Add instruction parts support

[rosetta-livekit-bot]

Summary

• Add modality-aware Instructions content and preserve it through chat context/provider formatting.
• Export beta workflow InstructionParts for modular workflow prompt customization.
• Preserve instruction content for realtime/remote/test formatting paths.

Verification

• pnpm build:agents
• pnpm build:plugins
• pnpm format:check
• pnpm lint (passes with existing warnings)

Notes

• pnpm api:check currently fails on existing repo configuration issues (api-extractor.json missing in some plugin packages; agents API Extractor rejects existing export * as syntax).
• No tests added, matching the source change.

[changeset-bot]

🦋 Changeset detected

Latest commit: 3daa751

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

This PR includes changesets to release 31 packages

Name	Type
@livekit/agents	Patch
@livekit/agents-plugin-anam	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-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-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-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-plugins-test	Patch
@livekit/agents-plugin-trugen	Patch
@livekit/agents-plugin-xai	Patch

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[devin-ai-integration]

Devin Review found 1 potential issue.

View 5 additional findings in Devin Review.

[devin-ai-integration]

🟡 Reference equality (===) on Instructions objects prevents realtime session reuse

At agents/src/voice/agent_activity.ts:603, this.agent.instructions === newActivity.agent.instructions uses strict equality (===). Previously instructions was always a string, so === performed value comparison (e.g., "hello" === "hello" is true). Now that instructions can be an Instructions class instance, === performs reference equality for objects — two separate Instructions instances with identical content will compare as false. This causes reusable to be false when midSessionInstructionsUpdate is not supported, forcing an unnecessary realtime session teardown and recreation during agent transitions, even when the instructions haven't actually changed.

(Refers to line 603)

Prompt for agents

In agents/src/voice/agent_activity.ts at line 603, the comparison `this.agent.instructions === newActivity.agent.instructions` uses reference equality for Instructions objects, which breaks value-based comparison that previously worked for strings. The fix should compare Instructions objects by their string representation (e.g. using `.toString()`) when they are not the same reference. One approach is to replace the `===` with a helper that does `a === b || (a.toString() === b.toString())`, or add an `equals()` method to the Instructions class and use it here. The comparison needs to preserve the existing string-vs-string value equality behavior while also handling Instructions-vs-Instructions and mixed cases correctly.

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[CLAassistant]

All committers have signed the CLA.