First off, nice tool! I was specifically looking for an easy way to search a Vault and grep fits the bill nicely. It would be nice to have a way to change strings recursively in Vault as well ala an in-place "sed". Flags could be used to apply only for keys, values or both. It'd make configuration changes very easy across multiple paths (which in our usage maps to different services).

Supporting regex on it (and grep for that matter) would be a big bonus.