Show source candidate details before adding

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

@@ -115,6 +115,8 @@ nonisolated struct MinecraftSource: Identifiable, Hashable, Sendable {
         }
 
         switch selection {
+        case .sourceCandidate:
+            return []
         case .source(let sourceID), .allContent(let sourceID):
             guard sourceID == id else {
                 return []

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

@@ -7,6 +7,7 @@ import SwiftUI
 struct ItemDetailColumnView: View {
     let item: MinecraftContentItem?
     let source: MinecraftSource?
+    let sourceCandidate: SourceCandidate?
     let showsSourceDetails: Bool
     let behaviorPacks: [ContentPackReference]
     let resourcePacks: [ContentPackReference]
@@ -22,6 +23,8 @@ struct ItemDetailColumnView: View {
     let exportAction: () -> Void
     let revealAction: () -> Void
     let shareAction: (NSView?) -> Void
+    let addCandidateSourceAction: (SourceCandidate) -> Void
+    let revealCandidateAction: (SourceCandidate) -> Void
 
     var body: some View {
         Group {
@@ -46,6 +49,16 @@ struct ItemDetailColumnView: View {
                 )
             } else if showsSourceDetails, let source {
                 SourceDetailView(source: source)
+            } else if let sourceCandidate {
+                SourceCandidateDetailView(
+                    candidate: sourceCandidate,
+                    addAction: {
+                        addCandidateSourceAction(sourceCandidate)
+                    },
+                    revealAction: {
+                        revealCandidateAction(sourceCandidate)
+                    }
+                )
             } else {
                 Text("Select a world or pack to see details")
                     .foregroundStyle(.secondary)

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/Preview/PreviewFixtures.swift

@@ -355,6 +355,7 @@ struct ItemDetailColumnPreviewContainer: View {
             ItemDetailColumnView(
                 item: PreviewFixtures.featuredWorld,
                 source: PreviewFixtures.primarySource,
+                sourceCandidate: nil,
                 showsSourceDetails: false,
                 behaviorPacks: PreviewFixtures.primarySource.resolvedPackReferences(for: PreviewFixtures.featuredWorld.id, type: .behaviorPack),
                 resourcePacks: PreviewFixtures.primarySource.resolvedPackReferences(for: PreviewFixtures.featuredWorld.id, type: .resourcePack),
@@ -369,7 +370,9 @@ struct ItemDetailColumnPreviewContainer: View {
                 exportTitle: PreviewFixtures.featuredWorld.contentType.exportTitle,
                 exportAction: {},
                 revealAction: {},
-                shareAction: { _ in }
+                shareAction: { _ in },
+                addCandidateSourceAction: { _ in },
+                revealCandidateAction: { _ in }
             )
         }
     }

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

@@ -45,6 +45,7 @@ struct ContentView: View {
     var body: some View {
         let isEmptyLibrary = library.visibleSources.isEmpty && library.connectedDevices.isEmpty
         let resolvedCurrentSource = currentSource
+        let resolvedCurrentSourceCandidate = currentSourceCandidate
         let currentProjectionRequest = ItemCollectionProjectionRequest(
             selection: selectedSidebarSelection,
             searchText: searchText,
@@ -122,6 +123,7 @@ struct ContentView: View {
             ItemDetailColumnView(
                 item: resolvedCurrentSelectedItem,
                 source: resolvedCurrentSource,
+                sourceCandidate: resolvedCurrentSourceCandidate,
                 showsSourceDetails: resolvedCurrentSelectedItem == nil && isSourceOverviewSelection,
                 behaviorPacks: resolvedCurrentSelectedItem.map { logicalPackReferences(for: $0, type: .behaviorPack) } ?? [],
                 resourcePacks: resolvedCurrentSelectedItem.map { logicalPackReferences(for: $0, type: .resourcePack) } ?? [],
@@ -154,7 +156,9 @@ struct ContentView: View {
                     }
 
                     shareItem(item, from: anchorView)
-                }
+                },
+                addCandidateSourceAction: addCandidateSource(_:),
+                revealCandidateAction: revealCandidateInFinder(_:)
             )
             .frame(minWidth: 450)
         }
@@ -255,6 +259,14 @@ 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 func currentSelectedItem(in source: MinecraftSource?) -> MinecraftContentItem? {
         guard let selectedItemID else {
             return nil
@@ -595,6 +607,10 @@ struct ContentView: View {
         }
     }
 
