companion: a remark for the program in front of her

The focused window's class, from Hyprland's activewindow event, picks a
line from Lines.js keyed app:<class>. The event fires on every title
change too, so she reacts only when the class changes, and a third of
the time, under the existing 30 s line cooldown so alt-tabbing does not
make her chatter. Classes come from the window rules in the live config;
one without lines says nothing. Lines only, no frames of her own yet.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/desktop/companion/README.md b/desktop/companion/README.md
index 4582b64..adbcb01 100644
--- a/desktop/companion/README.md
+++ b/desktop/companion/README.md
@@ -51,6 +51,11 @@ frame falls back to its outfit's `base`.
   stacks a later surface above an earlier one on a layer, and 0.56.2 has
   no layer rule to order them (no `order` key in the binary; an unknown
   key raises no config error).
+- The program in front of her is Hyprland's `activewindow` event,
+  `class,title`. It also fires on every title change, so she reacts
+  only when the class changes, a third of the time, under the 30 s line
+  cooldown. Lines are `app:<class>` in `Lines.js`, class lowercased; a
+  class with none says nothing.
 - She only feels the pointer while it is over her: Quickshell has no
   global pointer and Hyprland sends no motion events. Hence the 0.6 s
   dodge rather than moving away as the pointer approaches.