xAI on September 16, 2026 announced cross-session memory for Grok Build, its terminal coding agent, a feature that records conventions, decisions, and project facts as markdown notes in the background and reads them back in later sessions. Memory is available in Grok Build now and applies to new sessions. xAI says the agent keeps notes on the conventions, decisions, and project facts that come up while a user works, and that later sessions read those notes before touching related code. The…