Machine-readable index of Steam KB agent-reference pages (Unity-focused, phase 1 of an ongoing rollout — see each article’s own page for scope notes). Not linked from site navigation. Human-readable articles live under heathen.group/kb/; this index exists so an AI coding agent landing on any Steam KB article can find every other topic’s agent-ref page from one place.
Status: all 17 Steam KB articles now have Unity, Godot, and O3DE agent-reference content (2026-07-29). Every article’s code in all three engines was verified directly against Foundation/Toolkit source — real API drift (renamed classes, stale event patterns, typos, wrong signatures, mismatched receiver types) was found and fixed across most articles, not just documented separately. Several genuine per-engine tier differences were also found this pass — e.g. Remote Play and Cloud Save are free (Foundation-tier) on Godot/O3DE but paid (Toolkit-tier) on Unity, the opposite of the general rule. Unreal is deliberately deferred — its Blueprint content is screenshot/image-based, too expensive to verify this way; revisit once Unreal 6’s text-based scripting ships, or if a better verification method turns up sooner.
Foundation vs. Toolkit — what the tags mean
[Foundation] = Heathen’s Foundation for Steamworks: FOSS, free, no purchase needed. Gives complete, real access to App/DLC identity, User (persona/avatar/online status), Stats, Achievements, and Leaderboards — not a crippled trial, the genuine ergonomic API for these features.
[Toolkit] = Heathen’s Toolkit for Steamworks: the paid Pro layer. Required for anything with real interactivity — Lobbies/Matchmaking, Inventory, UGC/Workshop, Overlay, Voice, Remote Play/Storage, Parties, Screenshots, Timeline, Game Servers, Clans, and Friends beyond basic persona data. Foundation ships only the raw plumbing/data types for these; the ergonomic API (the thing a developer actually wants to call) is Toolkit-only.
Articles
- Workshop [Toolkit] — agent-ref-steam-workshop
- Voice [Toolkit] — agent-ref-steam-voice
- User [mixed — see page] — agent-ref-steam-user
- Stats [Foundation] — agent-ref-steam-stats
- Remote Play [Toolkit] — agent-ref-steam-remote-play
- Party [Toolkit (mostly)] — agent-ref-steam-party
- Overlay [Toolkit] — agent-ref-steam-overlay
- Lobby [Toolkit] — agent-ref-steam-lobby
- Leaderboards [mixed — see page] — agent-ref-steam-leaderboards
- Inventory [Toolkit] — agent-ref-steam-inventory
- Input [Toolkit] — agent-ref-steam-input
- Downloadable Content [mixed — see page] — agent-ref-steam-downloadable-content
- Game Server Browser [Toolkit] — agent-ref-steam-game-server
- CSteamID [mixed — see page] — agent-ref-steam-csteamid
- Cloud Save [Toolkit] — agent-ref-steam-cloud-save
- Authentication [Toolkit] — agent-ref-steam-authentication
- Achievements [Foundation] — agent-ref-steam-achievements
This pass covers Unity only — Godot/Unreal/O3DE freshening for these same articles is a planned second pass.