Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You try to merge two branches in Git, and get fatal: refusing to merge unrelated histories<...

Python Dependency Conflict Checklist: Diagnose & Fix
You're installing a package with pip, and suddenly you see a wall of red text: ERROR: C...

Fix Git Authentication Failed in VS Code on Linux
You're working in VS Code on Linux, try to push or pull, and get a popup: "Git authentica...

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

Fix ENOENT Error: package.json Not Found in React App
When running npm start or npm install in a React app, you may see an er...

Fix Windows Update Error 0x80070005 by Taking Ownership
What Causes Error 0x80070005?
This error usually means Windows Update doesn't have pe...