feat(addisai): add STT and TTS plugin

[ZelalemGizachew]

What I added

This adds an AddisAI plugin for LiveKit Agents on Node.js so Amharic and Afaan Oromo voice agents have the same direct provider support as the Python SDK.

• Batch STT with AddisAI addis-whisper for am and om
• Non-streaming TTS with Addis Voices 2 for am and om
• Stable provider idempotency keys across retries, with a fresh LiveKit output request ID for every attempt
• LiveKit error mapping, timeouts, metrics metadata, and non-streaming adapters
• Package README, TypeDoc/API report, changeset, and a Gemini voice-agent example
• Hermetic tests for request/response mapping, WAV handling, language validation, retries, and error behavior

Addis Voices 2 returns complete clips rather than partial streaming audio, so the plugin requests WAV-wrapped 16 kHz PCM and lets the Agents framework adapt it into the TTS pipeline. AddisAI STT is batch-only; AgentSession's VAD adapts it to conversational turns.

Validation

• pnpm --filter @livekit/agents-plugin-addisai build
• pnpm --filter @livekit/agents-plugin-addisai lint
• pnpm exec vitest run plugins/addisai/src — 14 passed
• pnpm --filter @livekit/agents-plugin-addisai api:check
• Standalone example TypeScript check
• Live AddisAI Amharic TTS → STT round trip

Companion Python plugin and docs

Companion Python contribution: livekit/agents#6601

Once both packages are merged and released, I would like AddisAI to be listed for both Python and Node.js in the STT and TTS provider tables, with AddisAI STT and TTS guides containing tabs for both SDKs. The current documentation source is not present in LiveKit's public docs repository, so the Python PR includes the coordinated listing request and both package READMEs contain docs-ready installation, authentication, usage, parameters, language support, and resource links.

[changeset-bot]

🦋 Changeset detected

Latest commit: bf2ddcb

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 40 packages

Name	Type
@livekit/agents-plugin-addisai	Patch
@livekit/agents	Patch
@livekit/agents-plugin-anam	Patch
@livekit/agents-plugin-anthropic	Patch
@livekit/agents-plugin-assemblyai	Patch
@livekit/agents-plugin-azure	Patch
@livekit/agents-plugin-baseten	Patch
@livekit/agents-plugin-bey	Patch
@livekit/agents-plugin-cartesia	Patch
@livekit/agents-plugin-cerebras	Patch
@livekit/agents-plugin-deepgram	Patch
@livekit/agents-plugin-did	Patch
@livekit/agents-plugin-elevenlabs	Patch
@livekit/agents-plugin-fishaudio	Patch
@livekit/agents-plugin-google	Patch
@livekit/agents-plugin-hedra	Patch
@livekit/agents-plugin-hume	Patch
@livekit/agents-plugin-inworld	Patch
@livekit/agents-plugin-krisp	Patch
@livekit/agents-plugin-lemonslice	Patch
@livekit/agents-plugin-liveavatar	Patch
@livekit/agents-plugin-livekit	Patch
@livekit/agents-plugin-minimax	Patch
@livekit/agents-plugin-mistral	Patch
@livekit/agents-plugin-mistralai	Patch
@livekit/agents-plugin-neuphonic	Patch
@livekit/agents-plugin-openai	Patch
@livekit/agents-plugin-perplexity	Patch
@livekit/agents-plugin-phonic	Patch
@livekit/agents-plugin-protoface	Patch
@livekit/agents-plugin-resemble	Patch
@livekit/agents-plugin-rime	Patch
@livekit/agents-plugin-runway	Patch
@livekit/agents-plugin-sarvam	Patch
@livekit/agents-plugin-silero	Patch
@livekit/agents-plugin-soniox	Patch
@livekit/agents-plugin-tavus	Patch
@livekit/agents-plugin-trugen	Patch
@livekit/agents-plugin-xai	Patch
@livekit/agents-plugins-test	Patch

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

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