Add Effect-native core event system (#27415)

packages/core/test/catalog.test.ts

@@ -1,14 +1,21 @@
 import { describe, expect } from "bun:test"
-import { DateTime, Effect, Layer, Option } from "effect"
+import { DateTime, Effect, Fiber, Layer, Option, Stream } from "effect"
 import { Catalog } from "@opencode-ai/core/catalog"
-import { Instance } from "@opencode-ai/core/instance"
+import { EventV2 } from "@opencode-ai/core/event"
+import { Location } from "@opencode-ai/core/location"
 import { ModelV2 } from "@opencode-ai/core/model"
 import { PluginV2 } from "@opencode-ai/core/plugin"
 import { ProviderV2 } from "@opencode-ai/core/provider"
 import { testEffect } from "./lib/effect"
 
-const instanceLayer = Layer.succeed(Instance.Service, Instance.Service.of({ directory: "test" }))
-const it = testEffect(Catalog.layer.pipe(Layer.provideMerge(PluginV2.defaultLayer), Layer.provide(instanceLayer)))
+const locationLayer = Layer.succeed(Location.Service, Location.Service.of({ directory: "test" }))
+const it = testEffect(
+  Catalog.layer.pipe(
+    Layer.provideMerge(EventV2.defaultLayer),
+    Layer.provideMerge(PluginV2.defaultLayer),
+    Layer.provideMerge(locationLayer),
+  ),
+)
 
 describe("CatalogV2", () => {
   it.effect("normalizes provider baseURL into endpoint url", () =>
@@ -69,6 +76,31 @@ describe("CatalogV2", () => {
     }),
   )
 
+  it.effect("publishes model updated events", () =>
+    Effect.gen(function* () {
+      const catalog = yield* Catalog.Service
+      const events = yield* EventV2.Service
+      const providerID = ProviderV2.ID.make("test")
+      const modelID = ModelV2.ID.make("model")
+      const fiber = yield* events
+        .subscribe(Catalog.Event.ModelUpdated)
+        .pipe(Stream.take(1), Stream.runCollect, Effect.forkScoped)
+
+      yield* Effect.yieldNow
+      yield* catalog.provider.update(providerID, () => {})
+      yield* catalog.model.update(providerID, modelID, (model) => {
+        model.name = "Updated Model"
+      })
+      const event = Array.from(yield* Fiber.join(fiber))[0]
+
+      expect(event?.type).toBe("catalog.model.updated")
+      expect(event?.data.model.providerID).toBe(providerID)
+      expect(event?.data.model.id).toBe(modelID)
+      expect(event?.data.model.name).toBe("Updated Model")
+      expect(event?.location).toEqual({ directory: "test" })
+    }),
+  )
+
   it.effect("resolves unknown model endpoint from provider endpoint", () =>
     Effect.gen(function* () {
       const catalog = yield* Catalog.Service

