Ten million tokens sounds infinite. It is not. I burned through a large chunk of it in one weekend. The result? A legacy Python codebase with type annotations on every function. No manual edits. No coffee-fueled marathon. Just a batch script and patience.

Disclosure: This article was prepared as part of MonkeyCode's product outreach.

The Problem

A friend inherited a Django project. Eight years old. Forty-three modules. Zero type hints. The team wanted to add mypy to CI. That requires annotations everywhere. Doing it by hand would take days. Hiring someone would cost real money.

I saw a different path. MonkeyCode offers free model access and a free server. The free tier includes a 10-million-token allowance as of this writing. Check the README for current numbers. I decided to use that allowance for a batch job instead of interactive chat.