Versioned additive-optional migration (L10 scoping step-2 ruling): a checkpoint
schema bump is a recorded lineage transition, not death-and-rebirth.
- engine_state.load_manifest() now REFUSES (IncompatibleEngineStateError) a
checkpoint whose schema_version > this build's _SCHEMA_VERSION, and tolerates
<= current (older/equal read any missing newer fields via additive-optional
defaults). Never silently mis-loads newer state.
- chat.runtime._load_engine_state() loads the manifest FIRST so the version
refusal gates before any recognizers/candidates are read.
- DerivedRecognizer.from_json documents the additive-optional convention
(new fields .get-defaulted + omitted-when-default), mirroring DiscoveryCandidate.
Tests (TDD): refuses newer schema_version; tolerates older. Prerequisite for the
L10 continuity spike's P2 byte-identity gate (it may now assume a fixed schema
within a run, with version bumps handled explicitly).
* feat(epistemic): populate normative_detail on TurnEvent and ChatResponse
Adds normative_detail_from_verdicts() to core.epistemic_state and wires
it into both the stub and main ChatResponse/TurnEvent construction sites.
The field carries a sorted comma-separated list of violated boundary or
commitment IDs when normative clearance is VIOLATED or SUPPRESSED; empty
string otherwise.
* docs(ADR-0142): ratify epistemic state taxonomy — 14-state vocabulary + normative clearance axis
Formalises the six-subsystem Framing 1 audit findings into a first-class
decision. Accepts the 14-state taxonomy and companion 4-value normative
clearance axis. Documents Phase 3 deliverables already landed and defers
structured provenance + cross-subsystem transition machinery to ADR-0144.
* feat(recognition): output contract + ADR-0143
Adds recognition/outcome.py: RecognitionOutcome, FeatureBundle,
BoundFeature, EvidenceSpan, NegativeEvidence, the three typed refusal
classes (ShapeRefusal, FeatureEvidenceRefusal, FeatureConsistencyRefusal),
and RecognitionProvenance. Frozen dataclasses, JSON-serializable,
byte-deterministic invariants enforced in __post_init__.
ADR-0143 commits to Mechanism D (multi-resolution anti-unification over
token sequences) and defines the two-phase acceptance test.
* feat(recognition): derive phase1 anti-unifier
