Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You're installing a package with pip, and suddenly you see a wall of red text: ERROR: C...

Fix ERR_CERT_AUTHORITY_INVALID on Localhost
When testing a local web app, you may see ERR_CERT_AUTHORITY_INVALID in Chrome or si...

Setting Python Requests Timeout Per Request: Practical Guide
When a Python script using the requests library hangs indefinitely on a slow API, yo...

Node.js Memory Limit Increase Not Working: Fixes
You set --max-old-space-size=4096 but Node.js still crashes with a memory error. Thi...

How to Fix Git Detached HEAD and Checkout a Branch
You're working in a Git repository, make some commits, and then realize you're in a '...

Fix Node Version Incompatibility When Running npm install
You run npm install and get an error like engine "node" is incompatibl...