"""The derivation layer: evidence -> claims, with provenance,
calibrated confidence, mechanical cascade invalidation, and signed
explanation records.

Public surface:

* :mod:`mnema.derive.model` — claim nodes, statuses, predicates.
* :mod:`mnema.derive.confidence` — the calibrated confidence pipeline.
* :mod:`mnema.derive.graph` — the derivation graph and cascade logic.
* :mod:`mnema.derive.engine` — the orchestrating engine (run derivers
  to fixpoint, apply refutations/corrections, emit invalidations and
  re-derivations, persist explanation records).
* :mod:`mnema.derive.derivers` — the built-in rule/heuristic derivers
  (routines, places, relationships, preferences).
"""

from mnema.derive.confidence import (
    PPM,
    CalibrationTable,
    combine_supports,
    confidence_pipeline,
    from_ppm,
    saturating_support,
    temporal_decay,
    to_ppm,
)
from mnema.derive.graph import DerivationGraph, GraphError
from mnema.derive.model import ClaimNode, ClaimStatus, Predicates

__all__ = [
    "PPM",
    "CalibrationTable",
    "combine_supports",
    "confidence_pipeline",
    "from_ppm",
    "saturating_support",
    "temporal_decay",
    "to_ppm",
    "DerivationGraph",
    "GraphError",
    "ClaimNode",
    "ClaimStatus",
    "Predicates",
]