Theo Chat 1.0.0

Merges YouTube live chat into your Twitch chat view. YouTube messages appear inline in the native Twitch chat panel with a red YT badge. When YouTube mods delete a message or ban a user, those actions sync to the Twitch view instantly. Built for theo.gg — but works for any streamer who simulcasts to YouTube + Twitch.

Live site: t3yt.mikepfunk.com

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How It Works

YouTube goes live
       │
       ▼
YouTube PubSub push ───► [Railway service] ──(videos.list, 1 quota)──► gRPC stream
                               │
                               ▼ (WebSocket)
                        [Browser extension]
                               │
                               ▼ (DOM injection)
                         Twitch chat panel ─── YT messages + mod sync

Architecture

Three deployable surfaces:

Surface	Stack	Hosted on	Purpose
Service	Node.js + gRPC + ws	Railway	Connects to YouTube, relays chat via WebSocket, serves /overlay
Landing + API	Cloudflare Worker	Cloudflare	t3yt.mikepfunk.com landing, /api/config, /privacy
Extension	WebExtension MV3	Firefox/Zen/Chrome	Injects YouTube messages into Twitch DOM, popup control rig

Key features

• Zero-delay by default — messages appear instant
• Opt-in mod buffer — slider in popup lets Theo hold messages 0–30s so mods can delete on YouTube before viewers ever see them; deleted-while-buffered messages never render
• Instant mod sync — deletions and bans from YouTube mods reflect in the Twitch view immediately
• Super chats, member badges, owner badges pass through with proper styling
• Auto-reconnect on both the gRPC and WebSocket layers
• PubSub auto-renewal every 4 days (subscription lease is 5 days)
• Zero-config extension — fetches WS URL from t3yt.mikepfunk.com/api/config at startup; Theo never types a URL

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Full Changelog: https://github.com/MikePfunk28/theo_chat/commits/v1.0.0