diff --git a/Cargo.lock b/Cargo.lock
index b29c151..b7ba63d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1403,7 +1403,7 @@ dependencies = [
 [[package]]
 name = "collections"
 version = "0.1.0"
-source = "git+https://github.com/Kuddev/zed?rev=7c662384cd77c1d1e1566206920e3a420ea6767b#7c662384cd77c1d1e1566206920e3a420ea6767b"
+source = "git+https://github.com/Kuddev/zed?rev=fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4#fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4"
 dependencies = [
  "gpui_util",
  "indexmap",
@@ -2013,7 +2013,7 @@ dependencies = [
 [[package]]
 name = "derive_refineable"
 version = "0.1.0"
-source = "git+https://github.com/Kuddev/zed?rev=7c662384cd77c1d1e1566206920e3a420ea6767b#7c662384cd77c1d1e1566206920e3a420ea6767b"
+source = "git+https://github.com/Kuddev/zed?rev=fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4#fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -3105,7 +3105,7 @@ dependencies = [
 [[package]]
 name = "gpui"
 version = "0.2.2"
-source = "git+https://github.com/Kuddev/zed?rev=7c662384cd77c1d1e1566206920e3a420ea6767b#7c662384cd77c1d1e1566206920e3a420ea6767b"
+source = "git+https://github.com/Kuddev/zed?rev=fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4#fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4"
 dependencies = [
  "accesskit",
  "anyhow",
@@ -3191,7 +3191,7 @@ dependencies = [
 [[package]]
 name = "gpui-component"
 version = "0.5.2"
-source = "git+https://github.com/Kuddev/gpui-component?rev=f46ecbb06de5907af9700f3f6e2b5b0845459188#f46ecbb06de5907af9700f3f6e2b5b0845459188"
+source = "git+https://github.com/Kuddev/gpui-component?rev=fc5f5cf63dd80686dafacd2a6e37345bbd1dc7ba#fc5f5cf63dd80686dafacd2a6e37345bbd1dc7ba"
 dependencies = [
  "aho-corasick",
  "anyhow",
@@ -3274,7 +3274,7 @@ dependencies = [
 [[package]]
 name = "gpui-component-assets"
 version = "0.5.1"
-source = "git+https://github.com/Kuddev/gpui-component?rev=f46ecbb06de5907af9700f3f6e2b5b0845459188#f46ecbb06de5907af9700f3f6e2b5b0845459188"
+source = "git+https://github.com/Kuddev/gpui-component?rev=fc5f5cf63dd80686dafacd2a6e37345bbd1dc7ba#fc5f5cf63dd80686dafacd2a6e37345bbd1dc7ba"
 dependencies = [
  "anyhow",
  "gpui",
@@ -3288,7 +3288,7 @@ dependencies = [
 [[package]]
 name = "gpui-component-macros"
 version = "0.5.1"
-source = "git+https://github.com/Kuddev/gpui-component?rev=f46ecbb06de5907af9700f3f6e2b5b0845459188#f46ecbb06de5907af9700f3f6e2b5b0845459188"
+source = "git+https://github.com/Kuddev/gpui-component?rev=fc5f5cf63dd80686dafacd2a6e37345bbd1dc7ba#fc5f5cf63dd80686dafacd2a6e37345bbd1dc7ba"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -3298,7 +3298,7 @@ dependencies = [
 [[package]]
 name = "gpui_linux"
 version = "0.1.0"
-source = "git+https://github.com/Kuddev/zed?rev=7c662384cd77c1d1e1566206920e3a420ea6767b#7c662384cd77c1d1e1566206920e3a420ea6767b"
+source = "git+https://github.com/Kuddev/zed?rev=fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4#fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4"
 dependencies = [
  "accesskit",
  "accesskit_unix",
@@ -3350,7 +3350,7 @@ dependencies = [
 [[package]]
 name = "gpui_macos"
 version = "0.1.0"
-source = "git+https://github.com/Kuddev/zed?rev=7c662384cd77c1d1e1566206920e3a420ea6767b#7c662384cd77c1d1e1566206920e3a420ea6767b"
+source = "git+https://github.com/Kuddev/zed?rev=fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4#fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4"
 dependencies = [
  "accesskit",
  "accesskit_macos",
@@ -3399,7 +3399,7 @@ dependencies = [
 [[package]]
 name = "gpui_macros"
 version = "0.1.0"
-source = "git+https://github.com/Kuddev/zed?rev=7c662384cd77c1d1e1566206920e3a420ea6767b#7c662384cd77c1d1e1566206920e3a420ea6767b"
+source = "git+https://github.com/Kuddev/zed?rev=fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4#fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4"
 dependencies = [
  "heck 0.5.0",
