Human-reviewed semantic diff
Product context and knowledge boundary expanded
Anthropic's highlighted January changes add named product surfaces and sharpen the instruction not to infer unlisted product details that may have changed.
prompt change Read practical interpretation
Compared versions
Change summary
What meaningfully changed?
Human-reviewed normalized semantic lines; these are not raw upstream line counts.
- Added
- Added2
- Removed
- Removed2
- Changed
- Changed2
Unified semantic diff
Affected instruction sections
Line markers, text labels, and color communicate state together. These normalized lines summarize meaning; they are not an upstream raw-file diff.
Product information boundary
- context
Claude Opus 4.5 identity and core chat/API/Claude Code access context remain. - removed
The normalized product list stops at chat, developer platform, and Claude Code. - added
The normalized product list also covers browser, spreadsheet, and desktop task surfaces.
Knowledge and support routing
- context
Unsupported product and API questions continue to route toward official resources. - removed
The normalized boundary is expressed mainly through support routing. - added
The normalized boundary explicitly treats unlisted product details as potentially changed.
Provenance
Both versions come from the same official publication.
Human-reviewed comparison of the official dated entries and Anthropic's highlighted changes; rendered as inert limited excerpts and editorial normalization.
Open primary source