Learncroc
Short, playable lessons with spaced review, built from the docs you must know
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It locates the edge of what you already know and keeps that map between sessions, which is the part a fresh chat window throws away every time.
A desktop app that puts an agent in the role of tutor. It probes where your understanding runs out, maps the dependencies between there and your goal, then teaches in a predict-explain-check loop with separate practice sessions. Think-out-loud fields take your reasoning by typing or dictation, and what you learn is stored as propositions and reasoning chains a later session reuses; you can import your own notes. AGPL-3.0, 932 commits, with a notarised macOS build, an unsigned Windows installer, and an AppImage and .deb for Linux. Bring your own model access; a meter shows the cost.
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