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Inspection of ../SilverVPN/clients/SilverVPN.Client.Chat reveals a mature, production-grade SilverChat implementation: - Cross-platform MAUI client (Windows / macOS / Android / iOS) - 13 ViewModels + 13 Views — feature-complete UX (contacts, conversations, group chat, invites, safety numbers, settings, login) - Signal Protocol crypto: Double Ratchet, X3DH (PreKey + Identity stores), Safety Numbers, encrypted attachments - VpnChatTransport — chat carried over the SilverVPN tunnel itself, eliminating third-party metadata exposure - Server-side already in SilverVPN.Api: ChatHub (SignalR), ChatController, ChatAttachmentController, ContactsController - Windows MSI installer wired (installer/silverchat/SilverChat.wxs) Decision: adopt-as-is, do not duplicate. SilverChat is more advanced than the v1.1 plan (which considered Matrix / Signal-fork) — three wins: 1. Signal Protocol natively, not a tentative fork 2. Chat over the VPN tunnel — better metadata hygiene 3. Cross-platform on day one Changes: - stack/chat/README.md rewritten as integration pointer (mirror of stack/vpn/) - stack/README.md status table updated; SilverChat promoted v1.1 → v1 - docs/roadmap.md: new milestone 1.9 (Chat integration into Linux v1); Phase 1.1 alignment-review milestone removed (resolved by this finding); remaining 1.1 milestones renumbered - root README.md: Stack table + Status table updated Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
SilverLABS Application Stack
The cross-platform spine of SilverMetal. These apps replace the cloud services your device normally talks to. Same brand, same account, same data on every platform — whether the user picked a 🔒 SilverMetal OS flavour or a 🛡️ SilverMetal Enhanced flavour.
Components
| Component | Status | Purpose |
|---|---|---|
browser/ — SilverBrowser |
v1 (Linux MVP) | De-Googled, telemetry-free browser |
vpn/ — SilverVPN |
Existing — see SilverLABS/SilverVPN. This directory tracks integration only |
Always-on, no-logs VPN with our infrastructure |
sync/ — SilverSync |
v1 (Linux MVP) | Private replacement for iCloud/Google/OneDrive |
chat/ — SilverChat |
Existing — SilverVPN.Client.Chat is already production-grade (Signal Protocol, MAUI cross-platform, transport-over-VPN). Promoted from v1.1 to v1. This directory tracks integration only |
E2EE messenger |
duress/ — SilverDuress |
v1.1 | Duress password / panic-wipe |
keys/ — SilverKeys |
v1.1 | Zero-knowledge password + 2FA manager |
shared/ — common code |
ongoing | Account SDK, crypto primitives, branding |
Account model
Users get a SilverLABS account number (Mullvad-style — random, no email, no name). One account → all Stack apps. Payment is processed separately (SilverDotPay / cryptocurrency option) with no link back to the account number.
Cross-platform build philosophy
Each app is built natively per platform — no Electron sprawl where avoidable:
- Linux: native
.deb+ Flatpak - Android: native APK / AAB (or MAUI where SilverVPN already provides it)
- Windows: native MSI / EXE (signed)
- macOS: universal binary
.pkg(notarised) - iOS: App Store
SilverVPN's MAUI base already covers Windows / macOS / Android / iOS for VPN and Chat. For SilverBrowser / SilverSync / SilverKeys we'll evaluate per-app whether MAUI, Tauri/Rust, or native is the right pick.
v1 ship order
For SilverMetal OS — Linux v1:
- SilverBrowser — ungoogled-chromium-derived, our defaults, our update channel
- SilverVPN integration — existing product, integrated into our ISO with always-on defaults and kill-switch
- SilverSync — Nextcloud-backed (server side), client-side encryption, native Linux client
- SilverChat integration — existing product (Signal Protocol over the VPN tunnel); was originally v1.1 but the upstream is mature enough to ship in v1
Promoted from v1.1 → v1: SilverChat — because the existing implementation in SilverVPN.Client.Chat is far more mature than what we'd build from scratch.
v1.1 still adds Duress and Keys.
Server side
Server components live in separate repositories:
SilverLABS/SilverVPN— already exists; includes both VPN server stack and SilverChat backend (Hubs/ChatHub.cs+Controllers/Chat*)SilverLABS/silver-sync-server(to be created) — Nextcloud + Radicale + Baïkal stackSilverLABS/silver-account(to be created OR may live under SilverVPN) — account-number issuance + auth gateway
Self-hostable counterparts are documented for users who don't want to use SilverLABS infrastructure.