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# Specification Quality Checklist: Lynx Block Diagram Widget

**Purpose**: Validate specification completeness and quality before proceeding to planning
**Created**: 2025-12-25
**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 Results

**Status**: ✅ PASSED

All checklist items have been validated:

1. **Content Quality**: Specification is written for controls engineers (stakeholders) without implementation details. Focuses on what the system does (drag-and-drop editing, validation, persistence) and why (enable visual design in Jupyter, prevent invalid systems).

2. **Requirement Completeness**: All 20 functional requirements are testable and unambiguous. Success criteria are measurable (5 minutes, <100ms, 50 blocks, zero crashes) and technology-agnostic. No [NEEDS CLARIFICATION] markers present.

3. **Feature Readiness**: 5 user stories with clear priorities (P1-P5), each independently testable. Edge cases identified covering error scenarios, performance limits, and data persistence.

4. **Scope Boundaries**: Clear "Out of Scope" section excludes export functionality, simulation, visualization, and other features to maintain MVP focus.

## Notes

- ✅ Specification completed and validated
- ✅ Planning phase completed - see [plan.md](../plan.md)
- ✅ Implementation strategy defined with clear phase breakdown:
  - Walking Skeleton: Gain + I/O blocks (prove architecture)
  - P1: All 5 blocks + basic parameters + connection validation + basic save/load
  - P2: Expression evaluation for matrices (hybrid storage)
  - P3: Algebraic loop detection + system completeness
  - P4: Save/load edge cases + schema versioning
  - P5: Undo/redo + keyboard shortcuts + grid snapping
- No clarifications needed - all design decisions incorporated
- User stories prioritized to enable incremental delivery
- Task sequence is now clearly derivable from implementation strategy
