diff --git a/App/Features/AI/AIDocumentSheet.swift b/App/Features/AI/AIDocumentSheet.swift
index bd9ba96..cb19b29 100644
--- a/App/Features/AI/AIDocumentSheet.swift
+++ b/App/Features/AI/AIDocumentSheet.swift
@@ -22,7 +22,7 @@ struct AIDocumentSheet: View {
     /// populated without the host having to hold lists it does not otherwise need.
     @State private var lists: [OwnedList] = []
     /// Documents the user owns, offered when deriving from an article.
-    var documents: [Document] = []
+    var documents: [InterlinedDomain.Document] = []
     /// Called after a drafted document is created, so the host can reload it.
     var onCreated: (() async -> Void)?
 
diff --git a/App/Features/Documents/ConflictBannerView.swift b/App/Features/Documents/ConflictBannerView.swift
index 04b1586..8997aeb 100644
--- a/App/Features/Documents/ConflictBannerView.swift
+++ b/App/Features/Documents/ConflictBannerView.swift
@@ -15,7 +15,7 @@ import InterlinedDomain
 struct ConflictBannerView: View {
 
     let pending: ConflictBannerViewModel.Pending
-    let onOpenLocalCopy: (Document.ID) -> Void
+    let onOpenLocalCopy: (InterlinedDomain.Document.ID) -> Void
     let onDismiss: () -> Void
 
     var body: some View {
diff --git a/App/Features/Documents/DocumentEditorView.swift b/App/Features/Documents/DocumentEditorView.swift
index d4d6070..9d67308 100644
--- a/App/Features/Documents/DocumentEditorView.swift
+++ b/App/Features/Documents/DocumentEditorView.swift
@@ -21,7 +21,7 @@ import Textual
 struct DocumentEditorView: View {
 
     let viewModel: DocumentEditorViewModel
-    let onOpenLocalCopy: (Document.ID) -> Void
+    let onOpenLocalCopy: (InterlinedDomain.Document.ID) -> Void
 
     var body: some View {
         VStack(spacing: 0) {
diff --git a/App/Features/Documents/DocumentTemplatePickerView.swift b/App/Features/Documents/DocumentTemplatePickerView.swift
index ad4b203..330a2da 100644
--- a/App/Features/Documents/DocumentTemplatePickerView.swift
+++ b/App/Features/Documents/DocumentTemplatePickerView.swift
@@ -36,7 +36,7 @@ struct DocumentTemplatePickerView: View {
 
     /// Called with the created document on success so the caller (the root
     /// view) can bind the editor to it. Not called on failure.
-    let onCreated: (Document) -> Void
+    let onCreated: (InterlinedDomain.Document) -> Void
 
     /// The built-in catalog to present. Defaults to the bundled built-ins;
     /// injectable so previews can substitute a list.
diff --git a/App/Features/Documents/DocumentsListView.swift b/App/Features/Documents/DocumentsListView.swift
index e0935c4..90436dd 100644
--- a/App/Features/Documents/DocumentsListView.swift
+++ b/App/Features/Documents/DocumentsListView.swift
@@ -9,10 +9,27 @@
 import SwiftUI
 import InterlinedDomain
 
+// `Document` is written as `InterlinedDomain.Document` throughout the SwiftUI
+// files in this feature, and that qualification is load-bearing.
+//
+// The macOS 27 SDK added a `Document` **protocol** to SwiftUI
+// (`protocol Document: ReadableDocument, WritableDocument`), which collides with
+// the domain's `Document` **struct** in any file importing both — which is every
+// documents view. Before Xcode 27 the bare name resolved; after it, the same
+// source stopped compiling with `'Document' is ambiguous for type lookup`
+// (GitHub #98).
+//
+// The domain type is not renamed: `Document` is the right name for it, it is
+// correct across Kit, Domain, Persistence and their tests, and renaming a core
+// model to dodge a collision in one consumer is the tail wagging the dog. A
+// `typealias` would shorten the use sites at the cost of giving one concept two
+// names. Only the SwiftUI-importing files need this; the view models import
+// Foundation and Observation, not SwiftUI, and are unaffected.
+
 struct DocumentsListView: View {
 
     let viewModel: DocumentsListViewModel
-    let onSelect: (Document.ID?) -> Void
+    let onSelect: (InterlinedDomain.Document.ID?) -> Void
 
     /// Source of the **Move to folder** destinations. Optional so the column
     /// still renders in isolation (previews, and any future host that has no
@@ -21,7 +38,7 @@ struct DocumentsListView: View {
 
     /// Called with the document that was moved, so the host can rebind an open
     /// editor to the server's relocated copy.
-    var onMoved: ((Document) -> Void)? = nil
+    var onMoved: ((InterlinedDomain.Document) -> Void)? = nil
 
     var body: some View {
         List(selection: Binding(
@@ -103,7 +120,7 @@ struct DocumentsListView: View {
 // MARK: - DocumentRowView
 
 private struct DocumentRowView: View {
-    let document: Document
+    let document: InterlinedDomain.Document
 
     var body: some View {
         VStack(alignment: .leading, spacing: 2) {
diff --git a/App/Features/Documents/DocumentsRootView.swift b/App/Features/Documents/DocumentsRootView.swift
index b52561b..dd1fa43 100644
--- a/App/Features/Documents/DocumentsRootView.swift
+++ b/App/Features/Documents/DocumentsRootView.swift
@@ -433,7 +433,7 @@ struct DocumentsRootView: View {
     /// was started from the editor, so there is exactly one optimistic-rollback
     /// implementation rather than two that can disagree.
     private func handleMove(
-        documentID: Document.ID,
+        documentID: InterlinedDomain.Document.ID,
         to destination: FolderNode.ID?,
         folderTree: FolderTreeViewModel,
         documentsList: DocumentsListViewModel,
@@ -449,7 +449,7 @@ struct DocumentsRootView: View {
     }
 
     private func handleOpenLocalCopy(
-        _ id: Document.ID,
+        _ id: InterlinedDomain.Document.ID,
         documentsList: DocumentsListViewModel,
         editor: DocumentEditorViewModel
     ) {
diff --git a/App/Features/Documents/PublicUserDocumentsView.swift b/App/Features/Documents/PublicUserDocumentsView.swift
index 9613180..8914bef 100644
--- a/App/Features/Documents/PublicUserDocumentsView.swift
+++ b/App/Features/Documents/PublicUserDocumentsView.swift
@@ -111,7 +111,7 @@ struct PublicUserDocumentsView: View {
 
 private struct PublicDocumentRow: View {
 
-    let document: Document
+    let document: InterlinedDomain.Document
 
     var body: some View {
         VStack(alignment: .leading, spacing: 2) {
diff --git a/App/Features/Search/SearchRootView.swift b/App/Features/Search/SearchRootView.swift
index dad88a5..c5479de 100644
--- a/App/Features/Search/SearchRootView.swift
+++ b/App/Features/Search/SearchRootView.swift
@@ -266,7 +266,7 @@ struct SearchRootView: View {
 /// a relative "updated" stamp. Kept local to the Search feature because
 /// the Documents feature's own row component is file-private.
 private struct DocumentSearchRow: View {
-    let document: Document
+    let document: InterlinedDomain.Document
 
     var body: some View {
         VStack(alignment: .leading, spacing: 6) {