diff --git a/.env.example b/.env.example
index 8aa4f75..eba9cf7 100644
--- a/.env.example
+++ b/.env.example
@@ -65,7 +65,7 @@ SYSTEM_MESSAGES_PATH=config/system-messages.json
 REPO_DISCORD_IDENTITIES_PATH=.voidbot/private/repo-discord-identities.json
 REPO_FACE_RUMINATION_PASSES=3
 REPO_FACE_BIRTH_MODE=plan
-REPO_FACE_BIRTH_EXECUTOR=codex-exec
+REPO_FACE_BIRTH_EXECUTOR=model-runtime
 REPO_FACE_GITHUB_ACTIONS_ENABLED=false
 REPO_FACE_HEARTBEATS_ENABLED=false
 REPO_FACE_HEARTBEAT_STATE_PATH=.voidbot/status/repo-face-heartbeats.json