[jitl]

Not exactly what you’re looking for, but related: https://camlistore.org/, see also https://camlistore.org/doc/overview

I thought of Camlistore because it’s goal is

> Camlistore is your personal storage system for life.

However, it’s more of a general storage system or diary than a quantified self application.

From the homepage:

> Camlistore is a set of open source formats, protocols, and software for modeling, storing, searching, sharing and synchronizing data in the post-PC era. Data may be files or objects, tweets or 5TB videos, and you can access it via a phone, browser or FUSE filesystem.

Camlistore was started by Brad Fitzgerald (Golang core member and Memcached author)