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When to use VCI

Good fit​

  • Personal tools with a bounded action vocabulary (to-do, notes, timers, expense capture, journaling, kanban, habit trackers, shopping lists).
  • Solo users on a single device.
  • Apps where every meaningful action is known ahead of time.

Bad fit​

  • Multi-user collaborative apps (needs a backend to broker state).
  • Public production deployments without a token-minting backend.
  • Apps requiring precise pointer selection, dragging, or dense forms.