Ask HN: An equivalent to passwordstore.org for contacts and calendars?

I love zx2c4's password-store plugin: command line based, git for version control and sync, a handy mobile app, support for OTPs, multiple users, the works. It is a great bit of software.

I'm wondering if anyone is familiar with something similar for contacts and calendaring? Requirements would be at minimum git (with sync functionality) and a sensible way to search and export to formats email and calendaring clients understand, plus a bonus if entries are GPG encrypted in the same way pass is.

If nobody knows of anything that fits the bill, I may well take it upon myself to write something, possibly as an extension to pass itself.