refactor(core): replace background job service (#34559)

packages/core/test/tool-subagent.test.ts

@@ -10,7 +10,7 @@ import { ModelV2 } from "@opencode-ai/core/model"
 import { ProviderV2 } from "@opencode-ai/core/provider"
 import { AbsolutePath } from "@opencode-ai/core/schema"
 import { AgentV2 } from "@opencode-ai/core/agent"
-import { BackgroundJob } from "@opencode-ai/core/background-job"
+import { Job } from "@opencode-ai/core/job"
 import { LocationServiceMap } from "@opencode-ai/core/location-service-map"
 import { SessionV2 } from "@opencode-ai/core/session"
 import { SessionEvent } from "@opencode-ai/core/session/event"
@@ -95,7 +95,7 @@ const layer = AppNodeBuilder.build(
     LayerNode.group([
       Database.node,
       EventV2.node,
-      BackgroundJob.node,
+      Job.node,
       ToolOutputStore.cleanupNode,
       SessionV2.node,
       SubagentTool.node,
@@ -242,7 +242,7 @@ describe("SubagentTool", () => {
     ),
   )
 
-  it.live("promotes background work and injects one synthetic parent completion", () =>
+  it.live("notifies once when background work completes", () =>
     Effect.acquireRelease(
       Effect.promise(() => tmpdir()),
       (dir) => Effect.promise(() => dir[Symbol.asyncDispose]()),
@@ -251,7 +251,6 @@ describe("SubagentTool", () => {
         Effect.gen(function* () {
           const location = Location.Ref.make({ directory: AbsolutePath.make(dir.path) })
           const sessions = yield* SessionV2.Service
-          const jobs = yield* BackgroundJob.Service
           const parent = yield* sessions.create({ location })
           yield* withSubagent(parent.location)
           const locations = yield* LocationServiceMap.Service
@@ -270,7 +269,6 @@ describe("SubagentTool", () => {
           const childID = outputSessionID(settled.output?.structured)
           expect(settled.output?.structured).toMatchObject({ status: "running" })
 
-          yield* jobs.promote(childID)
           yield* Effect.yieldNow
           const synthetic = (yield* sessions.context(parent.id)).filter((message) => message.type === "synthetic")
           expect(synthetic).toHaveLength(1)