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  • Read aloud click the speaker icon on any assistant message to hear it spoken; click again to stop
  • Read File right-click any editor tab and choose Read File to hear the whole file read aloud
  • Read Selected select any text in the editor, right-click, and choose Read Selected
  • The agent can talk back turn on Jarvis Mode and the AI chat agent, plus Claude Code or any other CLI agent connected through coder-mcp, can speak a short spoken summary on its own, e.g. after finishing a long task while you were away
  • Three backends the OS’s built-in voices (free, instant), OpenRouter TTS models, or Cartesia’s streaming API (starts speaking before the whole clip finishes generating)
  • Per-model voices give different models their own personality, Claude gets one voice, GPT gets another, instead of everything sharing one default
  • One global Stop a Stop button appears in the title bar the moment anything is speaking, no matter which of the above started it
  • Off by default nothing here is on until you turn it on in Settings
This is Phase 1, Coder can speak to you. Phase 2 will close the loop: hands-free listening and full voice conversation, so “Jarvis Mode” becomes a real two-way mode instead of read-aloud with a good name.

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Turning it on

Speech Output lives in Settings → Models → Speech Output.
  1. Toggle Enable read-aloud on assistant messages, this turns on the speaker icon on chat messages, plus Read File and Read Selected.
  2. Pick a Backend (see below) and fill in its model/voice/key.
  3. Optionally toggle Let the agent speak a short summary on its own, this is the same setting the title bar’s Jarvis Mode button flips. Off by default; turning it on lets the agent decide when to speak, not just you clicking a button.
The title bar’s Jarvis Mode icon (next to Settings) is a shortcut for step 3, click it to toggle the agent’s own speak permission without opening Settings. It lights up solid when on.

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Backends

If read-aloud feels slow, that’s almost always OpenRouter waiting on a full MP3 to generate and download. Cartesia (streaming) or System (Internal) are both effectively instant.

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Voice groups, give models their own voice

Under Voice groups, click + Add Group to assign a specific voice to a specific model, separate from your default voice. Each group has:
  • A label, just for your own reference, e.g. “Claude” or “Luna”
  • A provider match, the Settings → Models provider key the model belongs to, e.g. anthropic or openai
  • An optional model match, a substring to narrow within that provider, e.g. luna to only match models with “luna” in their id
  • Its own full backend/voice/speed/volume config, same as the default
Groups are checked top to bottom; the first one that matches wins. If nothing matches, the default voice at the top of the section is used. This also covers Claude Code: since Claude Code isn’t running through Coder’s own model picker, it’s treated as provider anthropic for matching purposes, so a group targeting anthropic applies to both an in-app chat using a Claude model and a Claude Code session speaking through coder-mcp.

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Stopping playback

A red Stop button appears in the title bar automatically whenever anything is speaking, from any source. Click it, or click a speaker icon that’s already playing, to stop immediately. At most one thing speaks at a time; starting a new read-aloud stops whatever was already playing.

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Clean text

Speech text is cleaned before it’s sent to be spoken: markdown formatting (headings, bold, links, tables), emoji, and fenced code blocks are stripped out first, so you hear plain spoken sentences, not markdown syntax or code read character-by-character.