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
The popover's third tab settles (03 ▸ Git tab, 2026-08-07): BoardGitTabView
takes the parked section — the six-posture matrix, the Pro pointer, the
nested/unverifiable prose, the branch controls, the Board Settings… door —
with the tab label doing the old "Git" header's naming work, and one new
caption for the no-repository posture. BoardInfoTab.available drops the Git
tab exactly where BoardGitSection resolves absent, carrying 12's
absent-no-placeholder rule up to the tab strip; selection resets to Info per
open, now a ruling. Daily face only — the remote block still joins with
pro-m2.
Claude-Session: https://claude.ai/code/session_01SR4XGjmBE16ZUYWpfFHXwY
rzen