feat: add gemini tools (#120)

src/tools/impl/ReadFileGemini.ts

@@ -0,0 +1,29 @@
+/**
+ * Gemini CLI read_file tool - wrapper around Letta Code's Read tool
+ * Uses Gemini's exact schema and description
+ */
+
+import { read } from "./Read";
+
+interface ReadFileGeminiArgs {
+  file_path: string;
+  offset?: number;
+  limit?: number;
+}
+
+export async function read_file_gemini(
+  args: ReadFileGeminiArgs,
+): Promise<{ message: string }> {
+  // Adapt Gemini params to Letta Code's Read tool
+  // Gemini uses 0-based offset, Letta Code uses 1-based
+  const lettaArgs = {
+    file_path: args.file_path,
+    offset: args.offset !== undefined ? args.offset + 1 : undefined,
+    limit: args.limit,
+  };
+
+  const result = await read(lettaArgs);
+
+  // Read returns { content: string }
+  return { message: result.content };
+}