great-on-deck-search VS node-steam-user

There's a Show Great on Deck on Steam plugin you can use in browsers on the Deck, if you're fine using a browser rather than the client for the store. (If using a browser, you can also use the Augmented Steam plugin which adds a ton of useful functionality to the store too)

Those two sound very good, could you do me a favor and create an issue on the github page? https://github.com/cptpiepmatz/great-on-deck-search/issues

Also I made a repo you can install this extension: https://github.com/cptpiepmatz/great-on-deck-search

https://github.com/DoctorMcKay/node-steam-user is a popular NodeJS library for writing steam bots. This could provide useful, but iirc the method this uses for login will only allow you to have one login session at a time. Steam will automatically kick you out with a "logged in elsewhere" error.

https://github.com/DoctorMcKay/node-steam-user/blob/master/examples/databasedownloader.js - then you can follow the code here to list the game info thanks :D

Depends on what language you're using for JavaScript I think the defacto is anything Doctor McKay makes https://github.com/DoctorMcKay/node-steam-user, https://github.com/DoctorMcKay/node-steam-user etc. If you use python, I'd recommend https://github.com/Gobot1234/steam.py (I'm totally not biased). If you use C# then SteamKit is always a good option. If you use rust then SteamHelper looks interesting although doesn't support too many trading bot features

I don't know any direct resources for learning how the Steam network works, smart people figured it out over many years and lots of reverse engineering. I just know a few programming libraries which you can use to interact with it, the most popular two being Steam-User (JavaScript) and SteamKit2 (.NET).

One way you can do this, is by using the "steam user" node module node-steam-user. to play the games. And use the api call to Steam_Web_API to get the playtime of each of the games the account have.