refactor: MCP層をmcpc APIベースに刷新

- 独自JSON-RPC処理をmcpcへ置き換え
- 各MCPツールを個別ソースへ分離
- 共通コンテキストと登録処理を整理
- mcpc互換修正と統合テストを更新

1 files changed, 49 insertions, 0 deletions

diff --git a/src/mcp/tools/get_system_health.c b/src/mcp/tools/get_system_health.c
new file mode 100644
index 0000000..eb02090
--- /dev/null
+++ b/src/mcp/tools/get_system_health.c
@@ -0,0 +1,49 @@
+#include "mcp/tools/common/registry.h"
+
+#include "mcp/tools/common/common.h"
+#include "mcp/tools/common/context.h"
+
+static void
+call_get_system_health(const mcpc_tool_t *tool, mcpc_ucbr_t *result)
+{
+  tiny_mcp_tools_context_t *context = tiny_mcp_tools_context_current();
+  tiny_store_health_t health;
+  tiny_json_buffer_t json;
+  (void)tool;
+  if (!context)
+    {
+      tiny_mcp_tool_add_error(result, "INTERNAL_ERROR", "tool context is unavailable");
+      return;
+    }
+  tiny_store_health(context->store, &health);
+  tiny_json_init(&json);
+  tiny_json_raw(&json, "{\"status\":");
+  tiny_json_string(&json, health.last_error[0] ? "DEGRADED" : "OK");
+  tiny_json_raw(&json, ",\"format_version\":1,\"log_size\":");
+  tiny_json_u64(&json, health.log_size);
+  tiny_json_raw(&json, ",\"snapshot_size\":");
+  tiny_json_u64(&json, health.snapshot_size);
+  tiny_json_raw(&json, ",\"active_messages\":");
+  tiny_json_u64(&json, health.active_messages);
+  tiny_json_raw(&json, ",\"deleted_messages\":");
+  tiny_json_u64(&json, health.deleted_messages);
+  tiny_json_raw(&json, ",\"last_sequence\":");
+  tiny_json_u64(&json, health.last_sequence);
+  tiny_json_raw(&json, ",\"recovered_tail\":");
+  tiny_json_raw(&json, health.recovered_tail ? "true" : "false");
+  tiny_json_raw(&json, ",\"snapshot_valid\":");
+  tiny_json_raw(&json, health.snapshot_valid ? "true" : "false");
+  tiny_json_raw(&json, ",\"last_error\":");
+  tiny_json_string(&json, health.last_error);
+  tiny_json_raw(&json, "}");
+  tiny_mcp_tool_add_json(result, &json);
+  tiny_json_free(&json);
+}
+
+bool
+tiny_mcp_register_get_system_health(mcpc_server_t *server)
+{
+  mcpc_tool_t *tool
+      = tiny_mcp_tool_new("get_system_health", "Report storage health", call_get_system_health);
+  return tool && mcpc_server_add_tool(server, tool) == MCPC_EC_0;
+}