Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you see fatal: unable to access 'https://...': SSL certificate problem: unable t...

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

Fix ERR_CONNECTION_RESET Caused by Firewall Blocking Chrome
If you see ERR_CONNECTION_RESET in Chrome, it usually means something interrupte...

Fix pnpm ERR_PNPM_OUTDATED_LOCKFILE Lockfile Error
When running pnpm install or pnpm update, you may see:
ER...

Python Memory Error When Processing Large Text File: Fixes
You're processing a large text file in Python, and suddenly you hit a MemoryError

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