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Jac

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Learn Jac on your Mac

Official docs outline

Extra Credit builds an outline of Jac's docs the first time your work uses it.

Learn Jac from your own work

Extra Credit reads your Claude Code sessions, finds the Jac concepts in the code your agents write, and quizzes you on them, measured against its official docs.

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A macOS menu bar app for people who build with Claude Code.

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JetBrains MPS

Lessons and quizzes from the code your agents write, for macOS.

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Docs outlines list section titles and link to each technology's official documentation, which belongs to its authors. Version and support data from endoflife.date and package registries. Logos from Simple Icons; trademarks belong to their owners.