code readingproductivity

How to read an unknown codebase in 30 minutes

A practical 5-step method to quickly understand a repository you have never seen before.

When you join a new project, speed of understanding is more valuable than reading every file. Use a structured approach.

5-step method

  1. Understand context from README and package.json
  2. Identify entry points (main, routes, app bootstrap)
  3. Map exposed features
  4. Follow one critical execution path
  5. List architectural patterns and risk zones