diff --git a/plugins/warp/scripts/on-session-start.sh b/plugins/warp/scripts/on-session-start.sh
index 4d5e7fb..6b23f87 100755
--- a/plugins/warp/scripts/on-session-start.sh
+++ b/plugins/warp/scripts/on-session-start.sh
@@ -1,6 +1,13 @@
 #!/bin/bash
 # Hook script for Claude Code SessionStart event
 # Shows welcome message and Warp detection status
+#
+# Set CLAUDE_CODE_WARP_QUIET_SESSION_START=1 to suppress this message.
+# Useful when running in non-Warp terminals that support OSC 777
+# notifications (e.g. Ghostty), where the plugin works but the
+# "not running in Warp" message is misleading.
+
+[ "$CLAUDE_CODE_WARP_QUIET_SESSION_START" = "1" ] && exit 0
 
 # Check if running in Warp terminal
 if [ "$TERM_PROGRAM" = "WarpTerminal" ]; then