I shipped Web Bot Auth in one month: https://developers.cloudflare.com/bots/concepts/bot/verified-bots/web-bot-auth/
Web Bot Auth makes it possible for Cloudflare to charge AI crawlers for access to your website with confidence.
I wrote + open-sourced a Rust library for anyone to implement it themselves. It not only implements web bot authentication - it also implements RFC 9421 from scratch, so you can use it as "just" an HTTP message signatures library.
I built all of that logic into our edge network to verify a request automatically.
I single-handedly stood up all of the core infrastructure needed to register a new AI crawler as a verified bot: Kubernetes, Postgres, a new APi in Golang that other teams can call into.