wp-calypso/client/state/data-layer/wpcom/sites/comments/README.md

Site Comments

Fulfills COMMENTS_LIST_REQUEST actions by grabbing a list of recent comments from the site comments API endpoint. Currently uses the COMMENTS_RECEIVE action since the comment reducers already exist for this, but in the future this should be changed to a more semantic action like COMMENTS_ADD when it becomes available. When comments come back which belong to different posts this will dispatch multiple COMMENTS_RECEIVE actions - one for each post. This is a consequence of the way that the comment reducers were originally built.