Show HN: AI tutors for Python, Ruby, and JavaScript powered by my personal notes

Category: infrastructure

Tags: ai-tutor, fastapi, knowledge-graph, retrieval-augmented-generation, zettelkasten

Score: 5.5/10 (Innovation: 4, Technical: 6, Documentation: 7, Utility: 5)

An AI-powered backend that provides tutoring for Python, Ruby, and JavaScript using a personal Zettelkasten knowledge base of interconnected markdown notes. It combines TF-IDF retrieval with graph-based context expansion and Anthropic's API to generate grounded responses, showcasing applied product and engineering work.

Target audience: backend devs, ai engineers, edtech developers

Repository: https://github.com/JoeCardoso13/brush-up-backend · Python · MIT

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