P14:[{"_319":88,"_320":85,"_321":322},"app1","app2","diffPatch","diff --git a/app/components/product-chat.tsx b/app/components/product-chat.tsx\nindex 5d4d5d4..a72ba34 100644\n--- a/app/components/product-chat.tsx\n+++ b/app/components/product-chat.tsx\n@@ -2,8 +2,9 @@ import { useChat, fetchServerSentEvents } from '@tanstack/ai-react'\n import { TextPart } from '@tanstack/ai-react/ui'\n import { MessageCircle, Send, X } from 'lucide-react'\n import { useState } from 'react'\n-import { useRouteLoaderData } from 'react-router'\n+import { useNavigate, useRouteLoaderData } from 'react-router'\n import { ProductCard } from '#app/components/product-card'\n+import { navigateToDef } from '#app/tools/navigation.ts'\n \n export type ProductChatContext = {\n \tproductId: string\n@@ -43,12 +44,42 @@ function useCurrentProduct(): ProductChatContext | undefined {\n \n export function ProductChat() {\n \tconst product = useCurrentProduct()\n+\tconst navigate = useNavigate()\n \tconst [isOpen, setIsOpen] = useState(false)\n \tconst [draft, setDraft] = useState('')\n \n+\t/**\n+\t * 🦉 Why we build the client tool *here* (inside the component)\n+\t *\n+\t * Client tools run in the browser, but they're just functions — they\n+\t * can't use React hooks directly. The trick is to grab the hook value\n+\t * (here, `navigate` from `useNavigate()`) at render time and let the\n+\t * `.client(...)` callback close over it. That's how you bridge the\n+\t * \"I'm a plain function\" world of tools with the \"I'm a React hook\"\n+\t * world of routing.\n+\t *\n+\t * 🐨 Build the client tool below as `const navigateTo`. Use\n+\t * `navigateToDef.client(execute)` to attach your callback, then write\n+\t * the callback that actually moves the customer to the page the model\n+\t * picked. Everything you need is already in scope: `navigate` from\n+\t * React Router, and `navigateToDef` (which defines what the input and\n+\t * output schemas look like — `navigation.ts` is the spec).\n+\t *\n+\t * 🦺 The callback's input type is inferred from `navigateToDef`'s\n+\t * `inputSchema`, and its return type must match the `outputSchema`.\n+\t * TypeScript will tell you if either is off.\n+\t *\n+\t * 🐨 Then add `tools: [navigateTo]` to the `useChat({...})` call. That's\n+\t * what hands your client tool to TanStack AI so it can run when the\n+\t * model picks it.\n+\t */\n+\tvoid navigateToDef\n+\tvoid navigate\n+\n \tconst { messages, sendMessage, isLoading } = useChat({\n \t\tconnection: fetchServerSentEvents('/api/chat'),\n \t\tforwardedProps: product ? { productId: product.productId } : {},\n+\t\t// 🐨 Add `tools: [navigateTo]` here once you've built the tool above.\n \t})\n \n \treturn (\n@@ -75,7 +106,7 @@ export function ProductChat() {\n \n \t\t\t\t\t

\n \t\t\t\t\t\t

\n-\t\t\t\t\t\t\t👋 Hi! Ask me anything about this product.\n+\t\t\t\t\t\t\t👋 Hi! Ask me about products, or tell me where you'd like to go.\n \t\t\t\t\t\t

\n \n \t\t\t\t\t\t{messages.map((m) => (\n@@ -107,12 +138,13 @@ export function ProductChat() {\n \t\t\t\t\t\t\t\t\t\t)\n \t\t\t\t\t\t\t\t\t}\n \t\t\t\t\t\t\t\t\tif (part.type === 'tool-call') {\n-\t\t\t\t\t\t\t\t\t\t// Server tools that return `{ products }` (searchProducts,\n-\t\t\t\t\t\t\t\t\t\t// findSimilarProducts, recommendProducts) show their result\n-\t\t\t\t\t\t\t\t\t\t// as a stack of ProductCards once execution finishes.\n \t\t\t\t\t\t\t\t\t\tconst output = (part as { output?: unknown }).output as\n-\t\t\t\t\t\t\t\t\t\t\t| { products?: Array<{ id: string }> }\n+\t\t\t\t\t\t\t\t\t\t\t| {\n+\t\t\t\t\t\t\t\t\t\t\t\t\tproducts?: Array<{ id: string }>\n+\t\t\t\t\t\t\t\t\t\t\t\t\tdestination?: string\n+\t\t\t\t\t\t\t\t\t\t\t }\n \t\t\t\t\t\t\t\t\t\t\t| undefined\n+\n \t\t\t\t\t\t\t\t\t\tconst products = output?.products\n \t\t\t\t\t\t\t\t\t\tif (Array.isArray(products) && products.length > 0) {\n \t\t\t\t\t\t\t\t\t\t\treturn (\n@@ -126,6 +158,18 @@ export function ProductChat() {\n \t\t\t\t\t\t\t\t\t\t\t\t

