The task will outlive its first context window, so decide now what Astra will be able to search for later. Astra Medium in Codex for the setup; raise it when the work gets hard. The feature is called experimental context management: opt in with features.context_management.experimental_mode = true in config.toml, start a new task, ChatGPT Plus, Pro or Pro Lite sign-in only, Codex CLI 0.153.0 or newer. It is in-task continuity, not cross-session memory, and Astra is instructed never to show its notes, so do not ask. Free template — copy and paste into ChatGPT, Claude, or Copilot.