Materialize codex apps file downloads locally

codex-rs/Cargo.lock

@@ -1987,6 +1987,7 @@ dependencies = [
  "serde_json",
  "serial_test",
  "sha1",
+ "sha2",
  "shlex",
  "similar",
  "tempfile",

codex-rs/app-server/src/message_processor.rs

@@ -753,7 +753,7 @@ impl MessageProcessor {
             | ClientRequest::TurnSteer { request_id, .. } = &codex_request
         {
             self.analytics_events_client.track_request(
-                connection_id.0,
+                connection_request_id.connection_id.0,
                 request_id.clone(),
                 codex_request.clone(),
             );

codex-rs/codex-api/src/files.rs

@@ -10,6 +10,7 @@ use serde::Deserialize;
 use tokio::fs::File;
 use tokio::time::Instant;
 use tokio_util::io::ReaderStream;
+use url::Url;
 
 pub const OPENAI_FILE_URI_PREFIX: &str = "sediment://";
 pub const OPENAI_FILE_UPLOAD_LIMIT_BYTES: u64 = 512 * 1024 * 1024;
@@ -19,6 +20,19 @@ const OPENAI_FILE_FINALIZE_TIMEOUT: Duration = Duration::from_secs(30);
 const OPENAI_FILE_FINALIZE_RETRY_DELAY: Duration = Duration::from_millis(250);
 const OPENAI_FILE_USE_CASE: &str = "codex";
 
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct OpenAiFileUploadOptions {
+    pub store_in_library: bool,
+}
+
+impl Default for OpenAiFileUploadOptions {
+    fn default() -> Self {
+        Self {
+            store_in_library: false,
+        }
+    }
+}
+
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub struct UploadedOpenAiFile {
     pub file_id: String,
@@ -68,6 +82,12 @@ pub enum OpenAiFileError {
         #[source]
         source: serde_json::Error,
     },
+    #[error("failed to resolve OpenAI file URL `{url}`: {source}")]
+    InvalidUrl {
+        url: String,
+        #[source]
+        source: url::ParseError,
+    },
     #[error("OpenAI file upload for `{file_id}` is not ready yet")]
     UploadNotReady { file_id: String },
     #[error("OpenAI file upload for `{file_id}` failed: {message}")]
@@ -94,10 +114,50 @@ pub fn openai_file_uri(file_id: &str) -> String {
     format!("{OPENAI_FILE_URI_PREFIX}{file_id}")
 }
 
+pub async fn download_openai_file(
+    base_url: &str,
+    auth: &impl AuthProvider,
+    download_url: &str,
+) -> Result<Vec<u8>, OpenAiFileError> {
+    let resolved_url = resolve_openai_file_download_url(base_url, download_url)?;
+    let request_builder = if should_attach_auth_to_openai_file_url(&resolved_url, base_url) {
+        authorized_request(auth, reqwest::Method::GET, resolved_url.as_str())
+    } else {
+        build_reqwest_client()
+            .request(reqwest::Method::GET, resolved_url.as_str())
+            .timeout(OPENAI_FILE_REQUEST_TIMEOUT)
+    };
+    let response = request_builder
+        .send()
+        .await
+        .map_err(|source| OpenAiFileError::Request {
+            url: resolved_url.to_string(),
+            source,
+        })?;
+    let status = response.status();
+    if !status.is_success() {
+        let body = response.text().await.unwrap_or_default();
+        return Err(OpenAiFileError::UnexpectedStatus {
+            url: resolved_url.to_string(),
+            status,
+            body,
+        });
+    }
+    let bytes = response
+        .bytes()
+        .await
+        .map_err(|source| OpenAiFileError::Request {
+            url: resolved_url.to_string(),
+            source,
+        })?;
+    Ok(bytes.to_vec())
+}
+
 pub async fn upload_local_file(
     base_url: &str,
     auth: &impl AuthProvider,
     path: &Path,
+    options: &OpenAiFileUploadOptions,
 ) -> Result<UploadedOpenAiFile, OpenAiFileError> {
     let metadata = tokio::fs::metadata(path)
         .await
@@ -129,12 +189,16 @@ pub async fn upload_local_file(
         .unwrap_or("file")
         .to_string();
     let create_url = format!("{}/files", base_url.trim_end_matches('/'));
+    let mut create_request = serde_json::json!({
+        "file_name": file_name,
+        "file_size": metadata.len(),
+        "use_case": OPENAI_FILE_USE_CASE,
+    });
+    if options.store_in_library {
+        create_request["store_in_library"] = serde_json::json!(true);
+    }
     let create_response = authorized_request(auth, reqwest::Method::POST, &create_url)
-        .json(&serde_json::json!({
-            "file_name": file_name,
-            "file_size": metadata.len(),
-            "use_case": OPENAI_FILE_USE_CASE,
-        }))
+        .json(&create_request)
         .send()
         .await
         .map_err(|source| OpenAiFileError::Request {
@@ -266,6 +330,46 @@ fn authorized_request(
         .headers(headers)
 }
 
+fn resolve_openai_file_download_url(
+    base_url: &str,
+    download_url: &str,
+) -> Result<Url, OpenAiFileError> {
+    match Url::parse(download_url) {
+        Ok(url) => Ok(url),
+        Err(url::ParseError::RelativeUrlWithoutBase) => {
+            let normalized_base_url = if base_url.ends_with('/') {
+                base_url.to_string()
+            } else {
+                format!("{base_url}/")
+            };
+            let base =
+                Url::parse(&normalized_base_url).map_err(|source| OpenAiFileError::InvalidUrl {
+                    url: normalized_base_url.clone(),
+                    source,
+                })?;
+            base.join(download_url)
+                .map_err(|source| OpenAiFileError::InvalidUrl {
+                    url: download_url.to_string(),
+                    source,
+                })
+        }
+        Err(source) => Err(OpenAiFileError::InvalidUrl {
+            url: download_url.to_string(),
+            source,
+        }),
+    }
+}
+
+fn should_attach_auth_to_openai_file_url(download_url: &Url, base_url: &str) -> bool {
+    let Ok(base_url) = Url::parse(base_url) else {
+        return false;
+    };
+    match (download_url.host_str(), base_url.host_str()) {
+        (Some(download_host), Some(base_host)) => download_host.eq_ignore_ascii_case(base_host),
+        _ => false,
+    }
+}
+
 fn build_reqwest_client() -> reqwest::Client {
     build_reqwest_client_with_custom_ca(reqwest::Client::builder()).unwrap_or_else(|error| {
         tracing::warn!(error = %error, "failed to build OpenAI file upload client");
@@ -299,6 +403,32 @@ mod tests {
         format!("{}/backend-api", server.uri())
     }
 
