diff --git a/codex-rs/core/src/codex.rs b/codex-rs/core/src/codex.rs
index e759acb4..7004dcfc 100644
--- a/codex-rs/core/src/codex.rs
+++ b/codex-rs/core/src/codex.rs
@@ -396,11 +396,15 @@ impl Session {
         &self,
         sub_id: &str,
         call_id: &str,
-        stdout: &str,
-        stderr: &str,
-        exit_code: i32,
+        output: &ExecToolCallOutput,
         is_apply_patch: bool,
     ) {
+        let ExecToolCallOutput {
+            stdout,
+            stderr,
+            duration,
+            exit_code,
+        } = output;
         // Because stdout and stderr could each be up to 100 KiB, we send
         // truncated versions.
         const MAX_STREAM_OUTPUT: usize = 5 * 1024; // 5KiB
@@ -412,14 +416,15 @@ impl Session {
                 call_id: call_id.to_string(),
                 stdout,
                 stderr,
-                success: exit_code == 0,
+                success: *exit_code == 0,
             })
         } else {
             EventMsg::ExecCommandEnd(ExecCommandEndEvent {
                 call_id: call_id.to_string(),
                 stdout,
                 stderr,
-                exit_code,
+                duration: *duration,
+                exit_code: *exit_code,
             })
         };
 
@@ -1775,23 +1780,21 @@ async fn handle_container_exec_with_params(
                 stdout,
                 stderr,
                 duration,
-            } = output;
+            } = &output;
 
             sess.notify_exec_command_end(
                 &sub_id,
                 &call_id,
-                &stdout,
-                &stderr,
-                exit_code,
+                &output,
                 exec_command_context.apply_patch.is_some(),
             )
             .await;
 
-            let is_success = exit_code == 0;
+            let is_success = *exit_code == 0;
             let content = format_exec_output(
-                if is_success { &stdout } else { &stderr },
-                exit_code,
-                duration,
+                if is_success { stdout } else { stderr },
+                *exit_code,
+                *duration,
             );
 
             ResponseInputItem::FunctionCallOutput {
@@ -1900,23 +1903,16 @@ async fn handle_sandbox_error(
                         stdout,
                         stderr,
                         duration,
-                    } = retry_output;
+                    } = &retry_output;
 
-                    sess.notify_exec_command_end(
-                        &sub_id,
-                        &call_id,
-                        &stdout,
-                        &stderr,
-                        exit_code,
-                        is_apply_patch,
-                    )
-                    .await;
+                    sess.notify_exec_command_end(&sub_id, &call_id, &retry_output, is_apply_patch)
+                        .await;
 
-                    let is_success = exit_code == 0;
+                    let is_success = *exit_code == 0;
                     let content = format_exec_output(
-                        if is_success { &stdout } else { &stderr },
-                        exit_code,
-                        duration,
+                        if is_success { stdout } else { stderr },
+                        *exit_code,
+                        *duration,
                     );
 
                     ResponseInputItem::FunctionCallOutput {
diff --git a/codex-rs/core/src/protocol.rs b/codex-rs/core/src/protocol.rs
index 1bfeee56..cbb211d9 100644
--- a/codex-rs/core/src/protocol.rs
+++ b/codex-rs/core/src/protocol.rs
@@ -523,6 +523,8 @@ pub struct ExecCommandEndEvent {
     pub stderr: String,
     /// The command's exit code.
     pub exit_code: i32,
+    /// The duration of the command execution.
+    pub duration: Duration,
 }
 
 #[derive(Debug, Clone, Deserialize, Serialize)]
diff --git a/codex-rs/core/tests/live_agent.rs b/codex-rs/core/tests/live_agent.rs
index 95408e20..81b3bb2a 100644
--- a/codex-rs/core/tests/live_agent.rs
+++ b/codex-rs/core/tests/live_agent.rs
@@ -177,8 +177,7 @@ async fn live_shell_function_call() {
         match ev.msg {
             EventMsg::ExecCommandBegin(codex_core::protocol::ExecCommandBeginEvent {
                 command,
-                call_id: _,
-                cwd: _,
+                ..
             }) => {
                 assert_eq!(command, vec!["echo", MARKER]);
                 saw_begin = true;
@@ -186,8 +185,7 @@ async fn live_shell_function_call() {
             EventMsg::ExecCommandEnd(codex_core::protocol::ExecCommandEndEvent {
                 stdout,
                 exit_code,
-                call_id: _,
-                stderr: _,
+                ..
             }) => {
                 assert_eq!(exit_code, 0, "echo returned non‑zero exit code");
                 assert!(stdout.contains(MARKER));
diff --git a/codex-rs/exec/src/event_processor_with_human_output.rs b/codex-rs/exec/src/event_processor_with_human_output.rs
index 7393ab72..72e2f929 100644
--- a/codex-rs/exec/src/event_processor_with_human_output.rs
+++ b/codex-rs/exec/src/event_processor_with_human_output.rs
@@ -106,7 +106,6 @@ impl EventProcessorWithHumanOutput {
 
 struct ExecCommandBegin {
     command: Vec<String>,
-    start_time: Instant,
 }
 
 struct PatchApplyBegin {
@@ -228,7 +227,6 @@ impl EventProcessor for EventProcessorWithHumanOutput {
                     call_id.clone(),
                     ExecCommandBegin {
                         command: command.clone(),
-                        start_time: Instant::now(),
                     },
                 );
                 ts_println!(
@@ -244,16 +242,14 @@ impl EventProcessor for EventProcessorWithHumanOutput {
                 call_id,
                 stdout,
                 stderr,
+                duration,
                 exit_code,
             }) => {
                 let exec_command = self.call_id_to_command.remove(&call_id);
-                let (duration, call) = if let Some(ExecCommandBegin {
-                    command,
-                    start_time,
-                }) = exec_command
+                let (duration, call) = if let Some(ExecCommandBegin { command, .. }) = exec_command
                 {
                     (
-                        format!(" in {}", format_elapsed(start_time)),
+                        format!(" in {}", format_duration(duration)),
                         format!("{}", escape_command(&command).style(self.bold)),
                     )
                 } else {
diff --git a/codex-rs/tui/src/chatwidget.rs b/codex-rs/tui/src/chatwidget.rs
index 31151d56..e5ebf58a 100644
--- a/codex-rs/tui/src/chatwidget.rs
+++ b/codex-rs/tui/src/chatwidget.rs
@@ -1,7 +1,6 @@
 use std::collections::HashMap;
 use std::path::PathBuf;
 use std::sync::Arc;
-use std::time::Duration;
 
 use codex_core::codex_wrapper::CodexConversation;
 use codex_core::codex_wrapper::init_codex;
@@ -390,6 +389,7 @@ impl ChatWidget<'_> {
             EventMsg::ExecCommandEnd(ExecCommandEndEvent {
                 call_id,
                 exit_code,
+                duration,
                 stdout,
                 stderr,
             }) => {
@@ -400,7 +400,7 @@ impl ChatWidget<'_> {
                         exit_code,
                         stdout,
                         stderr,
-                        duration: Duration::from_secs(0),
+                        duration,
                     },
                 ));
             }