Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You’re running a Node.js script and it crashes with FATAL ERROR: CALL_AND_RETRY_LAST Alloca...

Python Requests Timeout Not Waiting: Fixes and Checks
You set a timeout in Python's requests library, but the call either hangs foreve...

Chrome Sync Not Working on School Chromebook: Fixes
If your Chrome browser isn't syncing bookmarks, passwords, or history on a school Chromebook,...

Fix Nginx 'Permission Denied' Upstream Errors
When Nginx logs permission denied while connecting to an upstream (e.g., a Unix sock...

Docker Compose .env File Not Loading: Common Fixes
You set environment variables in a .env file next to your docker-compose.yml

Python Virtual Environment Not Activating in Git Bash: Fixes
You're in Git Bash on Windows, you run source venv/Scripts/activate, and nothing...