The new rules of context engineering for Claude 5 generation models
Anthropic (351 HN points): The new rules of context engineering for the Claude 5 generation — direct guidance for Opus 5.
Why it matters
- First official Anthropic context-engineering playbook for the Claude 5 generation.
- Direct extension of Opus 5's token-efficiency framing from yesterday.
- Materially affects how enterprises write coding-agent prompts and RAG pipelines for Claude.
- Sets the practitioner reference against the Claude Code 33k-overhead teardown and Codex context walkback.