Prompting Tips and Pitfalls for Claude Opus 5

Developers shared prompting tips for Claude Opus 5, advising strict task boundaries to prevent unwanted refactoring and text leakage. The guide also recommends simplifying prompts rather than adding instructions to ensure stable structured outputs.

2026-07-29 ~ 2026-07-29 · 4 related posts

• Claude Opus 5 needs hard boundaries: one fix, no extra refactors — heypearlai · 2026-07-29
• Claude Opus 5 may narrate mid-response fixes, breaking structured outputs — heypearlai · 2026-07-29
• Anthropic warns Opus 5 may leak fake tool calls when thinking is off — heypearlai · 2026-07-29
• Claude Opus 5 prompt advice: cut instructions instead of adding more — heypearlai · 2026-07-29