# Specification Quality Checklist: Diagram Label Indexing

**Purpose**: Validate specification completeness and quality before proceeding to planning
**Created**: 2026-01-24
**Feature**: [spec.md](../spec.md)

## Content Quality

- [x] No implementation details (languages, frameworks, APIs)
- [x] Focused on user value and business needs
- [x] Written for non-technical stakeholders
- [x] All mandatory sections completed

## Requirement Completeness

- [x] No [NEEDS CLARIFICATION] markers remain
- [x] Requirements are testable and unambiguous
- [x] Success criteria are measurable
- [x] Success criteria are technology-agnostic (no implementation details)
- [x] All acceptance scenarios are defined
- [x] Edge cases are identified
- [x] Scope is clearly bounded
- [x] Dependencies and assumptions identified

## Feature Readiness

- [x] All functional requirements have clear acceptance criteria
- [x] User scenarios cover primary flows
- [x] Feature meets measurable outcomes defined in Success Criteria
- [x] No implementation details leak into specification

## Validation Notes

**Content Quality Review**:
- ✅ Specification uses business language (engineers, diagrams, blocks, labels)
- ✅ No mention of Python, `__getitem__` implementation, or specific data structures
- ✅ Focus on user value: "makes code more self-documenting and easier to understand"
- ✅ All mandatory sections present: User Scenarios, Requirements, Success Criteria

**Requirement Completeness Review**:
- ✅ No [NEEDS CLARIFICATION] markers - all requirements are concrete
- ✅ All FR items are testable (e.g., FR-001 can be tested by attempting bracket notation)
- ✅ Success criteria are measurable (e.g., SC-001: "under 5 lines of code", SC-004: "O(1)")
- ✅ Success criteria avoid implementation details (SC-004 says "assuming internal dictionary" but focuses on user-facing performance)
- ✅ Acceptance scenarios use Given/When/Then format with concrete examples
- ✅ Edge cases identified: empty labels, empty diagrams, special characters, deleted blocks
- ✅ Scope is bounded: label-based indexing only, not searching or filtering
- ✅ Dependencies implicit (requires existing Diagram and Block classes)

**Feature Readiness Review**:
- ✅ Each FR has corresponding acceptance scenarios in user stories
- ✅ User Story 1 (P1) covers basic access, User Story 2 (P2) covers duplicate detection
- ✅ Success criteria align with user stories (SC-001 for basic access, SC-002 for error handling)
- ✅ No implementation leakage detected

**Overall**: Specification is complete and ready for planning phase.
