Why: Account disable could be followed by late Backend business writes, API key creation could implicitly create users, account bootstrap locks could invert, and directory cursors were process-local or leaked out-of-scope changes.
Evidence: Local go test ./... and isolated PostgreSQL package suites passed on the staged candidate; exact committed-head SELF replay and stage 6 human review remain pending.
Impact: Adds final account transactions and external-effect checks across HTTP, Host, Bus and run manager; tightens API key issuance and persists versioned cursor signing. Delegated RDM rename still needs the separately proposed real-operator contract, so A1 and stage 6 are not complete.
Refs: Documents U3 r1, approved A1-A4 amendment fb3a821, pending delegated-projection amendment 5783940, Dev feature/iam-u3-account-directory-recovery.
Why: A member's agent cannot see published project knowledge inside a run
(runCtx.Retrieve and hostcaps.search are owner-only), and members can
neither see shared projects nor open conversations in them - both are P0
prerequisites for RDM G1 (EXT-13/EXT-15, proposal
2026-10-09-ext-g1-b1-b3-exec-backend).
Evidence: Red tests first - TestRunContextRetrieveShared (undefined
SetSharedKnowledgeAllow), TestInprocHostKnowledgeSearchShared (0 shared
hits), TestSharedProjectListAndConversation (empty list) all failed before
and pass after; go test ./... 32/32 packages ok.
Impact: runmgr gains SetSharedKnowledgeAllow and routes Retrieve through
RetrieveShared when the predicate is registered (nil = unchanged); hostcaps
search consults the same EXT-8 slot; GET /api/projects appends
adapter-authorized shared projects (projectView with shared flag, deduped);
POST /api/projects/{id}/conversations falls back to
CreateConversationInProject when the own-project path misses and the
adapter authorizes; store gains ListAllProjects (candidates only, callers
must filter through the adapter) and CreateConversationInProject.
Revocation takes effect immediately on both paths; absence of an adapter
is byte-for-byte the previous behavior. No pkg/extension surface change.
Refs: docs/proposals/2026-10-09-ext-g1-b1-b3-exec-backend.md (EXT-13, EXT-15)
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