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ai-sdk-demo

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ai-sdk-demo

A persistent, streaming chat app built on @upstash/agentkit-ai-sdk and the Vercel AI SDK (useChat), backed entirely by a real Upstash Redis.

What it shows

  • Chat history — every turn is persisted with createChatHistory. The sidebar lists your chats and fuzzy-searches them (listChats / searchChats); reloading or revisiting a chat resumes it (getChat → useChat({ messages })). The route persists the whole conversation in onFinish.
  • Agent memory — recall_memory / save_memory tools (createMemoryTools).
  • Search tools — schema-driven search / aggregate / count over a seeded books index (createSearchTools). The books are seeded once into Redis on first load.
  • Tool cache — a memoized convert_price tool (cachedTools).
  • Rate limiting — createRateLimit checked (by user) before each model call.

Tool calls are rendered inline in the chat so you can see what the agent did.

Setup

cp .env.example .env   # then fill in the values (or put them in the repo-root .env)
pnpm install           # from the repo root

.env.example lists the required vars: UPSTASH_REDIS_REST_URL, UPSTASH_REDIS_REST_TOKEN, and OPENAI_API_KEY. The app reads a local .env first, then falls back to the repo-root .env.

Run

pnpm --filter ai-sdk-demo dev   # or: cd examples/ai-sdk-demo && pnpm dev

Open http://localhost:3000. The demo uses the gpt-5.4-mini model.