Michael T. DeGuzis mdeguzis

Steam Depot Data: How SteamDB Gets It and How We Can Replicate It

Deep dive into Steam's depot system, how SteamDB tracks depot creation/update dates, and practical approaches for proton-pulse-web to replicate this functionality.

The Core Problem

Steam's official public Web API (partner.steamgames.com/doc/webapi) does not expose per-depot timestamps, manifest history, or OS-specific update dates. The store/api/appdetails endpoint returns app-level release dates but nothing about individual depots. We need this data to show users when a game's Linux depot was first added and when it was last updated.

How Steam's Depot System Works

Global Claude Rules

Proton Pulse Web Checkpoint - 2026-06-17

Current state

HEAD: 26acbd850 on main -- all CI green, staging and prod in sync.

Live site: https://www.proton-pulse.com/ Staging: https://mdeguzis.github.io/proton-pulse-web-staging/

What was done this session

How to Actually Mute Toast Sounds in Decky Loader Plugins

playSound: false does not work. Here is why, and what does.

The Problem

Decky Loader's toaster.toast() accepts playSound?: boolean and sound?: number, but neither field silences the sound in practice.

What Decky actually sends to Steam

Fix: `UNAUTHORIZED_NO_AUTH_HEADER` on Supabase Edge Function Steam OpenID Callback

Problem

When using a Supabase Edge Function as the openid.return_to target for Steam OpenID 2.0 authentication, Steam's redirect back to the function fails with:

{"code":"UNAUTHORIZED_NO_AUTH_HEADER","message":"Missing authorization header"}

	# Decky Loader — AI Development Policy (Claude Steering)

	According to the current consensus among the Decky Loader maintainers and community guidelines,
	using AI to develop plugins is acceptable but subject to strict scrutiny during the PR process.

	## 1. Core Policy: "Supplementary, Not Central"

	- Assistive Use (OK): Using AI for boilerplate, API calls, database strings — standard modern workflow.
	- Generative Creators (Discouraged): AI as the effective "author" is a red flag — subtle bugs, security holes, unoptimized code the submitter can't explain.
	- AI Wrappers (Likely Denied): Plugins that are simply wrappers for ChatGPT/Claude etc. are discouraged. Prefer plugins providing functional utility to the Steam Deck interface.

	(async () => {
	// 1. Ask the user for the keyword
	const SEARCH_TERM = prompt("Enter the exact keyword of the events you want to delete:", "Meeting");

	if (!SEARCH_TERM) {
	console.log("Deletion cancelled: No keyword provided.");
	return;
	}

	const confirmAction = confirm(`Are you sure you want to delete all visible events containing: "${SEARCH_TERM}"?`);

	-480p - Run tenfoot in 480p rather than 1080p
	-720p - Run tenfoot in 720p rather than 1080p
	-accesscode -
	-all_languages - show longest loc string from any language
	-bigpicture - Start in Steam Big Picture mode
	-blefw -
	-cafeapplaunch - Launch apps in a cyber cafe context
	-candidates - Show libjingle candidates for local connection as they are processed
	-ccsyntax - Spew details about the localized strings we load
	-cef-disable-breakpad - disables breakpad in crash dumps

	#!/bin/bash
	# Author Michael DeGuzis
	# Description: Simple script to grab the latest Proton GE without a git clone / build.

	steam_type=$1
	native=1
	flatpak=1
	steamos=1

	if [[ -z ${steam_type} ]]; then

	#!/usr/bin/env python3
	# convert json to yaml
	# http://pyyaml.org/wiki/PyYAMLDocumentation
	# python3 json2yaml.py < ~/code/manpow/moneybug/mbuploader/support/offices.json
	# gist https://gist.github.com/noahcoad/46909253a5891af3699580b8f17baba8

	import yaml, json, sys
	sys.stdout.write(yaml.dump(json.load(sys.stdin)))