Checklists for software errors, setup, and tool workflows.

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Prevent Git Index Lock File Creation: Practical Fixes

If you see fatal: Unable to create 'path/to/.git/index.lock': File exists., ...

Fix Windows Explorer Restarting After Update

After a Windows update, you may see Explorer repeatedly restarting—the taskbar flickers, desktop ...

Resolving Python Dependency Conflicts in setup.py

When you run pip install . or python setup.py develop, a dependency con...

Fixing Nginx Upstream Connection Refused on Port 443

You see "upstream connection refused" in your Nginx error log when proxying requests to p...

Fixing Node.js Heap Out of Memory on Windows

If you see a FATAL ERROR: CALL_AND_RETRY_LAST Allocation failed - JavaScript heap out of me...

Chrome Extensions Not Loading on Mac? Here's How to Fix It
If you're using Chrome on a Mac and your extensions suddenly stop loading—grayed out, missing...