[BUG] - API Error: 400 - eager_input_streaming not supported with AWS Bedrock for Claude Code For VS Code Extenstion

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Bug Summary
Claude Code extension v2.1.72 is sending an eager_input_streaming parameter that is not supported by AWS Bedrock,
causing all interactions to fail with a 400 error.

Error Message
API Error: 400 tools.0.custom.eager_input_streaming: Extra inputs are not permitted

Environment

• VS Code Version: 1.109.3
• Claude Code Extension Version: 2.1.72
• Operating System: macOS (Darwin 24.6.0)
• API Provider: AWS Bedrock (not direct Anthropic API)
• Model: claude-sonnet-4.6 from bedrock

What Should Happen?

Claude Code for VS Code (chat UI widget) should work with AWS Bedrock or gracefully disable features not supported by Bedrock.

Error Messages/Logs

API Error: 400 tools.0.custom.eager_input_streaming: Extra inputs are not permitted

Steps to Reproduce

1. Configure Claude Code to use AWS Bedrock endpoint
2. Attempt any interaction with Claude Code
3. Receive 400 error about eager_input_streaming

Claude Model

Other

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.72 (Claude Code)

Platform

AWS Bedrock

Operating System

macOS

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_