Astro's Fred Schott Ships Flue 2: React Hooks for Agents, 16 Built-In Hooks, and the Claim That 'There Is No Agent Without a Harness'

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Latent Space published an August 15, 2026 interview with Fred Schott — creator of Astro, acquired by Cloudflare in January 2026 — on Flue 2, the first stable release of his agent framework. Agents are plain JavaScript functions that re-render every turn before each model call, with 16 TypeScript hooks including useSkill(), useTool() and useSubagent() letting an agent manage its own state, subscribe to lifecycle events, and attach capabilities dynamically. Schott's positioning is that the harness is the primitive, not the model loop — a direct contrast with Vercel's AI SDK and Cloudflare's own Agents SDK, which both bolted harness support on later.