The sidebar
The sidebar lists every open session, grouped so that whatever needs you is near the top.

| Group | Holds |
|---|---|
| Pinned | Sessions you pinned with m, in the order you pinned them. '1 to '9 jump to them. |
| Needs you | Blocked or asking: an agent waiting on you. |
| Working | Agents busy on their task. |
| Parked | Sessions you set aside with zz, and finished ones. |
Each row shows the session's state glyph, its title, its repos (one chip per worktree, then one per repo it opened a
PR in), the agent and what it is doing, and how many pull requests it tracks. The numbers on the left are relative to
the cursor, as in vim: the number on a row is how many j or k presses away it is.
The footer counts repos and worktrees; gr opens Repos.
zs collapses the sidebar to a narrow rail: one row per session with its number, state and pin, so moving and jumping
still work. zs again brings the sidebar back.
