Agent Skills: ring:generating-llms-txt

Generating or auditing a repository's llms.txt per the llmstxt.org spec, and creating CLAUDE.md / AGENTS.md when missing, by analyzing README, build files, docs, and API surface. Use when creating an llms.txt, auditing an existing one for spec compliance and live links, or improving a repo's AI readability. Skip when the llms.txt is current, the task is code-only with no doc scope, or the repo needs no LLM discoverability.