+    #[tokio::test]
+    async fn download_openai_file_resolves_relative_url_and_attaches_auth() {
+        let server = MockServer::start().await;
+        Mock::given(method("GET"))
+            .and(path("/files/download/file_123"))
+            .and(header("authorization", "Bearer token"))
+            .and(header("chatgpt-account-id", "account_id"))
+            .respond_with(
+                ResponseTemplate::new(200)
+                    .insert_header("content-type", "text/plain")
+                    .set_body_bytes(b"hello".to_vec()),
+            )
+            .mount(&server)
+            .await;
+
+        let downloaded = download_openai_file(
+            &format!("{}/backend-api/codex", server.uri()),
+            &chatgpt_auth(),
+            "/files/download/file_123",
+        )
+        .await
+        .expect("download succeeds");
+
+        assert_eq!(downloaded, b"hello".to_vec());
+    }
+
     #[tokio::test]
     async fn upload_local_file_returns_canonical_uri() {
         let server = MockServer::start().await;
@@ -350,9 +480,14 @@ mod tests {
         let path = dir.path().join("hello.txt");
         tokio::fs::write(&path, b"hello").await.expect("write file");
 
-        let uploaded = upload_local_file(&base_url, &chatgpt_auth(), &path)
-            .await
-            .expect("upload succeeds");
+        let uploaded = upload_local_file(
+            &base_url,
+            &chatgpt_auth(),
+            &path,
+            &OpenAiFileUploadOptions::default(),
+        )
+        .await
+        .expect("upload succeeds");
 
         assert_eq!(uploaded.file_id, "file_123");
         assert_eq!(uploaded.uri, "sediment://file_123");

codex-rs/codex-api/src/lib.rs

@@ -54,6 +54,8 @@ pub use crate::endpoint::ResponsesWebsocketClient;
 pub use crate::endpoint::ResponsesWebsocketConnection;
 pub use crate::endpoint::session_update_session_json;
 pub use crate::error::ApiError;
+pub use crate::files::OpenAiFileUploadOptions;
+pub use crate::files::download_openai_file;
 pub use crate::files::upload_local_file;
 pub use crate::provider::Provider;
 pub use crate::provider::RetryConfig;

codex-rs/codex-mcp/src/codex_apps_library_tools.rs

@@ -0,0 +1,16 @@
+pub const SEARCH_LIBRARY_FILES_TOOL_NAME: &str = "search_library_files";
+pub const LIST_LIBRARY_DIRECTORY_NODES_TOOL_NAME: &str = "list_library_directory_nodes";
+pub const DOWNLOAD_LIBRARY_FILE_TOOL_NAME: &str = "download_library_file";
+pub const CREATE_LIBRARY_FILE_TOOL_NAME: &str = "create_library_file";
+pub const WRITEBACK_LIBRARY_FILE_TOOL_NAME: &str = "writeback_library_file";
+
+pub fn is_codex_apps_library_tool(tool_name: &str) -> bool {
+    matches!(
+        tool_name,
+        SEARCH_LIBRARY_FILES_TOOL_NAME
+            | LIST_LIBRARY_DIRECTORY_NODES_TOOL_NAME
+            | DOWNLOAD_LIBRARY_FILE_TOOL_NAME
+            | CREATE_LIBRARY_FILE_TOOL_NAME
+            | WRITEBACK_LIBRARY_FILE_TOOL_NAME
+    )
+}

codex-rs/codex-mcp/src/lib.rs

@@ -1,7 +1,14 @@
+pub(crate) mod codex_apps_library_tools;
 pub(crate) mod mcp;
 pub(crate) mod mcp_connection_manager;
 pub(crate) mod mcp_tool_names;
 
+pub use codex_apps_library_tools::CREATE_LIBRARY_FILE_TOOL_NAME;
+pub use codex_apps_library_tools::DOWNLOAD_LIBRARY_FILE_TOOL_NAME;
+pub use codex_apps_library_tools::LIST_LIBRARY_DIRECTORY_NODES_TOOL_NAME;
+pub use codex_apps_library_tools::SEARCH_LIBRARY_FILES_TOOL_NAME;
+pub use codex_apps_library_tools::WRITEBACK_LIBRARY_FILE_TOOL_NAME;
+pub use codex_apps_library_tools::is_codex_apps_library_tool;
 pub use mcp::CODEX_APPS_MCP_SERVER_NAME;
 pub use mcp::McpAuthStatusEntry;
 pub use mcp::McpConfig;

codex-rs/codex-mcp/src/mcp_connection_manager_tests.rs

@@ -727,7 +727,10 @@ async fn list_all_tools_does_not_block_when_startup_snapshot_cache_hit_is_empty(
     let timeout_result =
         tokio::time::timeout(Duration::from_millis(10), manager.list_all_tools()).await;
     let tools = timeout_result.expect("cache-hit startup snapshot should not block");
-    assert!(tools.is_empty());
+    assert!(
+        tools.is_empty(),
+        "empty startup snapshots should not synthesize codex apps tools"
+    );
 }
 
 #[tokio::test]

codex-rs/core/Cargo.toml

@@ -97,6 +97,7 @@ rmcp = { workspace = true, default-features = false, features = [
 ] }
 serde = { workspace = true, features = ["derive"] }
 serde_json = { workspace = true }
+sha2 = { workspace = true }
 sha1 = { workspace = true }
 shlex = { workspace = true }
 similar = { workspace = true }

codex-rs/core/src/codex.rs

@@ -7052,12 +7052,7 @@ async fn run_sampling_request(
     let _code_mode_worker = sess
         .services
         .code_mode_service
-        .start_turn_worker(
-            &sess,
-            &turn_context,
-            Arc::clone(&router),
-            Arc::clone(&turn_diff_tracker),
-        )
+        .start_turn_worker(&sess, &turn_context, Arc::clone(&turn_diff_tracker))
         .await;
     let mut retries = 0;
     let mut initial_input = Some(input);

