Which hook is called after `middleman serve` generates *.html, and where is them placed?

Hi, all.

I’m developing a custom extension ‘middleman-iepab’ that invokes the external pipeline after building: https://github.com/zacky1972/middleman-iepab

It works well in the build mode, but doesn’t work well in the server mode, because it can’t catch *.html files that are built by middleman.

Which hook is called after middleman serve generates *.html, and where is them placed?