<arc_runtime> Requires the full Arc bundle. Arc-owned paths (agents/, references/, disciplines/, templates/, scripts/, rules/, skills/) resolve from the plugin root — the directory containing agents/ and skills/. Everything else is the user's repository.

Prompt-only installers (skills.sh and similar) copy SKILL.md files without Arc's bundled material. If a workflow needs Arc-owned files and only prompt-only skills are present, stop early and tell the user to upgrade to the full Claude, Codex, or Cursor plugin install. </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.

Arc has a broad workflow surface. Use this skill as the small control plane that decides how to route work without loading every workflow into context at once.