Fix

packages/effect-fc/src/types/SubscriptionSubRef.ts

@@ -1,4 +1,4 @@
-import { Effect, Effectable, Option, Readable, Ref, Stream, Subscribable, SubscriptionRef, SynchronizedRef, type Types, type Unify } from "effect"
+import { Chunk, Effect, Effectable, Option, Readable, Ref, Stream, Subscribable, SubscriptionRef, SynchronizedRef, type Types, type Unify } from "effect"
 import * as PropertyPath from "./PropertyPath.js"
 
 
@@ -100,3 +100,12 @@ export const makeFromPath = <B, const P extends PropertyPath.Paths<B>>(
     parentValue => Option.getOrThrow(PropertyPath.get(parentValue, path)),
     (parentValue, value) => Option.getOrThrow(PropertyPath.immutableSet(parentValue, path, value)),
 )
+
+export const makeFromChunkRef = <A>(
+    parent: SubscriptionRef.SubscriptionRef<Chunk.Chunk<A>>,
+    index: number,
+): SubscriptionSubRef<A, Chunk.Chunk<A>> => new SubscriptionSubRefImpl(
+    parent,
+    parentValue => Chunk.unsafeGet(parentValue, index),
+    (parentValue, value) => Chunk.replace(parentValue, index, value),
+)

packages/example/src/todo/Todo.tsx

@@ -37,10 +37,7 @@ export const Todo = Component.make(function* Todo(props: TodoProps) {
 
     const ref = yield* Hook.useMemo(() => Match.value(props).pipe(
         Match.tag("new", () => Effect.andThen(makeTodo, SubscriptionRef.make)),
-        Match.tag("edit", ({ index }) => Effect.succeed(SubscriptionSubRef.makeFromGetSet(state.ref, {
+        Match.tag("edit", ({ index }) => Effect.succeed(SubscriptionSubRef.makeFromChunkRef(state.ref, index))),
-            get: parent => Chunk.unsafeGet(parent, index),
-            set: (parent, v) => Chunk.replace(parent, index, v),
-        }))),
         Match.exhaustive,
     ), [props._tag, props.index])