Our project is currently using M3 and a colleague of mine had created an experimental branch using RC2 using workarounds to we are not pushing to any external environment, yet.

I would strongly urge you to not use milestone releases at this point - the sitemesh fixes that came in rc1 were significant. As for updating dependencies, we are trailing Spring Boot by less than a month now. Updating spring versions before spring boot does may come with unknows

https://docs.grails.org/snapshot/guide/upgrading.html#upgrading60x - is very comprehensive on changes

@James Fredley, thanks I followed that documentation when I did my local experiments with M4.

@jdaugherty my colleague added the following in our

build.gradle

// required for seed-me-gradle until they update their classpath
        substitute module('org.grails:grails-core') using module("org.apache.grails:grails-core:$grailsVersion")
        substitute module('org.grails:grails-web-boot') using module("org.apache.grails:grails-web-boot:$grailsVersion")
        substitute module('org.grails:grails-dependencies') using module('org.apache.grails:grails-dependencies:7.0.0-M5')
        substitute module('org.grails:grails-plugin-domain-class') using module("org.apache.grails:grails-domain-class:$grailsVersion")

to avoid upgrading seed-me to the new Grails. When I did my M4 tests I had seed-me ported to M4 in my local maven.

@jdaugherty we are not in production, we'll go with 7.0.0, someone you may know whose goes with the name of David Estes started the project using 7.0.0-M3.

It's all good, I've had a basic Grails 7 app in prod since October as a canary, I do wish it was more complex as it would have caught more issues. It's currently running on Java 24 with virtual threads with 1-2 weeks of changes post RC2. I don't recommend that for critical apps.

that fact the name of our repository ends with POC tells a lot. 🙂

I can tell you there are hard breaks between the milestone & RC. I wouldn't mix the grails versions - they're meant to be updated together during major development.

I'm trying to make a list of them