feat(openai): add withAWSBedrock for OpenAI models on Amazon Bedrock

[piyush-gambhir]

Description

Adds Amazon Bedrock support to the OpenAI plugin, porting the Python livekit-agents work (livekit/agents#5978). Bedrock's OpenAI-compatible bedrock-mantle endpoint serves two model families on different paths, so this adds a withAWSBedrock(...) factory to both the Chat Completions and Responses LLMs:

Models	API on Bedrock	Mantle path	Factory
gpt-oss-120b, gpt-oss-20b	Chat Completions (+ Responses)	/v1	LLM.withAWSBedrock(...)
gpt-5.5, gpt-5.4	Responses only	/openai/v1	responses.LLM.withAWSBedrock(...)

Both build an openai BedrockOpenAI client. openai-node only derives the /openai/v1 path (gpt-5.x); the gpt-oss models live on /v1, so the path is resolved from the model id. The Responses variant disables the WebSocket transport automatically, since Bedrock only exposes the HTTP Responses path.

import { LLM, responses } from '@livekit/agents-plugin-openai';

const a = LLM.withAWSBedrock({ model: 'openai.gpt-oss-120b', awsRegion: 'us-east-2' });          // chat
const b = responses.LLM.withAWSBedrock({ model: 'openai.gpt-5.5', awsRegion: 'us-east-2' });     // responses

apiKey / awsRegion / baseURL are inferred from AWS_BEARER_TOKEN_BEDROCK / AWS_REGION (or AWS_DEFAULT_REGION) / AWS_BEDROCK_BASE_URL. apiKey and bedrockTokenProvider (refreshable credentials) are mutually exclusive.

Changes Made

• LLM.withAWSBedrock (Chat Completions) and responses.LLM.withAWSBedrock (Responses API)
• BedrockChatModels / BedrockResponsesModels types and the resolveBedrockBaseURL helper (routes gpt-oss → /v1)
• Declared AWS_* env vars in turbo.json (required by turbo/no-undeclared-env-vars)
• Added a changeset (minor) and hermetic tests (plugins/openai/src/bedrock.test.ts)
• Bumped openai to ^6.41.0 — the first release exporting BedrockOpenAI. This is why pnpm-lock.yaml has a large diff: the lock is otherwise stable under pnpm 9.7, but bumping openai makes pnpm re-resolve the dependency graph (the monorepo pins multiple vitest versions, so their transitive snapshots get re-expanded). pnpm install --frozen-lockfile passes against the updated lock.

Pre-Review Checklist

• Build passes: All builds (lint, typecheck, tests) pass locally
• AI-generated code reviewed: Removed unnecessary comments and ensured code quality
• Changes explained: All changes are properly documented and justified above
• Scope appropriate: All changes relate to the PR title (the lockfile growth is explained above)
• Video demo: N/A — this adds LLM constructors, no pipeline/UI behavior change

Testing

• Automated tests added/updated — plugins/openai/src/bedrock.test.ts (construction, /v1 vs /openai/v1 routing, credential mutual-exclusion)
• All tests pass — pnpm exec vitest run plugins/openai/src/bedrock.test.ts → 7 passed; pnpm build (incl. tsc declarations) clean; eslint/prettier clean; pnpm install --frozen-lockfile valid
• restaurant_agent.ts / realtime_agent.ts — N/A (no voice-pipeline change)

Additional Notes

The Python counterpart (livekit/agents#5978) was verified end-to-end against live Bedrock (gpt-5.5/5.4 via Responses, gpt-oss-120b via Chat Completions), confirming the model IDs, the /v1 routing, and bearer-token auth.

[changeset-bot]

🦋 Changeset detected

Latest commit: 220a89d

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

This PR includes changesets to release 34 packages

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

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