Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You set an environment variable in your shell, but Docker Compose ignores it. This is a common pi...

You're trying to read a CSV file in Python and you get UnicodeDecodeError: 'utf-8&#...

Git Fatal: Refusing to Merge Unrelated Histories – Workaround
You try to merge two Git branches and get this error:
fatal: refusing to merge unre...

Fixing 'Command Not Found' in VS Code Terminal
You open the integrated terminal in VS Code, type a command you know is installed, and get ...

Fix Windows 11 Update Stuck at 0% with Low Disk Space
You're trying to install a Windows 11 update, but it's stuck at 0% for a long time. One f...

Fix Git 'index.lock file exists' Error
If you see fatal: Unable to create 'path/.git/index.lock': File exists. when...