implement components

agent/agent.tsx

@@ -6,9 +6,11 @@ import { stockbrokerGraph } from "./stockbroker";
 import { ChatOpenAI } from "@langchain/openai";
 import { tripPlannerGraph } from "./trip-planner";
 import { formatMessages } from "./utils/format-messages";
+import { graph as openCodeGraph } from "./open-code";
 
 const allToolDescriptions = `- stockbroker: can fetch the price of a ticker, purchase/sell a ticker, or get the user's portfolio
-- tripPlanner: helps the user plan their trip. it can suggest restaurants, and places to stay in any given location.`;
+- tripPlanner: helps the user plan their trip. it can suggest restaurants, and places to stay in any given location.
+- openCode: can write code for the user. call this tool when the user asks you to write code`;
 
 async function router(
   state: GenerativeUIState,
@@ -19,7 +21,7 @@ ${allToolDescriptions}
 `;
   const routerSchema = z.object({
     route: z
-      .enum(["stockbroker", "tripPlanner", "generalInput"])
+      .enum(["stockbroker", "tripPlanner", "openCode", "generalInput"])
       .describe(routerDescription),
   });
   const routerTool = {
@@ -73,7 +75,7 @@ Please pick the proper route based on the most recent message, in the context of
 
 function handleRoute(
   state: GenerativeUIState,
-): "stockbroker" | "tripPlanner" | "generalInput" {
+): "stockbroker" | "tripPlanner" | "openCode" | "generalInput" {
   return state.next;
 }
 
@@ -104,16 +106,19 @@ const builder = new StateGraph(GenerativeUIAnnotation)
   .addNode("router", router)
   .addNode("stockbroker", stockbrokerGraph)
   .addNode("tripPlanner", tripPlannerGraph)
+  .addNode("openCode", openCodeGraph)
   .addNode("generalInput", handleGeneralInput)
 
   .addConditionalEdges("router", handleRoute, [
     "stockbroker",
     "tripPlanner",
+    "openCode",
     "generalInput",
   ])
   .addEdge(START, "router")
   .addEdge("stockbroker", END)
   .addEdge("tripPlanner", END)
+  .addEdge("openCode", END)
   .addEdge("generalInput", END);
 
 export const graph = builder.compile();

agent/open-code/index.ts

@@ -1,21 +1,14 @@
 import { END, START, StateGraph } from "@langchain/langgraph";
-import { OpenCodeAnnotation, OpenCodeState } from "./types";
+import { OpenCodeAnnotation } from "./types";
 import { planner } from "./nodes/planner";
-import { interrupt } from "./nodes/interrupt";
 import { executor } from "./nodes/executor";
 
-function handleRoutingFromExecutor(state: OpenCodeState): "executor" | "interrupt" {
-  const lastAIMessage = state.messages.findLast((m) => m.getType() === "ai");
-  if (lastAIMessage)
-}
-
-function handleRoutingFromInterrupt(state: OpenCodeState): "executor" | typeof END {}
-
 const workflow = new StateGraph(OpenCodeAnnotation)
   .addNode("planner", planner)
   .addNode("executor", executor)
-  .addNode("interrupt", interrupt)
   .addEdge(START, "planner")
   .addEdge("planner", "executor")
-  .addConditionalEdges("executor", handleRoutingFromExecutor, ["executor", "interrupt"])
+  .addEdge("executor", END);
-  .addConditionalEdges("interrupt", handleRoutingFromInterrupt, ["executor", END])
+
+export const graph = workflow.compile();
+graph.name = "Open Code Graph";

agent/open-code/nodes/executor.ts

@@ -1,5 +1,101 @@
+import fs from "fs/promises";
+import { v4 as uuidv4 } from "uuid";
+import { AIMessage } from "@langchain/langgraph-sdk";
 import { OpenCodeState, OpenCodeUpdate } from "../types";
+import { LangGraphRunnableConfig } from "@langchain/langgraph";
+import ComponentMap from "../../uis";
+import { typedUi } from "@langchain/langgraph-sdk/react-ui/server";
+import { PLAN } from "./planner";
 
