Initial commit: Add CLI tool with OpenAI integration, including file listing and echo functionalities. Introduce package.json for dependencies and scripts, and system prompt for AI behavior.

tools/echo.js

@@ -0,0 +1,15 @@
+export default {
+  type: "function", name: "echo", description: "Echoes back the input string provided", strict: true,
+  parameters: {
+    type: "object", additionalProperties: false, required: [ "input" ],
+    properties: { "input": { type: "string", description: "The text to be echoed back" } }
+  }
+};
+
+export async function run(args) {
+  const text = typeof args?.text === 'string' ? args.text : '';
+  if (!text) {
+    return { error: 'Missing required parameter: text' };
+  }
+  return { content: text };
+}