teams-for-linux is an unofficial, community-maintained Electron desktop client for Microsoft Teams, specifically targeting Linux desktop integration gaps. It wraps the Teams web SPA, adding native features like tray icons, system notifications, WebAuthn/FIDO2 hardware key support, MQTT home-automation integration, multi-account profile switching, custom themes/backgrounds, and an advanced configuration system with deprecation management. The architecture is modular, with a main process (Electron) coordinating IPC-secured preload scripts that inject browser tools into the Teams page. Key subsystems include a centralized config schema (single source of truth), a profile manager for isolated WebContentsView-based accounts, D-Bus and MQTT bridges for external control, and an extensive suite of unit and Playwright e2e tests. The project follows a rigorous ADR-driven decision process, automated release-please releases, and cross-distro Docker-based testing. While tightly coupled to the Teams web app's DOM and internal APIs, the codebase demonstrates high engineering craftsmanship with clear separation of concerns, security hardening (IPC allowlist, PII sanitization), and reusable patterns (secure dialogs, browser tool init pattern).