Anthropic revises its Prompt engineering best practices guide
Revised the Prompt engineering best practices document — updated to move away from a focus on assigning roles and to put clear instructions and explanations of purpose first
Why it matters
A record of a lab changing its official recommendations. The role-prompting practice of 2023 has officially receded
Source — Primary sources first; secondary reports are labelled “Press”
Officialclaude.comhttps://claude.com/blog/best-practices-for-prompt-engineeringAdded in Week 35, 2026 · See that week