Build Brief Generator

I'm building a prototype for a product idea. Help me create a Build Brief — a 2–5 page structured requirements document optimized for an AI coding agent (Cursor, Claude Code) to build a working prototype.

Here's what I know so far:

**My rough idea:** [Describe your idea in 2–3 sentences. Be as specific or vague as you are right now — that's fine.]

**Who I think this is for:** [Describe the person. What's their role? What do they do day-to-day? If you don't know yet, say so.]

**The pain I've observed or heard about:** [What specific frustration, cost, or workaround have you seen? Include quotes from conversations if you have them.]

**What I think the core feature is:** [What's the one thing this tool does? If you're not sure, describe the outcome you want for the user.]

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Structure the Build Brief using these four sections:

### 1. Persona
Create an operator profile (not a marketing avatar). Include:
- Role and daily context
- Technical comfort level
- Current workflow and tools
- Success definition: "They open the app and feel ___ within 5 seconds"

### 2. Problem
Structure as a table with columns: Problem Area | Impact | Current Workaround.
Then write 2–3 Jobs To Be Done in this format: Job ID | Job Statement | Trigger Situation | Desired Outcome.
Every problem must pass the "show me the pain" test — quantified or described as a specific frustrating moment.

### 3. Product
- List 3–5 features maximum, each tied to a specific problem from Section 2
- Write user stories in "As a [persona], I want [action], so that [value]" format
- Include concrete acceptance criteria for each story (bullet points the AI can check against)
- Mark each feature P0 (must work in prototype), P1 (visible but not fully built), or P2 (explicitly out of scope)
- Include a "Non-Goals" section listing what we are NOT building (auth, mobile app, real integrations, etc.)

### 4. Proposition
Write draft landing page copy:
- One-sentence value proposition using: "For [persona] who [problem], [product] is a [category] that [benefit]. Unlike [alternative], we [differentiator]."
- Headline (10 words or fewer)
- Subheadline (one sentence)
- 3 key benefits (one line each)
- A social proof hook (a quote a future user might say)
- CTA text

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Additional rules:
- Keep the total Build Brief under 5 pages
- Use tables and structured formatting — this document will be read by an AI, not presented in a meeting
- Include guidance for realistic mock data (names, amounts, dates that make the demo feel real — no Lorem Ipsum)
- Write it so that a developer or AI agent with NO other context could build the prototype from this document alone
- Flag anywhere my input is too vague and ask me to clarify before finalizing