Perplexity on November 2, 2026, published a technical guide to persistent AI agent memory, detailing the Brain system in Perplexity Computer, the Agent API’s memory-building components, and tests for whether stored context improves an agent’s later work. Brain’s Architecture and Reported Results Brain is Perplexity’s self-improving memory system for Computer, built to organize past work and corrections into an evolving knowledge wiki. It uses token-level memory, meaning information is stored…