diff --git a/README.md b/README.md
index 501e36a..4f5c468 100644
--- a/README.md
+++ b/README.md
@@ -140,6 +140,8 @@ OPENAI_API_KEY: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
 OPENAI_MODEL: glm-4.7
 
 # Root directory for all project sessions (absolute path)
+# Only used in standalone mode (python standalone.py)
+# In router mode (python main.py), this field is ignored
 WORKING_DIR: C:/Users/yourname/projects
 
 # Allowlist of Feishu open_ids that may use the bot.