The tier axis comes out of the git stack — compose unconditional, postures mode-driven

HistoryStore.compose(boardRoot📒) returns non-optional and runs for
every session — the nil the gate produced was the only nil it ever had.
makeHistoryProvider is a one-axis decision: git-mode boards bind the git
provider, everything else native, in every tier; Session.tier stays
recorded, dormant. BoardGitSection shrinks to the four mode postures
(.absent and .proPointer die, BoardGitNote and the .git probe with them);
every board carries all three popover tabs (BoardInfoTab.available
retired); the titlebar branch shows on any git-mode board; the settings
sheet and card History section stop reading tier. InertGitTests is
repurposed as UntouchedGitTests — the file layer still never opens .git,
now load-bearing for mode-none boards. The accessibility audit reaches the
settings sheet at last: the fixture board hosts it in every tier, so the
free-fixture disabled-row test becomes an open-and-audit test.

Claude-Session: https://claude.ai/code/session_01SR4XGjmBE16ZUYWpfFHXwY

Kanban/App/BoardWindowHost.swift

@@ -113,8 +113,9 @@ struct BoardWindowHost: View {
     /// following walk builds (`BoardRepairRun`, `EchoLedger.adopt`).
     ///
     /// It cannot live anywhere else: the repairs run before a store exists and the receipts have to
-    /// reach that store's ledger before `beginSession` composes Pro's committer, or the app's own
-    /// repair commits as `Lanework External`. Cleared once adopted.
+    /// reach that store's ledger before `beginSession` composes a git board's committer, or the app's
+    /// own repair commits as `Lanework External`. (Pro's committer, until 12-editions.md ▸ PIVOT
+    /// 2026-08-07 made it every git board's.) Cleared once adopted.
     @State private var repairLedger: EchoLedger?
 
     @State private var phase: Phase = .opening
@@ -396,7 +397,8 @@ struct BoardWindowHost: View {
 
         // **The repair's receipts, into the board's own ledger — before the session composes**
         // (01: "On Pro boards the repairs drop heal-marked receipts and commit separately as one
-        // repair commit"). `beginSession` is where Pro's committer is built and started, and the
+        // repair commit" — every git board's since 12-editions.md ▸ PIVOT 2026-08-07, the sentence
+        // otherwise unchanged). `beginSession` is where that committer is built and started, and the
         // committer harvests the ledger it is handed; receipts adopted after that line would be
         // receipts the repair commit never sees, and the app's own repair would be authored
         // `Lanework External`.
@@ -730,31 +732,34 @@ struct BoardWindowHost: View {
         // load rather than at attach because it carries the store; the controller installs it once,
         // whichever of the two arrives second.
         //
-        // The tier and the git state come from the **session**, which `start()` began a moment ago,
-        // rather than from the entitlement or the disk: a board's popover must describe the board as
-        // it opened (12-editions.md ▸ The entitlement, "an open board finishes with the provider it
-        // composed"; 06-history-undo.md ▸ Rules, mode is an open-time fact). A `nil` session cannot
-        // happen on this path — `beginSession` precedes `configureWindow` — and reads as the free
-        // tier's posture, which is the harmless direction.
+        // The git state comes from the **session**, which `start()` began a moment ago, rather than
+        // from the entitlement or the disk: a board's popover must describe the board as it opened
+        // (12-editions.md ▸ The entitlement, "an open board finishes with the provider it composed";
+        // 06-history-undo.md ▸ Rules, mode is an open-time fact). A `nil` session cannot happen on
+        // this path — `beginSession` precedes `configureWindow` — and reads as a board with no
+        // repository, which is the harmless direction.
+        //
+        // **The tier is no longer passed down** (12 ▸ PIVOT 2026-08-07): git is tier-independent, so
+        // every one of these surfaces reads the board's mode and nothing else. `BoardSession.tier`
+        // still exists and is still recorded — it just has no git-facing consumer here.
         let session = appModel.session(for: ref)
-        // The settings sheet's two doors validate on the same pair, so they are adopted here rather
+        // The settings sheet's two doors validate on the same fact, so it is adopted here rather
         // than read again somewhere else: the popover's Board Settings… row and Board ▸ Board
         // Settings… must never disagree about whether this board has setup to show
         // (`BoardSettingsAvailability`). The mode *inside* the git state stays live — add-git flipping
         // it re-resolves the sheet's sections and both doors, which is the one mid-session transition
         // 06 sanctions.
-        boardSettings.adopt(tier: session?.tier ?? .free, git: session?.git)
+        boardSettings.adopt(git: session?.git)
         windowController.installTitlebarAccessory(
             boardInfoTitlebarAccessory(
                 store: store,
                 recents: appModel.styleRecents,
-                tier: session?.tier ?? .free,
                 git: session?.git,
                 presentation: boardInfo,
                 settings: boardSettings
             )
         )
-        // The widget above now says the board's name (and, on a git-mode Pro board, its branch)
+        // The widget above now says the board's name (and, on a git-mode board, its branch)
         // itself, so the system title display would only repeat it — the card-window seam
         // (`CardWindowHost.configureWindow`, `HostedWindowController.hideTitle`), applied here for
         // the same reason. `.navigationTitle(windowTitle)` a few lines up in `body` is untouched —