1 files changed, 22 insertions, 0 deletions
diff --git a/composeApp/src/commonMain/kotlin/coffee/liz/ecs/System.kt b/composeApp/src/commonMain/kotlin/coffee/liz/ecs/System.kt
new file mode 100644
index 0000000..0f8ef2a
--- /dev/null
+++ b/composeApp/src/commonMain/kotlin/coffee/liz/ecs/System.kt
@@ -0,0 +1,22 @@
+package coffee.liz.ecs
+
+import kotlin.reflect.KClass
+
+/**
+ * Systems contain the logic that operates on entities with specific components.
+ */
+interface System {
+    /**
+     * Systems that must run before this system in the update loop.
+     * Used to construct a dependency DAG.
+     */
+    val dependencies: Set<KClass<out System>>
+        get() = emptySet()
+
+    /**
+     * Update this system. Called once per frame.
+     * @param world The world containing entities and systems
+     * @param deltaTime Time elapsed since last update in seconds
+     */
+    fun update(world: World, deltaTime: Float)
+}