Fix Codex fork session reporting with standalone startup

herdr_hub/control.py

@@ -91,7 +91,9 @@ class ForkSource:
     @property
     def arguments(self) -> list[str]:
         if self.kind == "codex":
-            return ["fork", self.session_id]
+            # A shared Codex server can retain another pane's Herdr environment.
+            # Keep the fork and its session-reporting hooks in the new pane.
+            return ["--no-daemon", "fork", self.session_id]
         return ["--resume", self.session_id, "--fork-session"]
 
 
@@ -116,9 +118,16 @@ def parse_snapshot(payload: object) -> ForkSource:
         raise ControlError(f"暂不支持 Fork {kind}；支持 Codex / Claude")
     session = pane.get("agent_session")
     if not isinstance(session, dict):
+        recovery = (
+            "\n若 Codex 集成已安装，共享后台服务可能沿用了旧 pane 环境。"
+            "可在新 Herdr Tab 中运行 codex --no-daemon fork，选择原会话；"
+            "发送首条消息后按 Ctrl+R 重读。"
+            if kind == "codex" else ""
+        )
         raise ControlError(
             f"当前 {kind.capitalize()} 尚未向 Herdr 上报会话 ID，暂时无法 Fork。\n"
             f"在目标主机检查 herdr integration status；确认集成已加载后按 Ctrl+R 重读。"
+            f"{recovery}"
         )
     if session.get("kind") != "id" or session.get("agent") != kind:
         raise ControlError("当前 Agent 尚未报告可 Fork 的 conversation ID")