Changes in the system prompt between Claude Opus 4.6 and 4.7
Summary
Simon Willison analyzes Claude Opus 4.7 system-prompt changes from 4.6, highlighting rebranding to 'Claude Platform', new tools like Claude in Chrome, Excel, and Powerpoint, expanded safety rules, improved ambiguity resolution with tool use, and a shift toward concise responses. The piece also notes missing tool descriptions, links to the diffs, and a list of tools.