A coding agent rewrites its own codebase every day

Factory AI’s Signals system analyzes the agent’s own interactions and turns what it finds into daily updates to the agent’s codebase, so the product that writes code is now partly written from its own usage (announcement). The same item records Anthropic’s MCP Apps, which lets tools render interactive interfaces inside the chat (MCP blog), filed by the newsletter under one heading: the recursive loop closing. It follows Claude Code’s Tasks two days earlier and the self-written Cowork app as scaffolding steps in the recursive self-improvement trajectory, and it precedes the emergent version four days later, when a Moltbook agent hardened its own loop after an SSH attack with no vendor involved.