Add Codex remote-control backend

agents.py

@@ -355,9 +355,29 @@ def start_agent(cfg, agent, *, force=False):
             parts.append(backend["flags"])
         parts.append(f"\"$(cat '{kf}')\"")
         cmd = " ".join(p for p in parts if p)
+        # Some interactive CLIs need an idempotent service prepared before their TUI starts.
+        # Codex Remote Control is one such service: `remote-control start` ensures the shared
+        # app-server daemon is enrolled and connected, then the pane runs the ordinary Codex TUI.
+        if backend.get("preamble"):
+            preamble = _render_template(backend["preamble"], {
+                "bin": backend["bin"], "session": session, "model": model,
+                "dir": shlex.quote(cwd),
+            })
+            cmd = f"{preamble} && {cmd}"
         log(f"starting {session} ({agent['backend']}, kind={agent['kind']}, phase={pid}, "
             f"model={model or 'default'}{', resume' if rid else ''})")
         new_session(session, cwd, cmd, log_path)
+        # An unattended TUI may present a deterministic first-run gate before it processes the
+        # prompt already supplied on argv (Codex asks whether to trust a new project directory).
+        # Backends opt in with both the screen regex and response; nothing is accepted implicitly.
+        startup_re = backend.get("startup_prompt_re")
+        if startup_re:
+            time.sleep(int(backend.get("startup_prompt_delay", 2)))
+            if re.search(startup_re, capture_pane(session, 40), re.I):
+                _run(["tmux", "send-keys", "-t", TP(session), "-l", "--",
+                      str(backend.get("startup_prompt_response", ""))])
+                _run(["tmux", "send-keys", "-t", TP(session),
+                      backend.get("submit_key", "Enter")])
 
 def start_service(cfg, svc):
     session = svc["session"]