Ciara and Future have NOT reached a peace accord -- she's just slapped him with a lawsuit for calling her a controlling bitch and questioning her mothering skills.
In the lawsuit, obtained by TMZ ... Ciara says her baby daddy has been on a year-long campaign against her and her new BF Russell Wilson -- and she says it was all done to gain publicity for his new music.
She calls him out for a radio interview last summer where he discussed a now infamous photo of Wilson pushing Ciara and Future's son in his stroller.