docs(feature-flows): add database-migration-runner flow (#1160)#1277
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Sync feature-flow docs after the migration-runner safety work in a245765 (#1160 / #1183). New vertical-slice doc covering the cross-process flock (db/migration_lock.py), the atomic rename-swap rebuild (_atomic_rebuild) that closes the DROP->re-insert data-loss window, the lock-wrapped init_database() boot sequence, add_note failure naming, and the /health 503 first_pending operator surface. Index: one Recent Updates row + one System & Infrastructure row. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Announcement of the published workshop recording, sent to Discord, Slack, Telegram, GitHub Discussions, and both Twitter/X accounts. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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dolho
approved these changes
Jun 22, 2026
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What
Syncs feature-flow documentation after the migration-runner safety work landed in
a2457654(#1160 / #1183). Docs-only change — no code touched.Adds a new vertical-slice flow doc,
docs/memory/feature-flows/database-migration-runner.md, covering:flock(db/migration_lock.py) that serialises the SQLite migration suite across uvicorn workers + the scheduler container,migrations.py:_atomic_rebuild) that closes theDROP→re-insert data-loss window,init_database()boot sequence,add_notefailure naming, and/health503first_pendingoperator surface.Grounded in the 391-line
tests/unit/test_1160_migration_atomicity.py; every symbol/line-ref verified against source. It's the end-to-end companion to Architectural Invariant #3 (already updated in the original commit).Index
Notes
Generated via
/sync-feature-flowsover the last 5 commits. The other four commits (3 dependency/CI bumps + the #722 prod-compose forwarding, whose only code change was a zero-behavior dead-import cleanup) needed no doc updates.🤖 Generated with Claude Code