# Requirements Clarity Plugin

## Overview

This Claude Code plugin automatically detects vague requirements and transforms them into crystal-clear Product Requirements Documents (PRDs) through systematic clarification.

## Installation

```bash
/plugin install requirements-clarity
```

Or add to your `.clauderc`:

```json
{
  "plugins": {
    "requirements-clarity": {
      "enabled": true
    }
  }
}
```

## How It Works

### Automatic Activation

The plugin activates when Claude detects:

1. **Vague Feature Requests**
   ```
   User: "add login feature"
   User: "implement payment system"
   User: "create user dashboard"
   ```

2. **Missing Technical Details**
   - No technology stack mentioned
   - No architecture or constraints specified
   - No integration points identified

3. **Incomplete Specifications**
   - No acceptance criteria
   - No success metrics
   - No edge cases or error handling

4. **Ambiguous Scope**
   - Unclear boundaries ("user management" - what exactly?)
   - No distinction between MVP and future features

### Clarification Process

```
User: "I want to implement a user login feature"
  ↓
Claude detects vague requirement
  ↓
Auto-activates requirements-clarity agent
  ↓
Initial assessment: 35/100 clarity score
  ↓
Round 1: Ask 2-3 targeted questions
  ↓
User responds
  ↓
Score update: 35 → 72
  ↓
Round 2: Continue clarifying gaps
  ↓
User responds
  ↓
Score update: 72 → 93 ✓ (≥90 threshold)
  ↓
Generate PRD files:
  - ./.claude/specs/user-login/prd.md
  - ./.claude/specs/user-login/clarification-log.md
```

## Scoring System (100 points)

| Dimension | Points | Criteria |
|-----------|--------|----------|
| **Functional Clarity** | 30 | Clear inputs/outputs (10), User interaction (10), Success criteria (10) |
| **Technical Specificity** | 25 | Tech stack (8), Integration points (8), Constraints (9) |
| **Implementation Completeness** | 25 | Edge cases (8), Error handling (9), Data validation (8) |
| **Business Context** | 20 | Problem statement (7), Target users (7), Success metrics (6) |

**Threshold**: ≥ 90 points required before PRD generation

## Output Structure

### 1. Clarification Log
`./.claude/specs/{feature-name}/clarification-log.md`

Documents the entire clarification conversation:
- Original requirement
- Each round of questions and answers
- Score progression
- Final assessment breakdown

### 2. Product Requirements Document
`./.claude/specs/{feature-name}/prd.md`

Structured PRD with four main sections:

#### Requirements Description
- Background: Business problem, target users, value proposition
- Feature Overview: Core functionality, boundaries, user scenarios
- Detailed Requirements: Inputs/outputs, interactions, data, edge cases

#### Design Decisions
- Technical Approach: Architecture, components, data storage, APIs
- Constraints: Performance, compatibility, security, scalability
- Risk Assessment: Technical, dependency, timeline risks

#### Acceptance Criteria
- Functional: Checklistable feature requirements
- Quality Standards: Code quality, testing, performance, security
- User Acceptance: UX, documentation, training

#### Execution Phases
- Phase 1: Preparation - Environment setup
- Phase 2: Core Development - Core implementation
- Phase 3: Integration & Testing - QA
- Phase 4: Deployment - Release

## Testing Guide

### Test Case 1: Vague Login Feature

**Input**:
```
"I want to implement a user login feature"
```

**Expected Behavior**:
1. Claude detects vague requirement
2. Shows initial score (~30-40/100)
3. Asks 2-3 questions about:
   - Login method (username+password, phone+OTP, OAuth?)
   - Functional scope (remember me, forgot password?)
   - Technology stack (backend language, database, auth method?)

**Expected Output**:
- Score improves to ~70+ after round 1
- Additional questions about security, error handling, performance
- Final score ≥ 90
- PRD generated in `./.claude/specs/user-login/`

### Test Case 2: Ambiguous E-commerce Feature

**Input**:
```
"add shopping cart to the website"
```

**Expected Behavior**:
1. Auto-activation (no tech stack, no UX details, no constraints)
2. Questions about:
   - Cart behavior (guest checkout? save for later? quantity limits?)
   - User experience (inline cart vs dedicated page?)
   - Backend integration (existing inventory system? payment gateway?)
   - Data persistence (session storage, database, local storage?)

**Expected Output**:
- Iterative clarification (2-3 rounds)
- Score progression: ~25 → ~65 → ~92
- PRD with concrete shopping cart specifications

### Test Case 3: Clear Requirement (Should NOT Activate)

**Input**:
```
"Fix the null pointer exception in auth.go line 45 by adding a nil check before accessing user.Email"
```

**Expected Behavior**:
- Agent does NOT activate (requirement is already clear)
- Claude proceeds directly to implementation

## Benefits

1. **Proactive Quality Gate**: Prevents unclear specs from proceeding to implementation
2. **Zero Friction**: Users describe features naturally, no command syntax needed
3. **Context Awareness**: Claude recognizes ambiguity patterns automatically
4. **Persistent Mode**: Stays active throughout clarification conversation

## Command Alternative

For manual invocation, use:
```
/clarif <your requirement description>
```

## Troubleshooting

### Plugin Not Activating

**Problem**: Claude doesn't enter clarification mode for vague requirements

**Solutions**:
1. Verify plugin is installed: `/plugin list`
2. Check plugin is enabled in `.clauderc`
3. Ensure agent and command files exist in plugin directory
4. Try more explicit vague requirement: "add user feature"

### Premature PRD Generation

**Problem**: PRD generated before score reaches 90

**Solution**: This is a bug - agent instructions explicitly require ≥90 threshold. Review the clarification log to see actual score.

## References

- **Claude Code Plugins Documentation**: https://docs.claude.com/en/docs/claude-code/plugins
- **Article**: https://github.com/stellarlinkco/articles/blob/master/deep-agents-zh.md

## Changelog

### v1.0.0 (2025-10-21)
- Created plugin in correct `.claude-plugin/` directory format
- Added `marketplace.json` plugin metadata
- Commands in `commands/clarif.md`
- Agent in `agents/clarif-agent.md`
- All prompts in English
- Maintained 100-point scoring system and PRD structure
- Compatible with Claude Code plugin system

---

**License**: MIT  
**Author**: Claude Code Dev Workflows  
**Homepage**: https://github.com/cexll/myclaude