voicebridge is a self-hosted voice interface for command-line AI coding agents. It consists of a small Node.js HTTP server (server.js) that spawns and pipes stdin/stdout to agent CLIs (Claude Code, Codex, Antigravity, Ollama), a browser-based web UI served from /public that uses the Web Speech API for speech-to-text and text-to-speech, a Flutter mobile app (in /app) for iOS/Android, and an Electron desktop control panel (in /desktop) that packages everything into a Mac DMG and Windows installer.

The problem it solves is friction and cost around voice interaction with coding agents. Existing agent CLIs are text-only, and third-party voice services like ElevenLabs charge per minute and route audio through their servers. voicebridge lets a developer speak to their agent from a phone while away from the keyboard, using the phone browser's built-in (free) speech recognition and synthesis, with the agent still executing locally on the developer's machine.

The intended users are developers who already use CLI-based coding agents and want hands-free or remote-from-couch operation. They install the desktop app or run the Node server, expose it over Tailscale HTTPS (required because Web Speech needs a secure context), and pair a phone by scanning a QR code. From then on the phone acts as a chat+voice client that streams prompts to and receives streamed responses from the agent running on the host.

Architecturally it is straightforward: a single Node process (one production dependency, qrcode-terminal) exposes a small HTTP/NDJSON API guarded by an optional Bearer ACCESS_TOKEN, manages multiple named sessions, and shells out to configured agent binaries (CLAUDE_BIN, CODEX_BIN, AGY_BIN). Replies are streamed sentence-by-sentence to the browser, which speaks them via SpeechSynthesis. Optional local Whisper (batch or WebSocket streaming) replaces browser STT for fully-local transcription. A reference cloud-runner example allows the agent to run on a different host. Auth, session, and health tests exist under /test.

The code is clean and coherent with its stated purpose: extensive documentation, CI workflows for Android/iOS/desktop releases, Electron secure-storage for tokens, and no signs of exfiltration or hidden network calls. The PolyForm Noncommercial license is real and restrictive — commercial use is prohibited. The .agents and .claude directories contain 'Keel' agent workflow skill definitions used by the maintainer's own dev tooling, not runtime code.