Fourth Codex (gpt-6.1-sol, xhigh) pass over 5e0831d, each item verified
before fixing:
- sync inspects the local database under the shared lock, so another
sync cannot swap it under that connection.
- symlinks are resolved by reading the link (db::resolve_db_path), not
canonicalize, so a symlinked path finds the same lock and install
target even while the real file is missing (fresh install, mid-swap)
or the link dangles.
- readers go ahead unlocked when no lock file can be created; nothing
can replace the database there. (A read-only data directory still
fails in SQLite's WAL setup, as in 0.2.4.)
- XLSX shared strings are capped at 2,000,000 entries.
Verified live: an install waits for a reader's shared lock; a symlinked
db_path waits on the real path's lock and stays a symlink. CLI goldens
unchanged; live A/B vs 0.2.4: 16 passed, discover hits the IDX 403 on
both builds (exit 4 vs 1, intended).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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