ADR-0101 — Systems-Software 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, ADR-0097

Acceptance evidence

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

language_packs/data/en_systems_software_v1/manifest.json carries Domain Pack Contract v1 fields.
teaching/domain_chains/systems_software_chains_v1.jsonl supplies reviewed active chains.
tests/test_adr_0100_0102_sibling_ratifications.py pins:
- all nine predicates pass for en_systems_software_v1
- the ledger row status is reasoning-capable
- provenance points at adr-0101:reviewed:*
- expert_demo remains false
- claimed operators transitive and causal meet chain coverage
- declared lanes include symbolic_logic, inference_closure, and fabrication_control

Context

The systems_software substrate is structurally complete:

language_packs/data/en_systems_software_v1/ ships with manifest, lexicon, glosses.
teaching/domain_chains/systems_software_chains_v1.jsonl exists.
evals/symbolic_logic/ exists with dev/public/holdout coverage as the closest in-tree lane for systems/software reasoning at v1.
docs/gaps.md marks systems_software gaps closed.
Chain coverage and intent-shape coverage satisfy ADR-0091 predicates.

This ADR applies the ADR-0097 ratification template to the systems/software domain.

Decision

Ratify en_systems_software_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": "systems_software",
  "axioms": null,
  "rules": null,
  "teaching_chains": ["systems_software_chains_v1"],
  "eval_lanes": [
    {"lane": "symbolic_logic", "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-0101:reviewed:2026-05-21"
}

Claimed operator families: transitive, causal. axioms and rules stay null at v1 — systems-software reasoning is demonstrated through reviewed causal/transitive chain composition over invariants, boundaries, and dependencies.

Eval lane choice — `symbolic_logic`

Systems-software lacks a dedicated v1 evaluation lane. symbolic_logic is the closest in-tree fit: it pins reasoning over typed relations that the systems_software chain corpus exercises. A future ADR may introduce a systems_software_design_ood lane and supersede this declaration.

Invariant

systems_software_reasoning_capable_ledger_row — core capability ledger emits a row for domain_id: systems_software 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:

symbolic_logic/ — reasoning over typed relations
inference_closure/ — composition
fabrication_control/ — negative control
evals/domain_contract_validation/ — predicate validation

Consequences

Third ratified reasoning-capable domain.
Establishes systems/software as a ledger-ratified domain while preserving the known v1 eval-lane limitation.
Provides another domain source for later evidence composition and showcase scenes.

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