-export async function executor(state: OpenCodeState): Promise<OpenCodeUpdate> {
+export async function executor(
-  throw new Error("Not implemented" + state);
+  state: OpenCodeState,
+  config: LangGraphRunnableConfig,
+): Promise<OpenCodeUpdate> {
+  const ui = typedUi<typeof ComponentMap>(config);
+
+  const numOfUpdateFileCalls = state.messages.filter(
+    (m) =>
+      m.getType() === "ai" &&
+      (m as unknown as AIMessage).tool_calls?.some(
+        (tc) => tc.name === "update_file",
+      ),
+  ).length;
+  const planItem = PLAN[numOfUpdateFileCalls - 1];
+
+  let updateFileContents = "";
+  switch (numOfUpdateFileCalls) {
+    case 0:
+      updateFileContents = await fs.readFile(
+        "agent/open-code/nodes/plan-code/step-1.txt",
+        "utf-8",
+      );
+      break;
+    case 1:
+      updateFileContents = await fs.readFile(
+        "agent/open-code/nodes/plan-code/step-2.txt",
+        "utf-8",
+      );
+      break;
+    case 2:
+      updateFileContents = await fs.readFile(
+        "agent/open-code/nodes/plan-code/step-3.txt",
+        "utf-8",
+      );
+      break;
+    case 3:
+      updateFileContents = await fs.readFile(
+        "agent/open-code/nodes/plan-code/step-4.txt",
+        "utf-8",
+      );
+      break;
+    case 4:
+      updateFileContents = await fs.readFile(
+        "agent/open-code/nodes/plan-code/step-5.txt",
+        "utf-8",
+      );
+      break;
+    case 5:
+      updateFileContents = await fs.readFile(
+        "agent/open-code/nodes/plan-code/step-6.txt",
+        "utf-8",
+      );
+      break;
+    default:
+      updateFileContents = "";
+  }
+
+  if (!updateFileContents) {
+    throw new Error("No file updates found!");
+  }
+
+  const toolCallId = uuidv4();
+  const aiMessage: AIMessage = {
+    type: "ai",
+    id: uuidv4(),
+    content: "",
+    tool_calls: [
+      {
+        name: "update_file",
+        args: {
+          args: {
+            new_file_content: updateFileContents,
+          },
+        },
+        id: toolCallId,
+        type: "tool_call",
+      },
+    ],
+  };
+
+  ui.write("proposed-change", {
+    toolCallId,
+    change: updateFileContents,
+    planItem,
+  });
+
+  return {
+    messages: [aiMessage],
+    ui: ui.collect as OpenCodeUpdate["ui"],
+    timestamp: Date.now(),
+  };
 }

agent/open-code/nodes/interrupt.ts

@@ -1,5 +0,0 @@
-import { OpenCodeState, OpenCodeUpdate } from "../types";
-
-export async function interrupt(state: OpenCodeState): Promise<OpenCodeUpdate> {
-  throw new Error("Not implemented" + state);
-}

agent/open-code/nodes/plan-code/step-1.txt

@@ -0,0 +1,5 @@
+```bash
+npx create-react-app todo-app --template typescript
+cd todo-app
+mkdir -p src/{components,styles,utils}
+```

agent/open-code/nodes/plan-code/step-2.txt

@@ -0,0 +1,21 @@
+```tsx
+// src/components/TodoItem.tsx
+import React from 'react';
+import styles from '../styles/TodoItem.module.css';
+
+interface TodoItemProps {
+  id: string;
+  text: string;
+  completed: boolean;
+  onToggle: (id: string) => void;
+  onDelete: (id: string) => void;
+}
+
+export const TodoItem: React.FC<TodoItemProps> = ({ id, text, completed, onToggle, onDelete }) => (
+  <div className={styles.todoItem}>
+    <input type='checkbox' checked={completed} onChange={() => onToggle(id)} />
+    <span className={completed ? styles.completed : ''}>{text}</span>
+    <button onClick={() => onDelete(id)}>Delete</button>
+  </div>
+);
+```

