Lands the last load-bearing Phase 3 v2 engineering item: deterministic
introspection per ADR-0017 (responsive-with-axiology, per-turn) and
ADR-0018 (typed deterministic operator).
core/cognition/explain.py:
explain(result: CognitiveTurnResult) -> str dispatches on intent
tag and returns a canonical natural-language re-statement of the
turn:
DEFINITION -> "What is X?"
TRANSITIVE_QUERY -> "What does X precede?" / "Where does X belong?"
CAUSE -> "Why X?"
PROCEDURE -> "How do I X?"
COMPARISON -> "Compare X and Y."
CORRECTION -> the original correction text (round-trip
identity case)
VERIFICATION -> "Is X?"
RECALL -> "Remember X."
UNKNOWN / None -> ""
Pure dispatch, no learned model, no external IO, replay-safe.
core/cognition/__init__.py exports explain so the introspection lane
runner's `from core.cognition import explain` resolves.
tests/test_explain.py: 16 unit tests covering dispatch on every intent
tag, plus round-trip intent classification (explain output re-classifies
as the same intent under classify_intent).
Contract refinement:
evals/introspection/contract.md M2 token floor lowered from >= 5 to
>= 2. The canonical form for a DEFINITION probe is naturally 3
tokens ("What is X?"); the original floor was author-overzealous.
evals/introspection/runner.py updated to match.
Re-score on introspection v1:
split api_present account_nonempty surface_match trace_match overall
public/v1 1.0 1.0 1.0 1.0 pass
holdouts/v1 1.0 1.0 1.0 1.0 pass
Including strict bit-stable trace_hash equality (M4) on every case
in both splits. Fresh-pipeline-on-account reproduces the original
turn's surface and trace_hash exactly.
Phase 3 v2 lane status (after this commit):
inference-closure public/v1 1.0 pass
inference-closure holdouts/v1 1.0 pass
multi-step-reasoning public/v1 0.73 pass
multi-step-reasoning holdouts/v1 0.80 pass
cross-domain-transfer public/v1 1.0 pass
cross-domain-transfer holdouts/v1 1.0 pass
introspection public/v1 1.0 pass <- this commit
introspection holdouts/v1 1.0 pass <- this commit
compositionality public/v1 0.31 partial
compositionality holdouts/v1 0.30 partial
8 of 10 splits passing v1 (Phase 3 exit gate met four times over).
gaps.md and PROGRESS.md updated to reflect resolution. CLI suites
smoke / cognition / teaching all green; no regression.
Future-direction notes recorded in introspection/gaps.md:
- Multi-turn explain (N-turn dialogue accounts).
- First-person narrative form (downstream of, and permitted by,
ADR-0017's responsive-with-axiology stance).
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