What
A skill is a named set of instructions Claude can call on, and some skills have more than one name. Claude Code no longer knows about the claude-ai: prefix. Only anthropic-skills remains, and claude-ai: names are no longer translated to or from anthropic-skills:.
At the same time:
- A plugin skill named like
name:namecan now also be calledanthropic-skills:nameor plainname, plus any aliases it declares. - A synced or plugin skill named
anthropic-skills:namealso gains aname:namestyle alias.
Why
Old references to a skill as claude-ai:skill may stop working, while plugin skills become reachable by shorter names.
Names in the bundleclaude-ai:anthropic-skills:
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
It is not known whether anything still produces `claude-ai:` skill names.
Anthropic's release notes agree
Reverted the 2.1.282 reservation of the claude-ai name: skills, commands, workflows and MCP servers' skills and prompts so named load again…