{
  "registry_version": "1.0.0",
  "release": "HBF Research Preview 1.0",
  "policy": "A tolerance is a test contract, not a statement of physical accuracy. Every result records the fixture, metric, threshold, source and domain.",
  "tolerances": [
    {
      "id": "FUS-REACTIVITY-CHECKPOINT-R1",
      "module": "fusionsim",
      "metric": "relative difference at declared source checkpoints",
      "threshold": 0.03,
      "units": "fraction",
      "domain": "only the temperatures and source version named by the fixture",
      "claim": "partial literature reproduction"
    },
    {
      "id": "FUS-QUADRATURE-REFINE-R1",
      "module": "fusionsim",
      "metric": "relative change under declared quadrature refinement",
      "threshold": 0.005,
      "units": "fraction",
      "domain": "bundled benchmark grid",
      "claim": "convergence demonstrated for declared cases"
    },
    {
      "id": "NUC-Q-LEDGER-R1",
      "module": "nuclear-data",
      "metric": "absolute difference between the pinned-mass Q-value and the generated product energy ledger",
      "threshold": 1e-9,
      "units": "MeV",
      "domain": "bundled deterministic channels with complete pinned mass records",
      "claim": "internal conservation and numerical-accounting check"
    },
    {
      "id": "MIR-ENERGY-LEDGER-R1",
      "module": "mirror-reactor",
      "metric": "absolute normalized energy-ledger residual",
      "threshold": 1e-9,
      "units": "fraction of input energy",
      "domain": "bundled deterministic fixtures",
      "claim": "internal numerical accounting check"
    },
    {
      "id": "TOR-INVARIANT-REFINE-R1",
      "module": "torus-orbit",
      "metric": "non-increasing declared orbit error under step refinement",
      "threshold": 0,
      "units": "monotonic property",
      "domain": "bundled analytic-field fixtures",
      "claim": "convergence demonstrated for declared cases"
    },
    {
      "id": "AT-SYNTHETIC-REGRESSION-R1",
      "module": "alphatrack",
      "metric": "exact deterministic match to frozen synthetic fixture labels",
      "threshold": 1,
      "units": "boolean pass",
      "domain": "bundled synthetic images only",
      "claim": "internal software regression; no real-data accuracy claim"
    },
    {
      "id": "DC-LEDGER-BOUND-R1",
      "module": "directconvert",
      "metric": "normalized output plus declared losses does not exceed normalized input beyond floating-point allowance",
      "threshold": 1e-9,
      "units": "fraction of input energy",
      "domain": "bundled L0/L1 fixtures",
      "claim": "internal property and accounting check"
    }
  ]
}