@CRusso at First i apologize for other user here who dont know any better and just brush it off with its not possible
Your idea is certainly possible i did an Acitivity Based Workflow Trigger back in 2023 June still works to this day with renrollment enabled and it triggers based of activity creation
if you still need this just reply or DM me
Trigger is last modified date on the company as an event trigger you can renenroll that.
the gist of it then is to copy assigned to owner from the recently created activity to a another custom owner property filter onto that
copy over the information from the activity into another custom property on the company
and then the interesting part
you need 2 single line text properties and a calculation property
1) property is needed to copy in the current record id of the activity in
2) single line text property is set to the record id of the recently created activity after the action you want to do (send a slack info/APi call whatsoever)
3. the calc property is boolean string and goes like if property 1== property 2 then true or false and you branch based on true or false so that you dont always execute the action whenever something changes in the company but only when a activity is created
thats pretty much it if you also want to execute actions when something changes on the activity
this is also possible but this one i dont share publicly ^^’