# Specification Quality Checklist: Spec 400 - Product Contract & Spec Completeness Audit

**Purpose**: Validate specification completeness and quality before implementation preparation is handed off.
**Created**: 2026-06-22
**Feature**: `specs/400-product-contract-spec-completeness-audit/spec.md`

## Content Quality

- [x] No application implementation details are prescribed beyond read-only inspection targets.
- [x] Focused on product value, operator trust, and customer-ready productization risk.
- [x] Written as an audit/promotion gate that product and engineering reviewers can evaluate.
- [x] Mandatory Spec Kit sections are completed or explicitly marked N/A with rationale.

## Requirement Completeness

- [x] No unresolved clarification markers remain.
- [x] Requirements are testable and unambiguous for a read-only audit.
- [x] Success criteria are measurable.
- [x] Success criteria are technology-agnostic except for repo-path evidence references.
- [x] Acceptance scenarios are defined.
- [x] Edge cases are identified.
- [x] Scope is clearly bounded to audit/reporting and excludes implementation.
- [x] Dependencies and assumptions are identified.

## Feature Readiness

- [x] Functional requirements map to the final audit report structure.
- [x] User scenarios cover gate result, surface matrix, decision debt, hallucination risk, and follow-up grouping.
- [x] The feature meets measurable outcomes defined in Success Criteria.
- [x] No runtime implementation is required to execute the audit.

## Constitution And Product Surface Readiness

- [x] Spec Candidate Check is completed with approval class, score, and decision.
- [x] Completed-spec guardrail is explicit.
- [x] No UI surface impact is checked with a clear rationale.
- [x] Product Surface Contract is applied as an audit standard, not as runtime change.
- [x] Browser verification is `N/A - no rendered UI surface changed` for preparation.
- [x] Human Product Sanity is scoped to final-report sanity, not rendered UI.
- [x] Proportionality review states report-only outputs and no runtime framework.
- [x] Test governance states no tests, lanes, fixtures, or browser families are added.

## Notes

Preparation review result: pass. The package is ready for a separate read-only audit execution, provided the audit agent preserves the no-implementation boundary and records dirty state before/after.