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hub/tasks/architecture/storage/resolve-org-dual-ownership.md
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---
id: resolve-org-dual-ownership
name: Resolve dual ownership model for organizations
status: completed
depends_on: [resolve-sessions-accountid-cascade]
scope: narrow
risk: high
impact: component
level: implementation
---
## Description
Two competing ownership concepts with no documented relationship:
1. `organizations.ownerId` — a single FK to one account (`identity.md:44`)
2. `organization_members.membershipLevel: "owner"` — can exist on multiple rows (`identity.md:58`)
Can `ownerId` point to an account with `membershipLevel: "member"` (not "owner")? Can an org have zero members with `membershipLevel: "owner"` but a non-null `ownerId`? An implementer cannot determine which field is authoritative for ownership queries.
The resolution of `sessions.accountId` cascade (C01) affects this because if account deletion is enabled (nullable FKs), the org ownership transfer workflow depends on knowing which field is authoritative.
## Acceptance Criteria
- [ ] `identity.md` documents the invariant relating `organizations.ownerId` and `organization_members.membershipLevel`
- [ ] One of the following invariants is chosen and documented:
- "`ownerId` is always a member with `membershipLevel: 'owner'` (enforced by app logic). If all owner-level members are removed, `ownerId` must be transferred first."
- "`ownerId` is the creator; `membershipLevel: 'owner'` is a separate authorization concept."
- [ ] The account deletion workflow interacts correctly with the chosen invariant (e.g., RESTRICT on ownerId means account deletion blocked if account owns an org)
- [ ] `table-reference.md` cascade rationale for `organizations.ownerId → accounts.id` (RESTRICT) is updated with the invariant reference
## References
- docs/reviews/storage-architecture-review-2026-04-21.md#C13
- docs/architecture/storage/identity.md:44
- docs/architecture/storage/identity.md:58
## Notes
> To be filled by implementation agent
## Summary
> To be filled on completion