Claude Code adds mods, plugins that can change deeper behavior
Claude Code 2.1.287 adds Claude Mods, which let plugins modify deeper behavior, plus a built-in mod that runs a side agent alongside a session.
PluginsAll tags
Claude Code syncs claude.ai skills and plugins into the terminal
Claude Code 2.1.275 syncs a user's claude.ai skills and plugins into terminal sessions signed in with that account, with a setting to turn it off.