Skills Index Snippets

This is meta-infrastructure for skill repositories: it helps you generate and maintain routing snippets that go into AGENTS.md or CLAUDE.md files so coding assistants know which skills to invoke for which tasks. You get two formats: a readable markdown routing table and a compressed Vercel-style index that saves tokens. It's designed for the dotnet-skills repository but the pattern works anywhere you have a collection of skills that need dispatching. The workflow is straightforward: when you add or remove skills, update plugin.json, run the generator script, and copy the snippet into downstream repos. Honest take: this is housekeeping that pays off if you maintain skill collections and find assistants aren't invoking the right ones without explicit routing hints.