I regret letting Codex ever run with a /goal prompt or launch sub-agents. It doesn't matter what model it is at this point. The Sol and Astra lineage are completely RL fried. It doesn't matter how tight the prompt is or the agent instructions are. I've even had prompts and instructions externally reviewed and rewritten, but it doesn't change the behavior. The model always goes off track, ignores scope, and finds a way to digress into scaffolding, certification machinery, evidence gathering or audits. Even with the literal words barring it from doing so are right there in the prompt, plan, or instruction file. And it always ends in an absolute mess of junk files, slop code, and an account drained of limits. Codex can only be used effectively through the tightest of handholding. Keep one-shotting whatever you want if it's working for you. But real work on an existing system is excruciating and nearly impossible. They are shipping models they know don't follow directions and are nearly useless for real long-horizon work.