mvp-builder

# MVP Builder Skill

This skill provides a complete MVP development workflow optimized for vibe coders. It adapts the BMAD (Business/Market → Architecture → Development) methodology for AI-assisted rapid development.

## Core Principles

### Vibe Coding MVP Philosophy

1. **Ship Fast** - Get something working in days, not months
2. **Validate Early** - User feedback > perfect code
3. **Iterate Quickly** - Small improvements, frequent releases
4. **Right-Size** - Match complexity to project size
5. **Stay Focused** - One core feature done well

### Project Sizing

Automatically adjust process based on scope:

| Level | Description | Timeline | Process |
|-------|-------------|----------|---------|
| 0 | Quick prototype | Hours | Brief → Build |
| 1 | Weekend project | 1-3 days | Brief → Spec → Build |
| 2 | Side project | 1-2 weeks | Full light process |
| 3 | Serious product | 1-2 months | Full process |
| 4 | Complex product | 3+ months | Extended process |

## Phase 1: Product Brief

### Structure

```markdown
# Product Brief: [Name]

## Vision
One sentence describing the product's purpose.

## Problem Statement
- Who has this problem?
- What is the problem?
- How painful is it? (1-10)
- Current solutions and their shortcomings

## Target User
- Primary persona: [Name, role, context]
- Key characteristics: [List]
- Jobs to be done: [List]

## Core Value Proposition
[One clear statement of unique value]

## MVP Scope

### Must Have (P0)
- [ ] Feature 1 - [Why essential]
- [ ] Feature 2 - [Why essential]

### Should Have (P1)
- [ ] Feature 3 - [Value added]
- [ ] Feature 4 - [Value added]

### Nice to Have (P2)
- [ ] Feature 5 - [Future consideration]

## Success Metrics
1. [Metric 1] - Target: [Value]
2. [Metric 2] - Target: [Value]

## Constraints
- Timeline: [Deadline]
- Budget: [Amount]
- Technical: [Limitations]
- Team: [Resources]

## Assumptions to Validate
1. [Assumption] - How to test
2. [Assumption] - How to test
```

### Brief Generation Process

1. Ask c