Unity API or convention

A Unity API or lifecycle convention has no equivalent meaning in Ara. This is a compilation error; the edit is not installed and the last good code keeps running.

#Common causes

• Using UnityEngine, deriving from MonoBehaviour, or declaring Unity callbacks such as Update or Start.
• Calling GetComponent<T>(), Debug.Log, or Time.deltaTime, or using lowercase fields on System.Numerics vectors.

#Fixes

• Apply the offered code fix: remove using UnityEngine, use the Ara namespace, and derive a partial class from Behaviour.

• Override OnTick(in Tick tick) for Update/FixedUpdate, OnFrame(in Frame frame) for LateUpdate, and OnSpawn() for Start/Awake; combine duplicate callbacks when needed.

• Use ref var value = ref Get<T>() for ECS writes, tick.Dt for the fixed step, Log.Info/Warn/Error for output, and uppercase vector fields such as .X.

• Code: ARA0001

• Constant: cs::UNITY_ISM

• Reported by: Ara.Analyzers