Preview

The one line that stands for a longer body.

A session is mostly activity, and a column of bare tool names answers nothing. The preview is what turns Bash into Bash — command: ls: the first line that carries anything, tidied of the indentation that file and command output arrive with, and cut where it would stop being one line.

A body arrives as the characters it is; a tool call arrives as its fields. Both end as one line, so the column of rows reads the same way down the page.