Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

Python Virtual Environment Not Activating on Mac: Fixes

Python Virtual Environment Not Activating on Mac: Fixes

You open Terminal, run source venv/bin/activate, and nothing happens—or you get an e...

Fix Angular Breakpoints Not Hit in VS Code

Fix Angular Breakpoints Not Hit in VS Code

You set a breakpoint in an Angular component or service, start debugging in VS Code, and the brea...

Fix 'Python' Command Not Found After Reinstall on Windows

Fix 'Python' Command Not Found After Reinstall on Windows

You reinstalled Python on Windows, but when you type python in Command Prompt, you g...

Fix Nginx Upstream Connection Refused & Upstream Not Found

Fix Nginx Upstream Connection Refused & Upstream Not Found

When you see upstream connection refused or upstream not found in your ...

Fix VS Code Source Control Not Detecting Changes with Permission Denied

Fix VS Code Source Control Not Detecting Changes with Permission Denied

You open VS Code, make edits, but the Source Control panel shows no changes. Or you see a "pe...

Fix Git SSL Certificate Problem with Proxy: Unable to Get Local Issuer

Fix Git SSL Certificate Problem with Proxy: Unable to Get Local Issuer

When you see fatal: unable to access 'https://...': SSL certificate problem: unable...