Early Stable Releases

I'm looking to programmatically get the early stable versions when they are released to dynamically update the pdls in the Selenium repo. I want to get Selenium releases out before production chrome is released to minimize warnings in people's logs.

For https://googlechromelabs.github.io/chrome-for-testing/last-known-good-versions.json
Will the stable version get updated only after the official stable release? Or can we get an EarlyStable tag in that file when it is appropriate?

I can do it manually if needed, just trying to automate more things in our build/release cycle. Thanks.