Greets a recipient through one of two registered tones — formal or casual — by dispatching to a dedicated capability. Activates when the conversation asks for a tone-specific welcome or a switch between formal and casual greetings; use when comparing the two styles. Demonstrates the router pattern in the Skill System Foundry — a thin SKILL.md entry point routing to capability files, with allowed-tools declared in frontmatter so capability shell fences pass validation.
