Research a Rails-ecosystem project (UI library, rendering library, admin framework, etc.) by fetching data from GitHub, its official website, RubyGems, and ruby.libhunt.com, then append a structured YAML entry to the appropriate _data/*.yml file. Use when the user wants to add a new project to the site's comparison tables.
Validate an existing project entry in `_data/*.yml` by re-fetching live data from GitHub, RubyGems, the official website, and ruby.libhunt.com. Reports any inaccurate, outdated, or missing fields. Use when the user wants to verify data accuracy or audit existing entries.