{
  "artifact": "Quantum stack dependency graph",
  "chapter": "The Quantum Company Landscape",
  "chapter_url": "https://www.steven-geller.com/playground/quantum/book/73-quantum-company-landscape/",
  "date_modified": "2026-08-14",
  "dependencies": [],
  "expected_exit_code": 0,
  "expected_stdout": "PASS: 73 stack map bottlenecks=['backend-access', 'control-supplier'] invalid=['application-a:buyer'] threshold3=diversified\n",
  "fixture_sha256": "0386c4e99975cc4c1489ea5651bc84a1cc3c74086b3b5231fe5d576bc13596d8",
  "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": "Every company category has a buyer and upstream dependency; the analyser reports shared critical dependencies and forbids cross-category score ranking.",
  "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."
}