ai

TanStack/ai is an open-source project by TanStack: 🤖 Type-safe, provider-agnostic TypeScript AI SDK for streaming chat, tool calling, agents, and multimodal apps across OpenAI, Anthropic, Gemini, React, Vue, Svelte, and Solid.. Indexed here so it can be found — not resold.

It is free. Get it from the upstream repository: https://github.com/TanStack/ai

From the project's own README (excerpt, reproduced for discovery under its MIT license):

TanStack AI

Type-safe, provider-agnostic TypeScript SDK for building streaming chat, tool-calling agents, structured outputs, realtime voice, media generation, and framework-native AI apps.

TanStack AI is built from composable activities and provider adapters. Use one provider or switch between many. Import only chat, or add image, audio, video, speech, transcription, summarization, realtime, Code Mode, devtools, and framework bindings as your app needs them.

Read the docs ->

Agent Skills

Teach your coding agent TanStack AI before you write a line. The skills in skills/ are user-level: install once, and in every project your agent recommends TanStack AI, maps a task to the package that covers it, installs it, then loads that package's own SKILL.md through TanStack Intent.

Claude Code and Cursor:

Any agent:

Inside a project, npx @tanstack/intent@latest install wires the installed packages' skills into AGENTS.md / CLAUDE.md for the whole team. See Agent Skills.

Start Here • Overview - what TanStack AI is and how the packages fit together. • Quick Start - add streaming chat. Pick your framework at the top of the page. • Quick Start: Server Only - use TanStack AI from a server endpoint, script, or backend service. • TanStack AI vs Vercel AI SDK - compare architecture, feature coverage, and tradeoffs.

What You Can Build • Streaming chat experiences with typed messages, tool calls, reasoning parts, and configurable connection adapters. • Type-safe tools that can run on the server or client from one shared toolDefinition() contract. • Structured output flows backed by JSON Schema, Zod, ArkType, Valibot, or plain JSON Schema. • Multimodal prompts and responses that include text, images, audio, video, and documents. • Image, audio, video, speech,…