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Anthropic’s Opus 5.5 Guide Flags Agent Migration Traps
Always-on thinking, cache-sensitive effort settings and ambiguous progress updates make this prompting guide a practical checklist for production agents.
Related reporting, guides, and analysis from Zeniteq.

Always-on thinking, cache-sensitive effort settings and ambiguous progress updates make this prompting guide a practical checklist for production agents.

Claude Opus 5 helped recover a long-unsolved plaintext, but a specialist’s tools and historical clues were central to the result.