451c4b1e17
proof_chain phase 2.1: the acyclicity guard at the shared binding-graph
construction boundary, before phase 2.2 wiring can build a cyclic-capable structure.
- generate/binding_graph/acyclicity.py: pure find_cycle(adjacency) detector
(deterministic three-colour DFS; isolated, no model import).
- model.py __post_init__: builds {lhs: deps} adjacency over equations and raises
BindingGraphError(circular_dependency ...) on a cycle. Runs on every binding
graph (math + future proof) — illegal states unrepresentable for all consumers.
- tests/test_binding_graph_acyclicity.py: 17 tests (pure checker + construction
enforcement); mutation-verified non-vacuous.
- ADR-0203: new ADDITIVE invariant referencing ADR-0132 (not an amendment —
preserves the why-added-later history).
Math-lane regression proof: the only producer (math adapter) is acyclic by
construction (fresh result symbol per op, deps point backward); full
binding-graph + admissibility surface 392 green; guard refuses no existing graph.
Honesty boundary (load-bearing): through phase 2.3, proof_chain is SOUND OVER
DECLARED ATOMS, not grounded in recognized input (grounding is phase 2.4).
full binding-graph/admissibility surface: 392 passed. smoke: 67 passed.
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| .. | ||
| adr | ||
| architecture | ||
| audit | ||
| brief | ||
| briefs | ||
| curriculum | ||
| decisions | ||
| evals | ||
| handoff | ||
| handoffs | ||
| implementation | ||
| plans | ||
| research | ||
| sessions | ||
| workbench | ||
| zig | ||
| admissibility-exemplars.md | ||
| audio_pipeline_overview.md | ||
| capability_roadmap.md | ||
| claims_ledger.md | ||
| ethics_packs.md | ||
| EVAL_AUDIT_2026-05-20.md | ||
| eval_methodology.md | ||
| formation_pipeline_plan.md | ||
| frontier_baselines.md | ||
| gaps.md | ||
| hitl-backpressure.md | ||
| holdout_recipients.txt | ||
| identity_packs.md | ||
| master-plan-post-substrate-audit.md | ||
| model_dependency_size_tally.md | ||
| pack_inventory_2026-05-21.md | ||
| position_paper.md | ||
| PROGRESS.md | ||
| recognizer-registry.md | ||
| refusal-taxonomy.md | ||
| reviewers.yaml | ||
| runtime_contracts.md | ||
| RUST.md | ||
| safety_packs.md | ||
| teaching_order.md | ||
| test-debt-quarantine.md | ||
| truth_seeking_schema.md | ||
| Whitepaper.md | ||
| Yellowpaper.md | ||