Spaces are now nestable — any space can embed references to other spaces
via SpaceRef, with a permission cascade model (most-restrictive-wins at
each nesting boundary). Every EncryptID registration auto-provisions a
sovereign space at <username>.rspace.online with consent-based nesting
controls.
Key additions:
- NestPolicy per space (open/members/approval/closed consent levels)
- SpaceRef CRUD with allowlist/blocklist, permission ceiling enforcement
- Approval flow for nest requests with admin review
- Reverse lookup (nested-in) so owners see where their space appears
- Source space admins can always revoke (sovereignty guarantee)
- cascadePermissions() for multi-depth permission intersection
- Client-side types for nested space rendering
- Full spec at docs/SPACE-ARCHITECTURE.md
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
