fix(core): debounce state reloads

packages/core/test/agent.test.ts

@@ -1,5 +1,6 @@
 import { describe, expect } from "bun:test"
 import { Effect, Exit, Fiber, Layer, Scope, Stream } from "effect"
+import { TestClock } from "effect/testing"
 import { AgentV2 } from "@opencode-ai/core/agent"
 import { EventV2 } from "@opencode-ai/core/event"
 import { AppNodeBuilder } from "@opencode-ai/core/effect/app-node-builder"
@@ -76,7 +77,9 @@ describe("AgentV2", () => {
       )
       description = "New description"
       hidden = false
-      yield* agent.reload()
+      const reload = yield* agent.reload().pipe(Effect.forkChild({ startImmediately: true }))
+      yield* TestClock.adjust("500 millis")
+      yield* Fiber.join(reload)
 
       expect(yield* agent.get(id)).toMatchObject({ description: "New description", hidden: false })
     }),

packages/core/test/catalog.test.ts

@@ -1,6 +1,7 @@
 import { describe, expect } from "bun:test"
 import { Money } from "@opencode-ai/schema/money"
 import { Effect, Fiber, Layer, Stream } from "effect"
+import { TestClock } from "effect/testing"
 import { Catalog } from "@opencode-ai/core/catalog"
 import { Integration } from "@opencode-ai/core/integration"
 import { Credential } from "@opencode-ai/core/credential"
@@ -261,7 +262,9 @@ describe("CatalogV2", () => {
       expect((yield* catalog.model.default())?.id).toBe(old)
 
       configured = false
-      yield* catalog.reload()
+      const reload = yield* catalog.reload().pipe(Effect.forkChild({ startImmediately: true }))
+      yield* TestClock.adjust("500 millis")
+      yield* Fiber.join(reload)
       expect((yield* catalog.model.default())?.id).toBe(newest)
     }),
   )

packages/core/test/state.test.ts

@@ -1,6 +1,7 @@
 import { describe, expect } from "bun:test"
 import { State } from "@opencode-ai/core/state"
 import { Deferred, Effect, Exit, Fiber, Layer, Scope } from "effect"
+import { TestClock } from "effect/testing"
 import { testEffect } from "./lib/effect"
 
 const it = testEffect(Layer.empty)
@@ -51,7 +52,9 @@ describe("State", () => {
       expect(state.get().values).toEqual(["first"])
 
       value = "second"
-      yield* state.reload()
+      const reload = yield* state.reload().pipe(Effect.forkChild({ startImmediately: true }))
+      yield* TestClock.adjust("500 millis")
+      yield* Fiber.join(reload)
       expect(state.get().values).toEqual(["second"])
     }),
   )
@@ -112,4 +115,30 @@ describe("State", () => {
       expect(finalized).toBe(2)
     }),
   )
+
+  it.effect("debounces reload bursts", () =>
+    Effect.gen(function* () {
+      let finalized = 0
+      const state = State.create({
+        initial: () => ({ values: [] as string[] }),
+        draft: (draft) => ({ add: (item: string) => draft.values.push(item) }),
+        finalize: () => Effect.sync(() => finalized++),
+      })
+      yield* state.transform((draft) => {
+        draft.add("value")
+      })
+      finalized = 0
+
+      const first = yield* state.reload().pipe(Effect.forkChild({ startImmediately: true }))
+      yield* TestClock.adjust("250 millis")
+      const second = yield* state.reload().pipe(Effect.forkChild({ startImmediately: true }))
+      yield* TestClock.adjust("499 millis")
+      expect(finalized).toBe(0)
+      yield* TestClock.adjust("1 millis")
+      yield* Fiber.join(first)
+      yield* Fiber.join(second)
+
+      expect(finalized).toBe(1)
+    }),
+  )
 })