diff --git a/examples/how-tos/force-calling-a-tool-first.ipynb b/examples/how-tos/force-calling-a-tool-first.ipynb
index 269d06c1..c7a97065 100644
--- a/examples/how-tos/force-calling-a-tool-first.ipynb
+++ b/examples/how-tos/force-calling-a-tool-first.ipynb
@@ -81,17 +81,7 @@
    "metadata": {
     "lines_to_next_cell": 2
    },
-   "outputs": [
-    {
-     "name": "stderr",
-     "output_type": "stream",
-     "text": [
-      "[WARN]: You have enabled LangSmith tracing without backgrounding callbacks.\n",
-      "[WARN]: If you are not using a serverless environment where you must wait for tracing calls to finish,\n",
-      "[WARN]: we suggest setting \"process.env.LANGCHAIN_CALLBACKS_BACKGROUND=true\" to avoid additional latency.\n"
-     ]
-    }
-   ],
+   "outputs": [],
    "source": [
     "import { DynamicStructuredTool } from \"@langchain/core/tools\";\n",
     "import { z } from \"zod\";\n",
@@ -216,25 +206,21 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 7,
+   "execution_count": 6,
    "id": "3db3dd6e",
    "metadata": {
     "lines_to_next_cell": 2
    },
    "outputs": [],
    "source": [
-    "import { StateGraphArgs } from \"@langchain/langgraph\";\n",
-    "\n",
-    "interface IState {\n",
-    "  messages: BaseMessage[];\n",
-    "}\n",
+    "import { Annotation } from \"@langchain/langgraph\";\n",
+    "import { BaseMessage } from \"@langchain/core/messages\";\n",
     "\n",
-    "const agentState: StateGraphArgs<IState>[\"channels\"] = {\n",
-    "  messages: {\n",
-    "    value: (x: BaseMessage[], y: BaseMessage[]) => x.concat(y),\n",
-    "    default: () => [],\n",
-    "  },\n",
-    "};"
+    "const AgentState = Annotation.Root({\n",
+    "  messages: Annotation<BaseMessage[]>({\n",
+    "    reducer: (x, y) => x.concat(y),\n",
+    "  }),\n",
+    "});"
    ]
   },
   {
@@ -271,7 +257,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 8,
+   "execution_count": 7,
    "id": "eee5adc0",
    "metadata": {},
    "outputs": [],
@@ -281,7 +267,7 @@
     "import { concat } from \"@langchain/core/utils/stream\";\n",
     "\n",
     "// Define logic that will be used to determine which conditional edge to go down\n",
-    "const shouldContinue = (state: IState) => {\n",
+    "const shouldContinue = (state: typeof AgentState.State) => {\n",
     "  const { messages } = state;\n",
     "  const lastMessage = messages[messages.length - 1] as AIMessage;\n",
     "  // If there is no function call, then we finish\n",
@@ -294,7 +280,7 @@
     "\n",
     "// Define the function that calls the model\n",
     "const callModel = async (\n",
-    "  state: IState,\n",
+    "  state: typeof AgentState.State,\n",
     "  config?: RunnableConfig,\n",
     ") => {\n",
     "  const { messages } = state;\n",
@@ -326,7 +312,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 9,
+   "execution_count": 8,
    "id": "e9104fc7",
    "metadata": {
     "lines_to_next_cell": 2
@@ -334,7 +320,7 @@
    "outputs": [],
    "source": [
     "// This is the new first - the first call of the model we want to explicitly hard-code some action\n",
-    "const firstModel = async (state: IState) => {\n",
+    "const firstModel = async (state: typeof AgentState.State) => {\n",
     "  const humanInput = state.messages[state.messages.length - 1].content || \"\";\n",
     "  return {\n",
     "    messages: [\n",
@@ -371,7 +357,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 10,
+   "execution_count": 9,
    "id": "de6da918",
    "metadata": {
     "lines_to_next_cell": 2
@@ -381,7 +367,7 @@
     "import { END, START, StateGraph } from \"@langchain/langgraph\";\n",
     "\n",
     "// Define a new graph\n",
