Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you see fatal: Unable to create 'index.lock': File exists. when running G...

You uninstall a program, and suddenly some taskbar icons disappear—even for apps you didn't r...

If you see fatal: refusing to merge unrelated histories when running git merge...

Fix Permission Denied on chmod in VS Code Terminal
You're running chmod in the VS Code integrated terminal and seeing 'permissi...

Fix Docker Compose 'Port Already Allocated' for MySQL
You run docker compose up and get an error like Error: Port 3306 is already al...

How to Resolve Git Unrelated Histories Merge Conflict
When you try to merge two branches that have no common commit history, Git refuses with fat...