mastery

A body of knowledge that belongs to you.

Organize everything that shapes how you think — with your own summaries, key insights, and personal commentary attached.

Supported resources

Every kind of source, one library.

  • Books

    Longform reading with progress, insights, and personal commentary.

  • Podcasts & episodes

    Track series and individual episodes with your own reflections.

  • Interviews

    Preserve the moments that changed how you see the work.

  • YouTube videos

    Lessons and talks with timestamps and takeaways.

  • Articles & documentation

    Reference material with topics, tags, and progress.

  • Courses

    Structured learning with completion and difficulty.

  • Open-source repositories

    The code you study, cite, and build on.

  • People & tools

    The humans and tools shaping your craft.

What it does

Not a bookmark folder. A working library.

  • Personal summaries

    The version in your own words — the one you'll come back to.

  • Key insights

    The specific ideas worth pulling out and connecting elsewhere.

  • Personal commentary

    A chronological record of what you noticed, questioned, and connected.

  • Topics and tags

    Structure that emerges from your work, not imposed on it.

  • Progress tracking

    Started, in progress, completed, reference — clearly.

  • Personal ratings

    Only your rating, not a crowd.

  • Connections to Notes

    Every idea a resource sparked, kept close to its source.

  • Connections to Projects

    The resources that shaped what you built, cited automatically.

  • Search and discovery

    Find anything in your library in a keystroke.

Begin your library.

A place for the resources actually shaping your craft.