From 7e0056fbdfe9e9342f1aa74aefada6aba0deb881 Mon Sep 17 00:00:00 2001
From: Dylan Hurd <dylan.hurd@openai.com>
Date: Wed, 20 Aug 2025 23:46:20 -0700
Subject: [PATCH] [mcp] Add InputItem type

---
 codex-rs/core/src/models.rs                        | 3 +++
 codex-rs/mcp-server/src/codex_message_processor.rs | 6 ++++++
 codex-rs/protocol/src/mcp_protocol.rs              | 8 ++++++++
 codex-rs/protocol/src/protocol.rs                  | 8 ++++++++
 4 files changed, 25 insertions(+)

diff --git a/codex-rs/core/src/models.rs b/codex-rs/core/src/models.rs
index 0c509ee282..6aa6d3351f 100644
--- a/codex-rs/core/src/models.rs
+++ b/codex-rs/core/src/models.rs
@@ -183,6 +183,9 @@ impl From<Vec<InputItem>> for ResponseInputItem {
                             None
                         }
                     },
+                    InputItem::FileReference { name, path } => Some(ContentItem::InputText {
+                        text: format!("[{name}]({})", path.to_string_lossy()),
+                    }),
                     _ => None,
                 })
                 .collect::<Vec<ContentItem>>(),
diff --git a/codex-rs/mcp-server/src/codex_message_processor.rs b/codex-rs/mcp-server/src/codex_message_processor.rs
index 0bbf6ff849..507c45440a 100644
--- a/codex-rs/mcp-server/src/codex_message_processor.rs
+++ b/codex-rs/mcp-server/src/codex_message_processor.rs
@@ -417,6 +417,9 @@ impl CodexMessageProcessor {
                 WireInputItem::Text { text } => CoreInputItem::Text { text },
                 WireInputItem::Image { image_url } => CoreInputItem::Image { image_url },
                 WireInputItem::LocalImage { path } => CoreInputItem::LocalImage { path },
+                WireInputItem::FileReference { name, path } => {
+                    CoreInputItem::FileReference { name, path }
+                }
             })
             .collect();
 
@@ -465,6 +468,9 @@ impl CodexMessageProcessor {
                 WireInputItem::Text { text } => CoreInputItem::Text { text },
                 WireInputItem::Image { image_url } => CoreInputItem::Image { image_url },
                 WireInputItem::LocalImage { path } => CoreInputItem::LocalImage { path },
+                WireInputItem::FileReference { name, path } => {
+                    CoreInputItem::FileReference { name, path }
+                }
             })
             .collect();
 
diff --git a/codex-rs/protocol/src/mcp_protocol.rs b/codex-rs/protocol/src/mcp_protocol.rs
index 7fb087cf2a..6ff41e2925 100644
--- a/codex-rs/protocol/src/mcp_protocol.rs
+++ b/codex-rs/protocol/src/mcp_protocol.rs
@@ -292,6 +292,14 @@ pub enum InputItem {
     LocalImage {
         path: PathBuf,
     },
+
+    /// A reference to a file in the user's workspace.
+    FileReference {
+        /// The name of the file
+        name: String,
+        /// The relative path to the file in the user's workspace.
+        path: PathBuf,
+    },
 }
 
 // TODO(mbolin): Need test to ensure these constants match the enum variants.
diff --git a/codex-rs/protocol/src/protocol.rs b/codex-rs/protocol/src/protocol.rs
index fbe052bf95..e3ca2edc09 100644
--- a/codex-rs/protocol/src/protocol.rs
+++ b/codex-rs/protocol/src/protocol.rs
@@ -376,6 +376,14 @@ pub enum InputItem {
     LocalImage {
         path: std::path::PathBuf,
     },
+
+    /// A reference to a file in the user's workspace.
+    FileReference {
+        /// The name of the file
+        name: String,
+        /// The relative path to the file in the user's workspace.
+        path: PathBuf,
+    },
 }
 
 /// Event Queue Entry - events from agent