  "proc-macro2",
@@ -3410,7 +3410,7 @@ dependencies = [
 [[package]]
 name = "gpui_platform"
 version = "0.1.0"
-source = "git+https://github.com/Kuddev/zed?rev=7c662384cd77c1d1e1566206920e3a420ea6767b#7c662384cd77c1d1e1566206920e3a420ea6767b"
+source = "git+https://github.com/Kuddev/zed?rev=fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4#fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4"
 dependencies = [
  "console_error_panic_hook",
  "gpui",
@@ -3423,7 +3423,7 @@ dependencies = [
 [[package]]
 name = "gpui_shared_string"
 version = "0.1.0"
-source = "git+https://github.com/Kuddev/zed?rev=7c662384cd77c1d1e1566206920e3a420ea6767b#7c662384cd77c1d1e1566206920e3a420ea6767b"
+source = "git+https://github.com/Kuddev/zed?rev=fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4#fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4"
 dependencies = [
  "schemars",
  "serde",
@@ -3433,7 +3433,7 @@ dependencies = [
 [[package]]
 name = "gpui_util"
 version = "0.1.0"
-source = "git+https://github.com/Kuddev/zed?rev=7c662384cd77c1d1e1566206920e3a420ea6767b#7c662384cd77c1d1e1566206920e3a420ea6767b"
+source = "git+https://github.com/Kuddev/zed?rev=fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4#fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4"
 dependencies = [
  "anyhow",
  "log",
@@ -3443,7 +3443,7 @@ dependencies = [
 [[package]]
 name = "gpui_web"
 version = "0.1.0"
-source = "git+https://github.com/Kuddev/zed?rev=7c662384cd77c1d1e1566206920e3a420ea6767b#7c662384cd77c1d1e1566206920e3a420ea6767b"
+source = "git+https://github.com/Kuddev/zed?rev=fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4#fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4"
 dependencies = [
  "anyhow",
  "console_error_panic_hook",
@@ -3466,7 +3466,7 @@ dependencies = [
 [[package]]
 name = "gpui_wgpu"
 version = "0.1.0"
-source = "git+https://github.com/Kuddev/zed?rev=7c662384cd77c1d1e1566206920e3a420ea6767b#7c662384cd77c1d1e1566206920e3a420ea6767b"
+source = "git+https://github.com/Kuddev/zed?rev=fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4#fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4"
 dependencies = [
  "anyhow",
  "bytemuck",
@@ -3496,7 +3496,7 @@ dependencies = [
 [[package]]
 name = "gpui_windows"
 version = "0.1.0"
-source = "git+https://github.com/Kuddev/zed?rev=7c662384cd77c1d1e1566206920e3a420ea6767b#7c662384cd77c1d1e1566206920e3a420ea6767b"
+source = "git+https://github.com/Kuddev/zed?rev=fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4#fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4"
 dependencies = [
  "accesskit",
  "accesskit_windows",
@@ -3792,7 +3792,7 @@ dependencies = [
 [[package]]
 name = "http_client"
 version = "0.1.0"
-source = "git+https://github.com/Kuddev/zed?rev=7c662384cd77c1d1e1566206920e3a420ea6767b#7c662384cd77c1d1e1566206920e3a420ea6767b"
+source = "git+https://github.com/Kuddev/zed?rev=fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4#fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4"
 dependencies = [
  "anyhow",
  "async-compression",
@@ -4754,7 +4754,7 @@ checksum = "7ebb8d8732c6a6df3d8f032a82911cfc747e00efb95cc46e8d0acd5b5b88570c"
 [[package]]
 name = "media"
 version = "0.1.0"
-source = "git+https://github.com/Kuddev/zed?rev=7c662384cd77c1d1e1566206920e3a420ea6767b#7c662384cd77c1d1e1566206920e3a420ea6767b"
+source = "git+https://github.com/Kuddev/zed?rev=fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4#fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4"
 dependencies = [
  "anyhow",
  "bindgen",
@@ -6175,7 +6175,7 @@ checksum = "9b4f627cb1b25917193a259e49bdad08f671f8d9708acfd5fe0a8c1455d87220"
 [[package]]
 name = "perf"
 version = "0.1.0"
-source = "git+https://github.com/Kuddev/zed?rev=7c662384cd77c1d1e1566206920e3a420ea6767b#7c662384cd77c1d1e1566206920e3a420ea6767b"
+source = "git+https://github.com/Kuddev/zed?rev=fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4#fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4"
