Server-side:
- sync_changes gains a nullable space_id TEXT column + partial index
on (user_id, space_id, app_id, created_at) WHERE space_id IS NOT NULL.
- RecordChange takes spaceID as a first-class parameter; *string so
empty strings land as real SQL NULL and the partial index skips them.
- ChangeRow + all three SELECTs (GetChangesSince, GetAllChangesSince,
StreamAllUserChanges) propagate space_id through to clients.
- changeFromRow surfaces SpaceID on the wire Change shape.
- New extractSpaceID helper reads the incoming payload — prefers top-
level spaceId, falls back to data.spaceId (inserts) or
fields.spaceId.value (updates). Tolerates pre-v28 clients.
- 6 Go tests cover the helper + round-trip.
Client-side:
- PendingChange gains an optional spaceId.
- Dexie creating hook stamps spaceId from the active record onto the
pending-change row (already set by the v28 scope hook).
- Dexie updating hook reads spaceId from the pre-update record and
stamps it on the pending-change so updates carry space context even
though spaceId itself is immutable and never in `fields`.
- buildChangeset forwards spaceId to the server.
Explicitly NOT in scope this pass:
- RLS remains user_id-scoped; multi-member shared-space reads need a
second policy that joins against auth.members. Follow-up once shared
spaces are actually used — today everything is personal.
- Subscription fan-out is still per-user; fan-out to all members of a
shared space is part of the same follow-up.
Go tests: 6/6 pass. Web type-check clean (0 errors across 7139 files).
Plan: docs/plans/spaces-foundation.md
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
