Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You run git pull or git merge and get:

fatal: refusing to...

How to Fix Node.js Heap Out of Memory in VS Code
If you see FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaS...

Fix VS Code Terminal Not Working After Update
After a VS Code update, the integrated terminal may fail to start, show a blank window, or displa...

Fix Cloudflare Wildcard Subdomain and Root Domain Conflict
If you use a wildcard DNS record (e.g., *.example.com) on Cloudflare, you may run in...

Firefox Secure Connection Failed Only on WiFi: Fixes
If Firefox shows a "Secure Connection Failed" error only when you're on WiFi—but the ...

Fix NET::ERR_CERT_AUTHORITY_INVALID in Chrome
When Chrome shows 'NET::ERR_CERT_AUTHORITY_INVALID', it means the browser cannot verify t...