ADR-0097 — Mathematics-Logic Reasoning-Capable Ratification

Status: Accepted Date: 2026-05-21 Accepted: 2026-05-22 Author: CORE agents + reviewers Depends on: ADR-0091, ADR-0092, ADR-0093, ADR-0096

Acceptance evidence

Accepted after mathematics_logic became a mechanically ratified reasoning-capable ledger row:

language_packs/data/en_mathematics_logic_v1/manifest.json carries Domain Pack Contract v1 fields.
teaching/domain_chains/mathematics_logic_chains_v1.jsonl supplies reviewed active chains.
core/capability/domain_contract_predicates.py verifies all nine ADR-0091 predicates.
tests/test_adr_0097_mathematics_logic_ratification.py pins:
- all nine predicates pass for en_mathematics_logic_v1
- the ledger row status is reasoning-capable
- provenance points at adr-0097:reviewed:*
- expert_demo remains false
- declared lanes include elementary_mathematics_ood, inference_closure, and fabrication_control

Context

The mathematics/logic substrate is structurally complete:

language_packs/data/en_mathematics_logic_v1/ ships with manifest, lexicon, glosses.
teaching/domain_chains/mathematics_logic_chains_v1.jsonl exists.
evals/elementary_mathematics_ood/ exists.
docs/gaps.md marks mathematics-logic gaps closed.

This ADR is the first concrete domain claim under the Domain Pack Contract. It turns existing artifacts into a ratified reasoning-capable ledger row.

Decision

Ratify en_mathematics_logic_v1 as reasoning-capable under ADR-0091 by emitting the contract fields into its manifest and passing domain-contract validation.

Manifest additions

{
  "domain_contract_version": 1,
  "domain_id": "mathematics_logic",
  "axioms": null,
  "rules": null,
  "teaching_chains": ["mathematics_logic_chains_v1"],
  "eval_lanes": [
    {"lane": "elementary_mathematics_ood", "version": "v1", "splits": ["dev", "public", "holdout"]},
    {"lane": "inference_closure", "version": "v1", "splits": ["dev", "public", "holdout"]},
    {"lane": "fabrication_control", "version": "v1", "splits": ["dev", "public", "holdout"]}
  ],
  "reviewers": ["shay-j"],
  "known_gaps": [],
  "provenance": "adr-0097:reviewed:2026-05-21"
}

axioms and rules stay null at v1. The pack proves reasoning through chain composition, not through declarative axioms. A future ADR may add explicit axioms; this one does not.

Required evidence

mathematics_logic_chains_v1.jsonl contains ≥ 8 reviewed chains per claimed operator family.
≥ 3 intent shapes are present.
Three-split eval lane references exist for positive coverage, composition, and negative control.

What this ADR does not do

Does not introduce new lemmas, chains, or evals.
Does not promote to expert-demo.
Does not modify runtime mount behavior.

Invariant

mathematics_logic_reasoning_capable_ledger_row — running core capability ledger emits a row for domain_id: mathematics_logic with status: reasoning-capable, provenance pointing at this ADR, and expert_demo: False until a future ADR attaches audit-tour-equivalent reports.

Lane

Existing lanes carry the evidence:

elementary_mathematics_ood/ — positive coverage
inference_closure/ — composition
fabrication_control/ — negative control
evals/domain_contract_validation/ — predicate validation

Trust Boundary

Manifest edit is a reviewed proposal. Checksum refresh follows pack discipline. No runtime mount path changes. No new filesystem writes outside the manifest and its checksum companion.

Consequences

First reasoning-capable row in the capability ledger backed by an ADR-0091-validated pack.
Sibling ratifications become mechanical follow-ups using the same template.
The public showcase demo (ADR-0099) gains a real domain to draw Scene 4 from.

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