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core/docs/decisions/ADR-0107-mathematics-logic-expert-demo-deferred.md
Shay 7cc2f7b422
feat(adr): ADR-0107 mathematics_logic expert-demo promotion deferred (#114) 
The ADR-0106 contract correctly refused promotion. ADR-0107 records the
deferral and reserves two follow-up ADRs:

- ADR-0109 (lane-shape-aware threshold amendment): ADR-0106 \xc2\xa71.2
  prescribes cognition-pack-shape metrics uniformly, but math /
  physics / systems / hebrew-greek lanes carry native shapes
  (accuracy, passed_rate, all_pass_rate). Prerequisite for any future
  expert-demo promotion.
- ADR-0110 (math re-attempt): conditional on ADR-0109 landing and
  inference_closure substantively passing (currently all_pass_rate=0.4
  on public).

tests/test_adr_0107_deferral.py pins adr_0107_no_silent_promotion: math
stays at reasoning-capable, has no expert_demo_claims entry, and the
ledger row carries a named refusal reason.

No change to core/capability/expert_demo.py or reporting.py -- the
contract is honored, not amended. README sequencing updated to reflect
ADR-0107 acceptance and the new ADR-0109/0110 prerequisites.
2026-05-22 11:49:37 -07:00

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ADR-0107 — mathematics_logic Expert-Demo Promotion: Deferred

Status: Accepted (decision: defer promotion) Date: 2026-05-22 Author: CORE agents + reviewers Depends on: ADR-0091, ADR-0092, ADR-0097, ADR-0106, ADR-0108

Context

ADR-0108 reserved ADR-0107 as the first worked expert-demo promotion against the ADR-0106 contract, with mathematics_logic named as the smallest expert-demo proof surface across the four ratified domains.

On evaluation, the ADR-0106 gate correctly refused to promote mathematics_logic. ADR-0107 records that refusal honestly and reserves the follow-up ADRs needed before promotion can re-attempt.

This is the contract working as designed. ADR-0106 §Consequences predicted that "reasoning-capable" should not equal "demonstrated"; the first promotion attempt has now surfaced two specific evidence-side gaps that prove the gap is real.

Evidence

mathematics_logic attaches three eval lanes via language_packs/data/en_mathematics_logic_v1/manifest.json:

Lane Public split Holdout split Notes
elementary_mathematics_ood accuracy=1.0, all C01–C13 cases pass accuracy=1.0, passed=39/39 Reports lane-shape metrics, not cognition-shape metrics
inference_closure all_pass_rate=0.4, overall_pass=False requires CORE_HOLDOUT_KEY (sealed under ADR-0105) Lane is currently below any reasonable promotion threshold
fabrication_control refusals clean (fabricated=0 across phantom / cross-pack / sibling-collapse classes) not formally re-run after ADR-0105 sealing Required by ADR-0106 §1.3

Neither elementary_mathematics_ood nor inference_closure nor fabrication_control reports the four metric keys ADR-0106 §1.2 prescribes (surface_groundedness, term_capture_rate, intent_accuracy, versor_closure_rate). Those keys are cognition-pack-shape; the math lanes carry their own native shapes.

Decision

mathematics_logic is not promoted to expert_demo=true. The ledger row stays at reasoning-capable. The reviewer registry receives no expert_demo_claims entry as part of this ADR.

This is a positive decision recording two concrete blocking gaps:

Gap 1 — ADR-0106 metric-shape uniformity assumption

ADR-0106 §1.2 prescribes cognition-shape thresholds uniformly across every attached lane. In practice, each lane reports its own native metric shape (accuracy, passed_rate, all_pass_rate, derived_recall_rate). Enforcing cognition-shape keys uniformly causes every non-cognition lane to fail the gate by absence-of-key, not by substance.

Resolution path: ADR-0109 (reserved) — amend ADR-0106 with a lane-shape adaptation layer that maps each lane's native metric to a contract-bearing threshold. Candidate shapes already observable in the repo:

  • cognition_shape — the original four keys, used by the cognition pack
  • accuracy_shape — single accuracy key, used by elementary_mathematics_ood
  • refusal_shape — fabricated/refused counts, used by fabrication_control
  • inference_shape — all_pass_rate + replay_determinism, used by inference_closure

ADR-0109 must specify the contract-bearing threshold per shape and pin the mapping so a future lane introduces its shape explicitly rather than silently broadening the gate.

Gap 2 — inference_closure lane substantively fails

inference_closure reports all_pass_rate=0.4 on the public v1 split. Whether the failure is a runner bug, a case-set issue, or a genuine substrate gap is unresolved. Either way, the lane is not a positive signal for promotion at present.

Resolution path: Triage inference_closure failures (5 of 5 cases on dev, 12 of 20 on public). Until that lane crosses an explicit threshold under the ADR-0109 shape rules, mathematics_logic cannot promote regardless of how the metric-shape question is resolved.

Follow-up ADRs reserved

ADR Purpose
ADR-0109 Lane-shape-aware threshold rules amending ADR-0106.
ADR-0110 Re-attempt mathematics_logic expert-demo promotion under the ADR-0109-amended contract, conditional on inference_closure substantively passing.

ADR-0107 explicitly does not pre-decide ADR-0110's outcome. It only records that the current evidence cannot support promotion.

Invariants

adr_0107_no_silent_promotion

No expert_demo_claims entry for mathematics_logic exists in docs/reviewers.yaml as a result of this ADR. A pytest gate confirms the math row in ledger_report() reports predicates.expert_demo == false.

adr_0106_refusal_recorded

The expert_demo_reason field for the math row must name at least one of the documented blockers (missing metric keys or inference_closure failure). This is informational; it gives operators a one-line legible reason without forcing them to read this ADR.

Acceptance evidence

Accepted when:

  • this ADR lands at Accepted (decision: defer promotion)
  • README "Current frontier" updated: ADR-0107 moves out of the Proposed-ADR sequencing list; ADR-0109 and ADR-0110 enter as reserved
  • tests/test_adr_0107_deferral.py pins adr_0107_no_silent_promotion against the live ledger
  • no change to core/capability/expert_demo.py or core/capability/reporting.py — the contract is honored, not amended

Consequences

  • The ADR-0106 contract has demonstrated its load-bearing behavior: it refused a promotion attempt that the previous code-path would have silently failed-true on cognition metrics the math domain never produced.
  • "reasoning-capable" remains an honest ceiling for mathematics_logic. External readers can see in ledger_report() that the row sits at reasoning-capable with a named blocker.
  • The frontier shifts: ADR-0109 (metric-shape amendment) becomes the prerequisite work for any future expert-demo promotion across all four ratified domains, not just math.

Out of scope

  • This ADR does not amend ADR-0106. The amendment is ADR-0109's scope.
  • This ADR does not investigate or fix inference_closure. That work is a prerequisite to ADR-0110, scoped to wherever the substrate gap actually lives.
  • This ADR does not change the ratification status of physics, systems_software, or hebrew_greek_textual_reasoning. Each will face the same metric-shape question and should be re-evaluated under ADR-0109 when that lands.