with open("src/app_controller.py", "r", encoding="utf-8", newline="") as f:
    content = f.read()

# Add debug to _cb_plan_epic
old = """def _cb_plan_epic(self) -> None:
  def _bg_task() -> None:
   sys.stderr.write("[DEBUG] _cb_plan_epic _bg_task started\\n")
   sys.stderr.flush()
   try:
    self._set_status("Planning Epic (Tier 1)...")
    history = orchestrator_pm.get_track_history_summary()"""

new = """def _cb_plan_epic(self) -> None:
  def _bg_task() -> None:
   sys.stderr.write("[DEBUG] _cb_plan_epic _bg_task started\\n")
   sys.stderr.flush()
   try:
    self._set_status("Planning Epic (Tier 1)...")
    # DEBUG: Check provider
    import src.ai_client as ai_client
    sys.stderr.write(f"[DEBUG] _cb_plan_epic: ai_client._provider={ai_client._provider}, _model={ai_client._model}\\n")
    sys.stderr.flush()
    history = orchestrator_pm.get_track_history_summary()"""

content = content.replace(old, new)

with open("src/app_controller.py", "w", encoding="utf-8", newline="") as f:
    f.write(content)

print("Added debug to _cb_plan_epic")