Judge reason

Saved transcript tool outputs (not prose) prove real execution of the keyless task. Install: './venv/bin/pip install pydantic' returned 'Successfully installed annotated-types-0.8.0 pydantic-2.13.5 pydantic-core-2.46.5 typing-extensions-4.16.0 typing-inspection-0.4.4'. quickstart.py (echoed back by cat) defines User(id:int, name='John Doe', signup_ts: datetime|None) and runs good/bad input. './venv/bin/python quickstart.py' printed EXIT=0 with: "{'id': 123, 'name': 'John Doe', 'signup_ts': datetime.datetime(2019, 6, 1, 12, 22)}", "123 <class 'int'>", and the caught ValidationError list "[{'type': 'int_parsing', 'loc': ('id',), ... 'input': 'not-an-int'}]" plus the formatted '1 validation error for User / id ... [type=int_parsing]'. That matches every success criterion (int coercion, name default, datetime parse of 2019-06-01 12:22:00, int_parsing error on field 'id', no uncaught exception). Note: the /workspace/home snapshot is truncated (only a partial venv; quickstart.py, evidence.txt, result.json and benchmark-first-success.json are absent even though the agent's 'ls -1 /tmp/benchmark-home' tool result lists all of them), so the verdict rests on the saved command outputs in the transcript.

Attempt record

1. —First success verified