codex-rs/core/src/codex_apps_file_download.rs

@@ -0,0 +1,413 @@
+use crate::codex::Session;
+use crate::codex::TurnContext;
+use crate::codex_apps_mcp_tools::should_materialize_codex_apps_file_download;
+use codex_api::CoreAuthProvider;
+use codex_api::download_openai_file;
+use codex_login::CodexAuth;
+use codex_protocol::mcp::CallToolResult;
+use serde::Deserialize;
+use serde::Serialize;
+use serde_json::Map as JsonMap;
+use serde_json::Value as JsonValue;
+use tracing::warn;
+
+const CODEX_APPS_FILE_DOWNLOAD_ARTIFACTS_DIR: &str = ".tmp/codex_apps_downloads";
+
+#[derive(Debug, Deserialize, Serialize)]
+struct CodexAppsFileDownloadPayload {
+    file_id: String,
+    #[serde(default)]
+    file_name: Option<String>,
+    file_uri: CodexAppsFileUri,
+}
+
+#[derive(Debug, Deserialize, Serialize)]
+struct CodexAppsFileUri {
+    download_url: String,
+    #[serde(default)]
+    file_name: Option<String>,
+}
+
+pub(crate) async fn maybe_materialize_codex_apps_file_download_result(
+    sess: &Session,
+    turn_context: &TurnContext,
+    server: &str,
+    codex_apps_meta: Option<&JsonMap<String, JsonValue>>,
+    result: CallToolResult,
+) -> CallToolResult {
+    let auth = sess.services.auth_manager.auth().await;
+    maybe_materialize_codex_apps_file_download_result_with_auth(
+        turn_context,
+        &sess.conversation_id.to_string(),
+        auth.as_ref(),
+        server,
+        codex_apps_meta,
+        result,
+    )
+    .await
+}
+
+async fn maybe_materialize_codex_apps_file_download_result_with_auth(
+    turn_context: &TurnContext,
+    session_id: &str,
+    auth: Option<&CodexAuth>,
+    server: &str,
+    codex_apps_meta: Option<&JsonMap<String, JsonValue>>,
+    mut result: CallToolResult,
+) -> CallToolResult {
+    if !should_materialize_codex_apps_file_download(server, codex_apps_meta)
+        || result.is_error == Some(true)
+    {
+        return result;
+    }
+
+    let Some(payload) = extract_codex_apps_file_download_payload(&result) else {
+        return result;
+    };
+    if result.structured_content.is_none()
+        && let Ok(structured_content) = serde_json::to_value(&payload)
+    {
+        result.structured_content = Some(structured_content);
+    }
+
+    let Some(auth) = auth else {
+        warn!(
+            "skipping codex_apps file download materialization because ChatGPT auth is unavailable"
+        );
+        return result;
+    };
+    let token_data = match auth.get_token_data() {
+        Ok(token_data) => token_data,
+        Err(error) => {
+            warn!(error = %error, "failed to read ChatGPT auth for codex_apps file download materialization");
+            return result;
+        }
+    };
+    let download_auth = CoreAuthProvider {
+        token: Some(token_data.access_token),
+        account_id: token_data
+            .id_token
+            .chatgpt_account_id
+            .clone()
+            .or(token_data.account_id),
+    };
+    let downloaded = match download_openai_file(
+        turn_context.config.chatgpt_base_url.trim_end_matches('/'),
+        &download_auth,
+        &payload.file_uri.download_url,
+    )
+    .await
+    {
+        Ok(downloaded) => downloaded,
+        Err(error) => {
+            warn!(
+                error = %error,
+                file_id = payload.file_id,
+                "failed to materialize codex_apps file download via app-server",
+            );
+            return result;
+        }
+    };
+
+    let artifact_path = codex_apps_file_download_artifact_path(
+        &turn_context.config.codex_home,
+        session_id,
+        &payload.file_id,
+        payload
+            .file_name
+            .as_deref()
+            .or(payload.file_uri.file_name.as_deref())
+            .unwrap_or("downloaded_file"),
+    );
+    if let Some(parent) = artifact_path.parent()
+        && let Err(error) = tokio::fs::create_dir_all(parent.as_path()).await
+    {
+        warn!(
+            error = %error,
+            path = %parent.display(),
+            "failed to create codex_apps file download artifact directory",
+        );
+        return result;
+    }
+    if let Err(error) = tokio::fs::write(artifact_path.as_path(), &downloaded).await {
+        warn!(
+            error = %error,
+            path = %artifact_path.display(),
+            "failed to write codex_apps file download artifact",
+        );
+        return result;
+    }
+
+    let local_path = artifact_path.to_string_lossy().to_string();
+    if let Some(JsonValue::Object(map)) = result.structured_content.as_mut() {
+        map.insert(
+            "local_path".to_string(),
+            JsonValue::String(local_path.clone()),
+        );
+    }
+    result.content.push(serde_json::json!({
+        "type": "text",
+        "text": format!("Downloaded file to local path: {local_path}"),
+    }));
+    result
+}
+
+fn extract_codex_apps_file_download_payload(
+    result: &CallToolResult,
+) -> Option<CodexAppsFileDownloadPayload> {
+    if let Some(structured_content) = result.structured_content.clone()
+        && let Ok(payload) =
+            serde_json::from_value::<CodexAppsFileDownloadPayload>(structured_content)
+    {
+        return Some(payload);
+    }
+
+    result
+        .content
+        .iter()
+        .filter_map(|item| item.as_object())
+        .find_map(|item| {
+            let text = item.get("text")?.as_str()?;
+            serde_json::from_str::<CodexAppsFileDownloadPayload>(text).ok()
+        })
+}
+
+fn codex_apps_file_download_artifact_path(
+    codex_home: &codex_utils_absolute_path::AbsolutePathBuf,
+    session_id: &str,
+    file_id: &str,
+    file_name: &str,
+) -> codex_utils_absolute_path::AbsolutePathBuf {
+    codex_home
+        .join(CODEX_APPS_FILE_DOWNLOAD_ARTIFACTS_DIR)
+        .join(sanitize_path_component(session_id, "session"))
+        .join(sanitize_path_component(file_id, "file"))
+        .join(sanitize_file_name(file_name))
+}
+
+fn sanitize_path_component(value: &str, fallback: &str) -> String {
+    let sanitized: String = value
+        .chars()
+        .map(|ch| {
+            if ch.is_ascii_alphanumeric() || ch == '-' || ch == '_' {
+                ch
+            } else {
+                '_'
+            }
+        })
+        .collect();
+    if sanitized.is_empty() {
+        fallback.to_string()
+    } else {
+        sanitized
+    }
+}
+
+fn sanitize_file_name(value: &str) -> String {
+    let sanitized: String = value
+        .chars()
+        .map(|ch| {
+            if ch.is_ascii_alphanumeric() || ch == '-' || ch == '_' || ch == '.' {
+                ch
+            } else {
+                '_'
+            }
+        })
+        .collect();
+    if sanitized.is_empty() {
+        "downloaded_file".to_string()
+    } else {
+        sanitized
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::codex::make_session_and_context;
+    use codex_login::CodexAuth;
+    use pretty_assertions::assert_eq;
+    use std::sync::Arc;
+    use wiremock::Mock;
