{
  "artifact": "Three-qubit line-constrained Bell lab",
  "chapter": "Hardware-Constrained Lab",
  "chapter_url": "https://www.steven-geller.com/playground/quantum/book/84-hardware-constrained-lab/",
  "date_modified": "2026-08-14",
  "dependencies": [],
  "expected_exit_code": 0,
  "expected_stdout": "PASS: 84 lab notebook gates=4 parity=0.96 claim=simulation-only invalid=['route_schema'] strict=acceptance-fail\n",
  "fixture_sha256": "228ec8f4e06ec85425337a6fad9a0d6f311de2244728173bfe85a5c8f9c7ffcd",
  "manifest_test_command": "python3 tools/validate_briefs.py --briefs data/editorial_briefs_64_87.json --from 64 --through 87 --check-rewritten-sources --execute-artifacts",
  "pass_condition": "Routing endpoints are correct, inserted SWAP/CNOT cost is counted, ideal Bell probabilities pass, and hardware claims remain pending without a calibration-stamped run.",
  "python_requires": ">=3.11",
  "run_command": "python3 fixture.py",
  "schema_version": "1.1.0",
  "test_method": "Run the isolated fixture; require exit code 0 and exact stdout."
}