Echidna is the central piece of software taking care of the new publication workflow at W3C. The plan is for Echidna and related sub-projects (see below) to automate the publication of new specs under http://www.w3.org/TR/.
https://github.com/w3c/echidna
In other words: in can not be used yet by Community Groups. See https://github.com/w3c/echidna/issues/197