Intel / article

datasette-agent 0.4a0

Source: simonwillison.net
Author: Simon Willison
Date: Published Jul 31, 2026

Context

Datasette 0.4a0 gives plugins a way to send work into the user's browser and return the result to the agent. Simon Willison's release announcement introduces .browser_task(), which lets an agent tool request browser-side JavaScript execution. The implementation record describes suspending the agent's turn while that work is pending, then resuming with its result.

A concrete use appears in the subsequent Datasette Apps release: an agent can test an invisible copy of an app and measure page elements. The release notes explain how this supplies a debugging loop, giving the agent browser observations it can use when editing an app.

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.
context window — The maximum amount of text a model can consider at once — its working memory for the current conversation or task.

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