TLDR Tech / AI
Fable 5 vs. GPT-5.6 Sol on an NP-Hard Problem: Does /goal Help?
Claude Code and Codex both have a /goal option, but their implementations are fundamentally different. Claude Code implements /goal as a session-scoped Stop hook, so it can catch an early exit, but it doesn't know whether another ten million solver iterations are worthwhile. Codex treats a goal as a persisted thread state. It sees the files and tools, but effectively grades its own work. Using /goal can be a bad default as it can amplify bad decisions as much as good ones.
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