feat(mcp): Add replace_ast_node, semantic_code_search, read_directory_architecture, nvim_send_to_terminal

server/src/tools.rs

@@ -679,3 +679,24 @@ pub struct ToggleClipboardWatchModeTool {
 pub struct ReadFileSkeletonTool {
     pub file_path: String,
 }
+/// Replace a specific AST node in a file (robust structural editing)
+#[derive(Debug, Deserialize, Serialize, JsonSchema)]
+pub struct ReplaceAstNodeTool {
+    pub file_path: String,
+    pub node_type: String, // e.g., "function_item", "impl_item"
+    pub node_name: String, // e.g., "execute"
+    pub new_content: String,
+}
+
+/// Semantic code search using local vector embeddings
+#[derive(Debug, Deserialize, Serialize, JsonSchema)]
+pub struct SemanticCodeSearchTool {
+    pub query: String,
+    pub directory: Option<String>,
+}
+
+/// Get a bird's-eye view of directory architecture
+#[derive(Debug, Deserialize, Serialize, JsonSchema)]
+pub struct ReadDirectoryArchitectureTool {
+    pub directory: String,
+}