agent/open-code/nodes/plan-code/step-3.txt

@@ -0,0 +1,22 @@
+```tsx
+// src/context/TodoContext.tsx
+import React, { createContext, useContext, useReducer } from 'react';
+
+type Todo = { id: string; text: string; completed: boolean; };
+
+type TodoState = { todos: Todo[]; };
+type TodoAction = 
+  | { type: 'ADD_TODO'; payload: string }
+  | { type: 'TOGGLE_TODO'; payload: string }
+  | { type: 'DELETE_TODO'; payload: string };
+
+const TodoContext = createContext<{
+  state: TodoState;
+  dispatch: React.Dispatch<TodoAction>;
+} | undefined>(undefined);
+
+export const TodoProvider: React.FC<{ children: React.ReactNode }> = ({ children }) => {
+  const [state, dispatch] = useReducer(todoReducer, { todos: [] });
+  return <TodoContext.Provider value={{ state, dispatch }}>{children}</TodoContext.Provider>;
+};
+```

agent/open-code/nodes/plan-code/step-4.txt

@@ -0,0 +1,33 @@
+```tsx
+// src/components/AddTodo.tsx
+import React, { useState } from 'react';
+import styles from '../styles/AddTodo.module.css';
+
+export const AddTodo: React.FC<{ onAdd: (text: string) => void }> = ({ onAdd }) => {
+  const [text, setText] = useState('');
+  const [error, setError] = useState('');
+
+  const handleSubmit = (e: React.FormEvent) => {
+    e.preventDefault();
+    if (!text.trim()) {
+      setError('Todo text cannot be empty');
+      return;
+    }
+    onAdd(text.trim());
+    setText('');
+    setError('');
+  };
+
+  return (
+    <form onSubmit={handleSubmit} className={styles.form}>
+      <input
+        value={text}
+        onChange={(e) => setText(e.target.value)}
+        placeholder='Add a new todo'
+      />
+      {error && <div className={styles.error}>{error}</div>}
+      <button type='submit'>Add Todo</button>
+    </form>
+  );
+};
+```

agent/open-code/nodes/plan-code/step-5.txt

@@ -0,0 +1,22 @@
+```tsx
+// src/components/TodoFilters.tsx
+import React from 'react';
+
+type FilterType = 'all' | 'active' | 'completed';
+
+export const TodoFilters: React.FC<{
+  currentFilter: FilterType;
+  onFilterChange: (filter: FilterType) => void;
+  onSortChange: (ascending: boolean) => void;
+}> = ({ currentFilter, onFilterChange, onSortChange }) => (
+  <div>
+    <select value={currentFilter} onChange={(e) => onFilterChange(e.target.value as FilterType)}>
+      <option value='all'>All</option>
+      <option value='active'>Active</option>
+      <option value='completed'>Completed</option>
+    </select>
+    <button onClick={() => onSortChange(true)}>Sort A-Z</button>
+    <button onClick={() => onSortChange(false)}>Sort Z-A</button>
+  </div>
+);
+```

agent/open-code/nodes/plan-code/step-6.txt

@@ -0,0 +1,13 @@
+```tsx
+// src/utils/storage.ts
+const STORAGE_KEY = 'todos';
+
+export const saveTodos = (todos: Todo[]) => {
+  localStorage.setItem(STORAGE_KEY, JSON.stringify(todos));
+};
+
+export const loadTodos = (): Todo[] => {
+  const stored = localStorage.getItem(STORAGE_KEY);
+  return stored ? JSON.parse(stored) : [];
+};
+```

agent/open-code/nodes/planner.ts

@@ -1,25 +1,60 @@
 import { v4 as uuidv4 } from "uuid";
-import { AIMessage } from "@langchain/langgraph-sdk";
+import { AIMessage, ToolMessage } from "@langchain/langgraph-sdk";
 import { OpenCodeState, OpenCodeUpdate } from "../types";
+import { DO_NOT_RENDER_ID_PREFIX } from "@/lib/ensure-tool-responses";
+import { LangGraphRunnableConfig } from "@langchain/langgraph";
+import ComponentMap from "../../uis";
+import { typedUi } from "@langchain/langgraph-sdk/react-ui/server";
 
