Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

When you open the integrated terminal in Visual Studio Code and see the error spawn ENOENT<...

Docker Build Context Canceled: Checklist and Fixes
You run docker build and see context canceled before the build finishes...

Fixing Nginx Upstream Connection Refused and Permission Denied
If you see connect() failed (111: Connection refused) or connect() failed (13:...

Fix VSCode Terminal Not Opening with Git Bash
You open Visual Studio Code, press Ctrl+` to bring up the terminal, and expect Git Bash. Instead,...

Fix Cloudflare Origin Certificate Mismatch Errors
If you see 'Origin Certificate Mismatch' in Cloudflare or browser warnings, it usually me...

Fix VSCode Breakpoints Not Hitting in TypeScript
You set a breakpoint in a TypeScript file, run the debugger, and execution never pauses. This is ...