Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you see an error like fatal: Unable to create 'project/.git/index.lock': File ex...

ERR_NAME_NOT_RESOLVED on Chrome for Mac: How to Fix
If you see ERR_NAME_NOT_RESOLVED in Chrome on your Mac, the browser can't transl...

Fix Git Authentication Failed in VS Code on Mac
If you see "Git authentication failed" when pushing or pulling in VS Code on a Mac, the p...

VS Code Terminal Blank Screen: Quick Fixes
You open the integrated terminal in VS Code, but instead of a prompt, you get a blank or black sc...

Fix Nginx Upstream Connection Refused Error
When Nginx returns upstream connection refused in your error logs, it means Nginx tr...

Fix 'Python' Command Not Found in VS Code Terminal on Windows
When you open the VS Code terminal on Windows and type python, you might see &...