---
type: Added
pr: 584
---
spec-phase: spec-completeness edge-probe — a taxonomy-driven Step 5.5 that walks each SPEC requirement against a closed 8-category edge taxonomy (boundary, adjacency, empty/degenerate, encoding, ordering, precision, idempotency, concurrency), proposes concrete candidate edges, and resolves each to covered/dismissed/backstop/unresolved. covered edges add acceptance criteria the planner lifts into must_haves.truths; a soft gate flags unresolved edges. Additive and optional: existing SPECs without an Edge Coverage section remain valid.