[BUG] Bedrock - Could not resolve authentication method

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?

I am using the latest Claude Code extension v2.0.29 in Cursor, with Amazon Bedrock provider. The GUI Claude Code cannot be logined, but the terminal version works fine.

What Should Happen?

It should behave like old v2.0.14 and correctly authenticate and work.

Error Messages/Logs

2025-10-30 16:17:14.546 [info] From claude: [ERROR] "Error: Error: Could not resolve authentication method. Expected either apiKey or authToken to be set. Or for one of the \"X-Api-Key\" or \"Authorization\" headers to be explicitly omitted\n    at uy.validateHeaders (file:///root/.cursor-server/extensions/anthropic.claude-code-2.0.29-universal/resources/claude-code/cli.js:357:930)\n    at uy.buildHeaders (file:///root/.cursor-server/extensions/anthropic.claude-code-2.0.29-universal/resources/claude-code/cli.js:357:8412)\n    at async uy.buildRequest (file:///root/.cursor-server/extensions/anthropic.claude-code-2.0.29-universal/resources/claude-code/cli.js:357:7470)\n    at async uy.makeRequest (file:///root/.cursor-server/extensions/anthropic.claude-code-2.0.29-universal/resources/claude-code/cli.js:357:3309)\n    at async FFA (file:///root/.cursor-server/extensions/anthropic.claude-code-2.0.29-universal/resources/claude-code/cli.js:1311:8767)\n    at async DzA (file:///root/.cursor-server/extensions/anthropic.claude-code-2.0.29-universal/resources/claude-code/cli.js:3345:1031)\n    at async xA1 (file:///root/.cursor-server/extensions/anthropic.claude-code-2.0.29-universal/resources/claude-code/cli.js:3345:1240)\n    at async Pb2 (file:///root/.cursor-server/extensions/anthropic.claude-code-2.0.29-universal/resources/claude-code/cli.js:3355:531)"

Steps to Reproduce

Put the env in the settings.json

"claudeCode.environmentVariables": [
{"name": "CLAUDE_CODE_USE_BEDROCK", "value": "1"},
{"name": "AWS_REGION", "value": "xxxxx"},
{"name": "AWS_ACCESS_KEY_ID", "value": "xxxxxxxxxxxxxxxxxxx"},
{"name": "AWS_SECRET_ACCESS_KEY", "value": "xxxxxxxx"}
]

i note that the old configuration key is "claude-code.environmentVariables", which is not recognized in the latest version and becomes "claudeCode.environmentVariables"

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

v2.0.14

Claude Code Version

v2.0.29

Platform

AWS Bedrock

Operating System

Windows

Terminal/Shell

Cursor

Additional Information

_No response_