Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

When you run npm install or yarn install and see an error like en...

Fix Windows Security App Blocked by Antivirus
You open Windows Security (formerly Windows Defender) only to see an error or blank screen becaus...

How to Fix Git Detached HEAD Error
You run git status and see "HEAD detached at" followed by a commit hash. Thi...

Fix 'python command not found' on Windows
You're trying to run a Python script on Windows, but you get an error like 'python&...

Fix Node.js Heap Out of Memory When Running Tests
When running test suites, you may encounter a fatal error like FATAL ERROR: Ineffective mar...

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”...