From 9e5108af501c65d1591b6f17da29fd7b5af28e31 Mon Sep 17 00:00:00 2001
From: Brennan Benson <79079362+brennanb2025@users.noreply.github.com>
Date: Fri, 2 Oct 2026 02:42:58 -0700
Subject: [PATCH 1/2] fix(agent-launch): keep the local socket alive while a
 prompted launch waits for its agent

A launch with a prompt now waits up to 60 s for the terminal agent to be
ready before it writes the prompt, and reports not-delivered when the agent
never is. The local runtime socket closes a connection idle for 30 s unless
the request is a long poll, so a launch whose agent exited at startup lost its
reply and the caller saw 'runtime closed the connection' instead of
not-delivered. Classify a prompted agent.launch and agent.launchReplay as a
long poll, as orchestration.workerStart already is for the same wait.
---
 .../runtime-rpc-long-poll-transport.test.ts   | 19 +++++++++++++++++++
 .../runtime-rpc/runtime-rpc-long-poll.ts      | 10 ++++++++++
 2 files changed, 29 insertions(+)

diff --git a/src/main/runtime/runtime-rpc-long-poll-transport.test.ts b/src/main/runtime/runtime-rpc-long-poll-transport.test.ts
index c17e045b466..c23b4e6b28b 100644
--- a/src/main/runtime/runtime-rpc-long-poll-transport.test.ts
+++ b/src/main/runtime/runtime-rpc-long-poll-transport.test.ts
@@ -44,6 +44,25 @@ describe('OrcaRuntimeRpcServer', () => {
     ).toBe('wait')
   })
 
+  it.each(['agent.launch', 'agent.launchReplay'])(
+    'keeps a prompted %s alive while it waits for the agent to be ready',
+    (method) => {
+      const prompt = { text: 'fix the build', delivery: 'submit' }
+      expect(
+        classifyRuntimeLongPoll({
+          id: 'req_launch',
+          authToken: 'token',
+          method,
+          params: { prompt }
+        })
+      ).toBe('wait')
+      // Without a prompt nothing waits on the agent, so the launch stays a short call.
+      expect(
+        classifyRuntimeLongPoll({ id: 'req_launch', authToken: 'token', method, params: {} })
+      ).toBeNull()
+    }
+  )
+
   it('keeps agent-prompt submission sockets alive during verification', () => {
     expect(
       classifyRuntimeLongPoll({
diff --git a/src/main/runtime/runtime-rpc/runtime-rpc-long-poll.ts b/src/main/runtime/runtime-rpc/runtime-rpc-long-poll.ts
index 02d8422547e..15fc3af44f2 100644
--- a/src/main/runtime/runtime-rpc/runtime-rpc-long-poll.ts
+++ b/src/main/runtime/runtime-rpc/runtime-rpc-long-poll.ts
@@ -26,6 +26,16 @@ export function classifyRuntimeLongPoll(request: RpcRequest): RuntimeLongPollCla
   if (request.method === 'orchestration.workerStart') {
     return 'wait'
   }
+  // A launch with a prompt waits for the agent's readiness before writing it, up to 60 s, and a
+  // reply lost to the 30 s idle timer reads as a dead runtime instead of an undelivered prompt.
+  if (
+    (request.method === 'agent.launch' || request.method === 'agent.launchReplay') &&
+    typeof request.params === 'object' &&
+    request.params !== null &&
+    (request.params as { prompt?: unknown }).prompt !== undefined
+  ) {
+    return 'wait'
+  }
   if (request.method === 'browser.clientHost.attach') {
     return 'browser-host'
   }

From c9b4dc0578c3ff7dea91facdf71859140554abdd Mon Sep 17 00:00:00 2001
From: Brennan Benson <79079362+brennanb2025@users.noreply.github.com>
Date: Fri, 2 Oct 2026 02:44:11 -0700
Subject: [PATCH 2/2] refactor(agent-launch): narrow the launch params by 'in'
 instead of a cast

---
 src/main/runtime/runtime-rpc/runtime-rpc-long-poll.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/main/runtime/runtime-rpc/runtime-rpc-long-poll.ts b/src/main/runtime/runtime-rpc/runtime-rpc-long-poll.ts
index 15fc3af44f2..c1ddeb78a6e 100644
--- a/src/main/runtime/runtime-rpc/runtime-rpc-long-poll.ts
+++ b/src/main/runtime/runtime-rpc/runtime-rpc-long-poll.ts
@@ -32,7 +32,8 @@ export function classifyRuntimeLongPoll(request: RpcRequest): RuntimeLongPollCla
     (request.method === 'agent.launch' || request.method === 'agent.launchReplay') &&
     typeof request.params === 'object' &&
     request.params !== null &&
-    (request.params as { prompt?: unknown }).prompt !== undefined
+    'prompt' in request.params &&
+    request.params.prompt !== undefined
   ) {
     return 'wait'
   }