POST/GET/DELETE /api/v1/mcp with API Key auth; tools are the capabilities
visible to the key's scope (download__submit naming), every call goes through
registry.invoke (authorize, audit, idempotency key, ledger) with source=mcp.
Resources: settings summary, pending decisions, subscriptions overview;
prompts: triage_pending, acquire_title, diagnose_task. Sessions bound to the
API key, idle reaping, per-key rate limits, enable switch and key allowlist.
Also GET /capabilities/stats (from audit_event) and /capabilities/tools.
Tests connect with the official SDK client over Streamable HTTP.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