packages/core/test/event.test.ts

@@ -0,0 +1,133 @@
+import { describe, expect } from "bun:test"
+import { Effect, Fiber, Layer, Schema, Stream } from "effect"
+import { EventV2 } from "@opencode-ai/core/event"
+import { Location } from "@opencode-ai/core/location"
+import { testEffect } from "./lib/effect"
+
+const locationLayer = Layer.succeed(
+  Location.Service,
+  Location.Service.of({ directory: "project", workspaceID: "workspace" }),
+)
+const it = testEffect(EventV2.layer.pipe(Layer.provideMerge(locationLayer)))
+const itWithoutLocation = testEffect(EventV2.layer)
+
+const Message = EventV2.define({
+  type: "test.message",
+  schema: {
+    text: Schema.String,
+  },
+})
+
+const GlobalMessage = EventV2.define({
+  type: "test.global",
+  schema: {
+    text: Schema.String,
+  },
+})
+
+const VersionedMessage = EventV2.define({
+  type: "test.versioned",
+  version: 2,
+  schema: {
+    text: Schema.String,
+  },
+})
+
+describe("EventV2", () => {
+  it.effect("publishes events with the current location", () =>
+    Effect.gen(function* () {
+      const events = yield* EventV2.Service
+      const fiber = yield* events.subscribe(Message).pipe(Stream.take(1), Stream.runCollect, Effect.forkScoped)
+      yield* Effect.yieldNow
+      const event = yield* events.publish(Message, { text: "hello" })
+      const received = Array.from(yield* Fiber.join(fiber))
+
+      expect(received).toEqual([event])
+      expect(event.type).toBe("test.message")
+      expect(event).not.toHaveProperty("version")
+      expect(event.data).toEqual({ text: "hello" })
+      expect(event.location).toEqual({ directory: "project", workspaceID: "workspace" })
+    }),
+  )
+
+  itWithoutLocation.effect("omits location when no location is available", () =>
+    Effect.gen(function* () {
+      const events = yield* EventV2.Service
+      const event = yield* events.publish(GlobalMessage, { text: "hello" })
+
+      expect(event).not.toHaveProperty("location")
+      expect(event.type).toBe("test.global")
+    }),
+  )
+
+  it.effect("publishes definition version", () =>
+    Effect.gen(function* () {
+      const events = yield* EventV2.Service
+      const event = yield* events.publish(VersionedMessage, { text: "hello" })
+
+      expect(event.type).toBe("test.versioned")
+      expect(event.version).toBe(2)
+    }),
+  )
+
+  it.effect("stores definitions in the exported registry", () =>
+    Effect.sync(() => {
+      expect(EventV2.registry.get(Message.type)).toBe(Message)
+    }),
+  )
+
+  it.effect("publishes to typed and wildcard subscriptions", () =>
+    Effect.gen(function* () {
+      const events = yield* EventV2.Service
+      const typed = yield* events.subscribe(Message).pipe(Stream.take(1), Stream.runCollect, Effect.forkScoped)
+      const wildcard = yield* events.all().pipe(Stream.take(1), Stream.runCollect, Effect.forkScoped)
+      yield* Effect.yieldNow
+      const event = yield* events.publish(Message, { text: "hello" })
+
+      expect(Array.from(yield* Fiber.join(typed))).toEqual([event])
+      expect(Array.from(yield* Fiber.join(wildcard))).toEqual([event])
+    }),
+  )
+
+  it.effect("runs sync handlers inline", () =>
+    Effect.gen(function* () {
+      const events = yield* EventV2.Service
+      const received = new Array<EventV2.Payload>()
+      const unsubscribe = yield* events.sync((event) =>
+        Effect.sync(() => {
+          received.push(event)
+        }),
+      )
+
+      const event = yield* events.publish(Message, { text: "hello" })
+      yield* unsubscribe
+      yield* events.publish(Message, { text: "after unsubscribe" })
+
+      expect(received).toEqual([event])
+    }),
+  )
+
+  it.effect("runs sync handlers before publishing to streams", () =>
+    Effect.gen(function* () {
+      const events = yield* EventV2.Service
+      const received = new Array<string>()
+      const fiber = yield* events.all().pipe(
+        Stream.take(1),
+        Stream.runForEach(() => Effect.sync(() => received.push("stream"))),
+        Effect.forkScoped,
+      )
+      yield* events.sync((event) =>
+        Effect.sync(() => {
+          received.push(event.type)
+        }),
+      )
+
+      yield* Effect.yieldNow
+      yield* events.publish(Message, { text: "hello" })
+      yield* Fiber.join(fiber)
+
+      expect(received).toEqual([Message.type, "stream"])
+    }),
+  )
+
+})

packages/core/test/plugin/provider-opencode.test.ts

@@ -1,7 +1,7 @@
 import { describe, expect } from "bun:test"
 import { DateTime, Effect, Layer, Option } from "effect"
 import { Catalog } from "@opencode-ai/core/catalog"
-import { Instance } from "@opencode-ai/core/instance"
+import { Location } from "@opencode-ai/core/location"
 import { ModelV2 } from "@opencode-ai/core/model"
 import { PluginV2 } from "@opencode-ai/core/plugin"
 import { OpencodePlugin } from "@opencode-ai/core/plugin/provider/opencode"
@@ -9,7 +9,7 @@ import { ProviderV2 } from "@opencode-ai/core/provider"
 import { it, model, provider, withEnv } from "./provider-helper"
 
 const cost = (input: number, output = 0) => [{ input, output, cache: { read: 0, write: 0 } }]
-const instanceLayer = Layer.succeed(Instance.Service, Instance.Service.of({ directory: "test" }))
+const locationLayer = Layer.succeed(Location.Service, Location.Service.of({ directory: "test" }))
 
 describe("OpencodePlugin", () => {
   it.effect("uses a public key and cancels paid models without credentials", () =>
@@ -192,6 +192,6 @@ describe("OpencodePlugin", () => {
       const selected = yield* catalog.model.small(providerID)
 
       expect(Option.getOrUndefined(selected)?.id).toBe(ModelV2.ID.make("gpt-5-nano"))
-    }).pipe(Effect.provide(Catalog.defaultLayer.pipe(Layer.provide(instanceLayer)))),
+    }).pipe(Effect.provide(Catalog.defaultLayer.pipe(Layer.provide(locationLayer)))),
   )
 })