The message engine outlives its substrate — harvested to Kanban/Changes/ as the change narrator

Step 2 of strategy/01-git-excision.md: CommitMessageEngine and the composer seam relocate to a neutral module renamed away from commit vocabulary (ChangeNarrator, ChangeNarrationRequest, ChangeNarrating, SemanticChangeNarration, ChangeAuthorship), GitChangedPath extracts from GitCommitOperation as ChangedPath, and the one git tie severs — authorship's foreign case carries a display name, not a GitIdentity. The spec tests transplant as ChangeNarratorTests, alive until the journal work begins. 3,009 tests green.

Claude-Session: https://claude.ai/code/session_014PtZdPwqZuqEDLc6wZMtEy

Kanban/Git/CommitAttribution.swift

@@ -53,20 +53,20 @@ public struct HarvestedReceipt: Sendable, Equatable {
 public struct CommitSplit: Sendable, Equatable {
 
     /// Changes nobody vouched for — an agent, a text editor, a terminal, or a blind window at launch.
-    public var foreign: [GitChangedPath] = []
+    public var foreign: [ChangedPath] = []
 
     /// The scheduled healers' paths, heal-marked in the ledger by the Writer operations that made
     /// them (`EchoLedger.markHeal`).
-    public var heal: [GitChangedPath] = []
+    public var heal: [ChangedPath] = []
 
     /// The user acting through the app.
-    public var user: [GitChangedPath] = []
+    public var user: [ChangedPath] = []
 
     public init() {}
 
     /// One class of one window's changes, ready to become a commit.
     public struct Group: Sendable, Equatable {
-        public let paths: [GitChangedPath]
+        public let paths: [ChangedPath]
         /// Which class it is — carried rather than re-derived, so the planner never has to ask a
         /// list whether it contains its own members.
         public let kind: Kind
@@ -171,7 +171,7 @@ public enum CommitAttribution {
     /// The **nearest** receipt wins, so a rewritten `index.md` inside a moved folder answers with
     /// its own content receipt rather than with the move above it.
     public static func split(
-        _ paths: [GitChangedPath],
+        _ paths: [ChangedPath],
         under boardRoot: URL,
         receipts: [String: HarvestedReceipt]
     ) -> CommitSplit {
@@ -236,7 +236,7 @@ public enum CommitAttribution {
     /// does — which is why the agent guide teaches re-stamping on move.
     ///
     /// A window of nothing but rename departures leaves no stamp to agree on and falls back too.
-    public static func foreignIdentity(for paths: [GitChangedPath], under boardRoot: URL) -> GitIdentity {
+    public static func foreignIdentity(for paths: [ChangedPath], under boardRoot: URL) -> GitIdentity {
         var stamps: Set<String> = []
         for path in paths {
             if path.isDeletion {