chore(routing): pre-merge cleanup — Plan 7 reminders, code_review→review, operator note

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

README.md

@@ -122,6 +122,8 @@ The supervisor probes connectivity at call time:
 | `HYPERGUILD_ROUTE_LOCAL_CEIL` | `0.70` | Below pass rate, route to Claude. Between CEIL and FLOOR is the sample band. |
 | `HYPERGUILD_PASS_RATE_TTL_SECONDS` | `60` | Per-skill pass-rate cache TTL |
 
+> **Operator note:** LiteLLM at `LITELLM_BASE_URL` must register both `HYPERGUILD_LOCAL_MODEL` and `HYPERGUILD_CLAUDE_MODEL` for routing to do useful work. If a model is missing, LiteLLM returns 4xx, the routing pod's local route fails, the fail-open retry on Claude likely also fails (since both are missing), and the only signal is `final_status: "fail"` on `_routing` entries in the brain.
+
 ## Phase 2 (planned)
 
 - `review` skill — structured code review with iron law enforcement