 dependencies = [
  "collections",
  "serde",
@@ -7074,7 +7074,7 @@ dependencies = [
 [[package]]
 name = "refineable"
 version = "0.1.0"
-source = "git+https://github.com/Kuddev/zed?rev=7c662384cd77c1d1e1566206920e3a420ea6767b#7c662384cd77c1d1e1566206920e3a420ea6767b"
+source = "git+https://github.com/Kuddev/zed?rev=fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4#fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4"
 dependencies = [
  "derive_refineable",
 ]
@@ -7669,7 +7669,7 @@ dependencies = [
 [[package]]
 name = "scheduler"
 version = "0.1.0"
-source = "git+https://github.com/Kuddev/zed?rev=7c662384cd77c1d1e1566206920e3a420ea6767b#7c662384cd77c1d1e1566206920e3a420ea6767b"
+source = "git+https://github.com/Kuddev/zed?rev=fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4#fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4"
 dependencies = [
  "async-task",
  "backtrace",
@@ -8512,7 +8512,7 @@ checksum = "13c2bddecc57b384dee18652358fb23172facb8a2c51ccc10d74c157bdea3292"
 [[package]]
 name = "sum_tree"
 version = "0.1.0"
-source = "git+https://github.com/Kuddev/zed?rev=7c662384cd77c1d1e1566206920e3a420ea6767b#7c662384cd77c1d1e1566206920e3a420ea6767b"
+source = "git+https://github.com/Kuddev/zed?rev=fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4#fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4"
 dependencies = [
  "heapless",
  "log",
@@ -9838,7 +9838,7 @@ checksum = "06abde3611657adf66d383f00b093d7faecc7fa57071cce2578660c9f1010821"
 [[package]]
 name = "util_macros"
 version = "0.1.0"
-source = "git+https://github.com/Kuddev/zed?rev=7c662384cd77c1d1e1566206920e3a420ea6767b#7c662384cd77c1d1e1566206920e3a420ea6767b"
+source = "git+https://github.com/Kuddev/zed?rev=fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4#fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4"
 dependencies = [
  "perf",
  "quote",
@@ -11702,7 +11702,7 @@ dependencies = [
 [[package]]
 name = "zlog"
 version = "0.1.0"
-source = "git+https://github.com/Kuddev/zed?rev=7c662384cd77c1d1e1566206920e3a420ea6767b#7c662384cd77c1d1e1566206920e3a420ea6767b"
+source = "git+https://github.com/Kuddev/zed?rev=fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4#fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4"
 dependencies = [
  "anyhow",
  "chrono",
@@ -11719,7 +11719,7 @@ checksum = "29666d0abbfad1e3dc4dcf6144730dd3a3ab225bbbdac83319345b1b44ccfc1b"
 [[package]]
 name = "ztracing"
 version = "0.1.0"
-source = "git+https://github.com/Kuddev/zed?rev=7c662384cd77c1d1e1566206920e3a420ea6767b#7c662384cd77c1d1e1566206920e3a420ea6767b"
+source = "git+https://github.com/Kuddev/zed?rev=fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4#fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4"
 dependencies = [
  "tracing",
  "tracing-subscriber",
@@ -11730,7 +11730,7 @@ dependencies = [
 [[package]]
 name = "ztracing_macro"
 version = "0.1.0"
-source = "git+https://github.com/Kuddev/zed?rev=7c662384cd77c1d1e1566206920e3a420ea6767b#7c662384cd77c1d1e1566206920e3a420ea6767b"
+source = "git+https://github.com/Kuddev/zed?rev=fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4#fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4"
 
 [[package]]
 name = "zune-core"
diff --git a/Cargo.toml b/Cargo.toml
index 51a904a..85cbe90 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -70,7 +70,7 @@ toml_edit = "0.24.0"
 # GPUI v1.16.1 把平台启动入口拆到独立 crate。它必须与 `gpui` 使用完全相同
 # 的 Git URL 和 rev，否则 Cargo 会把同名类型解析成两套互不兼容的 crate。
 # Without font-kit, the macOS platform uses NoopTextSystem and renders no text.
-gpui_platform = { git = "https://github.com/Kuddev/zed", rev = "7c662384cd77c1d1e1566206920e3a420ea6767b", version = "=0.1.0", features = ["font-kit"] }
+gpui_platform = { git = "https://github.com/Kuddev/zed", rev = "fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4", version = "=0.1.0", features = ["font-kit"] }
 
