Safer Checkpoint File Format about composer HOT 1 OPEN

@mbway Thanks for flagging this -- we're currently actively working on a major redesign of checkpointing that will include migrating to a safer format. We've been hesitant to change how checkpointing works as we deeply care about backwards compatibility, so we have been buffering up a long list of features we will now include in the revamp. You should start seeing things roll out this month.

CC: @eracah it might be good to publicly share a version of the roadmap as a RFC when its ready

If you already have a PR, please feel free to post it -- it's probably helpful for us to view a design and gain some inspiration. Given the refactor though, we likely wouldn't accept it as this seems like a big change.

from composer.