-    "const workflow = new StateGraph<IState>({ channels: agentState })\n",
+    "const workflow = new StateGraph(AgentState)\n",
     "  // Define the new entrypoint\n",
     "  .addNode(\"first_agent\", firstModel)\n",
     "  // Define the two nodes we will cycle between\n",
@@ -436,7 +422,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 11,
+   "execution_count": 10,
    "id": "acaade41",
    "metadata": {
     "lines_to_next_cell": 2
@@ -446,13 +432,69 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "{ first_agent: { messages: [ \u001b[36m[AIMessage]\u001b[39m ] } }\n",
+      "{\n",
+      "  first_agent: {\n",
+      "    messages: [\n",
+      "      AIMessage {\n",
+      "        \"content\": \"\",\n",
+      "        \"additional_kwargs\": {},\n",
+      "        \"response_metadata\": {},\n",
+      "        \"tool_calls\": [\n",
+      "          {\n",
+      "            \"name\": \"search\",\n",
+      "            \"args\": {\n",
+      "              \"query\": \"what is the weather in sf\"\n",
+      "            },\n",
+      "            \"id\": \"tool_abcd123\"\n",
+      "          }\n",
+      "        ],\n",
+      "        \"invalid_tool_calls\": []\n",
+      "      }\n",
+      "    ]\n",
+      "  }\n",
+      "}\n",
       "-----\n",
       "\n",
-      "{ action: { messages: [ \u001b[36m[ToolMessage]\u001b[39m ] } }\n",
+      "{\n",
+      "  action: {\n",
+      "    messages: [\n",
+      "      ToolMessage {\n",
+      "        \"content\": \"Cold, with a low of 13 ℃\",\n",
+      "        \"name\": \"search\",\n",
+      "        \"additional_kwargs\": {},\n",
+      "        \"response_metadata\": {},\n",
+      "        \"tool_call_id\": \"tool_abcd123\"\n",
+      "      }\n",
+      "    ]\n",
+      "  }\n",
+      "}\n",
       "-----\n",
       "\n",
-      "{ agent: { messages: [ \u001b[36m[AIMessageChunk]\u001b[39m ] } }\n",
+      "{\n",
+      "  agent: {\n",
+      "    messages: [\n",
+      "      AIMessageChunk {\n",
+      "        \"id\": \"chatcmpl-9y562g16z0MUNBJcS6nKMsDuFMRsS\",\n",
+      "        \"content\": \"The current weather in San Francisco is cold, with a low of 13°C.\",\n",
+      "        \"additional_kwargs\": {},\n",
+      "        \"response_metadata\": {\n",
+      "          \"prompt\": 0,\n",
+      "          \"completion\": 0,\n",
+      "          \"finish_reason\": \"stop\",\n",
+      "          \"system_fingerprint\": \"fp_3aa7262c27fp_3aa7262c27fp_3aa7262c27fp_3aa7262c27fp_3aa7262c27fp_3aa7262c27fp_3aa7262c27fp_3aa7262c27fp_3aa7262c27fp_3aa7262c27fp_3aa7262c27fp_3aa7262c27fp_3aa7262c27fp_3aa7262c27fp_3aa7262c27fp_3aa7262c27fp_3aa7262c27fp_3aa7262c27fp_3aa7262c27\"\n",
+      "        },\n",
+      "        \"tool_calls\": [],\n",
+      "        \"tool_call_chunks\": [],\n",
+      "        \"invalid_tool_calls\": [],\n",
+      "        \"usage_metadata\": {\n",
+      "          \"input_tokens\": 104,\n",
+      "          \"output_tokens\": 18,\n",
+      "          \"total_tokens\": 122\n",
+      "        }\n",
+      "      }\n",
+      "    ]\n",
+      "  }\n",
+      "}\n",
       "-----\n",
       "\n"
      ]
@@ -470,14 +512,6 @@
     "  console.log(\"-----\\n\");\n",
     "}"
    ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "241e2fc9-9bee-4f2c-a077-09472a7b5613",
-   "metadata": {},
-   "outputs": [],
-   "source": []
   }
  ],
  "metadata": {
@@ -485,9 +519,9 @@
    "encoding": "# -*- coding: utf-8 -*-"
   },
   "kernelspec": {
-   "display_name": "Deno",
+   "display_name": "TypeScript",
    "language": "typescript",
-   "name": "deno"
+   "name": "tslab"
   },
   "language_info": {
    "codemirror_mode": {