Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

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Latest checklists

If you see "Git authentication failed" in VS Code on macOS, the problem is often the macO...

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

Fix Nginx Upstream Connection Refused in Proxy Pass
When Nginx returns a 502 Bad Gateway or logs upstream connection refused

How to Enable Network Discovery for Shared Folder Access
When you can't see other computers in File Explorer's Network section, or you get an erro...

Fix 'Externally Managed Environment' Error on Linux
If you're on a modern Linux distribution (Ubuntu 23.04+, Debian 12+, Fedora 38+, etc.) and ge...

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