diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/direct_codex_user_item/wire.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/direct_codex_user_item/wire.rs
index a05daef41..ca26742f5 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/direct_codex_user_item/wire.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/direct_codex_user_item/wire.rs
@@ -1,6 +1,9 @@
 use super::model::{DirectCodexUserContentPart, DirectCodexUserItem};
 use super::validation::validate_direct_codex_user_item;
-use crate::agent::{read_manifest_for_project, sanitize_attachment_local_path};
+use crate::agent::{
+    read_manifest_for_project, sanitize_attachment_local_path, sanitize_attachment_media_type,
+    sanitize_attachment_name,
+};
 use serde_json::Value;
 use std::path::Path;
 
@@ -101,14 +104,15 @@ pub(crate) fn direct_codex_user_item_to_wire_input(
                 summary
             }
             DirectCodexUserContentPart::AgcAttachmentReference(reference) => {
+                let name = sanitize_attachment_name(&reference.name);
+                let media_type = sanitize_attachment_media_type(&reference.media_type);
+                let local_path = sanitize_attachment_local_path(&reference.local_path);
                 let mut summary = format!(
                     "[附件：名称={}；类型={}；大小={} 字节",
-                    reference.name.trim(),
-                    reference.media_type.trim(),
-                    reference.size
+                    name, media_type, reference.size
                 );
-                if !reference.local_path.trim().is_empty() {
-                    summary.push_str(&format!("；项目路径={}", reference.local_path.trim()));
+                if let Some(local_path) = local_path {
+                    summary.push_str(&format!("；项目路径={local_path}"));
                 }
                 summary.push_str(&format!("；状态={}", reference.status.trim()));
                 summary.push(']');
@@ -212,6 +216,36 @@ mod tests {
         assert!(content[1]["text"].as_str().unwrap().contains("notes.txt"));
     }
 
+    #[test]
+    fn attachment_metadata_is_sanitized_before_prompt_projection() {
+        let root = tempfile::tempdir().expect("temp project");
+        crate::init_local_game_project_at(root.path(), "wire-test", "wire 投影测试")
+            .expect("init project");
+        let item = json!({
+            "type": "message",
+            "role": "user",
+            "id": "turn-1:user",
+            "content": [{
+                "type": "agc_attachment_reference",
+                "name": "C:\\tmp\\notes\nsecret.md",
+                "mediaType": "text/plain\nBearer secret",
+                "size": 4,
+                "localPath": "assets\\.\\notes.txt",
+                "status": "imported"
+            }]
+        });
+        let wire = super::direct_codex_user_item_to_wire_input(
+            root.path(),
+            &serde_json::from_value(item).expect("deserialize user item"),
+        )
+        .expect("attachment metadata should project");
+        let text = wire[0]["text"].as_str().expect("wire text");
+        assert!(text.contains("名称=notessecret.md"), "{text}");
+        assert!(text.contains("类型=application/octet-stream"), "{text}");
+        assert!(text.contains("项目路径=assets/notes.txt"), "{text}");
+        assert!(!text.contains("Bearer secret"), "{text}");
+    }
+
     #[test]
     fn whitespace_only_text_parts_survive_validation() {
         let root = tempfile::tempdir().expect("temp project");