I Built a Claude Code Plugin That Blocks Hallucinated Package Versions

The Problem If you use Claude Code (Anthropic's CLI coding agent), you've probably seen it do things like: npm install [email protected] ...when the latest version is actually different, or worse — install a version that doesn't even exist on the registry. Claude hallucinates package versions just like it hallucinates everything else. This is a supply-chain risk. You end up with outdated deps, missing security patches, or broken installs. The Solution: Version Sentinel I built Version Sentinel — a