The API exposes GET /metrics for concurrency metrics including active_executions, max_concurrent, and available_slots so that clients and operators can inspect execution capacity and usage.

### API

— PYRANA_PLATFORM_ARCHITECTURE_REFERENCE.md

- GET /metrics — Concurrency metrics (active_executions, max_concurrent, available_slots)

— PYRANA_PLATFORM_ARCHITECTURE_REFERENCE.md

GET /metrics

— PYRANA_PLATFORM_ARCHITECTURE_REFERENCE.md