Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You run npm run build and see a PostCSS error. This often happens after updating pac...

When Chrome displays ERR_NAME_NOT_RESOLVED, it means the browser cannot translat...

If you see git SSL certificate problem: unable to get local issuer certificate while...

You're browsing a site and get a Cloudflare 522 error—'Connection timed out' or '...

If your site shows broken padlocks, mixed content warnings, or SSL errors after changing Cloudfla...

You open VS Code, press Ctrl+` or click the Terminal panel, and nothing happens. The...