Allow direct image uploads for LemonSlice avatars

[rosetta-livekit-bot]

Summary

• Port Allow direct image uploads for LemonSlice avatars agents#6343 to the JS LemonSlice avatar plugin
• Add agentImage support for direct multipart avatar image uploads
• Preserve JSON session creation for agentId and agentImageUrl flows
• Add the LemonSlice API report and changeset for the public option change

Testing

• pnpm build:agents
• pnpm --filter @livekit/agents-plugin-lemonslice build
• pnpm --filter @livekit/agents-plugin-lemonslice lint
• pnpm test -- plugins/lemonslice/src/avatar.test.ts
• pnpm --filter @livekit/agents-plugin-lemonslice api:check

---

Ported from livekit/agents#6343

Original PR description

Instead of providing a url to an image or an ID to a LemonSlice avatar, users can now pass us an image directly.

agent_image = Image.open(Path(__file__).parent / "test-img.jpg")
avatar = lemonslice.AvatarSession(
    agent_image=agent_image,
    # Prompt to guide the avatar's movements
    agent_prompt="Be expressive in your movements and use your hands while talking.",
)

Note: our package now depends on Pillow.

[changeset-bot]

🦋 Changeset detected

Latest commit: 3a76705

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

This PR includes changesets to release 36 packages

Name	Type
@livekit/agents-plugin-lemonslice	Patch
@livekit/agents	Patch
@livekit/agents-plugin-anam	Patch
@livekit/agents-plugin-anthropic	Patch
@livekit/agents-plugin-assemblyai	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-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-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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Click here if you're a maintainer who wants to add another changeset to this PR

[devin-ai-integration]

Devin Review found 1 potential issue.

[devin-ai-integration]

🔍 Uploaded image MIME type is hardcoded to image/png regardless of actual format

The File constructor at plugins/lemonslice/src/avatar.ts:337-339 always uses type: 'image/png' and filename 'image.png', even if the user provides JPEG, WebP, or other image bytes. If the LemonSlice API validates the MIME type or uses it for format detection, non-PNG images could be rejected or misprocessed. Consider either accepting a MIME type option alongside agentImage, or using a generic type like application/octet-stream and letting the server detect the format.

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