]
+
+        if let productType = entry.device.productType, !productType.isEmpty {
+            rows.append(("Product Type", productType))
+        }
+        if let osVersion = entry.device.osVersion, !osVersion.isEmpty {
+            rows.append(("OS Version", osVersion))
+        }
+
+        return rows
+    }
+
+    private var minecraftRows: [(String, String)] {
+        if let error = entry.discoveryErrorDescription, !error.isEmpty {
+            return [("Discovery Error", error)]
+        }
+
+        guard let container = entry.minecraftContainer else {
+            return [("Minecraft Container", "Not found")]
+        }
+
+        var rows: [(String, String)] = [
+            ("Minecraft Container", container.appName),
+            ("App ID", container.appID),
+            ("Access Mode", container.accessMode.rawValue)
+        ]
+
+        if let relativePath = container.minecraftFolderRelativePath, !relativePath.isEmpty {
+            rows.append(("Minecraft Path", relativePath))
+        }
+
+        return rows
+    }
+
+    private var technicalRows: [(String, String)] {
+        [
+            ("UDID", entry.device.udid),
+            ("Device ID", entry.id)
+        ]
+    }
+
+    private var connectionLabel: String {
+        switch entry.device.connection {
+        case .usb:
+            return "USB"
+        case .network:
+            return "Network"
+        }
+    }
+
+    private var trustStateLabel: String {
+        switch entry.device.trustState {
+        case .trusted:
+            return "Trusted"
+        case .locked:
+            return "Locked"
+        case .untrusted:
+            return "Untrusted"
+        case .unavailable:
+            return "Unavailable"
+        }
+    }
+
+    @ViewBuilder
+    private func sourceSection(title: String, rows: [(String, String)]) -> some View {
+        VStack(alignment: .leading, spacing: 12) {
+            Text(title)
+                .appSectionTitleStyle(.section)
+
+            VStack(spacing: 0) {
+                ForEach(rows, id: \.0) { title, value in
+                    detailRow(title: title, value: value)
+                }
+            }
+            .appDetailSectionCard()
+        }
+    }
+
+    @ViewBuilder
+    private func detailRow(title: String, value: String) -> some View {
+        HStack(alignment: .firstTextBaseline) {
+            Text(title)
+                .appTextStyle(.fieldLabel)
+                .frame(width: 150, alignment: .leading)
+
+            Text(value)
+                .textSelection(.enabled)
+                .frame(maxWidth: .infinity, alignment: .leading)
+        }
+        .padding(.vertical, 8)
+    }
+}

World Manager for Minecraft/UI/Detail/ItemDetailColumnViews.swift

@@ -7,7 +7,8 @@ import SwiftUI
 struct ItemDetailColumnView: View {
     let item: MinecraftContentItem?
     let source: MinecraftSource?
-    let installationState: SourceInstallationState?
+    let sourceCandidate: SourceCandidate?
+    let connectedDevice: ConnectedDeviceSidebarEntry?
     let showsSourceDetails: Bool
     let behaviorPacks: [ContentPackReference]
     let resourcePacks: [ContentPackReference]
@@ -23,12 +24,13 @@ struct ItemDetailColumnView: View {
     let exportAction: () -> Void
     let revealAction: () -> Void
     let shareAction: (NSView?) -> Void
-    let importAction: (MinecraftSource) -> Void
+    let addCandidateSourceAction: (SourceCandidate) -> Void
+    let revealCandidateAction: (SourceCandidate) -> Void
+    let addConnectedDeviceAction: (ConnectedDeviceSidebarEntry) -> Void
 
     var body: some View {
         Group {
-            if isEmpty {
-            } else if let item {
+            if let item {
                 ItemDetailView(
                     item: item,
                     source: source,
@@ -47,13 +49,25 @@ struct ItemDetailColumnView: View {
                     shareAction: shareAction
                 )
             } else if showsSourceDetails, let source {
-                SourceDetailView(
-                    source: source,
-                    installationState: installationState,
-                    importAction: {
-                        importAction(source)
+                SourceDetailView(source: source)
+            } else if let sourceCandidate {
+                SourceCandidateDetailView(
+                    candidate: sourceCandidate,
+                    addAction: {
+                        addCandidateSourceAction(sourceCandidate)
+                    },
+                    revealAction: {
+                        revealCandidateAction(sourceCandidate)
                     }
                 )
+            } else if let connectedDevice {
+                ConnectedDeviceDetailView(
+                    entry: connectedDevice,
+                    addAction: connectedDevice.hasMinecraftContainer ? {
+                        addConnectedDeviceAction(connectedDevice)
+                    } : nil
+                )
+            } else if isEmpty {
             } else {
                 Text("Select a world or pack to see details")
                     .foregroundStyle(.secondary)

World Manager for Minecraft/UI/Detail/ItemDetailView.swift

@@ -162,7 +162,7 @@ struct ItemDetailView: View {
                     recordSection(title: "Technical Details") {
                         VStack(alignment: .leading, spacing: 14) {
                             detailRow(title: "Folder ID", value: item.folderID)
-                            detailRow(title: "Type", value: item.contentType.rawValue)
+                            detailRow(title: "Type", value: item.platformType.displayName)
                             detailRow(title: "Collection Folder", value: item.collectionRootURL.lastPathComponent)
                             if let spawn = item.worldMetadata?.spawn {
                                 detailValueRow(title: "Spawn", value: spawn)
@@ -249,13 +249,49 @@ struct ItemDetailView: View {
                 )
             }
 
-            if item.contentType == .behaviorPack || item.contentType == .resourcePack {
+            if item.sourceEdition == .bedrock && (item.contentType == .behaviorPack || item.contentType == .resourcePack) {
                 detailValueRow(title: "UUID", value: item.packUUID ?? "Unavailable")
                 detailValueRow(title: "Version", value: item.packVersion ?? "Unavailable")
                 if let minimumEngineVersion = item.packMetadataDetails?.minimumEngineVersion {
                     detailValueRow(title: "Minimum Engine", value: minimumEngineVersion)
                 }
             }
+
+            if let javaPackMetadata {
+                if let description = javaPackMetadata.description {
+                    detailRow(title: javaModMetadata == nil ? "Description" : "Pack Description", value: description)
+                }
+                if let packFormat = javaPackMetadata.packFormat {
+                    detailValueRow(title: "Pack Format", value: String(packFormat))
+                }
+                if let supportedFormats = javaPackMetadata.supportedFormats {
+                    detailValueRow(title: "Supported Formats", value: supportedFormats)
+                }
+            }
+
+            if let javaModMetadata {
+                if let modID = javaModMetadata.modID {
+                    detailValueRow(title: "Mod ID", value: modID)
+                }
+                if let version = javaModMetadata.version {
+                    detailValueRow(title: "Mod Version", value: version)
+                }
+                if let description = javaModMetadata.description {
+                    detailRow(title: "Mod Description", value: description)
+                }
+                if !javaModMetadata.authors.isEmpty {
+                    detailValueRow(title: "Authors", value: javaModMetadata.authors.joined(separator: ", "))
+                }
+                if let license = javaModMetadata.license {
+                    detailValueRow(title: "License", value: license)
+                }
+                if let environment = javaModMetadata.environment {
+                    detailValueRow(title: "Environment", value: environment)
+                }
+                if let minecraftRequirement = javaModMetadata.minecraftVersionRequirement {
+                    detailValueRow(title: "Minecraft", value: minecraftRequirement)
+                }
+            }
         }
     }
 
@@ -349,7 +385,13 @@ struct ItemDetailView: View {
     }
 
     private var heroMetadata: [String] {
-        var chips = [item.contentType.rawValue, sizeText, "\(item.displayDateLabel) \(displayDateText)"]
+        var chips = [item.platformType.displayName, sizeText, "\(item.displayDateLabel) \(displayDateText)"]
+
+        if let modID = javaModMetadata?.modID {
+            chips.append(modID)
+        } else if let packFormat = javaPackMetadata?.packFormat {
+            chips.append("Format \(packFormat)")
+        }
 
         if item.contentType == .world {
             let packCount = behaviorPacks.count + resourcePacks.count
@@ -388,6 +430,22 @@ struct ItemDetailView: View {
         return max(0, relatedWorldIDs.subtracting([item.id]).count)
     }
 
+    private var javaPackMetadata: JavaPackMetadata? {
+        if case .java(let metadata) = item.platformMetadata {
+            return metadata.pack
+        }
+
+        return nil
+    }
+
+    private var javaModMetadata: JavaModMetadata? {
+        if case .java(let metadata) = item.platformMetadata {
+            return metadata.mod
+        }
+
+        return nil
+    }
+
     private var actionRowExportTitle: String {
         if exportTitle != nil {
             switch item.contentType {

World Manager for Minecraft/UI/Detail/SourceCandidateDetailView.swift

@@ -0,0 +1,156 @@
+// SPDX-FileCopyrightText: 2026 John Burwell and contributors
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+import SwiftUI
+
+struct SourceCandidateDetailView: View {
+    let candidate: SourceCandidate
+    let addAction: () -> Void
+    let revealAction: () -> Void
+
+    var body: some View {
+        ScrollView {
+            VStack(alignment: .leading, spacing: 24) {
+                VStack(alignment: .leading, spacing: 8) {
+                    Text(candidate.displayName)
+                        .font(.largeTitle.weight(.semibold))
+
+                    Text("Found source candidate")
+                        .foregroundStyle(.secondary)
+                }
+
+                HStack(spacing: 10) {
+                    Button("Add Source") {
+                        addAction()
+                    }
+                    .buttonStyle(.borderedProminent)
+
+                    Button("Reveal in Finder") {
+                        revealAction()
+                    }
+                    .buttonStyle(.bordered)
+                }
+
+                sourceSection(title: "Overview", rows: overviewRows)
+                sourceSection(title: "Detected Content", rows: contentRows)
+                sourceSection(title: "Location", rows: locationRows)
+                sourceSection(title: "Technical Details", rows: technicalRows)
+            }
+            .frame(maxWidth: 760, alignment: .leading)
+            .padding(28)
+        }
+    }
+
+    private var overviewRows: [(String, String)] {
+        [
+            ("Edition", editionLabel),
+            ("Provider", providerLabel),
+            ("Confidence", confidenceLabel),
+            ("Reason", candidate.reason)
+        ]
+    }
+
+    private var contentRows: [(String, String)] {
+        guard !candidate.detectedKinds.isEmpty else {
+            return [("Detected Kinds", "None")]
+        }
+
+        return [("Detected Kinds", orderedKindLabels.joined(separator: ", "))]
+    }
+
+    private var locationRows: [(String, String)] {
+        [
+            ("Filesystem Path", candidate.sourceRootURL.path)
+        ]
+    }
+
+    private var technicalRows: [(String, String)] {
+        [
+            ("Provider ID", candidate.providerID),
+            ("Candidate ID", candidate.id)
+        ]
+    }
+
+    private var editionLabel: String {
+        switch candidate.edition {
+        case .bedrock:
+            return "Bedrock"
+        case .java:
+            return "Java"
+        }
+    }
+
+    private var providerLabel: String {
+        switch candidate.providerID {
+        case JavaLocalFolderSourceAccess().accessorIdentifier:
+            return "Java Local Folder"
+        case LocalFolderSourceAccess().accessorIdentifier:
+            return "Bedrock Local Folder"
+        case AppleMobileDeviceSourceAccess().accessorIdentifier:
+            return "Bedrock iOS Device"
+        default:
+            return candidate.providerID
+        }
+    }
+
+    private var confidenceLabel: String {
+        switch candidate.confidence {
+        case .none:
+            return "None"
+        case .weak:
+            return "Weak"
+        case .medium:
+            return "Medium"
+        case .strong:
+            return "Strong"
+        case .exact:
+            return "Exact"
+        }
+    }
+
+    private var orderedKindLabels: [String] {
+        let orderedKinds: [(MinecraftContentKind, String)] = [
+            (.world, "Worlds"),
+            (.behaviorPack, "Behavior Packs"),
+            (.resourcePack, "Resource Packs"),
+            (.dataPack, "Data Packs"),
+            (.skinPack, "Skin Packs"),
+            (.worldTemplate, "World Templates"),
+            (.shaderPack, "Shader Packs"),
+            (.mod, "Mods")
+        ]
+
+        return orderedKinds.compactMap { kind, label in
+            candidate.detectedKinds.contains(kind) ? label : nil
+        }
+    }
+
+    @ViewBuilder
+    private func sourceSection(title: String, rows: [(String, String)]) -> some View {
+        VStack(alignment: .leading, spacing: 12) {
+            Text(title)
+                .appSectionTitleStyle(.section)
+
+            VStack(spacing: 0) {
+                ForEach(rows, id: \.0) { title, value in
+                    detailRow(title: title, value: value)
+                }
+            }
+            .appDetailSectionCard()
+        }
+    }
+
+    @ViewBuilder
+    private func detailRow(title: String, value: String) -> some View {
+        HStack(alignment: .firstTextBaseline) {
+            Text(title)
+                .appTextStyle(.fieldLabel)
+                .frame(width: 150, alignment: .leading)
+
+            Text(value)
+                .textSelection(.enabled)
+                .frame(maxWidth: .infinity, alignment: .leading)
+        }
+        .padding(.vertical, 8)
+    }
+}

World Manager for Minecraft/UI/Detail/SourceDetailView.swift

@@ -20,37 +20,12 @@ struct SourceDetailView: View {
     }
 
     let source: MinecraftSource
-    let installationState: SourceInstallationState?
-    let importAction: () -> Void
 
     var body: some View {
         ScrollView {
             VStack(alignment: .leading, spacing: 24) {
-                HStack(alignment: .firstTextBaseline) {
-                    Text(source.displayName)
-                        .font(.largeTitle.weight(.semibold))
-
-                    Spacer()
-
-                    Button("Import...", action: importAction)
-                        .disabled(
-                            source.availability != .available ||
-                            !source.capabilities.canInstallItems ||
-                            installationState != nil
-                        )
-                }
-
-                if let installationState {
-                    VStack(alignment: .leading, spacing: 8) {
-                        ProgressView(
-                            value: Double(installationState.completedCount),
-                            total: Double(max(installationState.totalCount, 1))
-                        )
-                        Text(installationState.status)
-                            .appTextStyle(.supporting)
-                    }
-                    .appDetailSectionCard()
-                }
+                Text(source.displayName)
+                    .font(.largeTitle.weight(.semibold))
 
                 if showsStatusSection {
                     sourceStatusSection
@@ -208,7 +183,7 @@ struct SourceDetailView: View {
         }
 
         switch source.origin {
-        case .localFolder:
+        case .localFolder, .javaLocalFolder:
             break
         case .connectedDevice(let device, let container):
             rows.append(("Connection", device.connection == .network ? "Network" : "USB"))
@@ -222,19 +197,31 @@ struct SourceDetailView: View {
     }
 
     private var contentRows: [(String, String)] {
-        [
-            ("Total Items", source.items.count.formatted(.number)),
-            ("Worlds", itemCount(for: .world).formatted(.number)),
-            ("Behavior Packs", itemCount(for: .behaviorPack).formatted(.number)),
-            ("Resource Packs", itemCount(for: .resourcePack).formatted(.number)),
-            ("Skin Packs", itemCount(for: .skinPack).formatted(.number)),
-            ("World Templates", itemCount(for: .worldTemplate).formatted(.number))
+        var rows = [("Total Items", source.items.count.formatted(.number))]
+        let orderedKinds: [(MinecraftContentKind, String)] = [
+            (.world, "Worlds"),
+            (.behaviorPack, "Behavior Packs"),
+            (.resourcePack, "Resource Packs"),
+            (.dataPack, "Data Packs"),
+            (.skinPack, "Skin Packs"),
+            (.worldTemplate, "World Templates"),
+            (.shaderPack, "Shader Packs"),
+            (.mod, "Mods")
         ]
+
+        for (kind, title) in orderedKinds {
+            let count = itemCount(for: kind)
+            if count > 0 || source.edition == .bedrock && bedrockAlwaysDisplayedContentKinds.contains(kind) {
+                rows.append((title, count.formatted(.number)))
+            }
+        }
+
+        return rows
     }
 
     private var locationRows: [(String, String)] {
         switch source.origin {
-        case .localFolder:
+        case .localFolder, .javaLocalFolder:
             return [("Filesystem Path", source.folderURL.path)]
         case .connectedDevice(_, let container):
             var rows: [(String, String)] = [
@@ -249,7 +236,7 @@ struct SourceDetailView: View {
 
     private var technicalRows: [(String, String)] {
         switch source.origin {
-        case .localFolder:
+        case .localFolder, .javaLocalFolder:
             return []
         case .connectedDevice(let device, let container):
             var rows: [(String, String)] = [
@@ -269,6 +256,8 @@ struct SourceDetailView: View {
         switch source.origin {
         case .localFolder:
             return "Local Folder"
+        case .javaLocalFolder:
+            return "Java Local Folder"
         case .connectedDevice:
             return "Connected Device"
         }
@@ -508,6 +497,14 @@ struct SourceDetailView: View {
         source.items.filter { $0.contentType == type }.count
     }
 
