Programs crash. And when they do, they dump core, and we want to tell the user which package, including the version, caused the failure. This talk describes a compact JSON-based format that is embedded directly in the binaries as an ELF note. By embedding the this information directly in the binary object, package information is immediately available from a core dump, independently of any external packaging metadata. This is a cross-distro collaboration, with the eventual goal of having the same metadata automatically added by all distributions.