 # TODO: Drop this pin and return to the crates.io release once the fix ships there.
 [patch.crates-io]
@@ -182,10 +182,13 @@ winit = { path = "third_party/winit-0.30.13" }
 #      tests/root_test_window.rs 验证以依赖方式编译的 Root 可使用虚拟窗口；
 #      上游提供等价的下游 headless 测试支持后撤销本补丁。
 #
-# 当前精确引用包含补丁 1-3、6 及字体内存修补；Input 补丁 4-5 仍保持独立。
-gpui = { git = "https://github.com/Kuddev/zed", rev = "7c662384cd77c1d1e1566206920e3a420ea6767b", version = "=0.2.2" }
+# 当前精确引用包含补丁 1-3、6、字体内存修补及 Windows 彩色 emoji 枚举修复。
+# DirectWrite 必须先 MoveNext 再 GetCurrentRun，否则回退为黑色字形（issue #317）。
+# 修复来源：WilliamWang1721/zed codex/issue-317-color-emoji；维护分支吸收后改回其固定点。
+# Input 补丁 4-5 仍保持独立。
+gpui = { git = "https://github.com/Kuddev/zed", rev = "fc05d637cc7029d75de051fd7f52c1a0fb8fa6b4", version = "=0.2.2" }
 # Native inputs share rendered text's device-pixel line height and expose a
 # post-paint point lookup. Window selection ends on release even when a child
 # consumes MouseUp or the platform reports the next move without a held button.
-gpui-component = { git = "https://github.com/Kuddev/gpui-component", rev = "f46ecbb06de5907af9700f3f6e2b5b0845459188", version = "=0.5.2" }
-gpui-component-assets = { git = "https://github.com/Kuddev/gpui-component", rev = "f46ecbb06de5907af9700f3f6e2b5b0845459188", version = "=0.5.1" }
+gpui-component = { git = "https://github.com/Kuddev/gpui-component", rev = "fc5f5cf63dd80686dafacd2a6e37345bbd1dc7ba", version = "=0.5.2" }
+gpui-component-assets = { git = "https://github.com/Kuddev/gpui-component", rev = "fc5f5cf63dd80686dafacd2a6e37345bbd1dc7ba", version = "=0.5.1" }
diff --git a/nebula_gpui/ARCHITECTURE.md b/nebula_gpui/ARCHITECTURE.md
index a65d472..b730d68 100644
--- a/nebula_gpui/ARCHITECTURE.md
+++ b/nebula_gpui/ARCHITECTURE.md
@@ -68,8 +68,11 @@ application boundary.
 
 ## Dependency Policy
 
-The v1.16.1 migration baseline is pinned by both package version and immutable
-Git revision:
+The v1.16.1 migration baseline was pinned by both package version and immutable
+Git revision. The revisions below record that historical migration, not the
+active dependency pins. Current revisions and patch rationale are maintained
+in the root [`Cargo.toml`](../Cargo.toml), with resolution in
+[`Cargo.lock`](../Cargo.lock):
 
 ```toml
 gpui = "=0.2.2"
diff --git a/nebula_hook/tests/lifetime.rs b/nebula_hook/tests/lifetime.rs
index 925f9ae..a4725c8 100644
--- a/nebula_hook/tests/lifetime.rs
+++ b/nebula_hook/tests/lifetime.rs
@@ -90,9 +90,11 @@ fn legacy_notify_still_invokes_the_users_chained_program() {
     );
 }
 
+/// A server-side named pipe in the exact state the live transport can leave
+/// behind during shutdown: created, never accepted and never drained. The
+/// default harness runs tests in one process, so every name must be unique.
 #[cfg(windows)]
-#[test]
-fn a_receiver_that_never_reads_cannot_pin_the_helper() {
+mod stalled_receiver {
     use std::ffi::c_void;
 
     #[link(name = "kernel32")]
@@ -110,28 +112,50 @@ fn a_receiver_that_never_reads_cannot_pin_the_helper() {
         fn CloseHandle(handle: *mut c_void) -> i32;
         fn GetNamedPipeClientProcessId(handle: *mut c_void, pid: *mut u32) -> i32;
     }
-    struct Pipe(*mut c_void);
-    impl Drop for Pipe {
+
+    pub struct Receiver(*mut c_void);
+
+    impl Receiver {
+        /// mode 1 = PIPE_ACCESS_INBOUND, one instance: mirrors the live
+        /// transport's one-client-at-a-time shape.