+    private func itemCount(for kind: MinecraftContentKind) -> Int {
+        source.items.filter { $0.contentKind == kind }.count
+    }
+
+    private var bedrockAlwaysDisplayedContentKinds: Set<MinecraftContentKind> {
+        [.world, .behaviorPack, .resourcePack, .skinPack, .worldTemplate]
+    }
+
     @ViewBuilder
     private func sourceSection(title: String, rows: [(String, String)]) -> some View {
         VStack(alignment: .leading, spacing: 12) {

World Manager for Minecraft/UI/List/ItemListColumnViews.swift

@@ -41,7 +41,6 @@ struct ItemListColumnView<MenuContent: View>: View {
     let searchPrompt: String
     let chooseFolderAction: () -> Void
     let dropAction: ([NSItemProvider]) -> Bool
-    let dragProvider: (MinecraftContentItem) -> NSItemProvider
     let itemContextMenu: (MinecraftContentItem) -> MenuContent
 
     var body: some View {
@@ -56,14 +55,6 @@ struct ItemListColumnView<MenuContent: View>: View {
                 List(items, selection: $selectedItemID) { item in
                     ContentRowView(item: item)
                         .tag(item.id)
-                        .onDrag {
-                            dragProvider(item)
-                        }
-                        .simultaneousGesture(
-                            TapGesture().onEnded {
-                                selectedItemID = item.id
-                            }
-                        )
                         .contextMenu {
                             itemContextMenu(item)
                         }
@@ -82,8 +73,8 @@ struct ItemListColumnView<MenuContent: View>: View {
                     sourceName: sourceName,
                     showsSourceName: showsSourceName,
                     title: title,
-                    subtitle: subtitle,
-                    showsSubtitle: showsSubtitle,
+                    subtitle: navigationSubtitleText,
+                    showsSubtitle: showsSubtitle || showsProjectionLoadingState,
                     isRefreshing: isRefreshing,
                     showsProjectionLoadingState: showsProjectionLoadingState
                 )
@@ -91,7 +82,7 @@ struct ItemListColumnView<MenuContent: View>: View {
         }
         .searchable(text: $searchText, prompt: searchPrompt)
         .navigationTitle(isEmpty ? "Library" : title)
-        .navigationSubtitle(isEmpty ? "" : subtitle)
+        .navigationSubtitle(isEmpty ? "" : navigationSubtitleText)
         .toolbar {
             if !isEmpty {
                 ToolbarItemGroup {
@@ -109,6 +100,13 @@ struct ItemListColumnView<MenuContent: View>: View {
             }
         }
     }
+
+    private var navigationSubtitleText: String {
+        if showsProjectionLoadingState {
+            return "Loading items..."
+        }
+        return subtitle
+    }
 }
 
 private struct ItemListHeaderView: View {
@@ -139,8 +137,8 @@ private struct ItemListHeaderView: View {
                 }
             }
 
-            if showsSubtitle || showsProjectionLoadingState {
-                Text(displaySubtitle)
+            if showsSubtitle {
+                Text(subtitle)
                     .appTextStyle(.supporting)
             }
         }
@@ -150,14 +148,6 @@ private struct ItemListHeaderView: View {
         .padding(.bottom, 12)
         .appListHeaderSurface()
     }
-
-    private var displaySubtitle: String {
-        if showsProjectionLoadingState {
-            return "Loading items..."
-        }
-
-        return subtitle
-    }
 }
 
 private struct ItemListLoadingOverlay: View {

World Manager for Minecraft/UI/Preview/PreviewFixtures.swift

@@ -6,7 +6,7 @@ import SwiftUI
 
 #if DEBUG
 
-enum PreviewFixtures {
+nonisolated enum PreviewFixtures {
     static let baseDate = Date(timeIntervalSinceReferenceDate: 770_000_000)
 
     static let sourceOneURL = URL(fileURLWithPath: "/tmp/preview-library-1")
@@ -132,7 +132,7 @@ enum PreviewFixtures {
     )
 
     static let primarySource: MinecraftSource = {
-        var source = MinecraftSource(folderURL: sourceOneURL)
+        var source = MinecraftSource(folderURL: sourceOneURL, availability: .available)
         source.displayName = "Kid iPad Imports"
         source.displayItems = [
             featuredWorld,
@@ -144,6 +144,9 @@ enum PreviewFixtures {
         source.displayItemCountsByType = source.displayItems.reduce(into: [MinecraftContentType: Int]()) { counts, item in
             counts[item.contentType, default: 0] += 1
         }
+        source.displayItemCountsByKind = source.displayItems.reduce(into: [MinecraftContentKind: Int]()) { counts, item in
+            counts[item.contentKind, default: 0] += 1
+        }
         source.rawItems = source.displayItems
         source.logicalPacks = [
             LogicalPack(
@@ -223,12 +226,15 @@ enum PreviewFixtures {
     }()
 
     static let secondarySource: MinecraftSource = {
-        var source = MinecraftSource(folderURL: sourceTwoURL)
+        var source = MinecraftSource(folderURL: sourceTwoURL, availability: .available)
         source.displayName = "Downloads"
         source.displayItems = [secondLibraryPack]
         source.displayItemCountsByType = source.displayItems.reduce(into: [MinecraftContentType: Int]()) { counts, item in
             counts[item.contentType, default: 0] += 1
         }
+        source.displayItemCountsByKind = source.displayItems.reduce(into: [MinecraftContentKind: Int]()) { counts, item in
+            counts[item.contentKind, default: 0] += 1
+        }
         source.rawItems = source.displayItems
         source.indexedItemCount = source.displayItems.count
         source.indexedDetailCount = source.displayItems.count
@@ -247,6 +253,87 @@ enum PreviewFixtures {
     ]
 }
 
+struct PreviewSourceAccess: SourceAccessMethod {
+    nonisolated let accessorIdentifier: SourceAccessorIdentifier = "preview-source"
+
+    nonisolated init() {}
+
+    nonisolated func accessStatus(for source: MinecraftSource) async -> SourceAccessStatus {
+        SourceAccessStatus(
+            availability: .available,
+            mode: .localFileSystem,
+            displayName: source.displayName,
+            iconSystemName: "folder",
+            statusText: nil,
+            warningText: nil
+        )
+    }
+
+    nonisolated func capabilities(for source: MinecraftSource) async -> SourceCapabilities {
+        _ = source
+        return .localFolder
+    }
+
+    nonisolated func discoverItems(
+        for source: MinecraftSource,
+        mode: SourceDiscoveryMode,
+        onDiscovered: @escaping @Sendable (MinecraftContentItem) -> Void
+    ) async throws {
+        _ = mode
+        for item in source.displayItems {
+            onDiscovered(item)
+        }
+    }
+
+    nonisolated func listItemContents(for item: MinecraftContentItem, in source: MinecraftSource) async throws -> [DirectoryEntry] {
+        _ = item
+        _ = source
+        return PreviewFixtures.directoryEntries
+    }
+
+    nonisolated func materializeItem(for item: MinecraftContentItem, in source: MinecraftSource) async throws -> URL {
+        _ = source
+        return item.folderURL
+    }
+}
+
+@MainActor
+extension SourceLibrary {
+    static func makePreview() -> SourceLibrary {
+        let library = SourceLibrary(
+            sourceAccessMethod: PreviewSourceAccess(),
+            restoresPersistedSources: false,
+            startsBackgroundRefresh: false
+        )
+        library.sources = PreviewFixtures.allSources
+        library.sourceCandidates = [
+            SourceCandidate(
+                providerID: LocalFolderSourceAccess().accessorIdentifier,
+                edition: .bedrock,
+                sourceRootURL: URL(fileURLWithPath: "/tmp/preview-candidate"),
+                displayName: "Found Minecraft Folder",
+                confidence: .strong,
+                reason: "Contains Minecraft content folders",
+                detectedKinds: [.world, .resourcePack]
+            )
+        ]
+        return library
+    }
+}
+
+extension ContentViewDependencies {
+    @MainActor
+    static func makePreview() -> ContentViewDependencies {
+        let connectedDeviceAccess = AppleMobileDeviceSourceAccess()
+        return ContentViewDependencies(
+            library: .makePreview(),
+            connectedDeviceAccess: connectedDeviceAccess,
+            deviceSourceFactory: ConnectedDeviceSourceFactory(),
+            itemActionService: ContentItemActionService()
+        )
+    }
+}
+
 @MainActor
 struct SidebarColumnPreviewContainer: View {
     @State private var selection: SidebarSelection? = .allContent(sourceID: PreviewFixtures.primarySource.id)
@@ -256,15 +343,16 @@ struct SidebarColumnPreviewContainer: View {
             SourcesSidebarView(
                 sources: PreviewFixtures.allSources,
                 connectedDevices: [],
+                sourceCandidates: [],
+                isDiscoveringSourceCandidates: false,
                 selection: $selection,
                 addSourceAction: {},
+                discoverSourcesAction: {},
+                addCandidateSourceAction: { _ in },
                 addDeviceSourceAction: {},
                 addConnectedDeviceAction: { _ in },
                 rescanSourceAction: { _ in },
                 removeSourceAction: { _ in },
-                importSourceAction: { _ in },
-                importDropAction: { _, _ in false },
-                installationState: { _ in nil },
                 filters: { source in
                     let allFilter = SidebarFilter(
                         title: "All Content",
@@ -334,7 +422,6 @@ struct ItemListColumnPreviewContainer: View {
                 searchPrompt: "Search Worlds",
                 chooseFolderAction: {},
                 dropAction: { _ in false },
-                dragProvider: { _ in NSItemProvider() },
                 itemContextMenu: { item in
                     Button("Reveal \(item.displayName)") {}
                 }
@@ -349,7 +436,8 @@ struct ItemDetailColumnPreviewContainer: View {
             ItemDetailColumnView(
                 item: PreviewFixtures.featuredWorld,
                 source: PreviewFixtures.primarySource,
-                installationState: nil,
+                sourceCandidate: nil,
+                connectedDevice: nil,
                 showsSourceDetails: false,
                 behaviorPacks: PreviewFixtures.primarySource.resolvedPackReferences(for: PreviewFixtures.featuredWorld.id, type: .behaviorPack),
                 resourcePacks: PreviewFixtures.primarySource.resolvedPackReferences(for: PreviewFixtures.featuredWorld.id, type: .resourcePack),
@@ -365,7 +453,9 @@ struct ItemDetailColumnPreviewContainer: View {
                 exportAction: {},
                 revealAction: {},
                 shareAction: { _ in },
-                importAction: { _ in }
+                addCandidateSourceAction: { _ in },
+                revealCandidateAction: { _ in },
+                addConnectedDeviceAction: { _ in }
             )
         }
     }

World Manager for Minecraft/UI/Root/ContentView.swift

@@ -14,7 +14,6 @@ struct ContentView: View {
     @State private var isDropTargeted = false
     @State private var isPerformingItemAction = false
     @State private var isShowingDeviceSourceSheet = false
-    @State private var importErrorMessage: String?
     @State private var sortMode: ItemSortMode = .name
     @State private var directoryPreviewContents: [DirectoryEntry] = []
     @State private var showsProjectionLoadingState = false
@@ -33,19 +32,26 @@ struct ContentView: View {
     private let directoryPreviewLimit = 12
     private let projectionLoadingDelay: Duration = .milliseconds(150)
 
-    init() {
-        let dependencies = ContentViewDependencies.makeDefault()
+    init(
+        dependencies: ContentViewDependencies = ContentViewDependencies.makeDefault(),
+        initialSidebarSelection: SidebarSelection? = nil,
+        initialItemID: MinecraftContentItem.ID? = nil
+    ) {
         self.connectedDeviceAccess = dependencies.connectedDeviceAccess
         self.deviceSourceFactory = dependencies.deviceSourceFactory
         self.itemActionService = dependencies.itemActionService
         _library = StateObject(
             wrappedValue: dependencies.library
         )
+        _selectedSidebarSelection = State(initialValue: initialSidebarSelection)
+        _selectedItemID = State(initialValue: initialItemID)
     }
 
     var body: some View {
-        let isEmptyLibrary = library.visibleSources.isEmpty && library.connectedDevices.isEmpty
+        let isEmptyLibrary = library.visibleSources.isEmpty && library.sidebarConnectedDevices.isEmpty && library.sourceCandidates.isEmpty
         let resolvedCurrentSource = currentSource
+        let resolvedCurrentSourceCandidate = currentSourceCandidate
+        let resolvedCurrentConnectedDevice = currentConnectedDevice
         let currentProjectionRequest = ItemCollectionProjectionRequest(
             selection: selectedSidebarSelection,
             searchText: searchText,
@@ -75,9 +81,15 @@ struct ContentView: View {
         NavigationSplitView(columnVisibility: $columnVisibility) {
             SourcesSidebarView(
                 sources: library.sidebarSources,
-                connectedDevices: library.connectedDevices,
+                connectedDevices: library.sidebarConnectedDevices,
+                sourceCandidates: library.sourceCandidates,
+                isDiscoveringSourceCandidates: library.isDiscoveringSourceCandidates,
                 selection: sidebarSelectionBinding,
                 addSourceAction: pickFolder,
+                discoverSourcesAction: {
+                    library.perform(.discoverSourceCandidates)
+                },
+                addCandidateSourceAction: addCandidateSource(_:),
                 addDeviceSourceAction: { isShowingDeviceSourceSheet = true },
                 addConnectedDeviceAction: addConnectedDeviceSource(from:),
                 rescanSourceAction: { source in
@@ -88,11 +100,6 @@ struct ContentView: View {
                 removeSourceAction: { source in
                     removeSource(source.id)
                 },
-                importSourceAction: importIntoSource(_:),
-                importDropAction: handleImportDrop(on:providers:),
-                installationState: { source in
-                    library.installationStateBySourceID[source.id]
-                },
                 filters: sidebarFilters(for:)
             )
             .navigationSplitViewColumnWidth(min: 280, ideal: 320, max: 380)
@@ -115,7 +122,6 @@ struct ContentView: View {
                 searchPrompt: resolvedItemListProjection.searchPrompt,
                 chooseFolderAction: pickFolder,
                 dropAction: handleDroppedProviders(_:),
-                dragProvider: dragProvider(for:),
                 itemContextMenu: itemContextMenu(for:)
             )
             .navigationSplitViewColumnWidth(min: 340, ideal: 400, max: 460)
@@ -123,7 +129,8 @@ struct ContentView: View {
             ItemDetailColumnView(
                 item: resolvedCurrentSelectedItem,
                 source: resolvedCurrentSource,
-                installationState: resolvedCurrentSource.flatMap { library.installationStateBySourceID[$0.id] },
+                sourceCandidate: resolvedCurrentSourceCandidate,
+                connectedDevice: resolvedCurrentConnectedDevice,
                 showsSourceDetails: resolvedCurrentSelectedItem == nil && isSourceOverviewSelection,
                 behaviorPacks: resolvedCurrentSelectedItem.map { logicalPackReferences(for: $0, type: .behaviorPack) } ?? [],
                 resourcePacks: resolvedCurrentSelectedItem.map { logicalPackReferences(for: $0, type: .resourcePack) } ?? [],
@@ -157,7 +164,9 @@ struct ContentView: View {
 
