The framework was not intended to be universal or public. Source code was published on GitHub for my own convenience only. Anyhow, it's not particulry interesting in any way. Mostly ugly legacy code :)

mii - is tiny php-framework, borned as fork of Kohana, but transofrmed over time more in Yii2 direction. For about 10 years several dozen web projects are successfully working on mii.

Main values: simplicity, speed, minimal overhead.

The whole story of mii's development is search for a balance/compromise between ease of development and the qualities above. So, conceptual purity, versatility, good design patterns - all this is not about mii :) But serving 100-300k visitors on 5 bucks vps without any fullpage cache? Easy! :)

It has had some original ideas, e.g. about organizing templates in blocks system with some naming conventions (for css), but it's not so hot in modern JS era.

Nope, sorry. There are some texts in ./docs, but they are very old, like six-major-releases-back old.