datasette-apps 0.2a0 Lets Agents Debug and Edit Running Apps Through Invisible Iframes
Simon Willison·low signal
Simon Willison released datasette-apps 0.2a0 on August 1, adding a mechanism for AI agents to debug and edit live apps by driving them through invisible iframes and executing JavaScript in the page. This is a different shape from the browser-automation MCP servers currently dominating this space — the agent gets in-page JS execution against the running app rather than a screenshot-and-click loop. The technique is worth borrowing for anyone whose agent needs to verify frontend behavior without paying the token cost of screenshot round-trips.