+    use wiremock::MockServer;
+    use wiremock::ResponseTemplate;
+    use wiremock::matchers::header;
+    use wiremock::matchers::method;
+    use wiremock::matchers::path;
+
+    fn download_materialization_meta() -> JsonMap<String, JsonValue> {
+        serde_json::json!({
+            "provider": "builtin",
+            "materialize_file_download": true,
+        })
+        .as_object()
+        .cloned()
+        .expect("_codex_apps metadata object")
+    }
+
+    #[tokio::test]
+    async fn codex_apps_file_download_materialization_ignores_results_without_metadata_flag() {
+        let (_, turn_context) = make_session_and_context().await;
+        let original = CallToolResult {
+            content: vec![serde_json::json!({"type": "text", "text": "hello"})],
+            structured_content: Some(serde_json::json!({"x": 1})),
+            is_error: Some(false),
+            meta: None,
+        };
+
+        let result = maybe_materialize_codex_apps_file_download_result_with_auth(
+            &turn_context,
+            "session-1",
+            Some(&CodexAuth::create_dummy_chatgpt_auth_for_testing()),
+            "custom_server",
+            /*codex_apps_meta*/ None,
+            original.clone(),
+        )
+        .await;
+
+        assert_eq!(result, original);
+    }
+
+    #[tokio::test]
+    async fn codex_apps_file_download_materialization_adds_local_path_for_marked_tools() {
+        let server = MockServer::start().await;
+        Mock::given(method("GET"))
+            .and(path("/api/codex/files/file_123/content"))
+            .and(header("authorization", "Bearer Access Token"))
+            .and(header("chatgpt-account-id", "account_id"))
+            .respond_with(
+                ResponseTemplate::new(200)
+                    .insert_header("content-type", "text/plain")
+                    .set_body_bytes(b"downloaded contents".to_vec()),
+            )
+            .mount(&server)
+            .await;
+
+        let (_, mut turn_context) = make_session_and_context().await;
+        let mut config = (*turn_context.config).clone();
+        config.chatgpt_base_url = format!("{}/backend-api/codex", server.uri());
+        turn_context.config = Arc::new(config);
+        let original = CallToolResult {
+            content: vec![serde_json::json!({
+                "type": "text",
+                "text": "{\"file_id\":\"file_123\"}",
+            })],
+            structured_content: Some(serde_json::json!({
+                "file_id": "file_123",
+                "file_name": "testing-file.txt",
+                "file_uri": {
+                    "download_url": "/api/codex/files/file_123/content",
+                    "file_id": "file_123",
+                    "file_name": "testing-file.txt",
+                    "mime_type": "text/plain",
+                }
+            })),
+            is_error: Some(false),
+            meta: None,
+        };
+
+        let result = maybe_materialize_codex_apps_file_download_result_with_auth(
+            &turn_context,
+            "session-1",
+            Some(&CodexAuth::create_dummy_chatgpt_auth_for_testing()),
+            codex_mcp::CODEX_APPS_MCP_SERVER_NAME,
+            Some(&download_materialization_meta()),
+            original,
+        )
+        .await;
+
+        let local_path = result
+            .structured_content
+            .as_ref()
+            .and_then(|value| value.get("local_path"))
+            .and_then(JsonValue::as_str)
+            .expect("local_path in structured content");
+        assert!(local_path.contains("codex_apps_downloads"));
+        let saved = tokio::fs::read(local_path)
+            .await
+            .expect("saved local file should exist");
+        assert_eq!(saved, b"downloaded contents".to_vec());
+        assert!(result.content.iter().any(|block| {
+            block.get("type").and_then(JsonValue::as_str) == Some("text")
+                && block
+                    .get("text")
+                    .and_then(JsonValue::as_str)
+                    .is_some_and(|text| text.contains("Downloaded file to local path:"))
+        }));
+    }
+
+    #[tokio::test]
+    async fn codex_apps_file_download_materialization_uses_json_text_when_structured_content_is_missing()
+     {
+        let server = MockServer::start().await;
+        Mock::given(method("GET"))
+            .and(path("/api/codex/files/file_123/content"))
+            .and(header("authorization", "Bearer Access Token"))
+            .and(header("chatgpt-account-id", "account_id"))
+            .respond_with(
+                ResponseTemplate::new(200)
+                    .insert_header("content-type", "text/plain")
+                    .set_body_bytes(b"downloaded contents".to_vec()),
+            )
+            .mount(&server)
+            .await;
+
+        let (_, mut turn_context) = make_session_and_context().await;
+        let mut config = (*turn_context.config).clone();
+        config.chatgpt_base_url = format!("{}/backend-api/codex", server.uri());
+        turn_context.config = Arc::new(config);
+        let original = CallToolResult {
+            content: vec![serde_json::json!({
+                "type": "text",
+                "text": serde_json::json!({
+                    "file_id": "file_123",
+                    "file_name": "testing-file.txt",
+                    "file_uri": {
+                        "download_url": "/api/codex/files/file_123/content",
+                        "file_name": "testing-file.txt",
+                    }
+                })
+                .to_string(),
+            })],
+            structured_content: None,
+            is_error: Some(false),
+            meta: None,
+        };
+
+        let result = maybe_materialize_codex_apps_file_download_result_with_auth(
+            &turn_context,
+            "session-1",
+            Some(&CodexAuth::create_dummy_chatgpt_auth_for_testing()),
+            codex_mcp::CODEX_APPS_MCP_SERVER_NAME,
+            Some(&download_materialization_meta()),
+            original,
+        )
+        .await;
+
+        let local_path = result
+            .content
+            .iter()
+            .find_map(|item| {
+                item.get("text")
+                    .and_then(|text| text.as_str())
+                    .and_then(|text| text.strip_prefix("Downloaded file to local path: "))
+            })
+            .expect("expected local path announcement");
+        assert_eq!(
+            result.structured_content,
+            Some(serde_json::json!({
+                "file_id": "file_123",
+                "file_name": "testing-file.txt",
+                "file_uri": {
+                    "download_url": "/api/codex/files/file_123/content",
+                    "file_name": "testing-file.txt",
+                },
+                "local_path": local_path,
+            }))
+        );
+        assert_eq!(
+            tokio::fs::read(local_path).await.expect("downloaded file"),
+            b"downloaded contents"
+        );
+    }
+}

