Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you've generated a Cloudflare origin certificate but it doesn't appear in your dashboa...

You're in the middle of a Git operation—commit, merge, or rebase—and Git stops with: fa...

Fix Cloudflare SSL Full Strict Redirect Loop
If you've enabled Cloudflare's SSL/TLS encryption mode to Full (Strict) ...

Fix 'port already allocated' for Nginx in Docker Compose
You're starting your Docker Compose setup with Nginx, and you see "port is already alloca...

Fix 'npm package json not found' Error When Using npx
When you run npx some-package and see an error like “npm package json not found”...

Fix Nginx Upstream Connection Refused Behind Cloudflare
If you see upstream connection refused in your Nginx error logs while using Cloudfla...