Verify Version

Run a server-side verification pass on a draft version.

Validates the recipe and reviews the latest committed changes; the recorded verdict is what publishing reads. By default the pass is report-only: checks failures and review comments are recorded for the caller to address (read them from GET /api/v1/agents/{agent_id}/versions/{version}/review-threads and the round's build outcome), and the platform never edits the branch. With fix: true the platform's builder addresses its own review feedback autonomously — the pre-existing behaviour. With publish: true the version is published automatically when verification passes. reviewer_model picks the reviewer for this pass (default claude-opus-5; claude-sonnet-5 is the cheaper read). Billed like a build turn.

Returns 409 when the version is not a draft, or when a build or verification is already running for it.

curl -X POST "https://api.levainlabs.com/api/v1/agents/string/versions/0/verify" \  -H "Content-Type: application/json" \  -d '{}'

{
  "run_id": "string",
  "session_id": "string"
}

{
  "detail": [
    {
      "loc": [
        "string"
      ],
      "msg": "string",
      "type": "string",
      "input": null,
      "ctx": {}
    }
  ]
}