---
description: Unity C# script conventions.
globs: Assets/**/*.cs
alwaysApply: false
---

- One public type per file; the file name matches the type. Namespaces follow the folder under `Assets/Scripts/`.
- Serialise private fields with `[SerializeField] private`, not public fields.
- Cache component lookups in `Awake`; no `GetComponent`, `Find` or allocations in `Update`.
- Use `TryGetComponent` instead of `GetComponent` plus a null check.
- Do not compare Unity objects with `?.` or `??`; use `== null` or implicit bool, which respect destroyed objects.
- New input code uses the Input System package, not `UnityEngine.Input`, if the project has it installed.