-export async function planner(state: OpenCodeState): Promise<OpenCodeUpdate> {
+export const PLAN = [
+  "Set up project scaffolding using Create React App and implement basic folder structure for components, styles, and utilities.",
+  "Create reusable UI components for TodoItem, including styling with CSS modules.",
+  "Implement state management using React Context to handle todo items, including actions for adding, updating, and deleting todos.",
+  "Add form functionality for creating new todos with input validation and error handling.",
+  "Create filtering and sorting capabilities to allow users to view completed, active, or all todos.",
+  "Implement local storage integration to persist todo items between page refreshes.",
+];
+
+export async function planner(
+  _state: OpenCodeState,
+  config: LangGraphRunnableConfig,
+): Promise<OpenCodeUpdate> {
+  const ui = typedUi<typeof ComponentMap>(config);
+
+  const toolCallId = uuidv4();
   const aiMessage: AIMessage = {
     type: "ai",
     id: uuidv4(),
-    content: "",
+    content: "I've come up with a detailed plan for building the todo app.",
     tool_calls: [
       {
-        name: "update_file",
+        name: "plan",
         args: {
           args: {
-            new_file_content: "ADD_CODE_HERE"
+            plan: PLAN,
           },
         },
-        id: uuidv4(),
+        id: toolCallId,
         type: "tool_call",
-      }
+      },
-    ]
+    ],
-  }
+  };
 
-  const toolMessage = {}
+  ui.write("code-plan", {
+    toolCallId,
+    plan: PLAN,
+  });
+
+  const toolMessage: ToolMessage = {
+    type: "tool",
+    id: `${DO_NOT_RENDER_ID_PREFIX}${uuidv4()}`,
+    tool_call_id: toolCallId,
+    content: "User has approved the plan.",
+  };
+
+  return {
+    messages: [aiMessage, toolMessage],
+    ui: ui.collect as OpenCodeUpdate["ui"],
+    timestamp: Date.now(),
+  };
 }

agent/open-code/types.ts

@@ -5,7 +5,6 @@ export const OpenCodeAnnotation = Annotation.Root({
   messages: GenerativeUIAnnotation.spec.messages,
   ui: GenerativeUIAnnotation.spec.ui,
   timestamp: GenerativeUIAnnotation.spec.timestamp,
-  next: Annotation<"executor" | "interrupt">
 });
 
 export type OpenCodeState = typeof OpenCodeAnnotation.State;

agent/types.ts

@@ -12,7 +12,9 @@ export const GenerativeUIAnnotation = Annotation.Root({
     UIMessage | RemoveUIMessage | (UIMessage | RemoveUIMessage)[]
   >({ default: () => [], reducer: uiMessageReducer }),
   timestamp: Annotation<number>,
-  next: Annotation<"stockbroker" | "tripPlanner" | "generalInput">(),
+  next: Annotation<
+    "stockbroker" | "tripPlanner" | "openCode" | "generalInput"
+  >(),
 });
 
 export type GenerativeUIState = typeof GenerativeUIAnnotation.State;

agent/uis/index.tsx

@@ -5,6 +5,8 @@ import BookAccommodation from "./trip-planner/book-accommodation";
 import RestaurantsList from "./trip-planner/restaurants-list";
 import BookRestaurant from "./trip-planner/book-restaurant";
 import BuyStock from "./stockbroker/buy-stock";
+import Plan from "./open-code/plan";
+import ProposedChange from "./open-code/proposed-change";
 
 const ComponentMap = {
   "stock-price": StockPrice,
@@ -14,5 +16,7 @@ const ComponentMap = {
   "restaurants-list": RestaurantsList,
   "book-restaurant": BookRestaurant,
   "buy-stock": BuyStock,
+  "code-plan": Plan,
+  "proposed-change": ProposedChange,
 } as const;
 export default ComponentMap;

agent/uis/open-code/plan/index.css

@@ -0,0 +1 @@
+@import "tailwindcss";

