I will be speaking in relation to Minecraft modding specifically here, this principle can be applied to other games' mods also.

Problem (As Mod Dev): When releasing a new version of a mod which I know contains breaking changes, I am concerned about how to inform ModPack developers of such changes.

Problem (As a ModPack Dev): When going to update my modpack, I am sure to update all mods. Quite often, one of the mods I updated has had a breaking change, causing crashes to my modpack. Now I am tasked with sifting through possibly hundreds of downloaded and updated mods to find which one has the breaking changes.

My Proposed Solution: Give Mod Developers the option to mark a mod update file with a *Breaking Changes* flag.

Updated Experience (As Mod Dev): I know I have flagged my mod update file as having breaking changes.

Updated Experience (As a ModPack Dev): I have updated my mod-list through Curseforge, I can see that one of the mod updates has been flagged as breaking changes, I now know to keep that mod in mind if anything breaks.

Additional Suggestions: As a complimenting feature to aid with this all too common issue, when doing any mod updates, whether bulk or single, a folder of dated change-log files could be made or added to. this could give a mod-pack developer an even higher chance at finding mods which could be crashing or causing issues.

Post Script. These Ideas are incredibly useful ground work towards creating a UX which enables Mod and modpack developers to build and release with confidence and in a more timely manner.