feat(aws): add bedrockApiKey, bedrockApiSecret, bedrockApiSessionToken to ChatBedrockConverse

[Hunter Lovell (hntrl)]

Summary

Add bedrockApiKey, bedrockApiSecret, and bedrockApiSessionToken fields to ChatBedrockConverse, matching the Python langchain-aws ChatBedrockConverse.bedrock_api_key / bedrock_api_secret pattern.

This makes it easier to pass AWS credentials directly to the Bedrock client without constructing a credentials object manually, and automatically picks up the BEDROCK_AWS_ACCESS_KEY_ID, BEDROCK_AWS_SECRET_ACCESS_KEY, and BEDROCK_AWS_SESSION_TOKEN environment variables.

Changes

@langchain/aws

src/chat_models.ts

• Added bedrockApiKey, bedrockApiSecret, and bedrockApiSessionToken to ChatBedrockConverseInput interface and class fields
• Updated constructor credential resolution order: explicit credentials > bedrockApiKey/bedrockApiSecret > defaultProvider()
• Registered new fields in lc_secrets for proper serialization redaction

src/tests/chat_models.test.ts

• Added 7 unit tests covering constructor usage, env var fallback, priority over default provider, string model shorthand, and lc_secrets inclusion

[changeset-bot]

🦋 Changeset detected

Latest commit: 3dd123d

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

This PR includes changesets to release 1 package

Name	Type
@langchain/aws	Patch

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