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8fd9b7da79
Replaces the O(N sync_changes) LWW replay in every tick with an
incremental snapshot table refresh. Each tick now applies only the
delta since the last run, then runs a single indexed SELECT on the
snapshot table to find due missions.
- `db/migrate.ts` — idempotent migration. Creates `mana_ai` schema and
`mana_ai.mission_snapshots` table on boot. Partial index on
active+nextRunAt powers the tick's "due" query.
- `db/snapshot-refresh.ts`
- `refreshSnapshots(sql)` one-pass: joins sync_changes and snapshots
on (user_id, mission_id), picks out pairs whose source max
created_at exceeds the snapshot cursor. Per-pair refresh wrapped
in `withUser` for RLS scoping on the source SELECT.
- Bootstrap: missing snapshot rows seed from a full replay of their
mission's history; subsequent ticks apply only the delta.
- Delete tombstones purge the snapshot row.
- `db/missions-projection.ts` `listDueMissions` — single SELECT against
`mana_ai.mission_snapshots` with an indexed WHERE. Dropped the legacy
cross-user scan + per-user two-phase read (unused now). `mergeAndFilter`
stays for its existing test coverage.
- `cron/tick.ts` calls `refreshSnapshots` before `listDueMissions` and
logs when the refresh actually applied rows. No behaviour change
externally.
- `index.ts` awaits `migrate()` on boot (top-level `await` — Bun
supports it natively).
Closes the last item on the AI-Workbench roadmap's "future work" list.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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| CLAUDE.md | ||
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