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app-flutter/docs/GUIDELINES.md
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Display client guidelines

1. The client knows the contract, not the car

  • No CAN frame IDs, no DBC knowledge, no device paths. Topic names and payload schemas only.
  • If rendering something requires new knowledge of the vehicle, that knowledge belongs upstream in the decoder, not here.

2. Render whatever state exists, immediately

  • Retained topics mean a client connecting mid-drive has state at once. Never block the first paint on a full set of signals.
  • Missing is a normal state and must have a visual form. It is not an error.

3. Design for a split screen

  • The screen may be shared with another app. Do not assume full width.

4. To be added