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A11

typed streams and reusable actions for agentic apps

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Build agents, model services, and multimodal APIs with typed streaming actions that move cleanly between local, browser, GPU, and remote execution.

A11 — Streaming runtime for agents and multimodal APIs A11 Docs GitHub Studio Support Menu Build AI-native applications with familiar code. A11 is an open-source toolkit that turns ordinary async functions into actions: reusable capabilities with named inputs and outputs that can stream. Run the same action locally, across services or browsers, or let an AI model call it as a tool. Ready for model tools. The action definition already provides the tool interface. Stream more than text. Send structured data, progress, audio, images, and other results independently. Run work where it belongs. Mov

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