{
  "artifact": "Bell-state public playground reference slice",
  "chapter": "Public Playground MVP",
  "chapter_url": "https://www.steven-geller.com/playground/quantum/book/87-public-playground-mvp/",
  "date_modified": "2026-08-14",
  "dependencies": [],
  "expected_exit_code": 0,
  "expected_stdout": "PASS: 87 Bell MVP norm=1.0 mutant_odd=0.5 boundary_norm=2.0\n",
  "fixture_sha256": "78c13bf0f960e7d6c1e814eccc61777ff3997903f5dbb6d7a1645af1b49aab6e",
  "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": "The fixture preserves normalization and Bell parity; the page works by keyboard and without client-side math; sources, limitations, version, test command, and issue route are visible.",
  "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."
}