codex-rs/core/src/codex_apps_mcp_tools.rs

@@ -0,0 +1,72 @@
+use codex_mcp::CODEX_APPS_MCP_SERVER_NAME;
+use codex_mcp::ToolInfo as McpToolInfo;
+use serde_json::Map;
+use serde_json::Value;
+
+pub(crate) const CODEX_APPS_META_KEY: &str = "_codex_apps";
+
+const CODEX_APPS_PROVIDER_BUILTIN: &str = "builtin";
+const CODEX_APPS_META_PROVIDER_KEY: &str = "provider";
+const CODEX_APPS_META_DIRECT_EXPOSE_KEY: &str = "direct_expose";
+const CODEX_APPS_META_MATERIALIZE_FILE_DOWNLOAD_KEY: &str = "materialize_file_download";
+
+pub(crate) fn is_direct_exposed_codex_apps_builtin_tool_info(tool: &McpToolInfo) -> bool {
+    is_direct_exposed_codex_apps_builtin(
+        &tool.server_name,
+        tool.connector_id.as_deref(),
+        codex_apps_meta_from_tool_info(tool),
+    )
+}
+
+pub(crate) fn is_direct_exposed_codex_apps_builtin(
+    server_name: &str,
+    connector_id: Option<&str>,
+    codex_apps_meta: Option<&Map<String, Value>>,
+) -> bool {
+    if server_name != CODEX_APPS_MCP_SERVER_NAME || connector_id.is_some() {
+        return false;
+    }
+
+    let Some(codex_apps_meta) = codex_apps_meta else {
+        return false;
+    };
+
+    codex_apps_meta
+        .get(CODEX_APPS_META_PROVIDER_KEY)
+        .and_then(Value::as_str)
+        == Some(CODEX_APPS_PROVIDER_BUILTIN)
+        && codex_apps_meta
+            .get(CODEX_APPS_META_DIRECT_EXPOSE_KEY)
+            .and_then(Value::as_bool)
+            == Some(true)
+}
+
+pub(crate) fn should_materialize_codex_apps_file_download(
+    server_name: &str,
+    codex_apps_meta: Option<&Map<String, Value>>,
+) -> bool {
+    if server_name != CODEX_APPS_MCP_SERVER_NAME {
+        return false;
+    }
+
+    let Some(codex_apps_meta) = codex_apps_meta else {
+        return false;
+    };
+
+    codex_apps_meta
+        .get(CODEX_APPS_META_PROVIDER_KEY)
+        .and_then(Value::as_str)
+        == Some(CODEX_APPS_PROVIDER_BUILTIN)
+        && codex_apps_meta
+            .get(CODEX_APPS_META_MATERIALIZE_FILE_DOWNLOAD_KEY)
+            .and_then(Value::as_bool)
+            == Some(true)
+}
+
+fn codex_apps_meta_from_tool_info(tool: &McpToolInfo) -> Option<&Map<String, Value>> {
+    tool.tool
+        .meta
+        .as_ref()
+        .and_then(|meta| meta.get(CODEX_APPS_META_KEY))
+        .and_then(Value::as_object)
+}

codex-rs/core/src/codex_tests.rs

@@ -410,6 +410,16 @@ fn make_mcp_tool(
     tool_name: &str,
     connector_id: Option<&str>,
     connector_name: Option<&str>,
+) -> ToolInfo {
+    make_mcp_tool_with_meta(server_name, tool_name, connector_id, connector_name, None)
+}
+
+fn make_mcp_tool_with_meta(
+    server_name: &str,
+    tool_name: &str,
+    connector_id: Option<&str>,
+    connector_name: Option<&str>,
+    meta: Option<JsonObject>,
 ) -> ToolInfo {
     let tool_namespace = if server_name == CODEX_APPS_MCP_SERVER_NAME {
         connector_name
@@ -434,7 +444,7 @@ fn make_mcp_tool(
             annotations: None,
             execution: None,
             icons: None,
-            meta: None,
+            meta: meta.map(rmcp::model::Meta),
         },
         connector_id: connector_id.map(str::to_string),
         connector_name: connector_name.map(str::to_string),
@@ -443,6 +453,18 @@ fn make_mcp_tool(
     }
 }
 
+fn direct_exposed_builtin_codex_apps_meta() -> JsonObject {
+    serde_json::json!({
+        "_codex_apps": {
+            "provider": "builtin",
+            "direct_expose": true,
+        },
+    })
+    .as_object()
+    .cloned()
+    .expect("tool metadata object")
+}
+
 fn numbered_mcp_tools(count: usize) -> HashMap<String, ToolInfo> {
     (0..count)
         .map(|index| {
@@ -1131,6 +1153,72 @@ async fn mcp_tool_exposure_directly_exposes_explicit_apps_without_deferred_overl
     assert!(deferred_tools.contains_key("mcp__rmcp__tool_0"));
 }
 
+#[tokio::test]
+async fn mcp_tool_exposure_directly_exposes_builtin_codex_apps_tools_marked_for_direct_exposure() {
+    let config = test_config().await;
+    let tools_config = tools_config_for_mcp_tool_exposure(/*search_tool*/ true).await;
+    let mcp_tools = HashMap::from([(
+        "mcp__codex_apps__builtin_search_file".to_string(),
+        make_mcp_tool_with_meta(
+            CODEX_APPS_MCP_SERVER_NAME,
+            "builtin_search_file",
+            /*connector_id*/ None,
+            /*connector_name*/ None,
+            Some(direct_exposed_builtin_codex_apps_meta()),
+        ),
+    )]);
+
+    let exposure = build_mcp_tool_exposure(
+        &mcp_tools,
+        /*connectors*/ None,
+        &[],
+        &config,
+        &tools_config,
+    );
+
+    assert_eq!(
+        exposure.direct_tools.into_keys().collect::<Vec<_>>(),
+        vec!["mcp__codex_apps__builtin_search_file".to_string()]
+    );
+    assert!(exposure.deferred_tools.is_none());
+}
+
+#[tokio::test]
+async fn mcp_tool_exposure_keeps_direct_exposed_builtin_codex_apps_tools_out_of_deferred_sets() {
+    let config = test_config().await;
+    let tools_config = tools_config_for_mcp_tool_exposure(/*search_tool*/ true).await;
+    let mut mcp_tools = numbered_mcp_tools(DIRECT_MCP_TOOL_EXPOSURE_THRESHOLD);
+    mcp_tools.insert(
+        "mcp__codex_apps__builtin_search_file".to_string(),
+        make_mcp_tool_with_meta(
+            CODEX_APPS_MCP_SERVER_NAME,
+            "builtin_search_file",
+            /*connector_id*/ None,
+            /*connector_name*/ None,
+            Some(direct_exposed_builtin_codex_apps_meta()),
+        ),
+    );
+
+    let exposure = build_mcp_tool_exposure(
+        &mcp_tools,
+        /*connectors*/ None,
+        &[],
+        &config,
+        &tools_config,
+    );
+
+    assert_eq!(
+        exposure.direct_tools.into_keys().collect::<Vec<_>>(),
+        vec!["mcp__codex_apps__builtin_search_file".to_string()]
+    );
+    let deferred_tools = exposure
+        .deferred_tools
+        .as_ref()
+        .expect("large tool sets should be discoverable through tool_search");
+    assert!(!deferred_tools.contains_key("mcp__codex_apps__builtin_search_file"));
+    assert!(deferred_tools.contains_key("mcp__rmcp__tool_0"));
+}
+
 #[tokio::test]
 async fn reconstruct_history_matches_live_compactions() {
     let (session, turn_context) = make_session_and_context().await;

codex-rs/core/src/lib.rs

@@ -21,6 +21,8 @@ mod compact_remote;
 pub use codex_thread::CodexThread;
 pub use codex_thread::ThreadConfigSnapshot;
 mod agent;
+mod codex_apps_file_download;
+mod codex_apps_mcp_tools;
 mod codex_delegate;
 mod command_canonicalization;
 mod commit_attribution;

