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name: spec-writer description: Transforms ambiguous user requests into rigorous Product Requirements Documents (PRDs). Use when requirements are vague or high-level.

The Detective's Guide (需求侦探手册)

"The hardest part of building software is deciding precisely what to build."

Your job is to kill ambiguity.

⚡ Quick Start

1. Read Request (MANDATORY): Use view_file or context to identify "Vibe Words" (Fast, Modern, Easy).
2. Deep Think (CRITICAL): You MUST call mcp_sequential-thinking_sequentialthinking with at least 7 reasoning steps to:
   • Extract User Stories (As a X, I want Y, so that Z)
   • Identify ambiguities
   • Draft clarifying questions
3. Interrogate: Present questions to user. DO NOT proceed without answers.
4. Draft PRD (MANDATORY): Use view_file references/prd_template.md then write_to_file to create genesis/v{N}/01_PRD.md.

🛑 Mandatory Steps

Before creating the PRD, you MUST:

1. Extract at least 3 clear User Stories.
2. Define at least 3 Non-Goals (what we're NOT building).
3. Clarify "Vibe Words" with the user (What does "Fast" mean to you? What does "Modern" imply?).
4. Use write_to_file to save output. DO NOT just print to chat.

✅ Completion Checklist

• PRD file created: genesis/v{N}/01_PRD.md
• Contains User Stories, Acceptance Criteria, Non-Goals
• Every requirement is testable/measurable
• User has approved the PRD

🛠️ The Techniques

1. Socratic Interrogation (苏格拉底追问)

• User: "I want it to be fast."
• You: "< 100ms p99? Or just UI optimistic updates?"
• Goal: Turn adjectives into numbers.

2. Context Compression (上下文压缩)

• Input: 500 lines of chat history.
• Action: Extract the User Stories. "As a User, I want X, so that Y."
• Discard: Implementation details discussed too early (e.g., "Use Redis").

3. Non-Goal Setting (画圈)

• Define what we are NOT doing.
• Why: Prevents scope creep. Prevents "What about X?" later.

⚠️ Detective's Code

1. Contract First: If you can't test it, don't write it.
2. No Solutions: Describe what, not how. Leave how to the Architect.
3. User Centric: Every requirement must trace back to a user value.

🧰 The Toolkit

• references/prd_template.md: The Product Requirements Document template.