Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you're seeing unexpected build errors, outdated dependencies, or running low on disk space...

If you connect an external monitor to your laptop and Chrome shows a black screen on that display...

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

Fix npm run build failing due to ESLint errors
You run npm run build and it fails with a wall of ESLint errors. This is common when...

Fix npm 'package.json not found' Error in Subdirectories
You're working in a subdirectory of your project, run npm install or npm r...

Fix 'Permission Denied' When Activating Python venv
When you try to activate a Python virtual environment with source venv/bin/activate ...