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Notes tagged “derived-state”

Every note filed under derived-state, newest first.

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2026

  1. The Checkbox Is a State Machine

    The indeterminate square isn't a third value of a boolean — it's a report the tree makes about itself. Model that one distinction right and the classic stuck-parent bug becomes impossible to write.

    state-machines automata checkboxes derived-state front-end accessibility algebra-of-the-interface