agent/uis/open-code/plan/index.tsx

@@ -0,0 +1,21 @@
+import "./index.css";
+
+interface PlanProps {
+  toolCallId: string;
+  plan: string[];
+}
+
+export default function Plan(props: PlanProps) {
+  return (
+    <div className="flex flex-col gap-4 w-full max-w-xl p-4 border-[1px] rounded-xl border-slate-500">
+      <p className="text-lg font-medium">Plan</p>
+      <div className="flex flex-col gap-2">
+        {props.plan.map((step, index) => (
+          <p key={index} className="font-mono">
+            {index + 1}. {step}
+          </p>
+        ))}
+      </div>
+    </div>
+  );
+}

agent/uis/open-code/proposed-change/index.css

@@ -0,0 +1,122 @@
+@import "tailwindcss";
+
+@custom-variant dark (&:is(.dark *));
+
+:root {
+  --background: oklch(1 0 0);
+  --foreground: oklch(0.145 0 0);
+  --card: oklch(1 0 0);
+  --card-foreground: oklch(0.145 0 0);
+  --popover: oklch(1 0 0);
+  --popover-foreground: oklch(0.145 0 0);
+  --primary: oklch(0.205 0 0);
+  --primary-foreground: oklch(0.985 0 0);
+  --secondary: oklch(0.97 0 0);
+  --secondary-foreground: oklch(0.205 0 0);
+  --muted: oklch(0.97 0 0);
+  --muted-foreground: oklch(0.556 0 0);
+  --accent: oklch(0.97 0 0);
+  --accent-foreground: oklch(0.205 0 0);
+  --destructive: oklch(0.577 0.245 27.325);
+  --destructive-foreground: oklch(0.577 0.245 27.325);
+  --border: oklch(0.922 0 0);
+  --input: oklch(0.922 0 0);
+  --ring: oklch(0.708 0 0);
+  --chart-1: oklch(0.646 0.222 41.116);
+  --chart-2: oklch(0.6 0.118 184.704);
+  --chart-3: oklch(0.398 0.07 227.392);
+  --chart-4: oklch(0.828 0.189 84.429);
+  --chart-5: oklch(0.769 0.188 70.08);
+  --radius: 0.625rem;
+  --sidebar: oklch(0.985 0 0);
+  --sidebar-foreground: oklch(0.145 0 0);
+  --sidebar-primary: oklch(0.205 0 0);
+  --sidebar-primary-foreground: oklch(0.985 0 0);
+  --sidebar-accent: oklch(0.97 0 0);
+  --sidebar-accent-foreground: oklch(0.205 0 0);
+  --sidebar-border: oklch(0.922 0 0);
+  --sidebar-ring: oklch(0.708 0 0);
+}
+
+.dark {
+  --background: oklch(0.145 0 0);
+  --foreground: oklch(0.985 0 0);
+  --card: oklch(0.145 0 0);
+  --card-foreground: oklch(0.985 0 0);
+  --popover: oklch(0.145 0 0);
+  --popover-foreground: oklch(0.985 0 0);
+  --primary: oklch(0.985 0 0);
+  --primary-foreground: oklch(0.205 0 0);
+  --secondary: oklch(0.269 0 0);
+  --secondary-foreground: oklch(0.985 0 0);
+  --muted: oklch(0.269 0 0);
+  --muted-foreground: oklch(0.708 0 0);
+  --accent: oklch(0.269 0 0);
+  --accent-foreground: oklch(0.985 0 0);
+  --destructive: oklch(0.396 0.141 25.723);
+  --destructive-foreground: oklch(0.637 0.237 25.331);
+  --border: oklch(0.269 0 0);
+  --input: oklch(0.269 0 0);
+  --ring: oklch(0.439 0 0);
+  --chart-1: oklch(0.488 0.243 264.376);
+  --chart-2: oklch(0.696 0.17 162.48);
+  --chart-3: oklch(0.769 0.188 70.08);
+  --chart-4: oklch(0.627 0.265 303.9);
+  --chart-5: oklch(0.645 0.246 16.439);
+  --sidebar: oklch(0.205 0 0);
+  --sidebar-foreground: oklch(0.985 0 0);
+  --sidebar-primary: oklch(0.488 0.243 264.376);
+  --sidebar-primary-foreground: oklch(0.985 0 0);
+  --sidebar-accent: oklch(0.269 0 0);
+  --sidebar-accent-foreground: oklch(0.985 0 0);
+  --sidebar-border: oklch(0.269 0 0);
+  --sidebar-ring: oklch(0.439 0 0);
+}
+
+@theme inline {
+  --color-background: var(--background);
+  --color-foreground: var(--foreground);
+  --color-card: var(--card);
+  --color-card-foreground: var(--card-foreground);
+  --color-popover: var(--popover);
+  --color-popover-foreground: var(--popover-foreground);
+  --color-primary: var(--primary);
+  --color-primary-foreground: var(--primary-foreground);
+  --color-secondary: var(--secondary);
+  --color-secondary-foreground: var(--secondary-foreground);
+  --color-muted: var(--muted);
+  --color-muted-foreground: var(--muted-foreground);
+  --color-accent: var(--accent);
+  --color-accent-foreground: var(--accent-foreground);
+  --color-destructive: var(--destructive);
+  --color-destructive-foreground: var(--destructive-foreground);
+  --color-border: var(--border);
+  --color-input: var(--input);
+  --color-ring: var(--ring);
+  --color-chart-1: var(--chart-1);
+  --color-chart-2: var(--chart-2);
+  --color-chart-3: var(--chart-3);
+  --color-chart-4: var(--chart-4);
+  --color-chart-5: var(--chart-5);
+  --radius-sm: calc(var(--radius) - 4px);
+  --radius-md: calc(var(--radius) - 2px);
+  --radius-lg: var(--radius);
+  --radius-xl: calc(var(--radius) + 4px);
+  --color-sidebar: var(--sidebar);
+  --color-sidebar-foreground: var(--sidebar-foreground);
+  --color-sidebar-primary: var(--sidebar-primary);
+  --color-sidebar-primary-foreground: var(--sidebar-primary-foreground);
+  --color-sidebar-accent: var(--sidebar-accent);
+  --color-sidebar-accent-foreground: var(--sidebar-accent-foreground);
+  --color-sidebar-border: var(--sidebar-border);
+  --color-sidebar-ring: var(--sidebar-ring);
+}
+
+@layer base {
+  * {
+    @apply border-border outline-ring/50;
+  }
+  body {
+    @apply bg-background text-foreground;
+  }
+}

