Add OSC 777 support and clean up the notification title

Support OSC 777 ; notify ; title ; body (the rxvt/urxvt notification form) so a program can set an explicit title and body, with the semicolon-safe body rejoined via slice(2).join(";"). Clean the OSC 9 title: prefer a user-set custom tab name, and reduce filesystem-path titles to their last segment so shell tabs no longer show a long, truncated cwd.

1 files changed, 12 insertions, 0 deletions

diff --git a/README.md b/README.md
index c6805a4..7ba1514 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,18 @@ Clicking the notification brings Tabby to the front and switches to the exact
 tab/pane that emitted the sequence. The notification title reflects the tab's
 current title at the time the sequence is received.
 
+The OSC 9 title is cleaned up: it prefers a user-set custom tab name, and when
+the title looks like a filesystem path (e.g. a shell tab showing its cwd) only
+the last path segment is used instead of the full, often-truncated path.
+
+`OSC 777 ; notify ; title ; body` (the rxvt/urxvt notification form) is also
+supported, letting a program set an explicit title and body:
+
+```sh
+# creates a notification titled 'Build' with body 'Done'
+printf "\033]777;notify;Build;Done\a"
+```
+
 ### Example commands
 
 ```sh