make-no-mistakes

Claude sometimes says a function “should work” when it does not, and occasionally invents an API. The README’s diagnosis: nobody ever explicitly told it not to make mistakes. This plugin tells it, every time.

Estimated quality improvement is somewhere between 0% and 100%.

How it works

It’s a UserPromptSubmit hook. On each prompt, Claude Code runs a shell script that reads the hook payload from stdin and echoes:

{"additionalContext": "Make no mistakes."}

That’s the full implementation: a plugin.json, a hooks.json pointing at the script, and the script. Claudegoblikon uses the same hook with a much longer instruction, wrapped in the fuller hookSpecificOutput form.

Installing

# just you, all projects
claude plugin install /path/to/make-no-mistakes --scope user

# the whole team, via the project
claude plugin install /path/to/make-no-mistakes --scope project

To try it for one session without installing:

claude --plugin-dir /path/to/make-no-mistakes

FAQ, abridged

• What if Claude makes a mistake anyway? That’s on you for not installing it sooner.
• Is this peer-reviewed? It has not been not peer-reviewed.