Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You try to read a large CSV file with pandas read_csv and hit a MemoryError. This happens when th...

You run npm install or npm start and get npm ERR! package.json no...

How to Manually Remove a Stuck Git index.lock File
If Git operations suddenly fail with an error like fatal: Unable to create 'path/.git/i...

Fix VS Code Git Authentication Failed Keychain Error
If you see "Git authentication failed" in VS Code on macOS, the problem is often the macO...

npm package.json Not Found: Troubleshooting Checklist
When you run npm install or npm start and see package.json not fo...

Fix ERR_NAME_NOT_RESOLVED on All Sites in Chrome
If Chrome shows ERR_NAME_NOT_RESOLVED on every site you visit, it means your bro...