Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If your laptop screen goes black when using Chrome, especially during video playback or scrolling...

You're in the middle of a Git operation—commit, merge, or rebase—and Git stops with: fa...

How to Fix Git Detached HEAD and Checkout a Branch
You're working in a Git repository, make some commits, and then realize you're in a '...

Fix VSCode Terminal 'Permission Denied' on Windows
If you see 'permission denied' in the VSCode integrated terminal on Windows, it's usu...

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...

Fix Nginx 502 Bad Gateway: Upstream Connection Refused
If you're seeing a 502 Bad Gateway error with "upstream connection refused" in your N...