### What needs to get done Per ST119, kernel snaps need to be able to declare build-bases like `ubuntu@24.10`. Support interim kernel bases as documented in the proof of concept branch (https://github.com/canonical/snapcraft/pull/4914), except in a backward compatible way. The proof of concept branch can't be used directly for 3 reasons: - written for pydantic 1 - predates craft-platforms - backward incompatible ### Why it needs to get done So kernel snaps can be created for interim releases. Interdependencies: * This feature isn't particularly useful when snapcraft can't launch 24.10 build environments (https://github.com/canonical/snapcraft/issues/4921) * This will overlap heavily with https://github.com/canonical/snapcraft/issues/5015 and will require changes to craft-platforms