Chapter 2: Documentation and Context Management

A Practical Guide

This guide will show you how to create and maintain effective documentation for your AI-assisted development project. You'll learn how to manage project context, create specialized documentation, and keep everything organized and up-to-date.

What You'll Learn

  • How to structure project documentation effectively
  • Creating and maintaining essential documentation files
  • Managing context in AI interactions
  • Writing clear and useful code documentation
  • Organizing documentation for maximum clarity

Quick Start

  1. Create a /docs folder in your project root
  2. Set up essential documentation files (database.md, roadmap.md)
  3. Add file headers to all code files
  4. Start documenting as you code

Why This Matters

Good documentation is like a map for your project. It helps both you and the AI understand where everything is and how it works together. Think of it as writing notes for your future self and your team.

Essential Documentation Files

Start by setting up a clear documentation structure in your project:

your-project/
├── docs/
│   ├── database.md
│   ├── roadmap.md
│   ├── components/
│   │   ├── frontend.md
│   │   └── backend.md
│   └── processes/
│       ├── deployment.md
│       └── testing.md

Database Documentation Template

Use this template to document your database structure:

# Database Documentation

## Tables
### Users
- Fields:
  - id: UUID (primary key)
  - email: STRING (unique)
  - created_at: TIMESTAMP
- Indexes:
  - email_idx on (email)
- Access Policies:
  - Read: authenticated users
  - Write: admin only

### Orders
[Similar structure for each table...]

## Relationships
- Users -> Orders (one-to-many)
- Orders -> Products (many-to-many)

## Performance Notes
- Indexed queries to check first
- Common performance pitfalls
- Optimization strategies

Project Roadmap Template

Keep track of your project's direction with this template:

# Project Roadmap

## Current Sprint
- Feature: User Authentication
- Status: In Progress
- Deadline: [Date]
- Key Challenges: [List any blockers]

## Upcoming Features
1. Shopping Cart Integration
   - Priority: High
   - Timeline: Next Sprint
   - Dependencies: User Auth

2. Payment Processing
   - Priority: Medium
   - Timeline: Q2
   - Dependencies: Shopping Cart

## Known Issues
- List current bugs
- Technical debt items
- Performance concerns

Code Documentation Best Practices

File Headers

Every code file should start with this information:

/**
 * File: src/components/auth/LoginForm.jsx
 * Purpose: Handles user login form and authentication
 * Dependencies: 
 *   - AuthContext
 *   - ValidationUtils
 * Last Updated: [Date]
 */

Process Documentation

Use this template for documenting common procedures:

# Process: Deploying to Production

## Prerequisites
- All tests passing
- Code reviewed
- Documentation updated

## Steps
1. Build Application
   ```bash
   npm run build
   ```

2. Run Final Tests
   ```bash
   npm run test:e2e
   ```

3. Deploy
   ```bash
   npm run deploy:prod
   ```

## Verification
- Check deployment logs
- Verify database migrations
- Test critical paths
- Monitor error rates

## Rollback Plan
If issues occur:
1. Revert to last stable version
2. Run rollback scripts
3. Notify team

Common Pitfalls and Solutions

Outdated Documentation

Set up regular documentation review cycles and update docs as part of your development process.

Inconsistent Formatting

  • Use consistent markdown formatting
  • Follow established templates
  • Use automated formatting tools
  • Maintain a style guide

Quick Tips

Documentation Maintenance

  • Update docs with every code change
  • Use automated documentation tools
  • Keep a changelog
  • Review docs regularly

Organization Tips

  • Use clear, descriptive file names
  • Maintain a consistent folder structure
  • Link related documentation
  • Include search-friendly keywords
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