agent/uis/open-code/proposed-change/index.tsx

@@ -0,0 +1,46 @@
+import { Button } from "@/components/ui/button";
+import "./index.css";
+import ReactMarkdown from "react-markdown";
+import { Prism as SyntaxHighlighter } from "react-syntax-highlighter";
+import { coldarkDark } from "react-syntax-highlighter/dist/cjs/styles/prism";
+
+interface ProposedChangeProps {
+  toolCallId: string;
+  change: string;
+  planItem: string;
+}
+
+export default function ProposedChange(props: ProposedChangeProps) {
+  const handleReject = () => {};
+  const handleAccept = () => {};
+
+  return (
+    <div className="flex flex-col gap-4 w-full max-w-xl p-4 border-[1px] rounded-xl border-slate-200">
+      <p className="text-lg font-medium">Proposed Change</p>
+      <ReactMarkdown
+        children={props.change}
+        components={{
+          code(props) {
+            const { children, className, node: _node } = props;
+            const match = /language-(\w+)/.exec(className || "");
+            return match ? (
+              <SyntaxHighlighter
+                children={String(children).replace(/\n$/, "")}
+                language={match[1]}
+                style={coldarkDark}
+              />
+            ) : (
+              <code className={className}>{children}</code>
+            );
+          },
+        }}
+      />
+      <div className="flex gap-2 items-center w-full">
+        <Button variant="destructive" onClick={handleReject}>
+          Reject
+        </Button>
+        <Button onClick={handleAccept}>Accept</Button>
+      </div>
+    </div>
+  );
+}