Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You're trying to push a commit that includes a large file—maybe a dataset, a binary, or a gen...

You run npm install and get an error like engine "node" is incompatibl...

Fix 'Python' Command Not Found in Windows 10 64-bit
You open Command Prompt, type python, and see 'python' is not recogniz...

Fix VS Code IntelliSense Not Working in WSL
You open a project in VS Code connected to WSL (Windows Subsystem for Linux), and IntelliSense ju...

Python Virtual Environment Not Activating on Mac: Fixes
You open Terminal, run source venv/bin/activate, and nothing happens—or you get an e...

Git index.lock File Exists: Quick Fix Checklist
You try to run a Git command and see fatal: Unable to create 'path/.git/index.lock'...