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, 88 insertions, 0 deletions

diff --git a/src/mcp/tools/common/context.c b/src/mcp/tools/common/context.c
new file mode 100644
index 0000000..1a469e0
--- /dev/null
+++ b/src/mcp/tools/common/context.c
@@ -0,0 +1,88 @@
+#include "mcp/tools/common/context.h"
+
+#include <stdlib.h>
+
+#include "base/allocator.h"
+
+/* mcpc's callback API has no user-data parameter. The stdio server is single-instance. */
+static tiny_mcp_tools_context_t *active_context;
+
+tiny_search_index_t *
+tiny_mcp_tools_build_search_index(const tiny_store_t *store)
+{
+  tiny_search_index_t *index = tiny_search_index_create();
+  size_t position;
+  if (!index)
+    {
+      return NULL;
+    }
+  for (position = 0; position < tiny_store_entry_count(store); ++position)
+    {
+      if (!tiny_search_index_add(index, &tiny_store_entry(store, position)->message, position))
+        {
+          tiny_search_index_free(index);
+          return NULL;
+        }
+    }
+  return index;
+}
+
+tiny_mcp_tools_context_t *
+tiny_mcp_tools_context_new(tiny_store_t *store)
+{
+  tiny_mcp_tools_context_t *context;
+  if (!store)
+    {
+      return NULL;
+    }
+  context = malloc(sizeof(*context));
+  if (!context)
+    {
+      return NULL;
+    }
+  context->store = store;
+  context->search_index = tiny_mcp_tools_build_search_index(store);
+  if (!context->search_index)
+    {
+      free(context);
+      return NULL;
+    }
+  return context;
+}
+
+void
+tiny_mcp_tools_context_free(tiny_mcp_tools_context_t *context)
+{
+  if (!context)
+    {
+      return;
+    }
+  tiny_search_index_free(context->search_index);
+  free(context);
+}
+
+bool
+tiny_mcp_tools_context_activate(tiny_mcp_tools_context_t *context)
+{
+  if (!context || active_context)
+    {
+      return false;
+    }
+  active_context = context;
+  return true;
+}
+
+void
+tiny_mcp_tools_context_deactivate(tiny_mcp_tools_context_t *context)
+{
+  if (active_context == context)
+    {
+      active_context = NULL;
+    }
+}
+
+tiny_mcp_tools_context_t *
+tiny_mcp_tools_context_current(void)
+{
+  return active_context;
+}