I can't find in the documentation how long the "sessions/<id>/extend" actually extends the session. Does anyone know how long it will extend it?

From my understanding this is an private server only endpoint. So you’ll need to validate the sesh first and make sure its not DDOS’d

Agreed, but I can't find anything that tells how long the extension is for? For example, if I have the session length set for 3 days, and I extend it after 1 day, does it extend it 2 days so that it is now back to the original 3 days or does it extend it for 3 days and now it is 4 days, etc, etc. Seems like there would be a param I could pass that would allow me to specify this.

No its based on config you setup on the server, see yaml file

I am looking at the yaml/json file. I see where you set the session lifespan. It is currently set to 72 hours. You can also set it in the Network console under session settings. Let's say that I get a session in from the user and call the following method: https://www.ory.sh/docs/reference/api#tag/identity/operation/extendSession Will it extend the session by the a full 72 hours or will it just extend it just enough to be another 72 hours total? Am I missing something?

Reset to 72

Did you find that in the docs or experiment? It was on my list for today to test and figure it out. Just curious.