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" ...

If you see FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaS...

Fix Git Push Rejected: Non-Fast-Forward Error
You try to push a commit to a remote repository and get: ! [rejected] main -> main (non-...

Fix npm run build Failure Due to Node Version Mismatch
You run npm run build and it fails with errors like SyntaxError: Unexpected to...

Fix Nginx Upstream Connection Refused in Docker
You have Nginx running, either on the host or in a container, proxying to another Docker containe...

Fix VS Code Terminal Not Opening on Mac
You open VS Code, press Ctrl+` or click the Terminal panel, and nothing happens. The...