                     shareItem(item, from: anchorView)
                 },
-                importAction: importIntoSource(_:)
+                addCandidateSourceAction: addCandidateSource(_:),
+                revealCandidateAction: revealCandidateInFinder(_:),
+                addConnectedDeviceAction: addConnectedDeviceSource(from:)
             )
             .frame(minWidth: 450)
         }
@@ -178,23 +187,6 @@ struct ContentView: View {
                 }
             )
         }
-        .alert(
-            "Import Failed",
-            isPresented: Binding(
-                get: { importErrorMessage != nil },
-                set: { isPresented in
-                    if !isPresented {
-                        importErrorMessage = nil
-                    }
-                }
-            )
-        ) {
-            Button("OK") {
-                importErrorMessage = nil
-            }
-        } message: {
-            Text(importErrorMessage ?? "The Minecraft content could not be imported.")
-        }
         .task {
             AppTerminationCoordinator.shared.register(library: library)
         }
@@ -209,7 +201,7 @@ struct ContentView: View {
         .onChange(of: library.sources.map(\.id)) { _, _ in
             syncSelection(with: library.visibleSources.map(\.id))
         }
-        .onChange(of: library.connectedDevices.map { "\($0.id)::\($0.matchedSourceID?.absoluteString ?? "nil")" }) { _, _ in
+        .onChange(of: library.sidebarConnectedDevices.map { "\($0.id)::\($0.matchedSourceID?.absoluteString ?? "nil")" }) { _, _ in
             syncSelection(with: library.visibleSources.map(\.id))
         }
         .task(id: currentProjectionRequest) {
@@ -275,6 +267,22 @@ struct ContentView: View {
         return library.source(withID: sourceID)
     }
 
+    private var currentSourceCandidate: SourceCandidate? {
+        guard case .sourceCandidate(let candidateID) = selectedSidebarSelection else {
+            return nil
+        }
+
+        return library.sourceCandidates.first { $0.id == candidateID }
+    }
+
+    private var currentConnectedDevice: ConnectedDeviceSidebarEntry? {
+        guard case .connectedDevice(let deviceID) = selectedSidebarSelection else {
+            return nil
+        }
+
+        return library.sidebarConnectedDevices.first { $0.id == deviceID }
+    }
+
     private func currentSelectedItem(in source: MinecraftSource?) -> MinecraftContentItem? {
         guard let selectedItemID else {
             return nil
@@ -357,16 +365,27 @@ struct ContentView: View {
     }
 
     private func sidebarFilters(for source: MinecraftSource) -> [SidebarFilter] {
-        return MinecraftContentType.allCases.compactMap { contentType in
-            guard let count = source.displayItemCountsByType[contentType], count > 0 else {
+        let orderedKinds: [MinecraftContentKind] = [
+            .world,
+            .behaviorPack,
+            .resourcePack,
+            .dataPack,
+            .skinPack,
+            .worldTemplate,
+            .shaderPack,
+            .mod
+        ]
+
+        return orderedKinds.compactMap { contentKind in
+            guard let count = source.displayItemCountsByKind[contentKind], count > 0 else {
                 return nil
             }
 
             return SidebarFilter(
-                title: sidebarTitle(for: contentType),
-                iconName: sidebarIcon(for: contentType),
+                title: sidebarTitle(for: contentKind),
+                iconName: sidebarIcon(for: contentKind),
                 count: count,
-                selection: .contentType(sourceID: source.id, contentType: contentType)
+                selection: .contentKind(sourceID: source.id, contentKind: contentKind)
             )
         }
     }
@@ -398,6 +417,27 @@ struct ContentView: View {
         }
     }
 
+    private func sidebarTitle(for contentKind: MinecraftContentKind) -> String {
+        switch contentKind {
+        case .world:
+            return "Worlds"
+        case .behaviorPack:
+            return "Behavior Packs"
+        case .resourcePack:
+            return "Resource Packs"
+        case .dataPack:
+            return "Data Packs"
+        case .skinPack:
+            return "Skin Packs"
+        case .worldTemplate:
+            return "World Templates"
+        case .shaderPack:
+            return "Shader Packs"
+        case .mod:
+            return "Mods"
+        }
+    }
+
     private func sidebarIcon(for contentType: MinecraftContentType) -> String {
         switch contentType {
         case .world:
@@ -413,6 +453,27 @@ struct ContentView: View {
         }
     }
 
+    private func sidebarIcon(for contentKind: MinecraftContentKind) -> String {
+        switch contentKind {
+        case .world:
+            return "globe.europe.africa"
+        case .behaviorPack:
+            return "shippingbox"
+        case .resourcePack:
+            return "paintpalette"
+        case .dataPack:
+            return "curlybraces.square"
+        case .skinPack:
+            return "person.crop.square"
+        case .worldTemplate:
+            return "map"
+        case .shaderPack:
+            return "camera.filters"
+        case .mod:
+            return "hammer"
+        }
+    }
+
     @ViewBuilder
     private func itemContextMenu(for item: MinecraftContentItem) -> some View {
         Button("Share...") {
@@ -547,169 +608,23 @@ struct ContentView: View {
         }
 
         for url in panel.urls {
-            let sourceID = library.addSource(at: url)
-            selectSourceIfNeeded(sourceID)
-        }
-    }
-
-    private func importIntoSource(_ source: MinecraftSource) {
-        guard source.availability == .available, source.capabilities.canInstallItems else {
-            return
-        }
-
-        let panel = NSOpenPanel()
-        panel.allowsMultipleSelection = true
-        panel.canChooseDirectories = false
-        panel.canChooseFiles = true
-        panel.title = "Import Minecraft Content into \(source.displayName)"
-        panel.prompt = "Import"
-        panel.allowedContentTypes = [
-            .minecraftWorld,
-            .minecraftPack,
-            .minecraftTemplate,
-            .minecraftAddon
-        ]
-
-        guard panel.runModal() == .OK else {
-            return
-        }
-        Task {
-            await performImport(packageURLs: panel.urls, into: source.id)
-        }
-    }
-
-    private func handleImportDrop(
-        on source: MinecraftSource,
-        providers: [NSItemProvider]
-    ) -> Bool {
-        guard
-            source.availability == .available,
-            source.capabilities.canInstallItems,
-            providers.contains(where: isSupportedImportProvider(_:))
-        else {
-            return false
-        }
-
-        Task {
-            let materializedDrop = await materializeDroppedPackages(from: providers)
-            defer {
-                try? FileManager.default.removeItem(at: materializedDrop.temporaryRootURL)
+            Task { @MainActor in
+                let sourceID = await library.addSource(at: url)
+                selectSourceIfNeeded(sourceID)
             }
-            guard !materializedDrop.packageURLs.isEmpty else {
-                await MainActor.run {
-                    importErrorMessage = "The dropped items did not contain a supported .mcworld, .mcpack, .mctemplate, or .mcaddon file."
-                }
-                return
-            }
-            await performImport(packageURLs: materializedDrop.packageURLs, into: source.id)
         }
-        return true
     }
 
-    @MainActor
-    private func performImport(packageURLs: [URL], into sourceID: URL) async {
-        do {
-            _ = try await library.installPackages(at: packageURLs, into: sourceID)
+    private func addCandidateSource(_ candidate: SourceCandidate) {
+        Task {
+            let sourceID = await library.addSource(candidate: candidate)
             selectedSidebarSelection = .source(sourceID: sourceID)
             selectedItemID = nil
-        } catch {
-            importErrorMessage = error.localizedDescription
         }
     }
 
-    private func isSupportedImportProvider(_ provider: NSItemProvider) -> Bool {
-        importTypeIdentifiers.contains {
-            provider.hasItemConformingToTypeIdentifier($0)
-        }
-    }
-
-    private var importTypeIdentifiers: [String] {
-        [
-            UTType.minecraftWorld.identifier,
-            UTType.minecraftPack.identifier,
-            UTType.minecraftTemplate.identifier,
-            UTType.minecraftAddon.identifier,
-            UTType.fileURL.identifier
-        ]
-    }
-
-    private func materializeDroppedPackages(
-        from providers: [NSItemProvider]
-    ) async -> (packageURLs: [URL], temporaryRootURL: URL) {
-        let temporaryRootURL = FileManager.default.temporaryDirectory
-            .appendingPathComponent("MinecraftImportDrop", isDirectory: true)
-            .appendingPathComponent(UUID().uuidString, isDirectory: true)
-        try? FileManager.default.createDirectory(at: temporaryRootURL, withIntermediateDirectories: true)
-
-        var packageURLs: [URL] = []
-        for provider in providers where isSupportedImportProvider(provider) {
-            if let packageURL = await materializeDroppedPackage(
-                from: provider,
-                in: temporaryRootURL
-            ) {
-                packageURLs.append(packageURL)
-            }
-        }
-        return (packageURLs, temporaryRootURL)
-    }
-
-    private func materializeDroppedPackage(
-        from provider: NSItemProvider,
-        in temporaryRootURL: URL
-    ) async -> URL? {
-        let packageDefinitions = MinecraftPackageTypes.all
-        if let definition = packageDefinitions.first(where: {
-            provider.hasItemConformingToTypeIdentifier($0.utTypeIdentifier)
-        }) {
-            return await withCheckedContinuation { continuation in
-                provider.loadFileRepresentation(forTypeIdentifier: definition.utTypeIdentifier) { url, _ in
-                    guard let url else {
-                        continuation.resume(returning: nil)
-                        return
-                    }
-                    let baseName = provider.suggestedName.map {
-                        URL(fileURLWithPath: $0).deletingPathExtension().lastPathComponent
-                    } ?? UUID().uuidString
-                    let destinationURL = temporaryRootURL
-                        .appendingPathComponent(baseName)
-                        .appendingPathExtension(definition.pathExtension)
-                    do {
-                        try FileManager.default.copyItem(at: url, to: destinationURL)
-                        continuation.resume(returning: destinationURL)
-                    } catch {
-                        continuation.resume(returning: nil)
-                    }
-                }
-            }
-        }
-
-        guard provider.hasItemConformingToTypeIdentifier(UTType.fileURL.identifier) else {
-            return nil
-        }
-        return await withCheckedContinuation { continuation in
-            provider.loadDataRepresentation(forTypeIdentifier: UTType.fileURL.identifier) { data, _ in
-                guard
-                    let data,
-                    let sourceURL = NSURL(
-                        absoluteURLWithDataRepresentation: data,
-                        relativeTo: nil
-                    ) as URL?,
-                    MinecraftPackageInspector.supportedPathExtensions.contains(
-                        sourceURL.pathExtension.lowercased()
-                    )
-                else {
-                    continuation.resume(returning: nil)
-                    return
-                }
-                let destinationURL = temporaryRootURL.appendingPathComponent(sourceURL.lastPathComponent)
-                do {
-                    try FileManager.default.copyItem(at: sourceURL, to: destinationURL)
-                    continuation.resume(returning: destinationURL)
-                } catch {
-                    continuation.resume(returning: nil)
-                }
-            }
-        }
+    private func revealCandidateInFinder(_ candidate: SourceCandidate) {
+        NSWorkspace.shared.activateFileViewerSelecting([candidate.sourceRootURL])
     }
 
     private func handleDroppedProviders(_ providers: [NSItemProvider]) -> Bool {
@@ -729,7 +644,7 @@ struct ContentView: View {
                 }
 
                 Task { @MainActor in
-                    let sourceID = library.addSource(at: url)
+                    let sourceID = await library.addSource(at: url)
                     selectSourceIfNeeded(sourceID)
                 }
             }
@@ -771,8 +686,22 @@ struct ContentView: View {
     }
 
     private func syncSelection(with sourceIDs: [URL]) {
-        if let selectedSidebarSelection, !sourceIDs.contains(selectedSidebarSelection.sourceID) {
-            self.selectedSidebarSelection = sourceIDs.first.map { .source(sourceID: $0) }
+        if let selectedSidebarSelection {
+            switch selectedSidebarSelection {
+            case .sourceCandidate(let candidateID):
+                if !library.sourceCandidates.contains(where: { $0.id == candidateID }) {
+                    self.selectedSidebarSelection = sourceIDs.first.map { .source(sourceID: $0) }
+                }
+            case .connectedDevice(let deviceID):
+                if !library.sidebarConnectedDevices.contains(where: { $0.id == deviceID }) {
+                    self.selectedSidebarSelection = sourceIDs.first.map { .source(sourceID: $0) }
+                }
+            case .source, .allContent, .contentType, .contentKind:
+                if let selectedSourceID = selectedSidebarSelection.sourceID,
+                   !sourceIDs.contains(selectedSourceID) {
+                    self.selectedSidebarSelection = sourceIDs.first.map { .source(sourceID: $0) }
+                }
+            }
         } else if self.selectedSidebarSelection == nil, let firstSourceID = sourceIDs.first {
             self.selectedSidebarSelection = .source(sourceID: firstSourceID)
         }
@@ -953,7 +882,7 @@ struct ContentView: View {
     }
 
     private func archiveType(for item: MinecraftContentItem) -> UTType {
-        UTType(filenameExtension: item.contentType.archiveExtension) ?? .data
+        itemActionService.archiveContentType(for: item)
     }
 
     private func dragProvider(for item: MinecraftContentItem) -> NSItemProvider {
@@ -995,8 +924,19 @@ struct ContentView: View {
     }
 }
 
+#if DEBUG
 struct ContentView_Previews: PreviewProvider {
     static var previews: some View {
-        ContentView()
+        ContentView(
+            dependencies: .makePreview(),
+            initialSidebarSelection: .contentKind(
+                sourceID: PreviewFixtures.primarySource.id,
+                contentKind: .world
+            ),
+            initialItemID: PreviewFixtures.featuredWorld.id
+        )
+        .frame(width: 1_440, height: 900)
+        .previewDisplayName("Full Window")
     }
 }
+#endif

