Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You try to save a file or install an extension in VS Code, and get a "permission denied" ...

You run git push and get an error like ! [rejected] main -> main (non-fast-...

Fixing Nginx Upstream Connection Refused on Port 443
You see "upstream connection refused" in your Nginx error log when proxying requests to p...

How to Use Git LFS with GitHub: Setup and Troubleshooting
You're trying to push a large file to a GitHub repository and get a message like this f...

Fix Node.js Heap Out of Memory When Loading Modules
If you see FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaS...

Docker Compose Port Already Allocated: Fixes & Checks
When you run docker-compose up and see an error like Error starting userland p...