diff --git a/.env.example b/.env.example
index 2fab177..8133681 100644
--- a/.env.example
+++ b/.env.example
@@ -37,6 +37,7 @@ FEATURE_SHADE=
 FEATURE_TRIVIA=true  # set to "false" to disable trivia
 FEATURE_ESTEEMED=    # set to anything to enable satirical esteemed member posts
 ESTEEMED_ROOM=       # room ID for esteemed member posts (separate from broadcast rooms)
+ARENA_BOSS_FLOW=     # Adv 2.0 L2: set to "1" to route arena rounds through the zone-boss flow (staged combat log + TwinBee mood lines). Empty / "0" / "false" keeps legacy CombatPower path. Removed when L4f lands.
 
 # ---- Games & Economy ----
 GAMES_ROOM=                    # room ID where game commands work (trivia, hangman, blackjack, holdem, wordle, flip)