feat: Open Code agent

agent/open-code/nodes/planner.ts

@@ -0,0 +1,25 @@
+import { v4 as uuidv4 } from "uuid";
+import { AIMessage } from "@langchain/langgraph-sdk";
+import { OpenCodeState, OpenCodeUpdate } from "../types";
+
+export async function planner(state: OpenCodeState): Promise<OpenCodeUpdate> {
+  const aiMessage: AIMessage = {
+    type: "ai",
+    id: uuidv4(),
+    content: "",
+    tool_calls: [
+      {
+        name: "update_file",
+        args: {
+          args: {
+            new_file_content: "ADD_CODE_HERE"
+          },
+        },
+        id: uuidv4(),
+        type: "tool_call",
+      }
+    ]
+  }
+
+  const toolMessage = {}
+}