Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You're working in VS Code on a Mac, and when you try to run a command in the integrated termi...

You run docker-compose up and see errors like WARNING: The VARIABLE_NAME varia...

Fix Nginx 'upstream connection refused' When Talking to PHP-FPM
You're seeing upstream connection refused in your Nginx error log, and your site...

Fix 'port already allocated' Error in Docker Compose
You run docker compose up and see port is already allocated. This means...

Fix npm install ENOENT Error: No Such File or Directory
When you run npm install and see an error like ENOENT: no such file or directo...

How to Clear pnpm Cache: Step-by-Step Guide
If you're seeing unexpected build errors, outdated dependencies, or running low on disk space...