Anthropic rethinks context engineering for Claude 5: simplifying instructions improves results
Anthropic has revamped its approach to context engineering for Claude 5, removing over 80% of the Claude Code system prompt for Opus 5 and Fable 5 without measurable degradation in programming tests. The new philosophy shifts from rigid rules to trusting the model's judgment, from examples to well-designed interfaces, and from monolithic context to progressive disclosure. Key practices include using automatic memory, simple tool descriptions, and rich references like code and evaluation rubrics rather than verbose instructions.
Anthropic
