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Authoritative engineering contract for #29. Source: docs/handoff.md §Slice 3, §Fact pipeline 3–4, §Datalog unification; ADR-0002 §4.

Proposal

Deterministic rules decide everything that does not require an LLM: readiness, blockers, decomposition, missing predicates — with rule digests on every decision, rendered into the canonical comment at projection v2.

Specification Delta

• ADD structural fact lowering to event/subject/field/nests.
• ADD alias-preserving entity resolution; no embedding merges.
• ADD minimal refinement ruleset with typed predicate-miss routing.
• CHANGE canonical comment projection v1 → v2: real digests, canonical_comment/2 effect key.
• EXIT: fixture corpus refines offline, byte-stable goldens.

Design

handoff §Fact pipeline; placeholder replacement contract in ADR-0002 §4. Rules are reviewed files; the engine is Slice 2's substrate (#28).

Tasks

#7 · #9 · #8 · #10 · #11