Agda source notes - wjzz/NotesAndCheatsheets GitHub Wiki
Agda's doc on hackage: http://hackage.haskell.org/package/Agda-2.3.0
exports the generateHTML function that is invoked when the --html option is used http://hackage.haskell.org/packages/archive/Agda/2.3.0/doc/html/Agda-Interaction-Highlighting-HTML.html