diff --git a/codex-rs/core/src/tools/handlers/unified_exec.rs b/codex-rs/core/src/tools/handlers/unified_exec.rs
index 109ac713c..54543277f 100644
--- a/codex-rs/core/src/tools/handlers/unified_exec.rs
+++ b/codex-rs/core/src/tools/handlers/unified_exec.rs
@@ -25,6 +25,8 @@ use crate::unified_exec::UnifiedExecProcessManager;
 use crate::unified_exec::WriteStdinRequest;
 use async_trait::async_trait;
 use codex_features::Feature;
+use codex_otel::SessionTelemetry;
+use codex_otel::metrics::names::TOOL_CALL_UNIFIED_EXEC_METRIC;
 use codex_protocol::models::PermissionProfile;
 use serde::Deserialize;
 use std::path::PathBuf;
@@ -260,6 +262,7 @@ impl ToolHandler for UnifiedExecHandler {
                     });
                 }
 
+                emit_unified_exec_tty_metric(&turn.session_telemetry, tty);
                 manager
                     .exec_command(
                         ExecCommandRequest {
@@ -323,6 +326,14 @@ impl ToolHandler for UnifiedExecHandler {
     }
 }
 
+fn emit_unified_exec_tty_metric(session_telemetry: &SessionTelemetry, tty: bool) {
+    session_telemetry.counter(
+        TOOL_CALL_UNIFIED_EXEC_METRIC,
+        /*inc*/ 1,
+        &[("tty", if tty { "true" } else { "false" })],
+    );
+}
+
 pub(crate) fn get_command(
     args: &ExecCommandArgs,
     session_shell: Arc<Shell>,
diff --git a/codex-rs/otel/src/metrics/names.rs b/codex-rs/otel/src/metrics/names.rs
index 58a82afea..d4f5760d5 100644
--- a/codex-rs/otel/src/metrics/names.rs
+++ b/codex-rs/otel/src/metrics/names.rs
@@ -1,5 +1,6 @@
 pub const TOOL_CALL_COUNT_METRIC: &str = "codex.tool.call";
 pub const TOOL_CALL_DURATION_METRIC: &str = "codex.tool.call.duration_ms";
+pub const TOOL_CALL_UNIFIED_EXEC_METRIC: &str = "codex.tool.unified_exec";
 pub const API_CALL_COUNT_METRIC: &str = "codex.api_request";
 pub const API_CALL_DURATION_METRIC: &str = "codex.api_request.duration_ms";
 pub const SSE_EVENT_COUNT_METRIC: &str = "codex.sse_event";