0bdb3a441c
ADR-0175 Phase 3 splits wrong=0-first: build the gate (3a) and PROVE invariant #2 before the bounded search (3b) that could exploit gaps. generate/derivation/: - model.py: Quantity / Step / GroundedDerivation. A derivation is a left-fold over text-sourced quantities; each Step carries its licensing cue (the lexeme the search claims licenses the op). - verify.py: self_verifies() — grounded operands ∧ grounded operation cues ∧ unit consistency ∧ no divide-by-zero. Grounding REUSES the canonical primitives from math_roundtrip (_tokens/_token_in/_value_grounds) so the gate cannot drift from the round-trip contract. select_self_verified() adds the uniqueness rule: unique self-verifying answer resolves; zero or disagreeing refuse (wrong=0). INVARIANT #2 proven (TestInvariant2_NoSpuriousSelfVerification): the gate refuses to self-verify a derivation that is not grounded+unit-consistent+unique even when its value coincides with gold — the 20/5==4 class: - invented operand not in text -> refused - operation cue not in text -> refused (division not licensed by any present cue) - value coincidence (20/5=4) with ungrounded op -> still refused - add across units (pounds + reps) -> refused - divide-by-zero -> refused Plus uniqueness: disagreeing grounded derivations -> refuse; agreeing -> resolve. Phase 3a is inert (nothing wires generate.derivation into serving). 3b is the bounded search that produces derivations for this gate + measures the flip-curve in the practice lane under perturbation. Verified: 16/16; ruff clean; smoke 67/67; no serving import.
27 lines
721 B
Python
27 lines
721 B
Python
"""ADR-0175 Phase 3 — grounded derivation search + self-verification gate.
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Phase 3a (this surface): the self-verification gate — grounded operands ∧
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grounded operation cues ∧ unit consistency ∧ uniqueness. The wrong=0-critical
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guard that keeps the (Phase 3b) bounded search honest.
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"""
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from __future__ import annotations
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from generate.derivation.model import GroundedDerivation, Quantity, Step, VALID_OPS
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from generate.derivation.verify import (
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Resolution,
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SelfVerification,
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select_self_verified,
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self_verifies,
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)
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__all__ = [
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"GroundedDerivation",
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"Quantity",
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"Resolution",
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"SelfVerification",
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"Step",
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"VALID_OPS",
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"select_self_verified",
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"self_verifies",
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]
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