\n \t\t\t\t\t\t\t\t\t\t\t)\n \t\t\t\t\t\t\t\t\t\t}\n+\n+\t\t\t\t\t\t\t\t\t\tif (output?.destination) {\n+\t\t\t\t\t\t\t\t\t\t\treturn (\n+\t\t\t\t\t\t\t\t\t\t\t\t\n+\t\t\t\t\t\t\t\t\t\t\t\t\t📍 Took you to the {output.destination} page.\n+\t\t\t\t\t\t\t\t\t\t\t\t\n+\t\t\t\t\t\t\t\t\t\t\t)\n+\t\t\t\t\t\t\t\t\t\t}\n+\n \t\t\t\t\t\t\t\t\t\treturn (\n \t\t\t\t\t\t\t\t\t\t\t setDraft(e.target.value)}\n-\t\t\t\t\t\t\tplaceholder=\"Ask about this product...\"\n+\t\t\t\t\t\t\tplaceholder=\"Ask about products or where to go...\"\n \t\t\t\t\t\t\tdisabled={isLoading}\n \t\t\t\t\t\t\tclassName=\"flex-1 rounded-full border border-stone-200 bg-stone-50 px-4 py-2 text-sm text-gray-700 placeholder-gray-400 focus:border-amber-500 focus:ring-2 focus:ring-amber-500 focus:outline-none disabled:opacity-60 dark:border-gray-700 dark:bg-gray-800 dark:text-gray-200\"\n \t\t\t\t\t\t/>\ndiff --git a/app/routes/api.chat.tsx b/app/routes/api.chat.tsx\nindex 9de4082..008b696 100644\n--- a/app/routes/api.chat.tsx\n+++ b/app/routes/api.chat.tsx\n@@ -10,6 +10,7 @@ import {\n \tbuildProductPrompt,\n } from '#app/prompts/system.ts'\n import { PageForwardedProps } from '#app/schemas/chat.js'\n+import { navigateToDef } from '#app/tools/navigation.ts'\n import {\n \tfindSimilarProducts,\n \trecommendProducts,\n@@ -19,8 +20,19 @@ import { type Route } from './+types/api.chat'\n \n const adapter = openRouterText('nvidia/nemotron-3-super-120b-a12b:free')\n \n+// 🐨 The new client tool's *definition* is imported above. The server doesn't\n+// run `navigateTo` itself — it just needs to tell the model the tool\n+// exists. Add `navigateToDef` to the `tools: [...]` array on `chat({...})`\n+// below. (Note: it's a definition, not a `.server(...)` tool — that's the\n+// whole point of client tools. The model sees it the same way either way.)\n+//\n+// 🦉 A client tool pauses the run. The browser runs the tool, then sends a\n+// second request with the result. `runId`, `parentRunId`, and `resume`\n+// are already forwarded below, so `chat()` knows which run to continue.\n+void navigateToDef\n+\n export const action = async ({ request }: Route.ActionArgs) => {\n-\tconst { messages, forwardedProps, threadId } =\n+\tconst { messages, forwardedProps, threadId, runId, parentRunId, resume } =\n \t\tawait chatParamsFromRequest(request)\n \tconst props = PageForwardedProps.safeParse(forwardedProps)\n \tif (!props.success) {\n@@ -39,6 +51,9 @@ export const action = async ({ request }: Route.ActionArgs) => {\n \t\tsystemPrompts,\n \t\tmessages,\n \t\tthreadId,\n+\t\trunId,\n+\t\tparentRunId,\n+\t\tresume,\n \t\ttools: [searchProducts, findSimilarProducts, recommendProducts],\n \t\treasoning: 'medium',\n \t})\ndiff --git a/app/tools/navigation.ts b/app/tools/navigation.ts\nnew file mode 100644\nindex 0000000..9e3e60b\n--- /dev/null\n+++ b/app/tools/navigation.ts\n@@ -0,0 +1,67 @@\n+import { toolDefinition } from '@tanstack/ai'\n+import { z } from 'zod'\n+\n+/**\n+ * Single source of truth for which pages the bot is allowed to send the\n+ * customer to. The keys become the enum the model picks from, and the values\n+ * become the per-page descriptions the model reads to decide which page is\n+ * the right pick.\n+ *\n+ * 🦉 Why an explicit allowlist instead of \"all routes\"?