Know when a session
last needed attention.

The time beside a pane records an interaction: a message sent, or an agent finishing a turn or asking for input. For Claude and Codex, dated conversation messages and messages sent through Acheron determine this time. File maintenance, ordinary terminal output, and redraws do not continually reset it.

Times persist with the workspace and appear in the phone’s session list. They help distinguish a session you just answered from one you haven’t returned to.