fix: preserve zsh-fork escalation fds in unified-exec PTYs

codex-rs/core/src/tools/runtimes/shell/zsh_fork_backend.rs

@@ -48,12 +48,23 @@ mod imp {
     use crate::unified_exec::SpawnLifecycle;
     use codex_shell_escalation::EscalationSession;
 
+    const ESCALATE_SOCKET_ENV_VAR: &str = "CODEX_ESCALATE_SOCKET";
+
     #[derive(Debug)]
     struct ZshForkSpawnLifecycle {
         escalation_session: EscalationSession,
     }
 
     impl SpawnLifecycle for ZshForkSpawnLifecycle {
+        fn inherited_fds(&self) -> Vec<std::os::fd::RawFd> {
+            self.escalation_session
+                .env()
+                .get(ESCALATE_SOCKET_ENV_VAR)
+                .and_then(|fd| fd.parse().ok())
+                .into_iter()
+                .collect()
+        }
+
         fn after_spawn(&mut self) {
             self.escalation_session.close_client_socket();
         }

codex-rs/core/src/unified_exec/process.rs

@@ -1,5 +1,6 @@
 #![allow(clippy::module_inception)]
 
+use std::os::fd::RawFd;
 use std::sync::Arc;
 use std::sync::atomic::AtomicBool;
 use std::sync::atomic::Ordering;
@@ -25,6 +26,10 @@ use super::UnifiedExecError;
 use super::head_tail_buffer::HeadTailBuffer;
 
 pub(crate) trait SpawnLifecycle: std::fmt::Debug + Send + Sync {
+    fn inherited_fds(&self) -> Vec<RawFd> {
+        Vec::new()
+    }
+
     fn after_spawn(&mut self) {}
 }
 

codex-rs/core/src/unified_exec/process_manager.rs

@@ -535,14 +535,16 @@ impl UnifiedExecProcessManager {
             .command
             .split_first()
             .ok_or(UnifiedExecError::MissingCommandLine)?;
+        let inherited_fds = spawn_lifecycle.inherited_fds();
 
         let spawn_result = if tty {
-            codex_utils_pty::pty::spawn_process(
+            codex_utils_pty::pty::spawn_process_with_inherited_fds(
                 program,
                 args,
                 env.cwd.as_path(),
                 &env.env,
                 &env.arg0,
+                &inherited_fds,
             )
             .await
         } else {