+    private func revealCandidateInFinder(_ candidate: SourceCandidate) {
+        NSWorkspace.shared.activateFileViewerSelecting([candidate.sourceRootURL])
+    }
+
     private func handleDroppedProviders(_ providers: [NSItemProvider]) -> Bool {
         let fileURLType = UTType.fileURL.identifier
         let supportedProviders = providers.filter { $0.hasItemConformingToTypeIdentifier(fileURLType) }
@@ -654,8 +670,18 @@ struct ContentView: View {
     }
 
     private func syncSelection(with sourceIDs: [URL]) {
-        if let selectedSidebarSelection, !sourceIDs.contains(selectedSidebarSelection.sourceID) {
+        if let selectedSidebarSelection {
-            self.selectedSidebarSelection = sourceIDs.first.map { .source(sourceID: $0) }
+            switch selectedSidebarSelection {
+            case .sourceCandidate(let candidateID):
+                if !library.sourceCandidates.contains(where: { $0.id == candidateID }) {
+                    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)
         }

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

@@ -77,6 +77,8 @@ enum ItemCollectionProjector {
         }
 
         switch selection {
+        case .sourceCandidate:
+            return "Source Candidate"
         case .source, .allContent:
             return "All Items"
         case .contentType(_, let contentType):
@@ -88,6 +90,8 @@ enum ItemCollectionProjector {
 
     nonisolated static func searchPrompt(for selection: SidebarSelection?, source: MinecraftSource?) -> String {
         switch selection {
+        case .some(.sourceCandidate):
+            return "Search Library"
         case .some(.source):
             return "Search \(source?.displayName ?? "Library")"
         case .some(.allContent):
@@ -103,6 +107,8 @@ enum ItemCollectionProjector {
 
     nonisolated private static func searchScopeTitle(for selection: SidebarSelection?) -> String {
         switch selection {
+        case .some(.sourceCandidate):
+            return "Source Candidate"
         case .some(.source):
             return "Library"
         case .some(.allContent):
@@ -122,6 +128,8 @@ enum ItemCollectionProjector {
         }
 
         switch selection {
+        case .sourceCandidate:
+            return "items"
         case .source, .allContent:
             return scopedItemCount == 1 ? "item" : "items"
         case .contentType(_, let contentType):

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

@@ -5,14 +5,17 @@ import SwiftUI
 
 enum SidebarSelection: Hashable, Sendable {
     case source(sourceID: URL)
+    case sourceCandidate(candidateID: 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, _), .contentKind(let sourceID, _):
             return sourceID
+        case .sourceCandidate:
+            return nil
         }
     }
 }
@@ -65,9 +68,16 @@ struct SourcesSidebarView: View {
             if !sourceCandidates.isEmpty {
                 Section {
                     ForEach(sourceCandidates) { candidate in
-                        SourceCandidateRow(candidate: candidate) {
+                        SourceCandidateRow(
-                            addCandidateSourceAction(candidate)
+                            candidate: candidate,
-                        }
+                            onSelect: {
+                                selection = .sourceCandidate(candidateID: candidate.id)
+                            },
+                            addAction: {
+                                addCandidateSourceAction(candidate)
+                            }
+                        )
+                        .tag(SidebarSelection.sourceCandidate(candidateID: candidate.id) as SidebarSelection?)
                         .listRowSeparator(.hidden)
                         .listRowInsets(EdgeInsets(top: 4, leading: 8, bottom: 4, trailing: 8))
                     }
@@ -153,6 +163,7 @@ struct SourcesSidebarView: View {
 
 private struct SourceCandidateRow: View {
     let candidate: SourceCandidate
+    let onSelect: () -> Void
     let addAction: () -> Void
 
     var body: some View {
@@ -179,6 +190,8 @@ private struct SourceCandidateRow: View {
             .buttonStyle(.borderless)
             .help("Add Source")
         }
+        .contentShape(Rectangle())
+        .onTapGesture(perform: onSelect)
         .padding(.vertical, 4)
     }