Reusable instruction packages. Call one from the composer to inject it into a conversation, and the assistant follows it for as long as it stays active.
What a skill is
A skill is a package in the standard Agent Skills format: an instruction file with structured frontmatter, plus any supporting files it references. Activating one injects its instructions into the conversation and enables a bounded two-tool loop so the assistant can read the skill's own bundled files as it works.
Installing and organising
Skills install from a packaged archive or from any public repository that publishes the standard marketplace manifest. A single archive may contain several skills, and each becomes its own entry. Nothing installs unread: the full instruction file is displayed before you confirm.
Where skills are stored
Installed skills and their bundled resources live in this browser's own storage, not on a server. They are included in backup exports, so a skill set moves between machines as a single archive.