Checklists for software errors, setup, and tool workflows.

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Latest checklists

You run git push and get an error like ! [rejected] main -> main (non-fast-...

Fix git index.lock File Exists Error on Windows
If you see fatal: Unable to create 'index.lock': File exists. when running G...

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...

VS Code Git Changes Not Detected After Save: Fixes
You save a file in VS Code, but the Source Control panel shows no changes. The file doesn't a...

Fixing Python UnicodeDecodeError with latin-1 Codec
You're reading a file in Python and hit UnicodeDecodeError: 'charmap' codec can...

Fix VS Code 'Cannot Save File: Permission Denied' on Mac
You're editing a file in VS Code on your Mac, hit save, and get: 'Failed to save:...