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/LiveStore/BoardRegistry.swift

@@ -158,16 +158,6 @@ public struct BoardRecord: Codable, Sendable, Equatable, Identifiable {
     /// `UserDefaults`.
     public var remoteLocationWarned: Bool
 
-    /// **A bracketed git operation this app started and has not finished** (06-history-undo.md ▸ Rules
-    /// ▸ Abnormal repo states: "every bracketed operation stamps its intent app-side (per-board
-    /// registry) before touching the repo").
-    ///
-    /// `nil` for every board that is not mid-operation, which is every board almost all of the time:
-    /// the stamp is written immediately before the repository is touched and cleared as soon as the
-    /// operation is over, so finding one at open means the app died in between. See
-    /// `GitOperationStamp` for why it lives here rather than in the board folder or under `.git`.
-    public var gitOperationStamp: GitOperationStamp?
-
     public init(
         id: UUID = UUID(),
         bookmark: Data,
@@ -182,8 +172,7 @@ public struct BoardRecord: Codable, Sendable, Equatable, Identifiable {
         pushOnCommit: Bool = false,
         remoteLocationWarned: Bool = false,
         icon: String? = nil,
-        iconColor: String? = nil,
-        gitOperationStamp: GitOperationStamp? = nil
+        iconColor: String? = nil
     ) {
         self.id = id
         self.bookmark = bookmark
@@ -199,7 +188,6 @@ public struct BoardRecord: Codable, Sendable, Equatable, Identifiable {
         self.remoteLocationWarned = remoteLocationWarned
         self.icon = icon
         self.iconColor = iconColor
-        self.gitOperationStamp = gitOperationStamp
     }
 
     // MARK: Codable
@@ -227,7 +215,6 @@ public struct BoardRecord: Codable, Sendable, Equatable, Identifiable {
         case iconColor
         case pushOnCommit
         case remoteLocationWarned
-        case gitOperationStamp
     }
 
     public init(from decoder: any Decoder) throws {
@@ -246,11 +233,6 @@ public struct BoardRecord: Codable, Sendable, Equatable, Identifiable {
         iconColor = try container.decodeIfPresent(String.self, forKey: .iconColor)
         pushOnCommit = try container.decodeIfPresent(Bool.self, forKey: .pushOnCommit) ?? false
         remoteLocationWarned = try container.decodeIfPresent(Bool.self, forKey: .remoteLocationWarned) ?? false
-        // Tolerant twice over: absent on every record written before this key existed, and absent
-        // again — rather than fatal — if a future build's stamp `Kind` is one this build cannot name.
-        // A stamp that cannot be read is a stamp that cannot recover anything, which degrades to the
-        // pause-and-defer stance rather than to a quarantined registry.
-        gitOperationStamp = try? container.decodeIfPresent(GitOperationStamp.self, forKey: .gitOperationStamp)
     }
 
     public func encode(to encoder: any Encoder) throws {
@@ -269,7 +251,6 @@ public struct BoardRecord: Codable, Sendable, Equatable, Identifiable {
         try container.encodeIfPresent(iconColor, forKey: .iconColor)
         try container.encode(pushOnCommit, forKey: .pushOnCommit)
         try container.encode(remoteLocationWarned, forKey: .remoteLocationWarned)
-        try container.encodeIfPresent(gitOperationStamp, forKey: .gitOperationStamp)
         // An unknown key is dropped, exactly as the synthesized conformance dropped it: the file's
         // forward tolerance is a decoding property, and nothing here preserves what it cannot read.
     }
@@ -599,22 +580,6 @@ public final class BoardRegistry {
         update(id) { $0.remoteLocationWarned = true }
     }
 
-    /// **Records — or clears — the bracketed git operation this app is about to run**
-    /// (`GitOperationStamp`).
-    ///
-    /// It saves the file synchronously like every other setter here, and that is load-bearing rather
-    /// than incidental: the whole value of the stamp is that it is on disk *before* the repository is
-    /// touched, so a crash a millisecond later is still recognizable as this app's. `save()` writes
-    /// atomically, so the file a next launch reads is either the old one or this one.
-    public func setGitOperationStamp(id: UUID, _ stamp: GitOperationStamp?) {
-        update(id) { $0.gitOperationStamp = stamp }
-    }
-
-    /// The stamp this board is carrying, if any — read once per session, at open.
-    public func gitOperationStamp(id: UUID) -> GitOperationStamp? {
-        record(id: id)?.gitOperationStamp
-    }
-
     // MARK: - Reading
 
     /// Every known board, most recently opened first, each classified by whether its bookmark