I'm not sure what you're proposing? Hashing the inputs to the build function and associating that with an image and using that checksum to determine if there's

I'm not sure what you're proposing? Hashing the inputs to the build function and associating that with an image and using that checksum to determine if there's a change? If so, that doesn't seem to solve the problem of reliably identifying inputs to include in the checksum in the first place, which is a big part of the problem. I imagine we could do the build in a container and use the Docker build cache to identify what things need to be rebuilt, but that doesn't seem like it would scale well since afaik there's no good way to share the cache across multiple nodes.