<arc_runtime> Arc-owned files live at the Arc plugin root for full-runtime installs.

Skills and agents reference Arc-owned files using bare relative paths from the plugin root: agents/, references/, disciplines/, templates/, scripts/, rules/, and skills/<name>/. Resolve the plugin root by walking up from a SKILL.md or agent file's location (it's the directory containing agents/ and skills/).

Project-local files stay relative to the user's repository (.ruler/, docs/, src/, etc.). </arc_runtime>

Using Arc

Arc's canonical product definition, domain language, and operating boundary live in CONTEXT.md at the Arc repository root. This skill applies that context at session startup.