Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

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

Fix Chrome Status Access Violation After Update
After a Chrome update, some users see a status access violation error when openi...

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 pnpm Not Working After Node.js Update
After updating Node.js, you may find that pnpm commands fail with errors like command not f...

Fix Git SSL Certificate Problem: Unable to Get Local Issuer
If you see fatal: unable to access 'https://...': SSL certificate problem: unable t...

Fixing pip Externally-Managed Environment Errors
If you see the error error: externally-managed-environment when running pip in...