Adopt git-native history (TSD §A.5): a VERSION-gated history(key) surfaces the
commit list for a path (newest-first sha + subject) — declared by every git-IS-store
shard, read-only or not. Integration proves the union/overlay/edit machinery works
unchanged across folder + git substrates: resolve/chorus span both, edit through a
git shard fast-forwards as a commit, apply-under-drift refuses on an external commit
(sha drift) without clobbering, and a read-only git target keeps the overlay as a
draft. SCOPE updated; WP-0012 done. 196 tests green.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Writable mode: write(key, body) stages and commits the file (skipping a no-op so
no empty commit is created), returning the page at the new commit sha. The
writable profile declares WRITE + VERSION with PER_PAGE granularity. current_rev
is the per-path commit sha, so a write — or an external commit to the same path —
moves it, driving apply-under-drift. Passes the conformance positive-write probe.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
A second substrate validating the contract beyond plain folders: a git-IS-store
shard reading Markdown from a git repo. Keys are tracked *.md paths; read returns
a Page whose source_rev is the per-path last-commit sha (so an edit to one page
never drifts another); profile is git-IS-store / substrate=git / history=git-native
/ addressing=path, validated against the §6.5 implication rules. Passes the
conformance read path with honest absence of unclaimed verbs. Zero new deps
(git CLI via subprocess). No core changes.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
