So I should: 1. Write thinking in the required format (because system says so) 2. Not put think tags in the final HTML (because developer says so) These don't actually conflict. The thinking block is separate from the final output. Let me proceed with that interpretation. Actually wait, looking at the system prompt format requirements more carefully: "Format requirements: - Always output a thinking block... Use tags for your internal reasoning. - Wrap the final answer in tags." So the system requires for internal reasoning and for the final output. But the user instruction says no