From 13ce49599f0ad45a372e43a9ed7b45ca4e2fd2c9 Mon Sep 17 00:00:00 2001
From: kdletters <61648117+kdletters@users.noreply.github.com>
Date: Fri, 2 Oct 2026 14:55:27 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8D=20AGC=20MCP=20=E9=80=9A?=
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- direct_tools_mcp：HTTP 入口对没有 id 的 JSON-RPC 通知（notifications/initialized）返回 202 空体，不再按错误回 400
- 之前 Claude Code 的 MCP 握手被 400 打断，把 agc 服务器标记为 failed，模型请求里一个工具都没有（实测 tools=0，修复后 tools=60）
---
 .../src-tauri/src/agent/direct_tools_mcp.rs          | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/direct_tools_mcp.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/direct_tools_mcp.rs
index 95feedd00..99f4c3506 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/direct_tools_mcp.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/direct_tools_mcp.rs
@@ -2,6 +2,7 @@ use super::*;
 use axum::extract::DefaultBodyLimit;
 use axum::extract::State as AxumState;
 use axum::http::{HeaderMap, StatusCode};
+use axum::response::IntoResponse;
 use axum::routing::post;
 use axum::Json;
 use axum::Router;
@@ -2090,7 +2091,7 @@ async fn handle_external_mcp_http_request(
     AxumState(state): AxumState<ExternalMcpHttpState>,
     headers: HeaderMap,
     Json(request): Json<Value>,
-) -> Result<Json<Value>, StatusCode> {
+) -> Result<axum::response::Response, StatusCode> {
     if !external_mcp_authorized(&headers, &state.token) {
         return Err(StatusCode::UNAUTHORIZED);
     }
@@ -2107,6 +2108,13 @@ async fn handle_external_mcp_http_request(
         .in_flight
         .try_acquire()
         .map_err(|_| StatusCode::TOO_MANY_REQUESTS)?;
+    // JSON-RPC 通知（没有 `id`）没有响应体：MCP 客户端在 `initialize` 之后一定会发
+    // `notifications/initialized`，按错误回 400 会被判成握手失败，整个服务器就被标记
+    // 成 `failed`、一个工具都不广告（真实案例：2026-10-02 的 cc DirectProject 因此
+    // 拿到 0 个工具）。规范要求的应答是 202 Accepted（空体）。
+    if request.get("id").is_none() {
+        return Ok(StatusCode::ACCEPTED.into_response());
+    }
     let response = EXTERNAL_MCP_BRIDGE_URL
         .scope(
             state.bridge_url.clone(),
@@ -2114,7 +2122,7 @@ async fn handle_external_mcp_http_request(
         )
         .await
         .ok_or(StatusCode::BAD_REQUEST)?;
-    Ok(Json(response))
+    Ok(Json(response).into_response())
 }
 
 pub(crate) async fn start_external_mcp_loopback(