Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you're seeing upstream connection refused in your Nginx error logs, it usuall...

When Microsoft Edge shows "DNS_PROBE_FINISHED_NXDOMAIN", it means the browser cannot reso...

When you see npm ERR! enoent ENOENT: no such file or directory, open '.../package.json&...

VSCode Integrated Terminal Not Showing: Fixes to Try
You open the integrated terminal in Visual Studio Code using Ctrl+` (or Cmd+`<...

Fix npm 'package.json not found' Error in Subdirectories
You're working in a subdirectory of your project, run npm install or npm r...

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...