World Manager for Minecraft/UI/Root/ItemCollectionProjection.swift

@@ -77,21 +77,31 @@ enum ItemCollectionProjector {
         }
 
         switch selection {
+        case .sourceCandidate:
+            return "Source Candidate"
+        case .connectedDevice:
+            return "Connected Device"
         case .source, .allContent:
             return "All Items"
         case .contentType(_, let contentType):
             return sidebarTitle(for: contentType)
+        case .contentKind(_, let contentKind):
+            return sidebarTitle(for: contentKind)
         }
     }
 
     nonisolated static func searchPrompt(for selection: SidebarSelection?, source: MinecraftSource?) -> String {
         switch selection {
+        case .some(.sourceCandidate), .some(.connectedDevice):
+            return "Search Library"
         case .some(.source):
             return "Search \(source?.displayName ?? "Library")"
         case .some(.allContent):
             return "Search All Items"
         case .some(.contentType(_, let contentType)):
             return "Search \(sidebarTitle(for: contentType))"
+        case .some(.contentKind(_, let contentKind)):
+            return "Search \(sidebarTitle(for: contentKind))"
         case .none:
             return "Search Library"
         }
@@ -99,12 +109,18 @@ enum ItemCollectionProjector {
 
     nonisolated private static func searchScopeTitle(for selection: SidebarSelection?) -> String {
         switch selection {
+        case .some(.sourceCandidate):
+            return "Source Candidate"
+        case .some(.connectedDevice):
+            return "Connected Device"
         case .some(.source):
             return "Library"
         case .some(.allContent):
             return "All"
         case .some(.contentType(_, let contentType)):
             return sidebarTitle(for: contentType)
+        case .some(.contentKind(_, let contentKind)):
+            return sidebarTitle(for: contentKind)
         case .none:
             return "Library"
         }
@@ -116,6 +132,8 @@ enum ItemCollectionProjector {
         }
 
         switch selection {
+        case .sourceCandidate, .connectedDevice:
+            return "items"
         case .source, .allContent:
             return scopedItemCount == 1 ? "item" : "items"
         case .contentType(_, let contentType):
@@ -125,6 +143,17 @@ enum ItemCollectionProjector {
             case .behaviorPack, .resourcePack, .skinPack, .worldTemplate:
                 return scopedItemCount == 1 ? "pack" : "packs"
             }
+        case .contentKind(_, let contentKind):
+            switch contentKind {
+            case .world:
+                return scopedItemCount == 1 ? "world" : "worlds"
+            case .mod:
+                return scopedItemCount == 1 ? "mod" : "mods"
+            case .shaderPack:
+                return scopedItemCount == 1 ? "shader pack" : "shader packs"
+            case .behaviorPack, .resourcePack, .dataPack, .skinPack, .worldTemplate:
+                return scopedItemCount == 1 ? "pack" : "packs"
+            }
         }
     }
 
@@ -143,6 +172,27 @@ enum ItemCollectionProjector {
         }
     }
 
+    nonisolated private static func sidebarTitle(for contentKind: MinecraftContentKind) -> String {
+        switch contentKind {
+        case .world:
+            return "Worlds"
+        case .behaviorPack:
+            return "Behavior Packs"
+        case .resourcePack:
+            return "Resource Packs"
+        case .dataPack:
+            return "Data Packs"
+        case .skinPack:
+            return "Skin Packs"
+        case .worldTemplate:
+            return "World Templates"
+        case .shaderPack:
+            return "Shader Packs"
+        case .mod:
+            return "Mods"
+        }
+    }
+
     nonisolated static func trimmedSearchText(for request: ItemCollectionProjectionRequest) -> String {
         request.searchText.trimmingCharacters(in: .whitespacesAndNewlines)
     }

World Manager for Minecraft/UI/Shared/ContentUIShared.swift

@@ -160,6 +160,7 @@ private struct AppTransportBadgeBubbleModifier: ViewModifier {
 enum AppCapsuleLabelStyle {
     case sidebarSubtle
     case sidebarAccent
+    case sidebarSelected
     case heroMetadata
 }
 
@@ -181,6 +182,8 @@ private struct AppCapsuleLabelModifier: ViewModifier {
             return AnyShapeStyle(.secondary)
         case .sidebarAccent:
             return AnyShapeStyle(Color.appAccent)
+        case .sidebarSelected:
+            return AnyShapeStyle(.white.opacity(0.92))
         case .heroMetadata:
             return AnyShapeStyle(.white.opacity(0.95))
         }
@@ -192,6 +195,8 @@ private struct AppCapsuleLabelModifier: ViewModifier {
             return AnyShapeStyle(.secondary.opacity(0.12))
         case .sidebarAccent:
             return AnyShapeStyle(Color.appAccent.opacity(0.14))
+        case .sidebarSelected:
+            return AnyShapeStyle(.white.opacity(0.16))
         case .heroMetadata:
             return AnyShapeStyle(.white.opacity(0.14))
         }
@@ -201,7 +206,7 @@ private struct AppCapsuleLabelModifier: ViewModifier {
         switch style {
         case .heroMetadata:
             return 10
-        case .sidebarSubtle, .sidebarAccent:
+        case .sidebarSubtle, .sidebarAccent, .sidebarSelected:
             return 7
         }
     }
@@ -210,7 +215,7 @@ private struct AppCapsuleLabelModifier: ViewModifier {
         switch style {
         case .heroMetadata:
             return 7
-        case .sidebarSubtle, .sidebarAccent:
+        case .sidebarSubtle, .sidebarAccent, .sidebarSelected:
             return 4
         }
     }

World Manager for Minecraft/UI/Sidebar/SidebarColumnViews.swift

@@ -2,17 +2,21 @@
 // SPDX-License-Identifier: AGPL-3.0-or-later
 
 import SwiftUI
-import UniformTypeIdentifiers
 
 enum SidebarSelection: Hashable, Sendable {
     case source(sourceID: URL)
+    case sourceCandidate(candidateID: String)
+    case connectedDevice(deviceID: String)
     case allContent(sourceID: URL)
     case contentType(sourceID: URL, contentType: MinecraftContentType)
+    case contentKind(sourceID: URL, contentKind: MinecraftContentKind)
 
-    var sourceID: URL {
+    var sourceID: URL? {
         switch self {
-        case .source(let sourceID), .allContent(let sourceID), .contentType(let sourceID, _):
+        case .source(let sourceID), .allContent(let sourceID), .contentType(let sourceID, _), .contentKind(let sourceID, _):
             return sourceID
+        case .sourceCandidate, .connectedDevice:
+            return nil
         }
     }
 }
@@ -25,44 +29,80 @@ struct SidebarFilter: Identifiable, Hashable {
     let selection: SidebarSelection
 }
 
+private struct SidebarNode: Identifiable, Hashable {
+    let id: SidebarSelection
+    let row: SidebarNodeRow
+    let children: [SidebarNode]?
+
+    var selection: SidebarSelection { id }
+}
+
+private enum SidebarNodeRow: Hashable {
+    case source(MinecraftSource)
+    case filter(SidebarFilter)
+    case connectedDevice(ConnectedDeviceSidebarEntry)
+    case sourceCandidate(SourceCandidate)
+}
+
 struct SourcesSidebarView: View {
     let sources: [MinecraftSource]
     let connectedDevices: [ConnectedDeviceSidebarEntry]
+    let sourceCandidates: [SourceCandidate]
+    let isDiscoveringSourceCandidates: Bool
     @Binding var selection: SidebarSelection?
     let addSourceAction: () -> Void
+    let discoverSourcesAction: () -> Void
+    let addCandidateSourceAction: (SourceCandidate) -> Void
     let addDeviceSourceAction: () -> Void
     let addConnectedDeviceAction: (ConnectedDeviceSidebarEntry) -> Void
     let rescanSourceAction: (MinecraftSource) -> Void
     let removeSourceAction: (MinecraftSource) -> Void
-    let importSourceAction: (MinecraftSource) -> Void
-    let importDropAction: (MinecraftSource, [NSItemProvider]) -> Bool
-    let installationState: (MinecraftSource) -> SourceInstallationState?
     let filters: (MinecraftSource) -> [SidebarFilter]
 
     var body: some View {
         List(selection: $selection) {
-            if !sources.isEmpty {
+            if !libraryNodes.isEmpty {
                 Section {
-                    ForEach(sources) { source in
-                        sourceSectionRows(for: source)
-                    }
+                    OutlineGroup(libraryNodes, children: \.children, content: sidebarNodeRow)
                 } header: {
                     SidebarSourcesSectionHeaderView(title: "Libraries")
                 }
             }
 
-            if !connectedDevices.isEmpty {
+            if !deviceNodes.isEmpty {
                 Section {
-                    ForEach(connectedDevices) { entry in
-                        connectedDeviceSectionRows(for: entry)
-                    }
+                    OutlineGroup(deviceNodes, children: \.children, content: sidebarNodeRow)
                 } header: {
                     SidebarSourcesSectionHeaderView(title: "Available Devices")
                 }
             }
+
+            if !candidateNodes.isEmpty {
+                Section {
+                    OutlineGroup(candidateNodes, children: \.children, content: sidebarNodeRow)
+                } header: {
+                    SidebarSourcesSectionHeaderView(title: "Found Sources")
+                }
+            }
         }
         .listStyle(.sidebar)
+        .transaction { transaction in
+            transaction.animation = nil
+        }
         .toolbar {
+            ToolbarItem {
+                Button(action: discoverSourcesAction) {
+                    if isDiscoveringSourceCandidates {
+                        ProgressView()
+                            .appActivityIndicatorStyle(.small)
+                    } else {
+                        Image(systemName: "magnifyingglass")
+                    }
+                }
+                .disabled(isDiscoveringSourceCandidates)
+                .help("Find Minecraft Sources")
+            }
+
             ToolbarItem {
                 Button(action: addSourceAction) {
                     Image(systemName: "folder.badge.plus")
@@ -79,77 +119,151 @@ struct SourcesSidebarView: View {
         }
     }
 
-    @ViewBuilder
-    private func sourceSectionRows(for source: MinecraftSource) -> some View {
-        let sourceFilters = filters(source)
-
-        SourceHeaderRow(
-            source: source,
-            installationState: installationState(source),
-            onSelect: {
-                selection = .source(sourceID: source.id)
-            },
-            dropAction: { providers in
-                importDropAction(source, providers)
-            }
-        )
-            .tag(SidebarSelection.source(sourceID: source.id) as SidebarSelection?)
-            .listRowSeparator(.hidden)
-            .listRowInsets(EdgeInsets(top: 6, leading: 0, bottom: 0, trailing: 0))
-            .contextMenu {
-                Button("Rescan \"\(source.displayName)\"") {
-                    rescanSourceAction(source)
-                }
-
-                Button("Import into \"\(source.displayName)\"...") {
-                    importSourceAction(source)
-                }
-                .disabled(source.availability != .available || !source.capabilities.canInstallItems)
-
-                Divider()
-
-                Button("Remove \"\(source.displayName)\"", role: .destructive) {
-                    removeSourceAction(source)
-                }
+    private var libraryNodes: [SidebarNode] {
+        sources.map { source in
+            let childNodes = filters(source).map { filter in
+                SidebarNode(
+                    id: filter.selection,
+                    row: .filter(filter),
+                    children: nil
+                )
             }
 
-        ForEach(sourceFilters) { filter in
-            SidebarFilterRow(filter: filter, isIndented: true)
-                .tag(filter.selection as SidebarSelection?)
+            return SidebarNode(
+                id: .source(sourceID: source.id),
+                row: .source(source),
+                children: childNodes.isEmpty ? nil : childNodes
+            )
+        }
+    }
+
+    private var deviceNodes: [SidebarNode] {
+        connectedDevices.map { entry in
+            SidebarNode(
+                id: .connectedDevice(deviceID: entry.id),
+                row: .connectedDevice(entry),
+                children: nil
+            )
+        }
+    }
+
+    private var candidateNodes: [SidebarNode] {
+        sourceCandidates.map { candidate in
+            SidebarNode(
+                id: .sourceCandidate(candidateID: candidate.id),
+                row: .sourceCandidate(candidate),
+                children: nil
+            )
         }
     }
 
     @ViewBuilder
-    private func connectedDeviceSectionRows(for entry: ConnectedDeviceSidebarEntry) -> some View {
-        ConnectedDeviceRow(
-            entry: entry,
-            addAction: entry.hasMinecraftContainer ? {
-                addConnectedDeviceAction(entry)
-            } : nil
-        )
-        .listRowSeparator(.hidden)
-        .listRowInsets(EdgeInsets(top: 6, leading: 8, bottom: 0, trailing: 8))
+    private func sidebarNodeRow(_ node: SidebarNode) -> some View {
+        switch node.row {
+        case .source(let source):
+            SourceHeaderRow(source: source, isSelected: selection == node.selection)
+                .tag(node.selection as SidebarSelection?)
+                .listRowSeparator(.hidden)
+                .contextMenu {
+                    Button("Rescan \"\(source.displayName)\"") {
+                        rescanSourceAction(source)
+                    }
+
+                    Divider()
+
+                    Button("Remove \"\(source.displayName)\"", role: .destructive) {
+                        removeSourceAction(source)
+                    }
+                }
+        case .filter(let filter):
+            SidebarFilterRow(filter: filter)
+                .tag(node.selection as SidebarSelection?)
+        case .connectedDevice(let entry):
+            ConnectedDeviceRow(
+                entry: entry,
+                addAction: entry.hasMinecraftContainer ? {
+                    addConnectedDeviceAction(entry)
+                } : nil
+            )
+            .tag(node.selection as SidebarSelection?)
+            .listRowSeparator(.hidden)
+        case .sourceCandidate(let candidate):
+            SourceCandidateRow(
+                candidate: candidate,
+                addAction: {
+                    addCandidateSourceAction(candidate)
+                }
+            )
+            .tag(node.selection as SidebarSelection?)
+            .listRowSeparator(.hidden)
+        }
+    }
+}
+
+private struct SourceCandidateRow: View {
+    let candidate: SourceCandidate
+    let addAction: () -> Void
+
+    var body: some View {
+        HStack(spacing: 8) {
+            Label {
+                VStack(alignment: .leading, spacing: 2) {
+                    Text(candidate.displayName)
+                        .lineLimit(1)
+
+                    Text(subtitle)
+                        .font(.caption)
+                        .foregroundStyle(.secondary)
+                        .lineLimit(1)
+                }
+            } icon: {
+                Image(systemName: symbolName)
+                    .foregroundStyle(.secondary)
+            }
+
+            Spacer(minLength: 8)
+
+            Button(action: addAction) {
+                Text("Add")
+            }
+            .appMiniProminentButton()
+            .help("Add Source")
+        }
+        .padding(.vertical, 4)
+    }
+
+    private var symbolName: String {
+        switch candidate.edition {
+        case .bedrock:
+            return "folder"
+        case .java:
+            return "curlybraces"
+        }
+    }
+
+    private var subtitle: String {
+        let editionName = candidate.edition == .java ? "Java" : "Bedrock"
+        return "\(editionName) - \(candidate.sourceRootURL.lastPathComponent)"
     }
 }
 
 private struct SidebarFilterRow: View {
     let filter: SidebarFilter
-    let isIndented: Bool
 
     var body: some View {
-        HStack(spacing: 10) {
-            Image(systemName: filter.iconName)
-                .frame(width: 16)
-                .foregroundStyle(.secondary)
-
-            Text(filter.title)
+        HStack {
+            Label {
+                Text(filter.title)
+            } icon: {
+                Image(systemName: filter.iconName)
+                    .foregroundStyle(.secondary)
+            }
 
             Spacer()
 
             Text(filter.count, format: .number)
                 .foregroundStyle(.secondary)
         }
-        .padding(.leading, isIndented ? 16 : 0)
     }
 }
 
@@ -163,28 +277,31 @@ private struct SidebarSourcesSectionHeaderView: View {
 
 private struct SourceHeaderRow: View {
     let source: MinecraftSource
-    let installationState: SourceInstallationState?
-    let onSelect: () -> Void
-    let dropAction: ([NSItemProvider]) -> Bool
-    @State private var isDropTargeted = false
+    let isSelected: Bool
 
     var body: some View {
-        HStack(spacing: 8) {
-            Image(systemName: headerSymbolName)
-                .foregroundStyle(.secondary)
-
-            Text(source.displayName)
-                .lineLimit(1)
+        HStack {
+            Label {
+                Text(source.displayName)
+                    .lineLimit(1)
+            } icon: {
+                Image(systemName: headerSymbolName)
+                    .foregroundStyle(.secondary)
+            }
 
