Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You set a breakpoint in Visual Studio Code, start debugging with a launch.json confi...

You set up a wildcard subdomain page rule in Cloudflare—like * .example.com/*—but it...

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

Nginx Permission Denied After Restart: Fixes That Work
After restarting nginx, you might see errors like connect() to unix:/var/run/php-fpm.sock f...

Docker Container Exits Immediately in Docker Compose
If your Docker container exits immediately after starting with docker compose up, it...

Setup Cloudflare Origin Certificate for Nginx
If you use Cloudflare as a reverse proxy, enabling HTTPS between Cloudflare and your Nginx server...