The MIT Proto distribution includes several manuals:

Thinking in Proto Tutorial (also available online using WebProto)

Proto Quick Start

Proto Simulator User Manual

Proto Language Reference

MIT Proto Developer’s Guide

You may also wish to consult the Proto section of this swarm robotic spatial computing tutorial given at RoboComm 2009, along with its accompanying live demo code. A number of tutorials focused on other areas are available at the same site.

Bug-tracking is handled at:

Proto mode files are available for Emacs: proto-mode.el and for vi: proto.vim