refactor(acp): extract runtime reentry (#27769)

packages/opencode/src/acp/runtime.ts

@@ -0,0 +1,22 @@
+import { Agent } from "@/agent/agent"
+import { AppRuntime, type AppServices } from "@/effect/app-runtime"
+import { InstanceRef } from "@/effect/instance-ref"
+import { InstanceRuntime } from "@/project/instance-runtime"
+import { Effect } from "effect"
+
+// Global ACP Effect re-entry: no project InstanceRef is provided.
+export const runGlobal = AppRuntime.runPromise
+
+// Directory-scoped ACP Effect re-entry: load the project instance and provide InstanceRef.
+export async function runDirectory<A, E>(input: { directory: string; effect: Effect.Effect<A, E, AppServices> }) {
+  const ctx = await InstanceRuntime.load({ directory: input.directory })
+  return AppRuntime.runPromise(input.effect.pipe(Effect.provideService(InstanceRef, ctx)))
+}
+
+export const defaultAgentInfo = (directory: string) =>
+  runDirectory({
+    directory,
+    effect: Agent.Service.use((svc) => svc.defaultInfo()),
+  })
+
+export * as ACPRuntime from "./runtime"