Design Doc — Engineering Design Document Generator

Generate complete, publication-ready design documents with embedded Mermaid diagrams from a single prompt.

Philosophy

• One-shot output — Full document from single prompt
• Diagrams first-class — Every doc includes 2-5 Mermaid diagrams
• Opinionated defaults — Make reasonable choices, document in Decision Log

Workflow

1. Parse request — Extract what, why, who, constraints, scope
2. Clarify only if critical — ONE round of ≤4 questions if truly vague
3. Select diagrams — Use decision matrix below
4. Generate document — Use template, all sections substantive
5. Save — .output/design-doc-{topic}-{timestamp}.md