Anthropic says Claude Code can drop 80% of its system prompt in Claude 5
AI寒武纪 · wechat · 2026-07-25
Anthropic says Claude Code’s context-engineering playbook has changed dramatically for the Claude 5 generation.
- The company says it removed more than 80% of the old system prompt without measurable coding-quality loss.
- The new guidance emphasizes letting the model infer intent, designing tools and interfaces well, using progressive disclosure, and relying less on hand-written repetition.
- Memory is now handled automatically, while Skills, CLAUDE.md, artifacts, rubric files, and code-based references are treated as layered context sources.
- Anthropic also introduced claudedoctor, a command meant to help users slim down Skills and CLAUDE.md files and adopt the new workflow.
The post frames these changes as a broader shift from rigid instructions to richer, more adaptive context design for agentic coding.
Related event: Anthropic Slashes Claude Code System Prompts by Over 80%(11 posts)→
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