I see this at the end of the README

> Swiftlet was built in collaboration with Claude Code.

Did this really happen (some sort of working with Anthropic or Claude Code team) or is it some kind of requirement when you develop some software with Claude Code (I see the other author is: https://github.com/claude), or sort of reuse some of its parts?

Is it like someone saying "built in collaboration with VS Code" or ".. in collaboration with <xyz> autocomplete plugin"?

Or merely a disclaimer about vibe-coding or AI written tool?