# 06. Runtime View

## Scenario 1 — Happy Path (single rover)

![Happy Path Sequence](diagrams/runtime-happy-path.svg)

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## Scenario 2 — Boundary Violation

When `MoveForward` computes `(x + dx, y + dy)` and `Plateau.is_within()` returns `False`:

![Boundary Violation Sequence](diagrams/runtime-boundary-violation.svg)

1. The rover's position is **not updated** — it stays in place.
2. Processing continues with the next command in the sequence.
3. No exception is raised; the mission completes normally.

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## Scenario 3 — Multiple Rovers

![Multiple Rovers Sequence](diagrams/runtime-multiple-rovers.svg)

Each rover is fully independent. The final state of rover N has no effect on rover N+1.

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## Scenario 4 — Obstacle Detected (optional extension)

If obstacles are registered on the plateau:

1. `MoveForward` calls `Plateau.is_blocked(x + dx, y + dy)`.
2. If blocked, the rover stops and the mission for that rover ends early.
3. Output includes the last safe position prefixed with `O:` (or similar convention).