\n+ * React Router doesn't ship a runtime hook that enumerates every defined\n+ * route — and we wouldn't want one here even if it did. `/api/chat` is a\n+ * route. `/products/$productId` is a route that needs an id the bot can't\n+ * guess. Future `/admin/...` routes would be routes. The set of pages the\n+ * bot is *allowed* to navigate to is a deliberately curated subset, not\n+ * the full router config. Adding a new public page = add one entry here.\n+ */\n+const NAVIGABLE_PAGES = {\n+\t'/': 'The home page (hero, featured products, categories).',\n+\t'/cart': \"The customer's shopping cart.\",\n+\t'/products':\n+\t\t'The full product catalog. Use this for general browse requests when no specific filter applies (for filtered search, use `searchProducts` instead).',\n+\t'/about': 'The \"about EpicStore\" page.',\n+\t'/contact': 'The contact form.',\n+} as const\n+\n+type Destination = keyof typeof NAVIGABLE_PAGES\n+\n+const destinationDoc = Object.entries(NAVIGABLE_PAGES)\n+\t.map(([path, desc]) => `- ${path} — ${desc}`)\n+\t.join('\\n')\n+\n+const NavigateToInput = z.object({\n+\tdestination: z\n+\t\t.enum(\n+\t\t\tObject.keys(NAVIGABLE_PAGES) as [Destination, ...Array],\n+\t\t)\n+\t\t.describe(`Which page to take the customer to. Pick one of:\\n${destinationDoc}`),\n+})\n+\n+const NavigateToOutput = z.object({\n+\tdestination: z.string(),\n+})\n+\n+/**\n+ * 🐨 Define and export `navigateToDef` here — same shape as the\n+ * `toolDefinition({...})` calls you wrote for the server tools last time.\n+ * The two schemas above (`NavigateToInput`, `NavigateToOutput`) are\n+ * pre-built for you to plug in.\n+ *\n+ * 💰 `name`: `'navigateTo'`\n+ *\n+ * 💰 `description`: copy this in exactly —\n+ *\n+ * 'Take the customer to a page in the EpicStore site. Use this when ' +\n+ * 'they ask to go somewhere — for example \"take me to the cart\", ' +\n+ * '\"show me all products\", \"go back home\", \"open the about page\".'\n+ *\n+ * 💰 `inputSchema`: plug in `NavigateToInput`.\n+ * 💰 `outputSchema`: plug in `NavigateToOutput`.\n+ *\n+ * 🦉 Don't call `.server(...)` or `.client(...)` on it here — this file\n+ * exports just the definition. The server (`api.chat.tsx`) will pass the\n+ * definition straight into `chat({ tools: [...] })` to advertise the tool\n+ * to the model. The browser (`product-chat.tsx`) will attach the actual\n+ * `.client(...)` callback. Same definition, two sides.\n+ */"]

app/components/product-chat.tsx-52+96App 1Copy app 2 file to app 1 (Option+Command to sync without opening)Copy app 1 file to app 2 (Option+Command to sync without opening)App 2

app/routes/api.chat.tsx-20+35App 1Copy app 2 file to app 1 (Option+Command to sync without opening)Copy app 1 file to app 2 (Option+Command to sync without opening)App 2

app/tools/navigation.ts-0+67App 1Copy app 2 file to app 1 (Option+Command to sync without opening)Copy app 1 file to app 2 (Option+Command to sync without opening)App 2

app/components/product-chat.tsx-52+96App 1Copy app 2 file to app 1 (Option+Command to sync without opening)Copy app 1 file to app 2 (Option+Command to sync without opening)App 2

app/routes/api.chat.tsx-20+35App 1Copy app 2 file to app 1 (Option+Command to sync without opening)Copy app 1 file to app 2 (Option+Command to sync without opening)App 2

app/tools/navigation.ts-0+67App 1Copy app 2 file to app 1 (Option+Command to sync without opening)Copy app 1 file to app 2 (Option+Command to sync without opening)App 2

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