Hey HN! Spellcaster is a Python-based CLI tool for running spelling and grammar checks across documentation files.<p>LLMs are great proofreaders, and while rule-based spellcheckers exist, we noticed there wasn’t a good CLI tool that leveraged AI agents. So we built one! Spellcaster came together over a weekend at the Mintlify AI DevTools hackathon in San Francisco[0], where it won the Best Demo Award.<p>We ran Spellcaster against several large open source projects and identified hundreds of readability issues in their docs. Some popular ones:<p>* Cursor: 116 errors<p>* Mintlify 245<p>* Vercel: 1053 (My favorite was Vercel spelling "Lorem ipsum" wrong in one of their pages).<p>Spellcaster uses LiteLLM for easy model swapping and AgentOps for cost and error tracking.<p>[0] <a href="https://x.com/AlexReibman/status/1834524984183767276" rel="nofollow">https://x.com/AlexReibman/status/1834524984183767276</a>