A migration with the human on the irreversible step. Reasoning: high; API reasoning.effort "high", Codex Astra Extra High. OpenAI's internal database-migration tasks are where Astra posted its widest lead: 63.9 percent against 42.7 for GPT-5.6 Sol. The two STOP lines are deliberate: Astra proceeds on sensible assumptions if you do not answer a non-blocking question, so the destructive step is written as a decision it waits for. Free template — copy and paste into ChatGPT, Claude, or Copilot.