diff --git a/crates/codex-plus-core/src/protocol_proxy.rs b/crates/codex-plus-core/src/protocol_proxy.rs
index ee01e3e3d..8605a0a61 100644
--- a/crates/codex-plus-core/src/protocol_proxy.rs
+++ b/crates/codex-plus-core/src/protocol_proxy.rs
@@ -2361,6 +2361,15 @@ fn responses_content_to_chat_content(_role: &str, content: &Value) -> Value {
                     }
                 }
             }
+            "encrypted_content" => {
+                if let Some(value) = part
+                    .get("encrypted_content")
+                    .and_then(Value::as_str)
+                    .filter(|value| !value.is_empty())
+                {
+                    chat_parts.push(json!({ "type": "text", "text": value }));
+                }
+            }
             "refusal" => {
                 if let Some(value) = part.get("refusal").and_then(Value::as_str) {
                     if !value.is_empty() {
diff --git a/crates/codex-plus-core/tests/encrypted_content_subagent.rs b/crates/codex-plus-core/tests/encrypted_content_subagent.rs
new file mode 100644
index 000000000..5fbb07b47
--- /dev/null
+++ b/crates/codex-plus-core/tests/encrypted_content_subagent.rs
@@ -0,0 +1,30 @@
+use codex_plus_core::protocol_proxy::responses_to_chat_completions;
+use serde_json::json;
+
+#[test]
+fn responses_request_preserves_encrypted_content_for_subagent_tasks() {
+    let converted = responses_to_chat_completions(json!({
+        "model": "deepseek-v4-flash",
+        "input": [
+            {
+                "type": "message",
+                "role": "user",
+                "content": [
+                    {
+                        "type": "input_text",
+                        "text": "Message Type: NEW_TASK\nTask name: /root/probe_none\nSender: /root\nPayload:\n"
+                    },
+                    {
+                        "type": "encrypted_content",
+                        "encrypted_content": "请回显标记：PROBE-NONE-7F3A"
+                    }
+                ]
+            }
+        ]
+    }))
+    .unwrap();
+
+    let content = converted["messages"][0]["content"].as_str().unwrap();
+    assert!(content.contains("Payload:"));
+    assert!(content.contains("PROBE-NONE-7F3A"));
+}