             Spacer(minLength: 8)
 
             HStack(spacing: 8) {
                 if let availabilityBadgeText {
-                    SourceAvailabilityBadge(text: availabilityBadgeText, emphasis: availabilityBadgeEmphasis)
+                    SourceAvailabilityBadge(
+                        text: availabilityBadgeText,
+                        emphasis: availabilityBadgeEmphasis,
+                        isSelected: isSelected
+                    )
                 }
 
                 if let connection {
-                    SourceConnectionBadge(connection: connection)
+                    SourceConnectionBadge(connection: connection, isSelected: isSelected)
                 }
 
                 if showsStatusAccessory {
@@ -193,25 +310,6 @@ private struct SourceHeaderRow: View {
             }
         }
         .frame(maxWidth: .infinity, alignment: .leading)
-        .padding(.leading, 5)
-        .padding(.vertical, 6)
-        .background(
-            isDropTargeted ? Color.accentColor.opacity(0.16) : Color.clear,
-            in: RoundedRectangle(cornerRadius: 7, style: .continuous)
-        )
-        .contentShape(Rectangle())
-        .onTapGesture(perform: onSelect)
-        .onDrop(
-            of: [
-                UTType.fileURL.identifier,
-                UTType.minecraftWorld.identifier,
-                UTType.minecraftPack.identifier,
-                UTType.minecraftTemplate.identifier,
-                UTType.minecraftAddon.identifier
-            ],
-            isTargeted: $isDropTargeted,
-            perform: dropAction
-        )
     }
 
     private var connection: DeviceConnection? {
@@ -228,7 +326,7 @@ private struct SourceHeaderRow: View {
 
     private var headerSymbolName: String {
         switch source.origin {
-        case .localFolder:
+        case .localFolder, .javaLocalFolder:
             return "folder"
         case .connectedDevice:
             return "iphone.gen3"
@@ -255,39 +353,29 @@ private struct SourceHeaderRow: View {
     }
 
     private var showsStatusAccessory: Bool {
-        source.isScanning || installationState != nil
+        source.isScanning
     }
 
     @ViewBuilder
     private var statusAccessory: some View {
-            if let installationState {
-                if installationState.totalCount > 0 {
-                    CircularScanProgressView(
-                        progress: Double(installationState.completedCount) / Double(installationState.totalCount)
-                    )
-                    .help(installationState.status)
-                } else {
-                    ProgressView()
-                        .appActivityIndicatorStyle(.small)
-                        .help(installationState.status)
-                }
-            } else if source.isScanning {
-                if let scanProgress = source.scanProgress {
-                    CircularScanProgressView(progress: scanProgress)
-                } else {
-                    ProgressView()
-                        .appActivityIndicatorStyle(.small)
-                }
+        if source.isScanning {
+            if let scanProgress = source.scanProgress {
+                CircularScanProgressView(progress: scanProgress, isSelected: isSelected)
+            } else {
+                ProgressView()
+                    .appActivityIndicatorStyle(.small)
             }
         }
+    }
 }
 
 private struct SourceConnectionBadge: View {
     let connection: DeviceConnection
+    let isSelected: Bool
 
     var body: some View {
         Image(systemName: symbolName)
-            .appCapsuleLabelStyle(.sidebarSubtle)
+            .appCapsuleLabelStyle(isSelected ? .sidebarSelected : .sidebarSubtle)
             .help(helpText)
             .accessibilityLabel(helpText)
     }
@@ -314,30 +402,35 @@ private struct SourceConnectionBadge: View {
 private struct SourceAvailabilityBadge: View {
     let text: String
     let emphasis: Bool
+    let isSelected: Bool
 
     var body: some View {
         Text(text)
-            .appCapsuleLabelStyle(emphasis ? .sidebarAccent : .sidebarSubtle)
+            .appCapsuleLabelStyle(isSelected ? .sidebarSelected : emphasis ? .sidebarAccent : .sidebarSubtle)
     }
 }
 
 private struct CircularScanProgressView: View {
     let progress: Double
+    let isSelected: Bool
+
+    private let size: CGFloat = 17
+    private let lineWidth: CGFloat = 1.4
 
     var body: some View {
         ZStack {
             Circle()
-                .stroke(.secondary.opacity(0.18), lineWidth: 3)
+                .stroke(isSelected ? .white.opacity(0.18) : Color.secondary.opacity(0.24), lineWidth: lineWidth)
 
             Circle()
-                .trim(from: 0, to: max(0.02, min(progress, 1)))
+                .trim(from: 0, to: max(0, min(progress, 1)))
                 .stroke(
-                    Color.appAccent,
-                    style: StrokeStyle(lineWidth: 3, lineCap: .round)
+                    isSelected ? .white.opacity(0.86) : Color.appAccent,
+                    style: StrokeStyle(lineWidth: lineWidth, lineCap: .round)
                 )
                 .rotationEffect(.degrees(-90))
         }
-        .frame(width: 18, height: 18)
+        .frame(width: size, height: size)
         .accessibilityElement(children: .ignore)
         .accessibilityLabel("Scan progress")
         .accessibilityValue(Text("\(Int((progress * 100).rounded())) percent"))
@@ -349,20 +442,22 @@ private struct ConnectedDeviceRow: View {
     let addAction: (() -> Void)?
 
     var body: some View {
-        HStack(alignment: .top, spacing: 10) {
-            ConnectedDeviceTransportIcon(
-                baseSymbolName: iconName,
-                connection: entry.device.connection,
-                tint: iconColor
-            )
+        HStack(alignment: .top) {
+            Label {
+                VStack(alignment: .leading, spacing: 4) {
+                    Text(entry.device.name)
+                        .appTextStyle(.rowTitle)
+                        .foregroundStyle(titleColor)
 
-            VStack(alignment: .leading, spacing: 4) {
-                Text(entry.device.name)
-                    .appTextStyle(.rowTitle)
-                    .foregroundStyle(titleColor)
-
-                Text(statusText)
-                    .appTextStyle(.supportingCompact)
+                    Text(statusText)
+                        .appTextStyle(.supportingCompact)
+                }
+            } icon: {
+                ConnectedDeviceTransportIcon(
+                    baseSymbolName: iconName,
+                    connection: entry.device.connection,
+                    tint: iconColor
+                )
             }
 
             Spacer(minLength: 12)

World Manager for MinecraftTests/World_Manager_for_MinecraftTests.swift

@@ -13,6 +13,9 @@ struct World_Manager_for_MinecraftTests {
     @Test func sourceOriginsExposeOutboundCapabilities() async throws {
         let localSource = MinecraftSource(folderURL: URL(fileURLWithPath: "/tmp/local"))
         #expect(localSource.capabilities == .localFolder)
+        #expect(localSource.edition == .bedrock)
+        #expect(localSource.providerID == LocalFolderSourceAccess().accessorIdentifier)
+        #expect(localSource.accessStatus.mode == .localFileSystem)
 
         let device = ConnectedDevice(
             udid: "device",
@@ -35,6 +38,556 @@ struct World_Manager_for_MinecraftTests {
         )
 
