Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you're running npm install on a Linux machine and get a build failure for

If you see an error like fatal: Unable to create 'path/to/repo/.git/index.lock': Fi...

Git Fatal: Refusing to Merge Unrelated Histories – Workaround
You try to merge two Git branches and get this error:
fatal: refusing to merge unre...

Fix npm ENOENT package.json Not Found Due to Wrong Directory
You run npm install or npm start and get an error like ENOENT: no...

Fix npm install Permission Denied in VS Code Terminal
When you run npm install in the VS Code terminal and get a permission denied error, ...

Fix Node Sass Build Failed GYP Error: Step-by-Step Guide
When you see "node sass build failed" with a "gyp error" during npm install, it u...