Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

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Latest checklists

You installed Python but typing python in Command Prompt returns 'python&#...

Fix VSCode Git Authentication Failed: Permission Denied
If you see 'Git authentication failed' or 'permission denied' when pushing or pul...

Fix VS Code Breakpoints Not Hitting in WSL
If you're debugging a project in WSL and VS Code breakpoints aren't being hit, you're...

Fix Python Dependency Conflicts After an Update
You updated your Python environment or a package, and now your script throws import errors or ver...

Fix Nginx Upstream Connection Refused Socket Error
When Nginx returns a 502 Bad Gateway or logs upstream connection refused

Fix npm install Permission Denied on Shared Hosting
When you run npm install on a shared hosting server, you might see errors like