         #expect(deviceSource.capabilities == .connectedDevice)
+        #expect(deviceSource.edition == .bedrock)
+        #expect(deviceSource.providerID == AppleMobileDeviceSourceAccess().accessorIdentifier)
+        #expect(deviceSource.accessStatus.mode == .usbDevice)
+    }
+
+    @Test func contentItemsExposeNeutralProviderSurface() async throws {
+        let rootURL = URL(fileURLWithPath: "/tmp/source")
+        let item = MinecraftContentItem(
+            folderURL: rootURL.appendingPathComponent("minecraftWorlds/WorldA", isDirectory: true),
+            folderName: "WorldA",
+            contentType: .world,
+            collectionRootURL: rootURL.appendingPathComponent("minecraftWorlds", isDirectory: true),
+            displayName: "World A",
+            packUUID: "ABC-123",
+            packVersion: "1.0.0"
+        )
+
+        #expect(item.sourceEdition == .bedrock)
+        #expect(item.contentKind == .world)
+        #expect(item.platformType == .bedrock(.world))
+        #expect(item.capabilities.portablePackageExtension == "mcworld")
+        if case .bedrock(let metadata) = item.platformMetadata {
+            #expect(metadata.packUUID == "abc-123")
+            #expect(metadata.packVersion == "1.0.0")
+        } else {
+            Issue.record("Expected Bedrock metadata")
+        }
+    }
+
+    @Test func bedrockCompatibilityFieldsSynchronizePlatformMetadata() async throws {
+        let rootURL = URL(fileURLWithPath: "/tmp/source")
+        var item = MinecraftContentItem(
+            folderURL: rootURL.appendingPathComponent("behavior_packs/PackA", isDirectory: true),
+            folderName: "PackA",
+            contentType: .behaviorPack,
+            collectionRootURL: rootURL.appendingPathComponent("behavior_packs", isDirectory: true)
+        )
+
+        item.packUUID = "PACK-A"
+        item.packVersion = "2.0.0"
+
+        if case .bedrock(let metadata) = item.platformMetadata {
+            #expect(metadata.packUUID == "pack-a")
+            #expect(metadata.packVersion == "2.0.0")
+        } else {
+            Issue.record("Expected Bedrock metadata")
+        }
+    }
+
+    @Test func localFolderAccessStreamsProviderEvents() async throws {
+        let fileManager = FileManager.default
+        let rootURL = fileManager.temporaryDirectory.appendingPathComponent(UUID().uuidString, isDirectory: true)
+        let itemURL = rootURL.appendingPathComponent("minecraftWorlds/WorldA", isDirectory: true)
+        defer { try? fileManager.removeItem(at: rootURL) }
+
+        try fileManager.createDirectory(at: itemURL, withIntermediateDirectories: true)
+        try "World A".write(
+            to: itemURL.appendingPathComponent("levelname.txt"),
+            atomically: true,
+            encoding: .utf8
+        )
+
+        let source = MinecraftSource(folderURL: rootURL)
+        let access = LocalFolderSourceAccess()
+        var sawAccessStatus = false
+        var sawRunningStage = false
+        var sawFinishedStage = false
+        var discoveredItems: [MinecraftContentItem] = []
+
+        for try await event in access.scanEvents(for: source, mode: .fullScan) {
+            switch event {
+            case .accessStatusChanged(let status):
+                sawAccessStatus = true
+                #expect(status.availability == .available)
+                #expect(status.mode == .localFileSystem)
+            case .stageUpdated(let stage):
+                if stage.state == .running {
+                    sawRunningStage = true
+                }
+                if stage.state == .succeeded {
+                    sawFinishedStage = true
+                }
+            case .discovered(let item):
+                discoveredItems.append(item)
+            case .inspected, .warning:
+                break
+            }
+        }
+
+        #expect(sawAccessStatus)
+        #expect(sawRunningStage)
+        #expect(sawFinishedStage)
+        #expect(discoveredItems.map(\.displayName).contains("WorldA"))
+    }
+
+    @Test func javaLocalFolderSourceUsesJavaProviderDefaults() async throws {
+        let source = MinecraftSource(
+            folderURL: URL(fileURLWithPath: "/tmp/java"),
+            origin: .javaLocalFolder(bookmarkData: nil)
+        )
+
+        #expect(source.edition == .java)
+        #expect(source.providerID == JavaLocalFolderSourceAccess().accessorIdentifier)
+        #expect(source.accessDescriptor.accessorIdentifier == JavaLocalFolderSourceAccess().accessorIdentifier)
+        #expect(source.accessStatus.mode == .localFileSystem)
+    }
+
+    @Test func javaLocalFolderAccessDiscoversWorldsAndResourcePacks() async throws {
+        let fileManager = FileManager.default
+        let rootURL = fileManager.temporaryDirectory.appendingPathComponent(UUID().uuidString, isDirectory: true)
+        let instanceURL = rootURL.appendingPathComponent("Better MC [NEOFORGE] BMC5", isDirectory: true)
+        let worldURL = instanceURL.appendingPathComponent("saves/JavaWorld", isDirectory: true)
+        let packURL = instanceURL.appendingPathComponent("resourcepacks/JavaPack", isDirectory: true)
+        let zippedPackURL = instanceURL.appendingPathComponent("resourcepacks/JavaPack.zip")
+        let shaderPackURL = instanceURL.appendingPathComponent("shaderpacks/Shader.zip")
+        let modURL = instanceURL.appendingPathComponent("mods/ExampleMod.jar")
+        defer { try? fileManager.removeItem(at: rootURL) }
+
+        try fileManager.createDirectory(at: worldURL, withIntermediateDirectories: true)
+        try Data().write(to: worldURL.appendingPathComponent("level.dat"))
+        try "Displayed Java World".write(
+            to: worldURL.appendingPathComponent("levelname.txt"),
+            atomically: true,
+            encoding: .utf8
+        )
+        try fileManager.createDirectory(at: packURL, withIntermediateDirectories: true)
+        try "{}".write(
+            to: packURL.appendingPathComponent("pack.mcmeta"),
+            atomically: true,
+            encoding: .utf8
+        )
+        try fileManager.createDirectory(at: zippedPackURL.deletingLastPathComponent(), withIntermediateDirectories: true)
+        try Data("zip".utf8).write(to: zippedPackURL)
+        try fileManager.createDirectory(at: shaderPackURL.deletingLastPathComponent(), withIntermediateDirectories: true)
+        try Data("shader".utf8).write(to: shaderPackURL)
+        try fileManager.createDirectory(at: modURL.deletingLastPathComponent(), withIntermediateDirectories: true)
+        try Data("jar".utf8).write(to: modURL)
+
+        let access = SourceAccessCoordinator(
+            accessMethods: [
+                LocalFolderSourceAccess(),
+                JavaLocalFolderSourceAccess()
+            ]
+        )
+        let probe = await access.probeLocalFolder(rootURL)
+        #expect(probe?.providerID == JavaLocalFolderSourceAccess().accessorIdentifier)
+        #expect(probe?.sourceRootURL == instanceURL.standardizedFileURL)
+        #expect(probe?.detectedKinds.contains(.mod) == true)
+
+        var source = MinecraftSource(
+            folderURL: instanceURL,
+            origin: .localFolder(bookmarkData: nil),
+            accessDescriptor: SourceAccessDescriptor(
+                accessorIdentifier: JavaLocalFolderSourceAccess().accessorIdentifier,
+                kind: .localFolder,
+                refreshStrategy: .eagerFullScan
+            )
+        )
+        source.edition = .java
+        source.providerID = JavaLocalFolderSourceAccess().accessorIdentifier
+        var discoveredItems: [MinecraftContentItem] = []
+
+        for try await event in access.scanEvents(for: source, mode: .fullScan) {
+            if case .discovered(let item) = event {
+                discoveredItems.append(item)
+            }
+        }
+        var enrichedItems: [MinecraftContentItem] = []
+        for item in discoveredItems {
+            enrichedItems.append(await access.enrich(item, for: source))
+        }
+
+        #expect(discoveredItems.count == 5)
+        #expect(discoveredItems.allSatisfy { $0.sourceEdition == .java })
+        #expect(discoveredItems.contains { $0.platformType == .java(.world) && $0.capabilities.portablePackageExtension == "zip" })
+        #expect(discoveredItems.contains { $0.platformType == .java(.resourcePack) && $0.contentType == .resourcePack })
+        #expect(discoveredItems.contains { $0.platformType == .java(.shaderPack) && $0.contentKind == .shaderPack })
+        #expect(discoveredItems.contains { $0.platformType == .java(.mod) && $0.contentKind == .mod })
+        #expect(enrichedItems.contains { $0.displayName == "Displayed Java World" })
+
+        var indexedSource = source
+        indexedSource.rawItems = enrichedItems
+        let index = SourceContentIndexer.buildIndex(for: indexedSource)
+        #expect(index.displayItemCountsByKind[.world] == 1)
+        #expect(index.displayItemCountsByKind[.resourcePack] == 2)
+        #expect(index.displayItemCountsByKind[.shaderPack] == 1)
+        #expect(index.displayItemCountsByKind[.mod] == 1)
+
+        indexedSource.rawItems = enrichedItems
+        let snapshot = SourceScanPolicy.buildSnapshot(for: indexedSource, scanRootURL: instanceURL)
+        #expect(snapshot.collectionSnapshots.map(\.folderName).contains("saves"))
+        #expect(snapshot.collectionSnapshots.map(\.folderName).contains("resourcepacks"))
+        #expect(snapshot.collectionSnapshots.map(\.folderName).contains("shaderpacks"))
+        #expect(snapshot.collectionSnapshots.map(\.folderName).contains("mods"))
+    }
+
+    @Test func javaArchiveEnrichmentReadsModMetadataPackMetadataAndIcons() async throws {
+        let fileManager = FileManager.default
+        let workingURL = fileManager.temporaryDirectory.appendingPathComponent(UUID().uuidString, isDirectory: true)
+        let modSourceURL = workingURL.appendingPathComponent("ModSource", isDirectory: true)
+        let resourceSourceURL = workingURL.appendingPathComponent("ResourceSource", isDirectory: true)
+        let modArchiveURL = workingURL.appendingPathComponent("ExampleMod.jar")
+        let resourceArchiveURL = workingURL.appendingPathComponent("ExamplePack.zip")
+        defer { try? fileManager.removeItem(at: workingURL) }
+
+        try fileManager.createDirectory(at: modSourceURL.appendingPathComponent("META-INF", isDirectory: true), withIntermediateDirectories: true)
+        try """
+        modLoader = "javafml"
+        loaderVersion = "[1,)"
+
+        [[mods]]
+        modId = "examplemod"
+        version = "1.2.3"
+        displayName = "Example Java Mod"
+        logoFile = "icon.png"
+        authors = "Alex, Sam"
+        description = "A test mod."
+
+        [[dependencies.examplemod]]
+        modId = "minecraft"
+        versionRange = "[1.21,)"
+        """.write(
+            to: modSourceURL.appendingPathComponent("META-INF/neoforge.mods.toml"),
+            atomically: true,
+            encoding: .utf8
+        )
+        try """
+        {
+          "pack": {
+            "description": "Example Mod Resources",
+            "pack_format": 31
+          }
+        }
+        """.write(to: modSourceURL.appendingPathComponent("pack.mcmeta"), atomically: true, encoding: .utf8)
+        try Data([0x89, 0x50, 0x4E, 0x47]).write(to: modSourceURL.appendingPathComponent("icon.png"))
+        try makeArchive(from: modSourceURL, to: modArchiveURL)
+
+        try fileManager.createDirectory(at: resourceSourceURL, withIntermediateDirectories: true)
+        try """
+        {
+          "pack": {
+            "description": "Example Resource Pack",
+            "pack_format": 34,
+            "supported_formats": {
+              "min_inclusive": 34,
+              "max_inclusive": 42
+            }
+          }
+        }
+        """.write(to: resourceSourceURL.appendingPathComponent("pack.mcmeta"), atomically: true, encoding: .utf8)
+        try Data([0x89, 0x50, 0x4E, 0x47]).write(to: resourceSourceURL.appendingPathComponent("pack.png"))
+        try makeArchive(from: resourceSourceURL, to: resourceArchiveURL)
+
+        let modItem = MinecraftContentItem(
+            folderURL: modArchiveURL,
+            folderName: modArchiveURL.lastPathComponent,
+            contentType: .resourcePack,
+            sourceEdition: .java,
+            contentKind: .mod,
+            platformType: .java(.mod),
+            collectionRootURL: workingURL,
+            capabilities: .java(contentType: .mod),
+            platformMetadata: .java(JavaContentMetadata())
+        )
+        let resourceItem = MinecraftContentItem(
+            folderURL: resourceArchiveURL,
+            folderName: resourceArchiveURL.lastPathComponent,
+            contentType: .resourcePack,
+            sourceEdition: .java,
+            contentKind: .resourcePack,
+            platformType: .java(.resourcePack),
+            collectionRootURL: workingURL,
+            capabilities: .java(contentType: .resourcePack),
+            platformMetadata: .java(JavaContentMetadata())
+        )
+
+        let enrichedMod = await JavaContentScanner.enrich(item: modItem)
+        let enrichedResource = await JavaContentScanner.enrich(item: resourceItem)
+
+        #expect(enrichedMod.displayName == "Example Java Mod")
+        #expect(enrichedMod.iconURL != nil)
+        #expect(enrichedMod.hasKnownIcon)
+        if case .java(let metadata) = enrichedMod.platformMetadata {
+            #expect(metadata.pack?.description == "Example Mod Resources")
+            #expect(metadata.pack?.packFormat == 31)
+            #expect(metadata.mod?.modID == "examplemod")
+            #expect(metadata.mod?.version == "1.2.3")
+            #expect(metadata.mod?.description == "A test mod.")
+            #expect(metadata.mod?.authors == ["Alex", "Sam"])
+            #expect(metadata.mod?.minecraftVersionRequirement == "[1.21,)")
+        } else {
+            Issue.record("Expected Java metadata")
+        }
+
+        #expect(enrichedResource.iconURL != nil)
+        if case .java(let metadata) = enrichedResource.platformMetadata {
+            #expect(metadata.pack?.description == "Example Resource Pack")
+            #expect(metadata.pack?.packFormat == 34)
+            #expect(metadata.pack?.supportedFormats == "34-42")
+        } else {
+            Issue.record("Expected Java metadata")
+        }
+    }
+
+    @Test func javaProviderDiscoversSourceCandidatesFromBoundedRoots() async throws {
+        let fileManager = FileManager.default
+        let workingURL = fileManager.temporaryDirectory.appendingPathComponent(UUID().uuidString, isDirectory: true)
+        let instanceRootURL = workingURL
+            .appendingPathComponent("PrismLauncher/instances/Example Instance/.minecraft", isDirectory: true)
+        let modURL = instanceRootURL.appendingPathComponent("mods/ExampleMod.jar")
+        defer { try? fileManager.removeItem(at: workingURL) }
+
+        try fileManager.createDirectory(at: modURL.deletingLastPathComponent(), withIntermediateDirectories: true)
+        try Data("jar".utf8).write(to: modURL)
+        try fileManager.createDirectory(
+            at: instanceRootURL.appendingPathComponent("resourcepacks", isDirectory: true),
+            withIntermediateDirectories: true
+        )
+
+        let access = JavaLocalFolderSourceAccess(candidateDiscoveryRoots: [workingURL])
+        var candidates: [SourceCandidate] = []
+
+        for try await event in access.discoverSourceCandidates() {
+            if case .candidate(let candidate) = event {
+                candidates.append(candidate)
+            }
+        }
+
+        #expect(candidates.contains { candidate in
+            candidate.providerID == JavaLocalFolderSourceAccess().accessorIdentifier
+                && candidate.edition == .java
+                && candidate.sourceRootURL == instanceRootURL.standardizedFileURL
+                && candidate.detectedKinds.contains(.mod)
+                && candidate.detectedKinds.contains(.resourcePack)
+        })
+    }
+
+    @Test func javaProviderCollapsesNestedSourceCandidatesToSearchRoot() async throws {
+        let fileManager = FileManager.default
+        let workingURL = fileManager.temporaryDirectory.appendingPathComponent(UUID().uuidString, isDirectory: true)
+        let firstInstanceURL = workingURL.appendingPathComponent("a/b/c", isDirectory: true)
+        let secondInstanceURL = workingURL.appendingPathComponent("a/e/f", isDirectory: true)
+        defer { try? fileManager.removeItem(at: workingURL) }
+
+        for instanceURL in [firstInstanceURL, secondInstanceURL] {
+            try fileManager.createDirectory(
+                at: instanceURL.appendingPathComponent("mods", isDirectory: true),
+                withIntermediateDirectories: true
+            )
+            try Data("jar".utf8).write(to: instanceURL.appendingPathComponent("mods/ExampleMod.jar"))
+        }
+
+        let candidates = JavaContentScanner.discoverSourceCandidates(
+            providerID: JavaLocalFolderSourceAccess().accessorIdentifier,
+            searchRoots: [workingURL]
+        )
+
+        #expect(candidates.count == 1)
+        #expect(candidates.first?.sourceRootURL == workingURL.standardizedFileURL)
+        #expect(candidates.first?.displayName == workingURL.lastPathComponent)
+        #expect(candidates.first?.detectedKinds.contains(.mod) == true)
+    }
+
+    @Test func javaProviderDeduplicatesCaseVariantSourceRoots() async throws {
+        let fileManager = FileManager.default
+        let workingURL = fileManager.temporaryDirectory.appendingPathComponent(UUID().uuidString, isDirectory: true)
+        let upperRootURL = workingURL.appendingPathComponent("CurseForge/Minecraft", isDirectory: true)
+        let lowerRootURL = workingURL.appendingPathComponent("curseforge/minecraft", isDirectory: true)
+        let firstInstanceURL = upperRootURL.appendingPathComponent("Instances/ExampleOne", isDirectory: true)
+        let secondInstanceURL = upperRootURL.appendingPathComponent("Instances/ExampleTwo", isDirectory: true)
+        defer { try? fileManager.removeItem(at: workingURL) }
+
+        for instanceURL in [firstInstanceURL, secondInstanceURL] {
+            try fileManager.createDirectory(
+                at: instanceURL.appendingPathComponent("mods", isDirectory: true),
+                withIntermediateDirectories: true
+            )
+            try Data("jar".utf8).write(to: instanceURL.appendingPathComponent("mods/ExampleMod.jar"))
+        }
+
+        guard fileManager.fileExists(atPath: lowerRootURL.path) else {
+            return
+        }
+
+        let candidates = JavaContentScanner.discoverSourceCandidates(
+            providerID: JavaLocalFolderSourceAccess().accessorIdentifier,
+            searchRoots: [upperRootURL, lowerRootURL]
+        )
+
+        #expect(candidates.count == 1)
+        #expect(sourceIdentityKey(for: candidates[0].sourceRootURL) == sourceIdentityKey(for: upperRootURL))
+    }
+
+    @Test func javaAggregateRootDiscoversNestedInstanceItems() async throws {
+        let fileManager = FileManager.default
+        let workingURL = fileManager.temporaryDirectory.appendingPathComponent(UUID().uuidString, isDirectory: true)
+        let firstInstanceURL = workingURL.appendingPathComponent("a/b/c", isDirectory: true)
+        let secondInstanceURL = workingURL.appendingPathComponent("a/e/f", isDirectory: true)
+        defer { try? fileManager.removeItem(at: workingURL) }
+
+        try fileManager.createDirectory(
+            at: firstInstanceURL.appendingPathComponent("mods", isDirectory: true),
+            withIntermediateDirectories: true
+        )
+        try Data("jar".utf8).write(to: firstInstanceURL.appendingPathComponent("mods/ExampleMod.jar"))
+
+        try fileManager.createDirectory(
+            at: secondInstanceURL.appendingPathComponent("resourcepacks", isDirectory: true),
+            withIntermediateDirectories: true
+        )
+        try Data("zip".utf8).write(to: secondInstanceURL.appendingPathComponent("resourcepacks/ExamplePack.zip"))
+
+        let items = try JavaContentScanner.discoverItems(in: workingURL)
+        let snapshots = JavaContentScanner.collectionSnapshots(in: workingURL)
+
+        #expect(items.contains { $0.contentKind == .mod && $0.folderName == "ExampleMod.jar" })
+        #expect(items.contains { $0.contentKind == .resourcePack && $0.folderName == "ExamplePack.zip" })
+        #expect(snapshots.map(\.folderName).contains("a/b/c/mods"))
+        #expect(snapshots.map(\.folderName).contains("a/e/f/resourcepacks"))
+    }
+
+    @Test func sourceRestorationComparesDuplicateCollectionNamesWithoutCrashing() async throws {
+        let fileManager = FileManager.default
+        let workingURL = fileManager.temporaryDirectory.appendingPathComponent(UUID().uuidString, isDirectory: true)
+        defer { try? fileManager.removeItem(at: workingURL) }
+        try fileManager.createDirectory(at: workingURL, withIntermediateDirectories: true)
+
+        let collectionSnapshots = [
+            CollectionSnapshot(
+                folderName: "mods",
+                modifiedDate: Date(timeIntervalSince1970: 100),
+                childDirectoryCount: 1,
+                fingerprint: "a/b/c/mods::1::100"
+            ),
+            CollectionSnapshot(
+                folderName: "mods",
+                modifiedDate: Date(timeIntervalSince1970: 200),
+                childDirectoryCount: 2,
+                fingerprint: "x/y/z/mods::2::200"
+            )
+        ]
+        var source = MinecraftSource(
+            folderURL: workingURL,
+            origin: .javaLocalFolder(bookmarkData: nil),
+            accessDescriptor: SourceAccessDescriptor(
+                accessorIdentifier: JavaLocalFolderSourceAccess().accessorIdentifier,
+                kind: .localFolder,
+                refreshStrategy: .eagerFullScan
+            ),
+            availability: .available
+        )
+        source.edition = .java
+        source.snapshot = SourceSnapshot(
+            sourceID: workingURL,
+            rootModifiedDate: nil,
+            collectionSnapshots: collectionSnapshots,
+            itemSnapshots: []
+        )
+
+        #expect(SourceRestoration.needsReconcile(source) { _, _ in collectionSnapshots } == false)
+        #expect(
+            SourceRestoration.needsReconcile(source) { _, _ in
+                [
+                    collectionSnapshots[0],
+                    CollectionSnapshot(
+                        folderName: "mods",
+                        modifiedDate: Date(timeIntervalSince1970: 300),
+                        childDirectoryCount: 3,
+                        fingerprint: "x/y/z/mods::3::300"
+                    )
+                ]
+            } == true
+        )
+    }
+
+    @Test func sourceLibraryAddSourceCandidatePreservesJavaAggregateProvider() async throws {
+        let fileManager = FileManager.default
+        let workingURL = fileManager.temporaryDirectory.appendingPathComponent(UUID().uuidString, isDirectory: true)
+        let instanceURL = workingURL.appendingPathComponent("a/b/c", isDirectory: true)
+        let modURL = instanceURL.appendingPathComponent("mods/ExampleMod.jar")
+        defer { try? fileManager.removeItem(at: workingURL) }
+
+        try fileManager.createDirectory(at: modURL.deletingLastPathComponent(), withIntermediateDirectories: true)
+        try Data("jar".utf8).write(to: modURL)
+
+        let candidate = SourceCandidate(
+            providerID: JavaLocalFolderSourceAccess().accessorIdentifier,
+            edition: .java,
+            sourceRootURL: workingURL,
+            displayName: workingURL.lastPathComponent,
+            confidence: .strong,
+            reason: "Found multiple Java sources",
+            detectedKinds: [.mod]
+        )
+        let access = SourceAccessCoordinator(
+            accessMethods: [
+                LocalFolderSourceAccess(),
+                JavaLocalFolderSourceAccess()
+            ]
+        )
+        let library = SourceLibrary(sourceAccessMethod: access)
+
+        let sourceID = await library.addSource(candidate: candidate)
+        guard let source = library.source(withID: sourceID) else {
+            Issue.record("Expected added source")
+            return
+        }
+
+        #expect(source.folderURL == workingURL.standardizedFileURL)
+        #expect(source.edition == .java)
+        #expect(source.providerID == JavaLocalFolderSourceAccess().accessorIdentifier)
+        #expect(source.accessDescriptor.accessorIdentifier == JavaLocalFolderSourceAccess().accessorIdentifier)
+
+        let items = try JavaContentScanner.discoverItems(in: source.folderURL)
+        #expect(items.contains { $0.contentKind == .mod && $0.folderName == "ExampleMod.jar" })
+    }
+
+    @Test func sourceLibraryAddSourceResolvesJavaWrapperFolder() async throws {
+        let fileManager = FileManager.default
+        let rootURL = fileManager.temporaryDirectory.appendingPathComponent(UUID().uuidString, isDirectory: true)
+        let instanceURL = rootURL.appendingPathComponent("Better MC [NEOFORGE] BMC5", isDirectory: true)
+        let modURL = instanceURL.appendingPathComponent("mods/ExampleMod.jar")
+        defer { try? fileManager.removeItem(at: rootURL) }
+
+        try fileManager.createDirectory(at: modURL.deletingLastPathComponent(), withIntermediateDirectories: true)
+        try Data("jar".utf8).write(to: modURL)
+        try fileManager.createDirectory(
+            at: instanceURL.appendingPathComponent("resourcepacks", isDirectory: true),
+            withIntermediateDirectories: true
+        )
+
+        let access = SourceAccessCoordinator(
+            accessMethods: [
+                LocalFolderSourceAccess(),
+                JavaLocalFolderSourceAccess()
+            ]
+        )
+        let library = SourceLibrary(sourceAccessMethod: access)
+
+        let sourceID = await library.addSource(at: rootURL)
+        guard let source = library.source(withID: sourceID) else {
+            Issue.record("Expected added source")
+            return
+        }
+
+        #expect(source.folderURL == instanceURL.standardizedFileURL)
+        #expect(source.origin.kind == .localFolder)
+        #expect(source.edition == .java)
+        #expect(source.providerID == JavaLocalFolderSourceAccess().accessorIdentifier)
+        #expect(source.accessDescriptor.accessorIdentifier == JavaLocalFolderSourceAccess().accessorIdentifier)
     }
 
