LearnHarness
A desktop tutor that starts by finding where your understanding stops
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Learncroc
Short, playable lessons with spaced review, built from the docs you must know
It turns the RFC or onboarding doc you skimmed into something you can explain a week later, without sending company docs to anyone's server.
Learncroc breaks a document into a map of short stops, each two to four minutes: you guess first, manipulate the idea, then face checkpoints on new situations. Reviews are scheduled with FSRS, the algorithm behind modern Anki, and can run from the terminal. It runs on your laptop with Bun or Docker, stores everything in ~/.learncroc, and works fully offline with Ollama or with your own Anthropic, OpenAI or OpenRouter key under a spend cap. Hand-made sample maps need no key. Open source, no account.
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