codex-rs/core/src/mcp_openai_file.rs

@@ -13,6 +13,7 @@
 use crate::codex::Session;
 use crate::codex::TurnContext;
 use codex_api::CoreAuthProvider;
+use codex_api::OpenAiFileUploadOptions;
 use codex_api::upload_local_file;
 use codex_login::CodexAuth;
 use serde_json::Value as JsonValue;
@@ -22,6 +23,7 @@ pub(crate) async fn rewrite_mcp_tool_arguments_for_openai_files(
     turn_context: &TurnContext,
     arguments_value: Option<JsonValue>,
     openai_file_input_params: Option<&[String]>,
+    upload_options: Option<&OpenAiFileUploadOptions>,
 ) -> Result<Option<JsonValue>, String> {
     let Some(openai_file_input_params) = openai_file_input_params else {
         return Ok(arguments_value);
@@ -40,9 +42,14 @@ pub(crate) async fn rewrite_mcp_tool_arguments_for_openai_files(
         let Some(value) = arguments.get(field_name) else {
             continue;
         };
-        let Some(uploaded_value) =
-            rewrite_argument_value_for_openai_files(turn_context, auth.as_ref(), field_name, value)
-                .await?
+        let Some(uploaded_value) = rewrite_argument_value_for_openai_files(
+            turn_context,
+            auth.as_ref(),
+            field_name,
+            value,
+            upload_options,
+        )
+        .await?
         else {
             continue;
         };
@@ -61,6 +68,7 @@ async fn rewrite_argument_value_for_openai_files(
     auth: Option<&CodexAuth>,
     field_name: &str,
     value: &JsonValue,
+    upload_options: Option<&OpenAiFileUploadOptions>,
 ) -> Result<Option<JsonValue>, String> {
     match value {
         JsonValue::String(path_or_file_ref) => {
@@ -70,6 +78,7 @@ async fn rewrite_argument_value_for_openai_files(
                 field_name,
                 /*index*/ None,
                 path_or_file_ref,
+                upload_options,
             )
             .await?;
             Ok(Some(rewritten))
@@ -86,6 +95,7 @@ async fn rewrite_argument_value_for_openai_files(
                     field_name,
                     Some(index),
                     path_or_file_ref,
+                    upload_options,
                 )
                 .await?;
                 rewritten_values.push(rewritten);
@@ -102,6 +112,7 @@ async fn build_uploaded_local_argument_value(
     field_name: &str,
     index: Option<usize>,
     file_path: &str,
+    upload_options: Option<&OpenAiFileUploadOptions>,
 ) -> Result<JsonValue, String> {
     let resolved_path = turn_context.resolve_path(Some(file_path.to_string()));
     let Some(auth) = auth else {
@@ -116,10 +127,12 @@ async fn build_uploaded_local_argument_value(
         token: Some(token_data.access_token),
         account_id: token_data.account_id,
     };
+    let default_upload_options = OpenAiFileUploadOptions::default();
     let uploaded = upload_local_file(
         turn_context.config.chatgpt_base_url.trim_end_matches('/'),
         &upload_auth,
         &resolved_path,
+        upload_options.unwrap_or(&default_upload_options),
     )
     .await
     .map_err(|error| match index {
@@ -159,6 +172,7 @@ mod tests {
             &Arc::new(turn_context),
             arguments.clone(),
             /*openai_file_input_params*/ None,
+            /*upload_options*/ None,
         )
         .await
         .expect("rewrite should succeed");
@@ -230,6 +244,7 @@ mod tests {
             "file",
             /*index*/ None,
             "file_report.csv",
+            /*upload_options*/ None,
         )
         .await
         .expect("rewrite should upload the local file");
@@ -247,6 +262,92 @@ mod tests {
         );
     }
 
+    #[tokio::test]
+    async fn build_uploaded_local_argument_value_honors_upload_options() {
+        use wiremock::Mock;
+        use wiremock::MockServer;
+        use wiremock::ResponseTemplate;
+        use wiremock::matchers::body_json;
+        use wiremock::matchers::header;
+        use wiremock::matchers::method;
+        use wiremock::matchers::path;
+
+        let server = MockServer::start().await;
+        Mock::given(method("POST"))
+            .and(path("/backend-api/files"))
+            .and(header("chatgpt-account-id", "account_id"))
+            .and(body_json(serde_json::json!({
+                "file_name": "library.txt",
+                "file_size": 7,
+                "use_case": "codex",
+                "store_in_library": true,
+            })))
+            .respond_with(ResponseTemplate::new(200).set_body_json(serde_json::json!({
+                "file_id": "file_library",
+                "upload_url": format!("{}/upload/file_library", server.uri()),
+            })))
+            .expect(1)
+            .mount(&server)
+            .await;
+        Mock::given(method("PUT"))
+            .and(path("/upload/file_library"))
+            .respond_with(ResponseTemplate::new(200))
+            .expect(1)
+            .mount(&server)
+            .await;
+        Mock::given(method("POST"))
+            .and(path("/backend-api/files/file_library/uploaded"))
+            .respond_with(ResponseTemplate::new(200).set_body_json(serde_json::json!({
+                "status": "success",
+                "download_url": format!("{}/download/file_library", server.uri()),
+                "file_name": "library.txt",
+                "mime_type": "text/plain",
+                "file_size_bytes": 7,
+            })))
+            .expect(1)
+            .mount(&server)
+            .await;
+
+        let (_, mut turn_context) = make_session_and_context().await;
+        let auth = CodexAuth::create_dummy_chatgpt_auth_for_testing();
+        let dir = tempdir().expect("temp dir");
+        let local_path = dir.path().join("library.txt");
+        tokio::fs::write(&local_path, b"library")
+            .await
+            .expect("write local file");
+        turn_context.cwd = AbsolutePathBuf::try_from(dir.path()).expect("absolute path");
+
+        let mut config = (*turn_context.config).clone();
+        config.chatgpt_base_url = format!("{}/backend-api", server.uri());
+        turn_context.config = Arc::new(config);
+
+        let upload_options = OpenAiFileUploadOptions {
+            store_in_library: true,
+        };
+        let rewritten = build_uploaded_local_argument_value(
+            &turn_context,
+            Some(&auth),
+            "file",
+            /*index*/ None,
+            "library.txt",
+            Some(&upload_options),
+        )
+        .await
+        .expect("rewrite should upload the local file");
+
+        assert_eq!(
+            rewritten,
+            serde_json::json!({
+                "download_url": format!("{}/download/file_library", server.uri()),
+                "file_id": "file_library",
+                "mime_type": "text/plain",
+                "file_name": "library.txt",
+                "uri": "sediment://file_library",
+                "file_size_bytes": 7,
+            })
+        );
+    }
+
     #[tokio::test]
     async fn rewrite_argument_value_for_openai_files_rewrites_scalar_path() {
         use wiremock::Mock;
@@ -309,6 +410,7 @@ mod tests {
             Some(&auth),
             "file",
             &serde_json::json!("file_report.csv"),
+            /*upload_options*/ None,
         )
         .await
         .expect("rewrite should succeed");
@@ -423,6 +525,7 @@ mod tests {
             Some(&auth),
             "files",
             &serde_json::json!(["one.csv", "two.csv"]),
+            /*upload_options*/ None,
         )
         .await
         .expect("rewrite should succeed");
@@ -463,6 +566,7 @@ mod tests {
                 "file": "/definitely/missing/file.csv",
             })),
             Some(&["file".to_string()]),
+            /*upload_options*/ None,
         )
         .await
         .expect_err("missing file should fail");