     @Test func libraryExternalRepresentationUsesPortablePackageByDefault() async throws {
@@ -771,119 +1324,6 @@ struct World_Manager_for_MinecraftTests {
         }
     }
 
-    @Test func packageInstallerPreparesCompleteWorldContents() async throws {
-        let fileManager = FileManager.default
-        let workingURL = fileManager.temporaryDirectory.appendingPathComponent(UUID().uuidString, isDirectory: true)
-        let worldURL = workingURL.appendingPathComponent("World", isDirectory: true)
-        let archiveURL = workingURL.appendingPathComponent("World.mcworld", isDirectory: false)
-        defer { try? fileManager.removeItem(at: workingURL) }
-
-        try fileManager.createDirectory(
-            at: worldURL.appendingPathComponent("db", isDirectory: true),
-            withIntermediateDirectories: true
-        )
-        try Data([1, 2, 3]).write(to: worldURL.appendingPathComponent("level.dat"))
-        try Data([4, 5, 6]).write(to: worldURL.appendingPathComponent("db/chunk.bin"))
-        try makeArchive(from: worldURL, to: archiveURL)
-
-        let plan = try MinecraftPackageInstaller.preparePackage(at: archiveURL)
-        defer { plan.cleanup() }
-
-        #expect(plan.payloads.count == 1)
-        #expect(plan.payloads[0].contentType == .world)
-        #expect(
-            fileManager.fileExists(
-                atPath: plan.payloads[0].preparedDirectoryURL.appendingPathComponent("db/chunk.bin").path
-            )
-        )
-    }
-
-    @Test func packageInstallerExpandsNestedAddonPackages() async throws {
-        let fileManager = FileManager.default
-        let workingURL = fileManager.temporaryDirectory.appendingPathComponent(UUID().uuidString, isDirectory: true)
-        let behaviorURL = workingURL.appendingPathComponent("Behavior", isDirectory: true)
-        let resourceURL = workingURL.appendingPathComponent("Resource", isDirectory: true)
-        let addonRootURL = workingURL.appendingPathComponent("Addon", isDirectory: true)
-        let behaviorArchiveURL = addonRootURL.appendingPathComponent("Behavior.mcpack")
-        let resourceArchiveURL = addonRootURL.appendingPathComponent("Resource.mcpack")
-        let addonURL = workingURL.appendingPathComponent("Combined.mcaddon")
-        defer { try? fileManager.removeItem(at: workingURL) }
-
-        try fileManager.createDirectory(at: behaviorURL, withIntermediateDirectories: true)
-        try fileManager.createDirectory(at: resourceURL, withIntermediateDirectories: true)
-        try fileManager.createDirectory(at: addonRootURL, withIntermediateDirectories: true)
-        try testPackManifest(name: "Behavior", uuid: "11111111-1111-1111-1111-111111111111", moduleType: "data")
-            .write(to: behaviorURL.appendingPathComponent("manifest.json"), atomically: true, encoding: .utf8)
-        try testPackManifest(name: "Resource", uuid: "22222222-2222-2222-2222-222222222222", moduleType: "resources")
-            .write(to: resourceURL.appendingPathComponent("manifest.json"), atomically: true, encoding: .utf8)
-        try makeArchive(from: behaviorURL, to: behaviorArchiveURL)
-        try makeArchive(from: resourceURL, to: resourceArchiveURL)
-        try makeArchive(from: addonRootURL, to: addonURL)
-
-        let plan = try MinecraftPackageInstaller.preparePackage(at: addonURL)
-        defer { plan.cleanup() }
-
-        #expect(Set(plan.payloads.map(\.contentType)) == [.behaviorPack, .resourcePack])
-    }
-
-    @Test func localFolderInstallerUsesUniqueAdditiveDestinations() async throws {
-        let fileManager = FileManager.default
-        let workingURL = fileManager.temporaryDirectory.appendingPathComponent(UUID().uuidString, isDirectory: true)
-        let sourceWorldURL = workingURL.appendingPathComponent("PreparedWorld", isDirectory: true)
-        let destinationRootURL = workingURL.appendingPathComponent("Destination", isDirectory: true)
-        defer { try? fileManager.removeItem(at: workingURL) }
-
-        try fileManager.createDirectory(at: sourceWorldURL, withIntermediateDirectories: true)
-        try fileManager.createDirectory(at: destinationRootURL, withIntermediateDirectories: true)
-        try Data([1]).write(to: sourceWorldURL.appendingPathComponent("level.dat"))
-
-        let plan = try MinecraftPackageInstaller.prepareDirectory(at: sourceWorldURL, contentType: .world)
-        defer { plan.cleanup() }
-        let source = MinecraftSource(folderURL: destinationRootURL, availability: .available)
-        let access = LocalFolderSourceAccess()
-
-        let first = try await access.install(plan.payloads[0], in: source)
-        let second = try await access.install(plan.payloads[0], in: source)
-
-        #expect(first.destinationName != second.destinationName)
-        #expect(
-            fileManager.fileExists(
-                atPath: destinationRootURL
-                    .appendingPathComponent("minecraftWorlds/\(first.destinationName)/level.dat")
-                    .path
-            )
-        )
-        #expect(
-            fileManager.fileExists(
-                atPath: destinationRootURL
-                    .appendingPathComponent("minecraftWorlds/\(second.destinationName)/level.dat")
-                    .path
-            )
-        )
-    }
-
-    @Test func zipReaderRejectsParentTraversalEntry() async throws {
-        let fileManager = FileManager.default
-        let workingURL = fileManager.temporaryDirectory.appendingPathComponent(UUID().uuidString, isDirectory: true)
-        let archiveURL = workingURL.appendingPathComponent("Unsafe.mcworld")
-        defer { try? fileManager.removeItem(at: workingURL) }
-
-        try fileManager.createDirectory(at: workingURL, withIntermediateDirectories: true)
-        try makeStoredArchive(entries: [("../escape.txt", Data("escape".utf8))], to: archiveURL)
-
-        do {
-            _ = try ZipArchiveReader(url: archiveURL)
-            Issue.record("Expected the unsafe archive path to be rejected.")
-        } catch let error as ZipArchiveReaderError {
-            switch error {
-            case .unsafeEntryPath(let path):
-                #expect(path == "../escape.txt")
-            default:
-                Issue.record("Expected unsafeEntryPath but received \(error).")
-            }
-        }
-    }
-
     @Test func sourcePersistenceStoreRoundTripsCachedSource() async throws {
         let fileManager = FileManager.default
         let workingURL = fileManager.temporaryDirectory.appendingPathComponent(UUID().uuidString, isDirectory: true)
@@ -1064,6 +1504,106 @@ struct World_Manager_for_MinecraftTests {
         #expect(restored[0].lastScanDate == legacyRecord.lastScanDate)
     }
 
+    @Test func sourceRestorationPreservesJavaProviderResolvedLocalFolder() async throws {
+        let sourceURL = URL(fileURLWithPath: "/tmp/JavaInstance", isDirectory: true)
+        let accessDescriptor = SourceAccessDescriptor(
+            accessorIdentifier: JavaLocalFolderSourceAccess().accessorIdentifier,
+            kind: .localFolder,
+            refreshStrategy: .eagerFullScan
+        )
+        let record = PersistedSourceRecord(
+            sourceID: sourceURL,
+            folderURL: sourceURL,
+            origin: .localFolder(bookmarkData: nil),
+            accessDescriptor: accessDescriptor,
+            availability: .available,
+            bookmarkData: nil,
+            displayName: "Java Instance",
+            rawItems: [],
+            snapshot: nil,
+            lastScanDate: nil,
+            needsRepair: false
+        )
+
+        let source = SourceRestoration.restoredSource(from: record) { _, _ in "" }
+
+        #expect(source.origin.kind == .localFolder)
+        #expect(source.edition == .java)
+        #expect(source.providerID == JavaLocalFolderSourceAccess().accessorIdentifier)
+        #expect(source.accessDescriptor == accessDescriptor)
+    }
+
+    @Test func javaRestoredSnapshotDoesNotRequestRefreshWhenUnchanged() async throws {
+        let fileManager = FileManager.default
+        let sourceURL = fileManager.temporaryDirectory.appendingPathComponent(UUID().uuidString, isDirectory: true)
+        let modURL = sourceURL.appendingPathComponent("mods/ExampleMod.jar")
+        defer { try? fileManager.removeItem(at: sourceURL) }
+
+        try fileManager.createDirectory(at: modURL.deletingLastPathComponent(), withIntermediateDirectories: true)
+        try Data("jar".utf8).write(to: modURL)
+
+        let item = MinecraftContentItem(
+            folderURL: modURL,
+            folderName: modURL.lastPathComponent,
+            contentType: .resourcePack,
+            sourceEdition: .java,
+            contentKind: .mod,
+            platformType: .java(.mod),
+            collectionRootURL: modURL.deletingLastPathComponent(),
+            displayName: "ExampleMod",
+            capabilities: .java(contentType: .mod),
+            platformMetadata: .java(JavaContentMetadata())
+        )
+        var source = MinecraftSource(
+            folderURL: sourceURL,
+            origin: .localFolder(bookmarkData: nil),
+            accessDescriptor: SourceAccessDescriptor(
+                accessorIdentifier: JavaLocalFolderSourceAccess().accessorIdentifier,
+                kind: .localFolder,
+                refreshStrategy: .eagerFullScan
+            ),
+            availability: .available
+        )
+        source.providerID = JavaLocalFolderSourceAccess().accessorIdentifier
+        source.edition = .java
+        SourceRestoration.applyRestoredItemState(
+            [item],
+            lastScanDate: Date(timeIntervalSince1970: 1_000),
+            snapshot: nil,
+            to: &source
+        )
+        source.snapshot = SourceScanPolicy.buildSnapshot(for: source, scanRootURL: sourceURL)
+
+        let record = PersistedSourceRecord(
+            sourceID: source.id,
+            folderURL: source.folderURL,
+            origin: source.origin,
+            accessDescriptor: source.accessDescriptor,
+            availability: source.availability,
+            bookmarkData: nil,
+            displayName: source.displayName,
+            rawItems: source.rawItems,
+            snapshot: source.snapshot,
+            lastScanDate: source.lastScanDate,
+            needsRepair: false
+        )
+
+        let refreshReason = SourceRestoration.startupRefreshReason(
+            for: source,
+            persistedRecord: record
+        ) { url, edition in
+            switch edition {
+            case .bedrock:
+                return WorldScanner.collectionSnapshots(in: url)
+            case .java:
+                return JavaContentScanner.collectionSnapshots(in: url)
+            }
+        }
+
+        #expect(refreshReason == nil)
+        #expect(source.snapshot?.collectionSnapshots.first?.childDirectoryCount == 1)
+    }
+
     @Test func connectedDeviceSourceFactoryCreatesStableSyntheticIdentifier() async throws {
         let device = ConnectedDevice(
             udid: "00008110-001234560E90001E",
@@ -1235,24 +1775,6 @@ struct World_Manager_for_MinecraftTests {
         #expect(ScanNotificationService.completionMessage(itemCount: 42) == "Found 42 items.")
     }
 
-    @Test func liveScanStatusCountsItemsRemainingDuringSizeCalculation() async throws {
-        var source = MinecraftSource(
-            folderURL: URL(fileURLWithPath: "/tmp/test-source", isDirectory: true)
-        )
-        source.displayName = "Test Source"
-        source.isScanning = true
-        source.indexedItemCount = 22
-        source.previewLoadedCount = 22
-        source.sizeLoadedCount = 12
-        source.scanProgress = 0.88
-        source.scanStatus = "Calculating sizes"
-
-        #expect(
-            SourcePresentation.liveScanStatusTitle(for: source)
-                == "Calculating sizes for 10 of 22 items..."
-        )
-    }
-
     @Test func scanNotificationServiceOnlyNotifiesForLongBackgroundScans() async throws {
         let service = ScanNotificationService()
 
@@ -1382,82 +1904,6 @@ private func makeArchive(from sourceDirectoryURL: URL, to archiveURL: URL) throw
     }
 }
 
