Kilo Code — Multi-Provider Speech Synthesis

This fork adds a full Speech tab to Kilo Code — hear AI responses spoken aloud with 6 text-to-speech providers, all with free tiers. Works out of the box with zero setup using the built-in Browser provider.

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Speech Feature Highlights

Works immediately — no API keys, no accounts, no cost. The Browser provider uses your system's built-in speech engine. Want premium neural voices? Add an API key for any of the 5 cloud providers — all have generous free tiers.

Provider Selector

Choose from 6 providers, organized by setup requirement:

Provider	Free Tier	Voices	Setup
Browser (Web Speech API)	Unlimited, offline	System voices	None
Azure Cognitive Services	500K chars/month	125+ neural voices	API key
Google Cloud TTS	4M chars/month	21 Neural2 + Studio	API key
OpenAI TTS	$5 free credit	10 voices	API key
ElevenLabs	10K chars/month	10 expressive voices	API key
Amazon Polly	5M chars/month (12 mo)	20 voices, 7 locales	Access key

Full Settings View — Azure Configured

The complete Speech tab with Azure connected, auto-speak enabled, and voice browser showing 99 neural voices:

Browser Provider — Free & Offline

Zero-setup speech using your operating system's built-in voices. Works offline, no account needed:

Voice Browser & Fine-Tuning

Browse voices by locale, preview them, set favorites, and fine-tune pitch, rate, emphasis, and custom pronunciations:

More Screenshots

Azure Voice List with Favorites

Voice Fine-Tuning Detail

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Key Capabilities

• Auto-Speak — AI responses are spoken automatically when they finish
• Stop on Typing — Speech interrupts instantly when you start typing
• Interaction Modes — Assist (important responses only), Conversation (all replies), or Minimal (on request)
• Sentiment Detection — Voice pitch and rate shift to match emotional tone
• Multi-Voice Dialogue — Each AI agent speaks in a distinct voice
• Voice Favorites & Presets — Star voices you like, save full configurations as presets
• 25-Rule Text Filter — Strips markdown, code blocks, URLs, and formatting before speaking
• LRU Synthesis Cache — Repeated phrases play instantly from a 32-entry cache
• SSML Support — Full SSML, styles, emphasis, and pronunciation controls (provider-dependent)

Architecture

SpeechProvider (interface)
    |
    +-- BrowserProvider      (Web Speech API, offline)
    +-- AzureProvider        (wraps existing tts-azure.ts)
    +-- GoogleProvider       (REST, base64 audio response)
    +-- OpenAIProvider       (REST, Bearer auth)
    +-- ElevenLabsProvider   (REST, xi-api-key header)
    +-- PollyProvider        (REST, AWS auth)
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SpeechProviderRegistry      (register / get / list / listByTier)
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speech-playback.ts          (provider-agnostic play/stop/cache)
    |
SpeechTab.tsx               (Settings UI, Solid.js)

• Provider Interface — getVoices(), synthesize(), stop(), testConnection()
• Capability Gating — UI controls appear/hide based on provider.capabilities
• CSP Whitelisted — All provider endpoints added to webview connect-src
• 95 Unit Tests — Registry, browser provider, azure provider, text filter + sentiment

Try It

Quick Install (VSIX)

# Download the VSIX from this fork's releases, then:
code --install-extension kilo-code-7.2.5.vsix

Build From Source

git clone https://github.com/AiDave71/kilocode.git
cd kilocode
bun install
cd packages/kilo-vscode
node esbuild.js        # builds 5 bundles
npx @vscode/vsce package --no-dependencies
code --install-extension kilo-code-7.2.5.vsix

First Run

1. Open Kilo Code Settings
2. Click the Speech tab in the sidebar
3. It defaults to Browser (Web Speech API) — works immediately
4. Enable Speech, click a play button next to any voice to preview
5. Optional: select a cloud provider and enter an API key for neural voices

Contributing

This feature is submitted as PR #8839 to the upstream Kilo Code repository. Feedback, testing, and reviews are welcome!

• Branch: feat/azure-voice-studio
• Tests: bun test in packages/kilo-vscode — 95 tests across 4 files
• Lint: 0 errors across 14 speech-related files
• Build: 5 esbuild bundles, 0 errors

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Original Kilo Code README

About Kilo Code

Kilo is the all-in-one agentic engineering platform. Build, ship, and iterate faster with the most popular open source coding agent.

• Generate code from natural language
• Checks its own work
• Run terminal commands
• Automate the browser
• Inline autocomplete suggestions
• Latest AI models
• API keys optional

Quick Links

• VS Code Marketplace (download)
• Install CLI: npm install -g @kilocode/cli
• Official Kilo.ai Home page (learn more)

License

This project is licensed under the MIT License. See License.

Where did Kilo CLI come from?

Kilo CLI is a fork of OpenCode, enhanced to work within the Kilo agentic engineering platform.