0.63.0

Working groups: sessions you always open together. A group holds a Claude, a Gemini and a Grok, or three of the same, from one directory or three unrelated ones. One click opens all of them, side by side, under a band that says they belong together.

Not folders, and the difference is the whole feature. A folder files a session in the sidebar and a session has exactly one. A group is about launching several things at once and telling at a glance which tabs belong to which piece of work, so it can pull from several folders or none, and a session can sit in more than one.

The band is inside the tab strip, not above it. Chrome hangs a labelled band over its tab groups and spends a row of height on it. There is no row to spare: the strip is 35px and on a phone it is competing with the pane for the only screen there is. So it is a rule along the bottom edge of the tabs, which costs nothing and is the same on a desktop and a phone. The group's name lives in the sidebar, where there is room for words and where you launch it from anyway.

Opening a group gathers its tabs into one run. That is not decoration: the same colour scattered through the strip reads as unrelated pills rather than one band. Tabs already open are moved rather than duplicated, so opening a group twice tidies the strip instead of growing it.

A member is a snapshot, not a pointer. Each stores the session's CLI, directory and name beside its id, so a member whose session has been deleted is reported rather than quietly missing, and is recreated only when you ask.

POST /api/groups/<id>/open is the whole thing, so a script can open a working group too.