-private func testPackManifest(name: String, uuid: String, moduleType: String) -> String {
-    """
-    {
-      "format_version": 2,
-      "header": {
-        "name": "\(name)",
-        "description": "\(name)",
-        "uuid": "\(uuid)",
-        "version": [1, 0, 0]
-      },
-      "modules": [
-        {
-          "type": "\(moduleType)",
-          "uuid": "\(UUID().uuidString)",
-          "version": [1, 0, 0]
-        }
-      ]
-    }
-    """
-}
-
-private func makeStoredArchive(entries: [(String, Data)], to archiveURL: URL) throws {
-    var archive = Data()
-    var centralDirectory = Data()
-
-    for (path, contents) in entries {
-        let pathData = Data(path.utf8)
-        let localHeaderOffset = UInt32(archive.count)
-
-        appendLE(UInt32(0x04034b50), to: &archive)
-        appendLE(UInt16(20), to: &archive)
-        appendLE(UInt16(0), to: &archive)
-        appendLE(UInt16(0), to: &archive)
-        appendLE(UInt16(0), to: &archive)
-        appendLE(UInt16(0), to: &archive)
-        appendLE(UInt32(0), to: &archive)
-        appendLE(UInt32(contents.count), to: &archive)
-        appendLE(UInt32(contents.count), to: &archive)
-        appendLE(UInt16(pathData.count), to: &archive)
-        appendLE(UInt16(0), to: &archive)
-        archive.append(pathData)
-        archive.append(contents)
-
-        appendLE(UInt32(0x02014b50), to: &centralDirectory)
-        appendLE(UInt16(20), to: &centralDirectory)
-        appendLE(UInt16(20), to: &centralDirectory)
-        appendLE(UInt16(0), to: &centralDirectory)
-        appendLE(UInt16(0), to: &centralDirectory)
-        appendLE(UInt16(0), to: &centralDirectory)
-        appendLE(UInt16(0), to: &centralDirectory)
-        appendLE(UInt32(0), to: &centralDirectory)
-        appendLE(UInt32(contents.count), to: &centralDirectory)
-        appendLE(UInt32(contents.count), to: &centralDirectory)
-        appendLE(UInt16(pathData.count), to: &centralDirectory)
-        appendLE(UInt16(0), to: &centralDirectory)
-        appendLE(UInt16(0), to: &centralDirectory)
-        appendLE(UInt16(0), to: &centralDirectory)
-        appendLE(UInt16(0), to: &centralDirectory)
-        appendLE(UInt32(0), to: &centralDirectory)
-        appendLE(localHeaderOffset, to: &centralDirectory)
-        centralDirectory.append(pathData)
-    }
-
-    let centralDirectoryOffset = UInt32(archive.count)
-    archive.append(centralDirectory)
-    appendLE(UInt32(0x06054b50), to: &archive)
-    appendLE(UInt16(0), to: &archive)
-    appendLE(UInt16(0), to: &archive)
-    appendLE(UInt16(entries.count), to: &archive)
-    appendLE(UInt16(entries.count), to: &archive)
-    appendLE(UInt32(centralDirectory.count), to: &archive)
-    appendLE(centralDirectoryOffset, to: &archive)
-    appendLE(UInt16(0), to: &archive)
-    try archive.write(to: archiveURL, options: .atomic)
-}
-
 private enum ArchiveTestError: LocalizedError {
     case failedToCreateArchive(String)
 

docs/ios-device-access.md

@@ -2,7 +2,7 @@
 
 ## Summary
 
-World Manager can browse and install Minecraft Bedrock content on a trusted iPhone or iPad from macOS using Apple's private `MobileDevice.framework` and the House Arrest service.
+World Manager can browse Minecraft Bedrock content from a trusted iPhone or iPad on macOS using Apple's private `MobileDevice.framework` and the House Arrest service.
 
 Connected-device sources are modeled as normal `MinecraftSource` values, but they are not scanned through a live filesystem mirror. The current implementation asks the device for library item summaries, metadata, icons, sizes, and directory listings through `AppleMobileDeviceSourceAccess`. Only explicit materialization operations, such as reveal/export/share, mirror an item subtree into a temporary local directory.
 
@@ -87,18 +87,6 @@ During materialization:
 - `ContentPackageExporter` mirrors the selected item into archive staging when exporting connected-device content.
 - Temporary materialized folders are treated as disposable.
 
-During installation:
-
-- Package contents are fully extracted and validated on the Mac.
-- The bridge creates an operation directory under `Documents/games/com.mojang/.world-manager-staging`.
-- Files are uploaded through `AFCFileRefWrite`.
-- The destination collection is created if needed.
-- `AFCRenamePath` moves the completed staging directory into the appropriate collection.
-- A unique destination directory is selected, so an existing world or folder is not overwritten.
-- Failed staging trees are removed recursively through AFC.
-
-The write symbols are loaded opportunistically. Their absence prevents installation but does not disable read-only device access.
-
 ## Persistence
 
 Connected-device sources are persisted in the SQLite source cache with:
@@ -144,6 +132,3 @@ These commands require a trusted connected device and generally need to run outs
 - Behavior can change across macOS, iOS, iPadOS, and Minecraft releases.
 - Device access requires trust, unlock state, and a vendable app container.
 - Connected-device export/reveal operations may be slower than local folder operations because they materialize remote content on demand.
-- Device writes are serialized with scans and exports for the same device.
-- Multi-item imports can be partially completed if the device disconnects between items. The app reports the completed count and rescans the destination when it reconnects.
-- Pack replacement and removal are intentionally not implemented in the additive first version.

docs/provider-architecture-design.md

@@ -0,0 +1,248 @@
+# Provider Architecture Design
+
+World Manager should treat Minecraft libraries as sources of content units that
+can be discovered, inspected, cached, displayed, materialized, exported, and
+eventually copied between sources. Bedrock local folders, Bedrock iOS devices,
+Java local folders, and possible future platforms should be cohesive provider
+modules behind one engine contract.
+
+## Goals
+
+- Keep provider-specific knowledge inside provider modules.
+- Give the UI a uniform model for equivalent concepts: name, edition, kind,
+  source, icon, dates, size, availability, progress, and actions.
+- Preserve variable metadata for platform details that do not translate across
+  editions.
+- Allow scan workflows to stream events instead of forcing every provider into
+  the same fixed stages.
+- Keep connected-device and remote-like sources free to throttle work more
+  aggressively than local filesystem sources.
+
+## Shape
+
+```text
+Platforms/Bedrock
+  BedrockLocalFolderProvider
+  BedrockIOSDeviceProvider
+  BedrockContentScanner
+  BedrockMetadataReader
+  BedrockExporter
+  BedrockMaterializer
+
+Platforms/Java
+  JavaLocalFolderProvider
+  JavaContentScanner
+  JavaMetadataReader
+  JavaExporter
+  JavaMaterializer
+
+Engine
+  ProviderRegistry
+  SourceEngine
+  Scan orchestration
+  Cache/snapshot persistence
+  Generic indexing/search/projection
+  Generic action dispatch
+
+UI
+  Generic source and item surfaces
+  Provider/edition-specific detail sections
+```
+
+## Core Concepts
+
+### Local Folder Intake
+
+The folder picker should not decide the platform. A picked folder is a local
+access root; providers decide whether it contains Bedrock, Java, or another
+platform.
+
+```text
+User picks folder
+  -> provider registry asks local providers to probe it
+  -> strongest probe chooses provider, edition, and source root
+  -> source is stored as a local folder with providerID/accessDescriptor
+  -> scans route through the selected provider
+```
+
+This keeps filesystem access separate from Minecraft format knowledge. For
+example, selecting a wrapper folder that contains one Java modpack instance can
+resolve to the nested instance folder while still using local folder access.
+
+```swift
+struct SourceProbeResult {
+    let providerID: PlatformProviderID
+    let edition: MinecraftEdition
+    let confidence: SourceProbeConfidence
+    let sourceRootURL: URL
+    let displayName: String
+    let detectedKinds: Set<MinecraftContentKind>
+    let warnings: [String]
+}
+```
+
+### Provider
+
+A provider is the unit that knows a platform and access method. A provider can
+represent an edition/access pairing such as Bedrock local folder, Bedrock iOS
+device, or Java local folder.
+
+```swift
+protocol MinecraftPlatformProvider: Sendable {
+    var id: PlatformProviderID { get }
+    var displayName: String { get }
+
+    func accessDescriptor(for source: MinecraftSource) -> SourceAccessDescriptor
+    func accessStatus(for source: MinecraftSource) async -> SourceAccessStatus
+    func capabilities(for source: MinecraftSource) async -> SourceCapabilities
+
+    func scan(_ request: ProviderScanRequest) -> AsyncThrowingStream<ProviderEvent, Error>
+    func materialize(_ unit: MinecraftContentItem, in source: MinecraftSource) async throws -> URL
+    func export(_ unit: MinecraftContentItem, in source: MinecraftSource, request: ExportRequest) async throws -> URL
+}
+```
+
+The current `SourceAccessMethod` is already close to this role. The refactor
+should evolve it rather than replace the whole source system at once.
+
+### Content Unit
+
+The engine should pass around an edition-aware content unit with a strong common
+surface and boxed platform metadata.
+
+```swift
+struct MinecraftContentItem {
+    let id: URL
+    let folderURL: URL
+    let folderName: String
+    let sourceEdition: MinecraftEdition
+    let contentKind: MinecraftContentKind
+    let platformType: MinecraftPlatformContentType
+    let collectionRootURL: URL
+
+    var displayName: String
+    var iconURL: URL?
+    var modifiedDate: Date?
+    var sizeBytes: Int64?
+    var capabilities: ContentItemCapabilities
+    var platformMetadata: PlatformContentMetadata
+}
+```
+
+The model can retain compatibility shims during migration, but new code should
+prefer edition, kind, capabilities, and boxed metadata over Bedrock-only fields.
+
+### Metadata
+
+Generic UI should avoid flattening provider metadata. Platform details should be
+boxed and rendered by edition/provider-aware detail sections.
+
+```swift
+enum PlatformContentMetadata: Hashable, Sendable, Codable {
+    case bedrock(BedrockContentMetadata)
+    case java(JavaContentMetadata)
+    case none
+}
+```
+
+### Access Status
+
+Availability should be richer than local-vs-device.
+
+```swift
+enum SourceAccessMode: String, Hashable, Sendable, Codable {
+    case localFileSystem
+    case securityScopedLocalFolder
+    case usbDevice
+    case networkDevice
+    case archive
+    case unknown
+}
+
+struct SourceAccessStatus: Hashable, Sendable, Codable {
+    var availability: SourceAvailability
+    var mode: SourceAccessMode
+    var displayName: String
+    var iconSystemName: String
+    var statusText: String?
+    var warningText: String?
+}
+```
+
+### Event-Driven Scanning
+
+Providers should be able to stream discoveries, metadata, progress, and warnings.
+
+```swift
+enum ProviderEvent: Sendable {
+    case accessStatusChanged(SourceAccessStatus)
+    case stageUpdated(WorkStage)
+    case discovered(MinecraftContentItem)
+    case inspected(MinecraftContentItem)
+    case warning(ProviderWarning)
+}
+```
+
+The engine consumes events, updates source state, updates indexes, persists
+snapshots, and exposes UI-ready projections.
+
+### Source Candidate Discovery
+
+Source candidate discovery is separate from source content discovery. Candidate
+discovery answers whether a potential source exists in the current environment;
+content discovery scans an accepted source for worlds, packs, mods, and other
+items.
+
+```text
+Engine asks providers for source candidates
+  -> each provider uses its own bounded discovery process
+  -> providers stream candidate events
+  -> engine deduplicates and filters already-added sources
+  -> UI shows suggestions that the user can accept
+```
+
+For example, the Java local provider can check known macOS launcher roots and
+shallow-search likely instance folders, while Bedrock local folders can remain a
+no-op and rely on folder picking. Connected-device providers can later emit
+device-backed candidates from USB or network discovery.
+
+## Responsibilities
+
+### Engine Owns
+
+- Provider registration/routing.
+- Source candidate discovery orchestration and deduplication.
+- Source lifecycle and persistence.
+- Scan task ownership, cancellation, and worker limits.
+- Cache and snapshot persistence hooks.
+- Generic item search, sorting, counts, and projections.
+- Generic action dispatch and user-facing error normalization.
+
+### Provider Owns
+
+- Access method details.
+- Source candidate discovery strategy.
+- Discovery layout and content markers.
+- Metadata parsing.
+- Platform relationships.
+- Materialization.
+- Export formats.
+- Provider-specific progress stages and warnings.
+- Provider-specific detail metadata.
+
+## Current Fit
+
+Existing app pieces already map to this design:
+
+- `SourceAccessMethod`: provider-like boundary.
+- `SourceAccessCoordinator`: provider registry/router.
+- `SourceLibrary`: engine/orchestrator.
+- `MinecraftSource`: source session and persisted model.
+- `SourcePersistenceStore`: persistence.
+- `SourceContentIndexer`: generic indexing plus Bedrock-specific relationship
+  logic that should be split.
+- `ContentItemActionService` and `ContentPackageExporter`: action/export layer
+  that should become capability/provider aware.
+
+The main mismatch is that shared models and UI currently carry Bedrock-specific
+types and fields directly.

docs/provider-refactor-migration-plan.md

@@ -0,0 +1,92 @@
+# Provider Refactor Migration Plan
+
+This plan moves the app from a Bedrock-oriented source-access architecture to an
+engine/platform-provider architecture while keeping behavior working at each
+step.
+
+## Phase 1: Document and Name the Boundary
+
+- Add provider architecture documentation.
+- Add neutral model names alongside existing names:
+  - `MinecraftEdition`
+  - `MinecraftContentKind`
+  - `MinecraftPlatformContentType`
+  - `PlatformContentMetadata`
+  - `ContentItemCapabilities`
+  - `SourceAccessStatus`
+  - `WorkStage`
+  - `ProviderEvent`
+- Keep existing `MinecraftContentType` as a compatibility alias/wrapper until
+  call sites move.
+
+## Phase 2: Neutralize Content Items
+
+- Add edition, kind, platform type, capabilities, and platform metadata to
+  `MinecraftContentItem`.
+- Preserve existing Bedrock fields as computed compatibility accessors where
+  practical.
+- Move Bedrock world and pack metadata into `BedrockContentMetadata`.
+- Update search text to pull from generic fields and provider metadata.
+- Update tests/fixtures to construct items through the new neutral initializer.
+
+## Phase 3: Provider-Shaped Access
+
+- Introduce provider protocol types as a superset of current source access.
+- Adapt `SourceAccessMethod` to emit provider IDs and access status.
+- Register providers through a provider registry/coordinator.
+- Rename current generic local folder access to Bedrock local folder access.
+- Keep a compatibility typealias or wrapper named `LocalFolderSourceAccess` until
+  all call sites are migrated.
+
+## Phase 4: Split Bedrock Platform Module
+
+- Move Bedrock-specific scanner/metadata/export code under a Bedrock platform
+  namespace/folder.
+- Rename `WorldScanner` to `BedrockContentScanner`.
+- Rename `MinecraftContentMetadataReader` to `BedrockContentMetadataReader`.
+- Keep temporary wrappers for Quick Look and legacy call sites.
+- Move Bedrock relationship building out of generic indexing.
+
+## Phase 5: Event-Driven Scan Pipeline
+
+- Add provider events and work stages.
+- Let providers report progress stages.
+- Let the engine consume discovered/inspected events.
+- Preserve existing scan-stage behavior until provider events fully replace it.
+- Keep worker limits in the engine, with provider-declared concurrency policy as
+  a later extension.
+
+## Phase 6: Capability-Aware Actions
+
+- Move archive extension and portable export format selection off
+  `MinecraftContentType`.
+- Add item/provider capabilities for reveal/export/share/copy.
+- Adapt `ContentItemActionService` and exporters to route by provider/platform
+  type.
+- Keep Bedrock package output unchanged.
+
+## Phase 7: Java Local Provider
+
+- Add Java local provider as read-only initially.
+- Discover Java saves, resource packs, and datapacks.
+- Add Java metadata reader for `level.dat` and `pack.mcmeta` incrementally.
+- Export Java folder-backed content as `.zip` where supported.
+- Do not add Java-Bedrock conversion in this phase.
+
+## Phase 8: Cleanup
+
+- Remove compatibility aliases after UI, tests, Quick Look, and exporters use
+  provider-aware models.
+- Rename UI labels from Bedrock-specific categories where appropriate.
+- Add provider fixtures and contract tests.
+- Keep build/test verification passing after each phase.
+
+## Verification
+
+At each milestone:
+
+- Run Swift tests.
+- Run the app target build.
+- Check existing Bedrock local and connected-device behavior remains intact.
+- Add focused tests for model migration, indexing, export format selection, and
+  provider event consumption.