{
  "id": "api-endpoint:agent-mux-gateway-post-session-messages",
  "_kind": "APIEndpoint",
  "_file": "extensions/api-endpoints/agent-mux-gateway-endpoints.yaml",
  "_cluster": "extensions",
  "attributes": {
    "displayName": "POST /api/v1/sessions/:sessionId/messages",
    "method": "POST",
    "path": "/api/v1/sessions/:sessionId/messages",
    "responseShape": "{ run: RunRecord, session: SessionSummary } | { error: 'not_found' }",
    "authRequired": true,
    "description": "Send a new prompt into an existing session (optionally with attachments, agent override, model, approvalMode). Source: packages/agent-mux/gateway/src/server.ts:444-472."
  },
  "outgoingEdges": [
    {
      "from": "api-endpoint:agent-mux-gateway-post-session-messages",
      "to": "package:a5c-ai-agent-mux-gateway",
      "kind": "exposed_by",
      "attributes": {}
    }
  ],
  "incomingEdges": [
    {
      "from": "package:a5c-ai-agent-mux-gateway",
      "to": "api-endpoint:agent-mux-gateway-post-session-messages",
      "kind": "exposes_endpoint",
      "attributes": {}
    }
  ]
}