Supersedes per-space-vs-user-global-tags.md (which recommended defer
under "ship fast" assumptions). Pre-live + unlimited resources changes
the calculus: build the clean architecture now.
Decision: tags, tag-groups, workbench scenes, AI agents, and AI
missions all become Space-scoped. Only identity (user, session,
profile, MK key) and per-device UI prefs stay user-level.
Plan covers 8 phases across ~3–4 days:
1. Audit + schema design
2. Dexie migration (with backfill to user's Personal-Space)
3. Store APIs (implicit via scopedForModule wrapper)
4. Space-switch side-effects (reset active scene, bootstrap defaults)
5. Space-creation seeding (one-shot copy tags from Personal)
6. Backend (mana-sync + Postgres + RLS)
7. Docs + memory updates
8. Delete the old deferred plan
Includes edge cases, success criteria, and reasoning for why β over γ
(two clear levels beat one recursive primitive for user clarity).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
