Tab strip sizing

Roost's tab strip is a horizontally-scrolling row of pills, one per tab in the active project. By default each pill is bounded between a minimum and maximum width so the strip behaves like Ghostty's: pills shrink proportionally as you open more tabs, then start scrolling horizontally once they hit the minimum.

Config keys

Set these in ~/.config/roost/config.conf (more precisely $XDG_CONFIG_HOME/roost/config.conf on both platforms). They take effect on next launch.

Key	Default	Notes
tab-min-width	80	Pill width floor in points. As more tabs open, pills shrink toward this minimum. Set to 0 to disable the floor — pills can shrink to whatever their label needs.
tab-max-width	220	Pill width cap in points. The active pill in edit mode (during Cmd-R rename) is unaffected — it always gets at least 220pt so the rename field is usable. Set to 0 to disable the cap entirely (pills grow to fit their full title; this is the pre-round-4 behavior).

Examples

# Default: pills shrink between 80pt and 220pt, then scroll.
# (No config lines needed — these are the built-in defaults.)

# Wider pills before they start shrinking:
tab-max-width = 280

# Don't shrink at all; cap pills at 200pt and scroll past that.
tab-min-width = 200
tab-max-width = 200

# Disable the cap entirely — pills grow to their full title.
# Useful if you set short, deliberate titles via `roostctl set-title`.
tab-max-width = 0

Platform notes

• macOS uses these config keys directly to constrain the TabPillView widthAnchor on each pill.
• Linux ignores these keys — libadwaita's Adw.TabBar widget handles tab width distribution and scrolling internally with its own (similar) bounded-width algorithm. The Linux behavior already matches the Mac default, so the keys are macOS-only for now.