+        pub fn create(discriminator: &str) -> (Self, String) {
+            let name = format!(r"\\.\pipe\pebrel-hook-lifetime-test-{discriminator}");
+            let wide: Vec<u16> = name.encode_utf16().chain(Some(0)).collect();
+            let handle = unsafe {
+                CreateNamedPipeW(wide.as_ptr(), 1, 0, 1, 4096, 4096, 0, std::ptr::null())
+            };
+            assert_ne!(handle as isize, -1, "{}", std::io::Error::last_os_error());
+            (Self(handle), name)
+        }
+
+        /// Kernel answer to "did this process connect?" — the same identity
+        /// probe the live transport issues for every accepted client.
+        pub fn connected_client(&self) -> Option<u32> {
+            let mut pid = 0;
+            let ok = unsafe { GetNamedPipeClientProcessId(self.0, &mut pid) };
+            (ok != 0 && pid != 0).then_some(pid)
+        }
+    }
+
+    impl Drop for Receiver {
         fn drop(&mut self) {
             unsafe {
                 CloseHandle(self.0);
             }
         }
     }
-    let name = format!(r"\\.\pipe\pebrel-hook-lifetime-test-{}", std::process::id());
-    let wide: Vec<u16> = name.encode_utf16().chain(Some(0)).collect();
-    // The server owns an inbound byte pipe and deliberately never drains it.
-    let handle =
-        unsafe { CreateNamedPipeW(wide.as_ptr(), 1, 0, 1, 4096, 4096, 0, std::ptr::null()) };
-    assert_ne!(handle as isize, -1, "{}", std::io::Error::last_os_error());
-    let _pipe = Pipe(handle);
+}
+
+#[cfg(windows)]
+#[test]
+fn a_receiver_that_never_reads_cannot_pin_the_helper() {
+    let (receiver, name) = stalled_receiver::Receiver::create("codex-argv");
     let payload = "x".repeat(16 * 1024);
     let invocation = Invocation::spawn(&["codex", &payload], Some(&name));
     let deadline = Instant::now() + Duration::from_secs(6);
     loop {
-        let mut pid = 0;
-        if unsafe { GetNamedPipeClientProcessId(handle, &mut pid) } != 0 {
-            assert_eq!(pid, invocation.0.as_ref().unwrap().id());
+        if receiver.connected_client().is_some_and(|pid| pid == invocation.0.as_ref().unwrap().id())
+        {
             break;
         }
         assert!(Instant::now() < deadline, "helper never connected to the blocked receiver");
@@ -140,3 +164,44 @@ fn a_receiver_that_never_reads_cannot_pin_the_helper() {
     let output = invocation.finish();
     assert!(output.stdout.is_empty() && output.stderr.is_empty());
 }
+
+/// Issue #259: Pi's extension launches `pebrel-hook pi <prompt-json>` as a
+/// detached Windows process and never reaps it, so a prompt burst can
+/// outlive its host. The padded context field exceeds the receiver's buffer,
+/// pinning the first connect mid-write — the stalled-write condition the
+/// forwarding deadline exists for.
+#[cfg(windows)]
+#[test]
+fn concurrent_pi_prompt_notifications_exit_against_a_wedged_receiver() {
+    let (receiver, name) = stalled_receiver::Receiver::create("pi-burst");
+    let prompt = |session: u32| {
+        format!(
+            r#"{{"kind":"prompt","session_id":"s-{session}","bridge_instance":"5c1e","bridge_sequence":"{session}","event_id":"5c1e:{session}","cwd":"C:\\Users\\dev\\project","context":"{}"}}"#,
+            "x".repeat(16 * 1024),
+        )
+    };
+    let pending: Vec<_> =
+        (1..=5).map(|session| Invocation::spawn(&["pi", &prompt(session)], Some(&name))).collect();
+    // The wedged receiver pins whichever helper connects first mid-write, so
+    // that connection stays observable until the deadline retires the helper.
+    let deadline = Instant::now() + Duration::from_secs(6);
+    loop {
+        if receiver.connected_client().is_some() {
+            break;
+        }
+        assert!(Instant::now() < deadline, "no pi prompt helper connected to the wedged receiver");
+        std::thread::sleep(Duration::from_millis(10));
+    }
+    for invocation in pending {
+        let output = invocation.finish();
+        assert!(output.stdout.is_empty() && output.stderr.is_empty());
+    }
+}
+
+#[test]
+fn pi_prompt_notification_exits_cleanly_without_a_host() {
+    let invocation =
+        Invocation::spawn(&["pi", r#"{"kind":"prompt","session_id":"s1","cwd":"/tmp"}"#], None);
+    let output = invocation.finish();
+    assert!(output.stdout.is_empty() && output.stderr.is_empty());
+}