Moult library offers atomic plugin replacement to prevent mid-upgrade outages

A new open-source library called Moult addresses a critical flaw in plugin systems where a failed upgrade can destroy an existing capability before its replacement is ready. The library treats plugin replacement as a transactional protocol rather than a simple registry assignment, staging the new plugin in a private scope while the old one continues serving. Only after the new plugin passes verification does an atomic commit swap the active generation; if anything fails beforehand, the candidate is discarded and the previous plugin remains untouched. Moult targets long-running environments such as CLI daemons, code editors, dev tools, and AI-agent extension hosts where a restart is not a viable recovery option. The library ships with 145 tests run across Node and DOM environments, and documents 15 explicit runtime guarantees in its repository.