Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you're on a modern Linux distribution and see error: externally-managed-environment<...

Docker Container Exits Immediately on Mac: Fixes
You start a Docker container on your Mac, and it stops within seconds. The container exits immedi...

Fix Chrome Access Violation Error 0x00000000
If you see an access violation error with code 0x00000000 in Chrome, it usually means the browser...

VSCode IntelliSense Not Working for React: Fixes
You open a React component in VSCode, start typing a prop or a hook, and get no suggestions. Inte...

Fix Cloudflare Wildcard Subdomain and Root Domain Conflict
If you use a wildcard DNS record (e.g., *.example.com) on Cloudflare, you may run in...

How to Recover from Detached HEAD in Git
You're working in a Git repository and suddenly see a message like 'You are in 'detac...