Garrow, Alan J.P. "Chapter Twelve: Matthew's Gospel and the Prophet Layer."The Gospel of Matthew's Dependence on the Didache. New York: T&T Clark International, 2004, 186-189.
Garrow finds just one link between the Didache's Prophet layer and Matthew, in Didache 11.7 and Matthew 12.31. Here Garrow takes Matthew to depend on the Didache, since the wording agrees with Mattew against Mark. Since Matthew sometimes draws from Mark, Luke, or the Didache, but the Didache oes not seem to draw from any conflation of Mark and Luke, Garrow thinks the dependence runs from the Didache to Matthew (Garrow 2004, 187). Though it's possible that both took the teaching of the unforgiveable sin from another source, Garrow thinks it unlikely that they would have used it in the same way. Therefore, he takes Matthew to depend here on the Didache (Garrow 2004, 189).