Related GitHub Issue

Addresses: #9481

Description

This PR attempts to address Issue #9481 by fixing the backend ARN validation in src/api/providers/bedrock.ts to support AWS GovCloud (aws-us-gov) and AWS China (aws-cn) region ARNs.

While PR #10110 fixed the webview validation, there was still a strict regex in the backend parseArn() method that only accepted arn:aws: prefix. This fix updates the regex to also accept:

• arn:aws-us-gov: (AWS GovCloud)
• arn:aws-cn: (AWS China)

Changes

• Updated the ARN regex in parseArn() from:

  /^arn:aws:(?:bedrock|sagemaker):...$/

  to:

  /^arn:(?:aws|aws-us-gov|aws-cn):(?:bedrock|sagemaker):...$/

• Added comprehensive tests for:

  • AWS GovCloud ARN parsing
  • AWS China ARN parsing
  • GovCloud custom ARN handler construction
  • China region custom ARN handler construction
  • Region mismatch detection in GovCloud ARNs

Test Procedure

1. Run tests: cd src && npx vitest run api/providers/__tests__/bedrock.spec.ts

All 54 tests pass, including 6 new tests for GovCloud/China ARN support.

Pre-Submission Checklist

• Issue Linked: This PR is linked to an approved GitHub Issue (see "Related GitHub Issue" above).
• Scope: My changes are focused on the linked issue (one major feature/fix per PR).
• Self-Review: I have performed a thorough self-review of my code.
• Testing: New and/or updated tests have been added to cover my changes.
• Documentation Impact: I have considered if my changes require documentation updates.
• Contribution Guidelines: I have read and agree to the Contributor Guidelines.

Documentation Updates

• No documentation updates are required.

Additional Notes

Feedback and guidance are welcome.