Backend counterpart to the Python engine's semantic router.
- POST /api/decision/route: service-secret-guarded endpoint the Python
backend calls on regex-miss. Calls gpt-5-mini (ROUTER_LLM_MODEL),
validates the chosen id against the candidate set, and writes both a
UsageEvent (central cost ledger) and a routing-review record — including
timeouts, with timeoutMs + actual latencyMs — so the budget can be tuned
- LlmRoutingDecision model + GET /api/admin/llm-routing (paginated,
status-filtered, per-status counts)
- admin "LLM Routing" tab: transcript vs expected phrase, candidate chips
with the chosen one highlighted, latency/budget chip, model reason
- serviceAuth util (mirrors CRON_SECRET pattern)
- .env.example: ROUTER_LLM_MODEL, SERVICE_SECRET
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
