This is version 2.0 of Chain Menu Access API for Drupal 7.
It is more tolerant with third-party modules that bogusly set access properties on MENU_DEFAULT_LOCAL_TASK items, at the cost of changing the API from 1.0.
Be sure to get the right version for your client module. If the client module still needs version 1.0, then please encourage the maintainer to update his/her module.
This is a major upgrade to 7.x-1.x, the first major work on coder (other than adding new rules) since the 6.x release. There are more features that still need to go into this branch, see #1745068: Coder Review Drupal 8.x Battleplan, but it's now stable enough for others to try.