codex-rs/core/src/mcp_tool_call.rs

@@ -14,6 +14,8 @@ use crate::arc_monitor::ArcMonitorOutcome;
 use crate::arc_monitor::monitor_action;
 use crate::codex::Session;
 use crate::codex::TurnContext;
+use crate::codex_apps_file_download::maybe_materialize_codex_apps_file_download_result;
+use crate::codex_apps_mcp_tools::CODEX_APPS_META_KEY;
 use crate::config::Config;
 use crate::config::edit::ConfigEdit;
 use crate::config::edit::ConfigEditsBuilder;
@@ -33,6 +35,7 @@ use crate::mcp_tool_approval_templates::render_mcp_tool_approval_template;
 use codex_analytics::AppInvocation;
 use codex_analytics::InvocationType;
 use codex_analytics::build_track_events_context;
+use codex_api::OpenAiFileUploadOptions;
 use codex_config::types::AppToolApproval;
 use codex_features::Feature;
 use codex_mcp::CODEX_APPS_MCP_SERVER_NAME;
@@ -465,6 +468,7 @@ async fn execute_mcp_tool_call(
         turn_context,
         arguments_value,
         metadata.and_then(|metadata| metadata.openai_file_input_params.as_deref()),
+        metadata.and_then(|metadata| metadata.openai_file_upload_options.as_ref()),
     )
     .await?;
     let request_meta =
@@ -475,6 +479,14 @@ async fn execute_mcp_tool_call(
         .call_tool(server, tool_name, rewritten_arguments, request_meta)
         .await
         .map_err(|e| format!("tool call error: {e:?}"))?;
+    let result = maybe_materialize_codex_apps_file_download_result(
+        sess,
+        turn_context,
+        server,
+        metadata.and_then(|metadata| metadata.codex_apps_meta.as_ref()),
+        result,
+    )
+    .await;
     sanitize_mcp_tool_result_for_model(
         turn_context
             .model_info
@@ -644,9 +656,33 @@ pub(crate) struct McpToolApprovalMetadata {
     tool_description: Option<String>,
     codex_apps_meta: Option<serde_json::Map<String, serde_json::Value>>,
     openai_file_input_params: Option<Vec<String>>,
+    openai_file_upload_options: Option<OpenAiFileUploadOptions>,
 }
 
-const MCP_TOOL_CODEX_APPS_META_KEY: &str = "_codex_apps";
+const MCP_TOOL_OPENAI_FILE_UPLOAD_CONFIG_KEY: &str = "openai/fileUploadConfig";
+
+#[derive(Debug, Clone, Deserialize)]
+struct RawOpenAiFileUploadConfig {
+    #[serde(default)]
+    store_in_library: bool,
+}
+
+fn parse_openai_file_upload_options(
+    meta: Option<&serde_json::Map<String, serde_json::Value>>,
+) -> Option<OpenAiFileUploadOptions> {
+    let raw = meta?
+        .get(MCP_TOOL_OPENAI_FILE_UPLOAD_CONFIG_KEY)
+        .cloned()
+        .and_then(|value| serde_json::from_value::<RawOpenAiFileUploadConfig>(value).ok())?;
+
+    if !raw.store_in_library {
+        return None;
+    }
+
+    Some(OpenAiFileUploadOptions {
+        store_in_library: true,
+    })
+}
 
 fn custom_mcp_tool_approval_mode(
     turn_context: &TurnContext,
@@ -688,7 +724,7 @@ fn build_mcp_tool_call_request_meta(
             metadata.and_then(|metadata| metadata.codex_apps_meta.clone())
     {
         request_meta.insert(
-            MCP_TOOL_CODEX_APPS_META_KEY.to_string(),
+            CODEX_APPS_META_KEY.to_string(),
             serde_json::Value::Object(codex_apps_meta),
         );
     }
@@ -1104,13 +1140,16 @@ pub(crate) async fn lookup_mcp_tool_metadata(
             .tool
             .meta
             .as_ref()
-            .and_then(|meta| meta.get(MCP_TOOL_CODEX_APPS_META_KEY))
+            .and_then(|meta| meta.get(CODEX_APPS_META_KEY))
             .and_then(serde_json::Value::as_object)
             .cloned(),
         openai_file_input_params: Some(declared_openai_file_input_param_names(
             tool_info.tool.meta.as_deref(),
         ))
         .filter(|params| !params.is_empty()),
+        openai_file_upload_options: parse_openai_file_upload_options(
+            tool_info.tool.meta.as_deref(),
+        ),
     })
 }
 

codex-rs/core/src/mcp_tool_call_tests.rs

@@ -61,6 +61,7 @@ fn approval_metadata(
         tool_description: tool_description.map(str::to_string),
         codex_apps_meta: None,
         openai_file_input_params: None,
+        openai_file_upload_options: None,
     }
 }
 
@@ -74,6 +75,24 @@ fn prompt_options(
     }
 }
 
+#[test]
+fn parse_openai_file_upload_options_reads_store_in_library_config() {
+    let meta = serde_json::json!({
+        "openai/fileUploadConfig": {
+            "store_in_library": true,
+        }
+    });
+
+    let parsed = parse_openai_file_upload_options(meta.as_object());
+
+    assert_eq!(
+        parsed,
+        Some(codex_api::OpenAiFileUploadOptions {
+            store_in_library: true,
+        })
+    );
+}
+
 #[test]
 fn approval_required_when_read_only_false_and_destructive() {
     let annotations = annotations(Some(false), Some(true), /*open_world*/ None);
@@ -600,6 +619,7 @@ async fn codex_apps_tool_call_request_meta_includes_turn_metadata_and_codex_apps
             .expect("_codex_apps metadata should be an object"),
         ),
         openai_file_input_params: None,
+        openai_file_upload_options: None,
     };
 
     assert_eq!(
@@ -610,7 +630,7 @@ async fn codex_apps_tool_call_request_meta_includes_turn_metadata_and_codex_apps
         ),
         Some(serde_json::json!({
             crate::X_CODEX_TURN_METADATA_HEADER: expected_turn_metadata,
-            MCP_TOOL_CODEX_APPS_META_KEY: {
+            crate::codex_apps_mcp_tools::CODEX_APPS_META_KEY: {
                 "resource_uri": "connector://calendar/tools/calendar_create_event",
                 "contains_mcp_source": true,
                 "connector_id": "calendar",
@@ -748,6 +768,7 @@ fn guardian_mcp_review_request_includes_annotations_when_present() {
         tool_description: None,
         codex_apps_meta: None,
         openai_file_input_params: None,
+        openai_file_upload_options: None,
     };
 
