Documentation Types & Tools

Documentation Types & Tools

Good documentation is essential for maintainability, onboarding, and knowledge transfer. It's not just about writing docs — it's about creating living documentation that evolves with the project.

Types of Documentation

  DOCUMENTATION TYPES
  ===================

  +-------------------+----------------------------------+
  | Type              | Purpose                          |
  +-------------------+----------------------------------+
  | README            | Project overview, setup guide    |
  | API Reference     | How to use the API               |
  | Architecture Docs | System design decisions          |
  | User Guides       | End-user instructions            |
  | Developer Guides  | How to contribute                |
  | Runbooks          | Operations procedures            |
  | Changelogs        | Version history                 |
  | ADRs              | Architecture Decision Records    |
  +-------------------+----------------------------------+

  The Docs Divide:
  - Code-level:   README, inline comments, API docs
  - System-level: Architecture, design decisions
  - User-level:   Guides, tutorials, FAQs

README Structure

  IDEAL README STRUCTURE
  ======================

  # Project Name

  One-line description of what this project does.

  ## Features
  - Feature 1
  - Feature 2

  ## Quick Start
  ```bash
  npm install
  npm start
  ```

  ## Documentation
  Link to full documentation

  ## Contributing
  How to contribute

  ## License
  MIT / Apache 2.0

Architecture Decision Records (ADRs)

  ADR TEMPLATE
  ============

  # ADR-001: Use PostgreSQL as Primary Database

  ## Status
  Accepted

  ## Context
  We need a reliable, scalable database for our
  e-commerce platform handling 10K transactions/day.

  ## Decision
  We will use PostgreSQL as our primary database.

  ## Consequences
  + Strong ACID compliance
  + Excellent JSON support
  - Requires DBA expertise for optimization
  - Migration from MySQL will take 2 weeks

  ## Alternatives Considered
  - MySQL: Less feature-rich for our needs
  - MongoDB: Not suitable for transactional data

Documentation Tools

• GitBook: Beautiful documentation sites
• Docusaurus: Open-source docs by Facebook
• Swagger/OpenAPI: API documentation
• MkDocs: Python-based documentation
• Storybook: UI component documentation

Key Takeaways

• Different documentation serves different audiences
• README is the entry point — make it helpful
• ADRs capture important architectural decisions
• Documentation should be living and maintained alongside code