Phone a Friend или uttero

Phone a Friend is a CLI relay that lets AI coding agents collaborate by sending prompts and repository context to other AI backends. It supports Claude, Codex, Gemini, and Ollama as relay targets. Agents can get second opinions, run multi-agent sessions with persistent communication, and stream responses in real time. It includes an interactive TUI dashboard, TOML configuration, and agentic orchestration mode for multi-agent collaboration.

Uttero is a voice channel that lets Claude Code take and make phone calls during a coding session. An incoming call arrives as a channel notification; Claude hears the caller's transcription, speaks back via TTS through the `reply` tool, and keeps editing your codebase between turns. Works like a live collaborator who happens to be on a phone line. Tools exposed: reply (speak), call_user (outbound), end_call, list_calls. Audio, transcription, and TTS are handled by Uttero's hosted backend (api.uttero.dev). The plugin itself is ~500 lines of TypeScript that speaks MCP stdio and authenticated HTTPS. Credentials are stored locally at ~/.uttero/credentials.json (mode 600) and never shared with callers. The plugin deliberately omits `capabilities.experimental['claude/channel/permission']` so voice callers cannot approve Bash/Write/Edit tool use.