diff --git a/packages/cli/src/node/index.ts b/packages/cli/src/node/index.ts
index b7bb7db5414..3559a614ca1 100644
--- a/packages/cli/src/node/index.ts
+++ b/packages/cli/src/node/index.ts
@@ -1,3 +1,9 @@
 import "./plugin-runtime.promise"
 import "./plugin-runtime.effect"
-import "../index"
+
+process.stdout.on("error", (error) => {
+  if ("code" in error && error.code === "EPIPE") return
+  throw error
+})
+
+await import("../index")
diff --git a/packages/cli/src/services/standalone.ts b/packages/cli/src/services/standalone.ts
index 273cccbf495..d1ea7fc9c57 100644
--- a/packages/cli/src/services/standalone.ts
+++ b/packages/cli/src/services/standalone.ts
@@ -1,7 +1,7 @@
 import { Service, type Endpoint } from "@opencode-ai/client/effect/service"
 import { CrossSpawnSpawner } from "@opencode-ai/core/cross-spawn-spawner"
 import { AppNodeBuilder } from "@opencode-ai/core/effect/app-node-builder"
-import { Effect, Schema, Stream } from "effect"
+import { Deferred, Effect, Schema, Stream } from "effect"
 import { ChildProcess, ChildProcessSpawner } from "effect/unstable/process"
 import { randomBytes } from "node:crypto"
 import { selfCommand } from "../util/process"
@@ -36,8 +36,16 @@ const makeEndpoint = Effect.fn("cli.standalone.endpoint")(
     const password = randomBytes(32).toString("base64url")
     const spawner = yield* ChildProcessSpawner.ChildProcessSpawner
     const proc = yield* spawner.spawn(command(password, options))
-    const output = yield* proc.stdout.pipe(Stream.decodeText(), Stream.splitLines, Stream.take(1), Stream.mkString)
-    if (!output) return yield* Effect.fail(new Error("Standalone server exited before reporting readiness"))
+    const readyLine = yield* Deferred.make<string, Error>()
+    // Keep draining stdout after readiness so later server writes cannot hit EPIPE.
+    yield* proc.stdout.pipe(
+      Stream.decodeText(),
+      Stream.splitLines,
+      Stream.runForEach((line) => Deferred.succeed(readyLine, line)),
+      Effect.ensuring(Deferred.fail(readyLine, new Error("Standalone server exited before reporting readiness"))),
+      Effect.forkScoped,
+    )
+    const output = yield* Deferred.await(readyLine)
     const ready = yield* Effect.tryPromise(() => decodeReady(output))
     return {
       url: ready.url,