     let request = build_guardian_mcp_tool_review_request("call-1", &invocation, Some(&metadata));
@@ -1274,6 +1295,7 @@ async fn approve_mode_skips_when_annotations_do_not_require_approval() {
         tool_description: None,
         codex_apps_meta: None,
         openai_file_input_params: None,
+        openai_file_upload_options: None,
     };
 
     let decision = maybe_request_mcp_tool_approval(
@@ -1342,6 +1364,7 @@ async fn guardian_mode_skips_auto_when_annotations_do_not_require_approval() {
         tool_description: None,
         codex_apps_meta: None,
         openai_file_input_params: None,
+        openai_file_upload_options: None,
     };
 
     let decision = maybe_request_mcp_tool_approval(
@@ -1413,6 +1436,7 @@ async fn guardian_mode_mcp_denial_returns_rationale_message() {
         tool_description: Some("Reads calendar data.".to_string()),
         codex_apps_meta: None,
         openai_file_input_params: None,
+        openai_file_upload_options: None,
     };
 
     let decision = maybe_request_mcp_tool_approval(
@@ -1464,6 +1488,7 @@ async fn prompt_mode_waits_for_approval_when_annotations_do_not_require_approval
         tool_description: None,
         codex_apps_meta: None,
         openai_file_input_params: None,
+        openai_file_upload_options: None,
     };
 
     let mut approval_task = {
@@ -1541,6 +1566,7 @@ async fn approve_mode_blocks_when_arc_returns_interrupt_for_model() {
         tool_description: Some("Performs a risky action.".to_string()),
         codex_apps_meta: None,
         openai_file_input_params: None,
+        openai_file_upload_options: None,
     };
 
     let decision = maybe_request_mcp_tool_approval(
@@ -1611,6 +1637,7 @@ async fn custom_approve_mode_blocks_when_arc_returns_interrupt_for_model() {
         tool_description: Some("Performs a risky action.".to_string()),
         codex_apps_meta: None,
         openai_file_input_params: None,
+        openai_file_upload_options: None,
     };
 
     let decision = maybe_request_mcp_tool_approval(
@@ -1681,6 +1708,7 @@ async fn approve_mode_blocks_when_arc_returns_interrupt_without_annotations() {
         tool_description: Some("Performs a risky action.".to_string()),
         codex_apps_meta: None,
         openai_file_input_params: None,
+        openai_file_upload_options: None,
     };
 
     let decision = maybe_request_mcp_tool_approval(
@@ -1759,6 +1787,7 @@ async fn full_access_mode_skips_arc_monitor_for_all_approval_modes() {
         tool_description: Some("Performs a risky action.".to_string()),
         codex_apps_meta: None,
         openai_file_input_params: None,
+        openai_file_upload_options: None,
     };
 
     for approval_mode in [
@@ -1861,6 +1890,7 @@ async fn approve_mode_routes_arc_ask_user_to_guardian_when_guardian_reviewer_is_
         tool_description: Some("Performs a risky action.".to_string()),
         codex_apps_meta: None,
         openai_file_input_params: None,
+        openai_file_upload_options: None,
     };
 
     let decision = maybe_request_mcp_tool_approval(

codex-rs/core/src/mcp_tool_exposure.rs

@@ -6,6 +6,7 @@ use codex_mcp::ToolInfo as McpToolInfo;
 use codex_mcp::filter_non_codex_apps_mcp_tools_only;
 use codex_tools::ToolsConfig;
 
+use crate::codex_apps_mcp_tools::is_direct_exposed_codex_apps_builtin_tool_info;
 use crate::config::Config;
 use crate::connectors;
 
@@ -24,6 +25,9 @@ pub(crate) fn build_mcp_tool_exposure(
     tools_config: &ToolsConfig,
 ) -> McpToolExposure {
     let mut deferred_tools = filter_non_codex_apps_mcp_tools_only(all_mcp_tools);
+    deferred_tools.extend(filter_direct_exposed_builtin_codex_apps_tools(
+        all_mcp_tools,
+    ));
     if let Some(connectors) = connectors {
         deferred_tools.extend(filter_codex_apps_mcp_tools(
             all_mcp_tools,
@@ -45,12 +49,31 @@ pub(crate) fn build_mcp_tool_exposure(
         deferred_tools.remove(direct_tool_name);
     }
 
+    let mut direct_tools = filter_direct_exposed_builtin_codex_apps_tools(all_mcp_tools);
+    direct_tools.extend(filter_codex_apps_mcp_tools(
+        all_mcp_tools,
+        explicitly_enabled_connectors,
+        config,
+    ));
+    for direct_tool_name in direct_tools.keys() {
+        deferred_tools.remove(direct_tool_name);
+    }
     McpToolExposure {
         direct_tools,
         deferred_tools: (!deferred_tools.is_empty()).then_some(deferred_tools),
     }
 }
 
+fn filter_direct_exposed_builtin_codex_apps_tools(
+    mcp_tools: &HashMap<String, McpToolInfo>,
+) -> HashMap<String, McpToolInfo> {
+    mcp_tools
+        .iter()
+        .filter(|(_, tool)| is_direct_exposed_codex_apps_builtin_tool_info(tool))
+        .map(|(name, tool)| (name.clone(), tool.clone()))
+        .collect()
+}
+
 fn filter_codex_apps_mcp_tools(
     mcp_tools: &HashMap<String, McpToolInfo>,
     connectors: &[connectors::AppInfo],

codex-rs/core/src/tools/code_mode/mod.rs

@@ -91,7 +91,6 @@ impl CodeModeService {
         &self,
         session: &Arc<Session>,
         turn: &Arc<TurnContext>,
-        router: Arc<ToolRouter>,
         tracker: SharedTurnDiffTracker,
     ) -> Option<codex_code_mode::CodeModeTurnWorker> {
         if !turn.features.enabled(Feature::CodeMode) {
@@ -102,8 +101,13 @@ impl CodeModeService {
             session: Arc::clone(session),
             turn: Arc::clone(turn),
         };
-        let tool_runtime =
-            ToolCallRuntime::new(router, Arc::clone(session), Arc::clone(turn), tracker);
+        let nested_router = Arc::new(build_nested_router(&exec).await);
+        let tool_runtime = ToolCallRuntime::new(
+            nested_router,
+            Arc::clone(session),
+            Arc::clone(turn),
+            tracker,
+        );
         let host = Arc::new(CoreTurnHost { exec, tool_runtime });
         Some(self.inner.start_turn_worker(host))
     }