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closes #4377) PR #4250's review flagged the agent-ownership JOIN as a drift surface — duplicated inline in two places with subtly different semantics: - registry-api.ts:4825 `resolveAgentOwnerOrg(userId, agentUrl)` — "any org the user is a member of that owns the agent" - member-tools.ts:3588 (inline) — "the resolved member-context org IS the owning org" (tighter predicate that adds the org_id constraint) Both queries join `member_profiles.agents` against `organization_ memberships` — same canonical relation, different selectivity. This PR extracts both to `server/src/services/agent-ownership.ts`: - `findOwnerOrgForUser(userId, agentUrl): Promise<string | null>` — registry-api.ts's "discover ownership" use case - `isOrgOwnerOfAgent(orgId, userId, agentUrl): Promise<boolean>` — member-tools.ts's "confirm specific org" use case Both call sites updated to use the helpers. `resolveAgentOwnerOrg` is retained as a closure-scoped alias inside the registry-api factory so existing call sites don't need to thread the import. Note on active-membership filtering: `organization_memberships` has no status column in this schema — removed members get their row deleted, not status-flipped. Row existence is the membership signal. Documented in the helper file's module doc. Tests (7 passing): - findOwnerOrgForUser returns org_id, null on no match, null on throw - isOrgOwnerOfAgent returns true/false correctly - semantic distinction pinned: findOwnerOrgForUser uses 2 params (no org filter); isOrgOwnerOfAgent uses 3 params (org_id constraint) Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Summary
Closes #4377. Extracts the agent-ownership JOIN predicate into `server/src/services/agent-ownership.ts` so the two distinct semantic uses share one source.
The drift surface
PR #4250's review flagged two inline copies of the same JOIN with subtly different semantics:
Both query `member_profiles.agents @> [...] JOIN organization_memberships` but with different selectivity. Three call sites adding more inline copies is when rot sets in.
What changed
Note on active-membership filtering
`organization_memberships` has no status column in this schema — removed members get their row deleted, not status-flipped. Row existence is the membership signal. Documented in the new module's doc comment so future readers don't add a redundant `AND status = 'active'` filter.
Test plan
🤖 Generated with Claude Code