Intel / article

React for Agents: Astro Creator Brings Hooks to his Meta-Harness, Flue

Source: Richard MacManus
Author: Richard MacManus
Date: Published Aug 15, 2026

Terms in this piece · Glossary

AI agent — An AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.
agent harness — The scaffolding around a model that turns it into a working agent — the loop, the tools it can call, and the rules for when to stop.

Why it matters

Hooks are a concrete answer to how agent state and capabilities get composed at runtime, from the person who built Astro. Engineers picking a now have a second serious design to compare against Vercel's eve.

Key quotes

“Schott is the creator of the web framework Astro, which led to his company being acquired by Cloudflare in January.”
Richard MacManus

“There are 16 built-in hooks in Flue 2, including useSkill(), useTool(), useSubagent(). You can also add custom hooks.”
Richard MacManus

“What hooks open up for developers is that they make an agent much more dynamic, by allowing its configuration to change as a conversation or workflow progresses.”
Richard MacManus

“The Flue project began earlier this year within the Astro repository, as an issue-triage system. At first, it was an LLM-driven script or workflow reviewing issues.”
Richard MacManus

“Building on Pi meant committing to having a built-in agent harness.”
Richard MacManus

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