Just to share my experience here
Application received June 29, 2017
Got married Oct 2017
Added Spouse May 2017
Spouse Open work permit Oct 15, 2018
Spouse name added on GC Key Oct 22, 2018
Medical request for me Oct 25, 2018
send a webform to add dependent on Nov 17,2018
IRCC officer contacted me through my email on November 18 asking all details about my daughter and all the forms, send them as an attachement to his email that ends with gc.ca
Added my Daughter November 18, 2018
My daughters Medicals November 19,2018
Passport Request for my dependents wife and daughter since they were still outside canada December 4,2018
FYI, IRCC didnt ask for my passport, instead, i was told to go and do my landing at a CIC office in Fredericton NB.
Landed on December 5, 2018.