Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

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Latest checklists

You start a Docker container with a volume mount, and it exits immediately – no error, or just a ...

When reading a CSV or text file with pandas.read_csv(), you might encounter a ...

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

Fix 'fatal: refusing to merge unrelated histories' in Git
You cloned a repository, made some commits locally, and now when you try to git pull...

Fix Git Push Rejected Non Fast Forward Branch Error
If you see ! [rejected] and non-fast-forward when running git pus...

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