Checklists

requirements.md

Specification Quality Checklist: Coord Reads Fail Closed

Purpose: Validate specification completeness and quality before proceeding to planning Created: 2026-09-24 Feature: spec.md

Content Quality

  • ✅ No implementation details in requirement/success rows (code locations appear only in Context as brownfield provenance)
  • ✅ Focused on user/operator value (no silent data loss; no permanent dead-end)
  • ✅ Written for stakeholders (purpose_tldr + Context lead with impact)
  • ✅ All mandatory sections completed

Requirement Completeness

  • ✅ No [NEEDS CLARIFICATION] markers remain (the one design fork resolved via DM-01M38VWD)
  • ✅ Requirements testable and unambiguous
  • ✅ Requirement types separated (FR / NFR / C)
  • ✅ IDs unique across FR/NFR/C
  • ✅ All rows have a Status
  • ✅ NFRs carry measurable thresholds (0 destructive rewrites, 0 regressions, 100% accept success)
  • ✅ Success criteria measurable + technology-agnostic (outcome-stated)
  • ✅ Acceptance scenarios defined (3 user stories)
  • ✅ Edge cases identified (non-UTF-8 byte, non-coord topologies, materialised husk, NONE)
  • ✅ Scope bounded (C-002 fences off #4979; C-001 fixes the operator-chosen locus)
  • ✅ Dependencies/assumptions identified (C-004 no deps; operator decision recorded)

Feature Readiness

  • ✅ All FRs have clear acceptance criteria
  • ✅ User scenarios cover primary flows (one per finding + the seam contract)
  • ✅ Feature meets measurable outcomes in Success Criteria
  • ✅ No implementation detail leaks into requirement/SC rows

Notes

  • Fail-closed locus resolved by operator Decision Moment DM-01M38VWD3KKSSTZNCK9V00N3TJ: seam-level (resolution.py raises), inherited by both surfaces + future readers.
  • Closes #4959 + #4966 (siblings under epic #5002); #4979 is a separate tracked mission. Provenance: scope pass on d6533ea419.