Route Mapping
| Legacy | V4 | Notes |
|---|---|---|
POST /v1/headless/runs | POST /v4/execute | Ephemeral one-liner mode. |
| session-like client state | POST /v4/sessions.start | Backend-persisted defaults for policy/route/risk. |
| run invoke | POST /v4/sessions/{sessionId}/executions.execute | Inherits session defaults when omitted. |