**FileCredentialStore.save wrote every save through one fixed `<cache>.tmp`.**
Two processes share a credential cache (a long-running stream and a periodic
sync), so one could rename the other's half-written temp file into place and
leave a truncated refresh token behind. Each save now gets its own mkstemp
file in the same directory -- created 0600 from the outset, so the token is
never world-readable -- and replaces the cache atomically. A failed write
unlinks its temp file and leaves the previous cache untouched.
Tests cover: no temp file left after a save, distinct temp names per write,
and an interrupted write keeping the old credentials with no leaked temp.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018RHwVPyiiQMPh4M3JQwQku
The three Python packages pinned ruff twice at different versions:
requirements.txt at 0.16.7, .pre-commit-config.yaml at v0.15.2. Only the
older one ever ran, so `select = ["ALL"]` was enforced two minor versions
behind. Measured before aligning: v0.15.2 reports 0 findings, every 0.16.x
reports CPY001 on each file -- 70 crdt-sync, 23 freedays, 71 gatelock, and
no other rule.
Resolved by adding the notice rather than ignoring the rule, so the gate
keeps its teeth.
Two gatelock modules sat at exactly the 250-line cap, so a one-line header
tipped them to 251. Both are split along a real seam rather than shaved:
_widget_fills.py colour arithmetic over LockConfig, no tkinter import
_surfaces_focus.py selects among existing surfaces, never mutates them
The focus split keeps _surfaces.py's documented containment (it stays the
only module that creates, moves or destroys windows), and the static guard
in test_recovery_invariants.py globs _surfaces*.py, so the new sibling is
covered with no list to extend. widgets.py re-exports the fills helpers,
which keeps gatelock.widgets the single public surface its tests import.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019kMvSMtsVMB3d2uoZ56pbp
Both libraries had already moved `requires-python` to 3.14, but ruff, mypy and
pylint were still grading against 3.10 -- three tools judging an interpreter
nothing runs any more, and ruff withholding the pyupgrade fixes that only
become safe at the newer target. `pin_ci_python.py` rewrites these three knobs.
What the stale target was hiding: `datetime.timezone.utc` where `datetime.UTC`
is now correct (UP017), a dead `timezone` import left behind by it, and ruff's
stable formatter applying PEP 758 -- `except (A, B):` becomes `except A, B:`.
That last one makes the source 3.14-only at the syntax level, which is what
`requires-python = ">=3.14"` already promised; kuhy chose it deliberately over
holding ruff a release back (2026-08-29).
These two are libraries the apps install, so the floor matters more here than
anywhere else in the fleet -- every consumer already pins >=3.14.
Per project: ruff, ruff-format, mypy --strict and pylint clean, crdt-sync 432
tests and gatelock 389 tests, both at 100% line and branch coverage.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SfnJmxxsZ534AKk16rC2Gr
The hook entry was an absolute /home/kuhy/utils path, copied from a config
written for ~/.claude where it only ever ran locally. On an Actions runner
that is exit code 127 — "No such file or directory" — so gatelock-precommit
and crdt-sync-precommit failed on every commit of this refactor while the
hook silently checked nothing. Now repo-relative, matching the sibling hooks
(`entry: scripts/check_subproject_scope.sh`): pre-commit always runs from the
git root, so it resolves the same in both places.
Fixing that made the CI configs runnable locally, and `--all-files` then found
what per-file runs had missed — ruff pruning imports that exist *for* their
re-export. `import crdt_sync` was broken three separate ways (FileSyncStateStore,
encode_key, FileCredentialStore). Each affected module now states an explicit
__all__ so the autofixer cannot take them again, and the two files that pushed
past the cap once __all__ was added are split further:
_firebase.py 260 -> 247 + _fberrors 25
_sync.py 257 -> 188 + _syncargs 91
Test patch targets followed the code they patch: gatelock._outputs.shutil ->
_xrandr.shutil, gatelock._arbiter.Path -> _claims.Path.
gatelock and crdt-sync both pass `pre-commit run --all-files` in full;
389 and 259 tests at 100% branch coverage; the root gate exits 0.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CFSGeWxHPY5rHUGrPqhcmG
test_firebase_auth.py 439 -> 170 + _google 159 + _tokens 159 + _session 175
test_sync_revisions.py 406 -> 163 + _peers 162 + _backends 216
test_firebase.py 369 -> 212 + _writes 221
test_mirror.py 364 -> 178 + _fallback 229
test_config.py 355 -> 139 + _credentials 112 + _client 233
test_github.py 301 -> 127 + _writes 219
test_sync.py 271 -> 195 + _skips 130
Cut at concern boundaries, not line counts: test_sync_skips.py holds the five
cases where a peer's pushed file is missing, corrupt, wrong-shaped or our own
— one story about what sync_log declines to merge — rather than an arbitrary
half of the original class.
259 passed at 100% branch coverage, verified against a clean HEAD worktree.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CFSGeWxHPY5rHUGrPqhcmG
