The seams unbind — the provider is always native, and the git stack compiles dead

Step 4 of strategy/01-git-excision.md, the entangled one: AppModel's makeHistoryProvider collapses to the native provider (the seam stays injectable per the reversibility posture), the session's git state and its wiring go (wireGitUndo, wireBranchSwitching, the card-session staging threading), BoardStore sheds commitSeam and the identity-history ranker (the loader's nil-safe rung now tops out at birth date — today's no-git behavior), SessionSettleGate keeps the gate and inherits the path utility it borrowed, BoardRegistry drops the persisted operation stamp (decode-safe), and the git banner family leaves BannerCenter with its announcer and accessibility phrases. One missed harvest tie severed (the narrator's root subject is its own now). Nothing outside Kanban/Git/ references the stack — proven by sweep. 2,855 tests green.

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

Kanban/History/HistoryProviding.swift

@@ -363,9 +363,9 @@ public protocol HistoryProviding: AnyObject {
 
 extension HistoryProviding {
 
-    /// **A substrate that keeps no steps holds no backing** — the git provider's honest answer
-    /// (`GitHistoryProvider.register` retires every step on arrival, which is what makes "purge rides
-    /// the close flush" true on Pro), and a test fake's.
+    /// **A substrate that keeps no steps holds no backing** — the honest answer for any provider that
+    /// retires every step on arrival (which is what makes "purge rides the close flush" true over such
+    /// a substrate), and a test fake's.
     ///
     /// A default on the requirement rather than a free function, so the dispatch is the substrate's:
     /// an implementation that *does* keep steps overrides it and every caller through `any