{"slug": "ask-hn-how-to-rewrite-claude-md-and-install-the-skill-for-opus5-and-fable5", "title": "Ask HN: How to rewrite `Claude.md` and install the skill for Opus5 and Fable5", "summary": "Anthropic has released the new Opus 5 and Fable 5 models, rendering existing resources like `claude.md` files and custom skills incompatible. Users are seeking guidance on how to rewrite or adjust these resources for the new models.", "body_md": "| |||||||||||||||||\n1 point by |\nAnthropic has released the new Opus 5 and Fable 5 models. Many existing resources—such as `claude.md` files and custom skills—are no longer compatible with these new models. How should one rewrite or adjust `claude.md`, or develop skills better suited to these models?\n| ||||||||||||||||\nApplications are open till July 27. |", "url": "https://wpnews.pro/news/ask-hn-how-to-rewrite-claude-md-and-install-the-skill-for-opus5-and-fable5", "canonical_source": "https://news.ycombinator.com/item?id=49080135", "published_at": "2026-07-28 06:29:39+00:00", "updated_at": "2026-07-28 06:52:31.238834+00:00", "lang": "en", "topics": ["artificial-intelligence", "large-language-models", "ai-products"], "entities": ["Anthropic", "Opus 5", "Fable 5"], "alternates": {"html": "https://wpnews.pro/news/ask-hn-how-to-rewrite-claude-md-and-install-the-skill-for-opus5-and-fable5", "markdown": "https://wpnews.pro/news/ask-hn-how-to-rewrite-claude-md-and-install-the-skill-for-opus5-and-fable5.md", "text": "https://wpnews.pro/news/ask-hn-how-to-rewrite-claude-md-and-install-the-skill-for-opus5-and-fable5.txt", "jsonld": "https://wpnews.pro/news/ask-hn-how-to-rewrite-claude-md-and-install-the-skill-for-opus5-and-fable5.jsonld"}}