# Evidence: Bootstrap .venv and verify a TPU runtime receipt

Copy this template into your own portfolio and fill it after running your modified exercise.

## Evidence required

Keep the JSON runtime receipt (observed_backend, device_count, pmap_sum_of_squares, receipt_sha256) and the 1-chip vs 4-chip vs 8-chip pmap reference values.

- Command: `python3 phases/19-tpu/02-bootstrap-venv-and-verify-tpu-runtime-receipt/code/main.py`
- Working directory: repository root
- Python / JAX / NumPy versions: 
- Hardware and device: 
- My prediction before running: 
- My change to the exercise: 
- Exit code and meaningful output: 
- Why the result supports or contradicts my prediction: 
- Checkpoint result: 
- Artifact link or saved filename: 
- Portfolio status: saved in local workspace