Why: Concurrent password changes, recovery key reissue, and session admission could accept retired credentials or omit rejected audits.
Evidence: Local Go vet and full tests passed; real PostgreSQL store suite, deterministic interleavings, and two-process contention passed with SELF receipts.
Impact: Account writes and session admission serialize per owner; stale sessions fail closed; checked rejections carry an audit row.
Refs: Agent-System-Dev #486; Agent-System-Backend #185; merge queue Issue #518
Why: The login recovery contract leftovers and KTD12/KTD14 require:
concurrent same-name account creation must not overwrite the winner,
first-admin bootstrap must serialize across processes, the redeem
endpoint backoff must be shared across instances, revoked API keys
must close established SSE streams, and CLI credentials need an
env-DSN path plus a non-interactive 0600 file delivery mode.
Evidence: go test ./... green; new tests cover 16-way concurrent
create (1 win/15 conflict, winner credentials intact), 8-way
concurrent bootstrap (single admin, refuse takeover after), redeem
guard shared across two store handles on one DB, SSE stream closed
after key revocation within the recheck window, and HTTP 429 after
the failure cap (SELF worktree run; CI is the GATE, PG via test-pg).
Impact: Migration v29 (redeem_attempts); CreateAccount becomes a
single-row INSERT with unique-violation conflict; BootstrapFirstAdmin
advisory-locks (PG) / rechecks (SQLite) and commits admin+key+audit in
one transaction; SSE revalidation covers API-key streams; redeem
backoff moves to the shared DB; CLI gains AGENT_SYSTEM_DSN fallback
and --out file delivery for create/reset-password/issue-login-key/
bootstrap-admin.
Refs: docs/svc-deploy/2026-10-13-login-recovery-contract.md leftovers;
proposal r2 KTD12/KTD14/R5/R11.
Why: plan U3 remainder (R8/KTD13) - execution admission must be bounded and shared (leases in the database, parents yield while waiting so budgets cannot deadlock parent-child), and project authorization must distinguish read/edit/approve/execute/admin with default-deny for unconfigured actions.
Evidence: full suite green on SQLite and against real PostgreSQL 18.6 + Redis (isolated instance); new tests - admission_pg_test (enforcement, per-user, concurrent no-oversell), runmgr admission tests (saturated-budget sync spawn progresses, background children share the budget, bounded queue 429), server action-matrix tests (default deny, legacy adapter read-only, action-aware authoritative + fail-closed).
Impact: admission_leases (v21) with atomic lease accounting under an advisory lock; runtime.execBudgetGlobal/PerUser/execQueueMax settings (all zero = off, historical behavior preserved); conversation turns, background and sync subagents share the pool, parents yield around synchronous children and HITL waits; queue-full rejects 429 before writing; server gains ProjectAction matrix + SetProjectActionAuthorizer with legacy EXT-8 read fallback.
Refs: proposals/2026-10-11-collaboration-storage-and-distribution.md U3 R8/KTD13; docs/guides/team-storage.md section 9.
Details (original message):
Add the vector RAG pipeline: paragraph chunker, OpenAI-compatible embeddings and rerank clients, dual-tier vector store with cosine search, and RRF hybrid retrieval
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