fix: MCPCをvendored fork化しMCP準拠と接続安定性を改善

- Git submoduleを廃止してMCPCを直接管理
- Windowsで254リクエスト付近に発生する切断を修正
- JSON-RPC 2.0エラー応答を標準化
- tool schemaとruntimeの必須・任意引数を一致
- 1000回連続呼び出しの回帰テストを追加

1 files changed, 5 insertions, 5 deletions

diff --git a/src/mcp/tools/delete_message.c b/src/mcp/tools/delete_message.c
index ae924d7..8b6e8f9 100644
--- a/src/mcp/tools/delete_message.c
+++ b/src/mcp/tools/delete_message.c
@@ -14,14 +14,15 @@ call_delete_message(const mcpc_tool_t *tool, mcpc_ucbr_t *result)
   char *message_id = tiny_mcp_tool_get_string(tool, "message_id", TINY_MESSAGE_ID_LENGTH);
   char *session = tiny_mcp_tool_get_string(tool, "session_id", TINY_SESSION_ID_MAX);
   tiny_store_status_t status;
-  if (!context || !message_id || !session || !tiny_message_id_valid(message_id))
+  if (!context || !message_id || !tiny_message_id_valid(message_id))
     {
       tiny_mcp_tool_add_error(
           result, "VALIDATION_ERROR", "message_id must be a canonical 26-character ULID");
     }
   else
     {
-      status = tiny_store_delete(context->store, message_id, session[0] ? session : NULL);
+      status
+          = tiny_store_delete(context->store, message_id, session && session[0] ? session : NULL);
       if (status != TINY_STORE_OK && status != TINY_STORE_NOT_FOUND)
         {
           tiny_mcp_tool_add_error(
@@ -43,8 +44,7 @@ bool
 tiny_mcp_register_delete_message(mcpc_server_t *server)
 {
   mcpc_tool_t *tool = tiny_mcp_tool_new("delete_message", "Delete a message", call_delete_message);
-  return tool && tiny_mcp_tool_add_property(tool, "message_id", "Message ULID", MCPC_U8STR)
-         && tiny_mcp_tool_add_property(
-             tool, "session_id", "Session ID; empty if omitted", MCPC_U8STR)
+  return tool && tiny_mcp_tool_add_property(tool, "message_id", "Message ULID", MCPC_U8STR, true)
+         && tiny_mcp_tool_add_property(tool, "session_id", "Optional session ID", MCPC_U8STR, false)
          && mcpc_server_add_tool(server, tool) == MCPC_EC_0;
 }