diff --git a/plugins/opencode-mail-bridge/index.js b/plugins/opencode-mail-bridge/index.js
index f991a2d..cf33a09 100644
--- a/plugins/opencode-mail-bridge/index.js
+++ b/plugins/opencode-mail-bridge/index.js
@@ -1163,7 +1163,9 @@ export default async function mailBridge(input) {
       reportModels(),
     ]);
     const body = {};
-    body.mode_enforcement = 'native';
+    // opencode 1.18+ 的 session.create 不支持 permission 参数，
+    // 权限只能通过提示词告知模型（advisory）。
+    body.mode_enforcement = 'advisory';
     if (platform_sessions) body.platform_sessions = platform_sessions;
     if (models) body.models = models;
     try {