Just to give some food for thought, I actually think it’s a mistake to connect smoke circuits to controversial AFCI breakers that have a history of problems and recalls. And if the AFCI shuts down the circuits right away, but a fire still starts, you have just lost what I think is the single biggest life saving provision ever added to the residential codes to warn people to get out of a burning wood building.
Also, if the smokes are interconnected/hardwired (required) with a separate dedicated circuit (I think they should be), it could be considered a “fire alarm system” and Section 760.21 of the latest NEC could be read to actually prohibit that circuit from being connected to a GFCI or AFCI device.
I have also heard that a work-around for possible conflicting NEC sections is to wire the dedicated smoke circuits to a 10A standard breaker (210.12 requires AFCI protection for only 15A and 20A bedroom circuits).
JMO and 2-nickels …