diff --git a/entrypoint.sh b/entrypoint.sh
index cc5e074..42ab7c0 100644
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-set -euo pipefail
+set -eo pipefail
 
 if [[ -z "${OAUTH:-}" ]]; then
   echo "OAUTH is required: provide base64 encoded Codex auth.json." >&2
@@ -13,6 +13,7 @@ if [[ -z "${MODEL:-}" ]]; then
 fi
 
 CODEX_HOME="${CODEX_HOME:-/root/.codex}"
+PROMPT="${PROMPT:-請自我介紹}"
 mkdir -p "$CODEX_HOME"
 printf '%s' "$OAUTH" | base64 -d > "$CODEX_HOME/auth.json"
 chmod 600 "$CODEX_HOME/auth.json"