feat(mcp): 050 unified MCP interface — parity tools, durable gates, authoring E2E, assistant decommission
044 provider runtime completion (pre-staged workstream): capacity/operator
stores, provider ops/protocol/reconciler/dispatch revalidation, exploration
sandbox runtime, alembic 0014-0016, live canary evidence (browser provider
6/6 against the live stand).
050 Phases 0-2: RBAC FastMCP server with a 45-tool explicit catalog,
OAuth/DCR transport guards with bounded bodies, per-call provenance
(McpToolInvocationRecord), durable ActionApprovalGate + CAS decide +
leased/fenced poller, authoring workspace ops, bounded-response discipline,
hidden-vs-gated matrices.
Parity domains (T012-T014): gated git/deploy/migration/backup/llm tools with
reviewed dispatch adapters in explicit poll chains; Superset reads/writes with
a dedicated plugin:superset_sql risk class (terminal PROD denial via the
canonical execution-policy criterion, hardened danger-SQL guard covering
INTO/CALL/SET/REFRESH/file primitives/multi-statement); baseline 037 tools
over the shared REST-surface services.
Evidence (T016/T023/T028): REST-vs-MCP field parity on shared 037 fixtures;
vertical E2E from tools/list through registry revision activation with real
scenario:EDIT RBAC; sandbox-to-revision promotion E2E with unsafe-payload and
caller-digest rejection; dispatcher soak (three poll cycles, exactly-once).
Orthogonal QA+security audit hardening: enforced response_limit fail-closed
envelope, poisoned-exploration fail-closed (EXPLORATION_TARGET_UNRESOLVED),
sha256 exploration evidence digests, actor-UUID task ownership, is_active
guard on baseline consume, 038 resolver description=None selector fix.
Phase 3/4 decommission: HandoffSurface behind the MCP_DECOMMISSION flag,
then unconditional removal — agent/ service tree, chat components/models/
stores/types, gradio proxies (vite + nginx), agent service in run.sh,
docker-compose profiles, build.sh bundles; /agent renders the handoff only.
Docs: AGENTS.md/INSTALL.md two-service rewrite; 036-047 drift amendments
marked done; WORKSTATE checkpoints with all evidence.
Suites: backend 11199 passed / 240 skipped / 1 xpassed; frontend 3454 passed
(197 files), lint 0 errors, build OK; browser E2E login+handoff 6/6 twice on
the isolated compose stack (no 7860); ruff/compileall clean.
Misc: gitignore hardening (tmp/, tool model cache); E2E selector repairs
(nav strict-mode, invalid-credentials passthrough detail).
busya
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