Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
ElsewhereArea: what it touches
Internal ChangesKind: in v2.1.280,
Internal ChangesSection of the release
What
Several new compressed reference documents were added to Claude Code's bundled docs and skill assets, including:
a new SKILL file
a doc on live sources
a doc on platform availability
a doc on prompt auditing
a doc on prompt caching
a doc on tool-use concepts
Why
These are reference materials Claude Code can draw on, giving it built-in documentation to consult on these topics rather than relying only on external sources.
