[BUG] VSCode extension 2.0.0 doesn't allow using Bedrock token

I am seeing this as well on my Mac - it opens the standard AWS SSO but any chat gets stuck:

<img width="797" height="149" alt="Image" src="https://github.com/user-attachments/assets/252c492c-dba0-4876-8bc0-45b155a601c4" />

Also getting the same JSON error

<img width="1508" height="422" alt="Image" src="https://github.com/user-attachments/assets/87f62db2-92d6-4d98-bf65-4f9610d6f129" />

Well I don't see this token error. I just can't login, I want to use the token but it asks to login.

On a related note, it does not seem to respect the settings.json completely. It does detect the model I set there, but it does not seem to use Bedrock even though my file contains "CLAUDE_CODE_USE_BEDROCK": "1". I also don't think it is executing the script in awsCredentialExport.

These are working good with Claude Code from the terminal, on the same machine with the same settings.

Have the same issue, unable to login. Tried setting up the environment variables in VSCode settings, didn't work either:

"claude-code.environmentVariables": [
    "CLAUDE_CODE_USE_BEDROCK=1",
  ]

Works well in terminal, just the extension wants either Anthropic or Claude subscription.

<img width="643" height="558" alt="Image" src="https://github.com/user-attachments/assets/10a34834-3ace-483d-a21f-724e89759f2c" />

It's broken.

{
    "claude-code.selectedModel": "arn:aws:bedrock:eu-west-1:[censored]:inference-profile/global.anthropic.claude-sonnet-4-5-20250929-v1:0",
    "claude-code.environmentVariables": [
        {
            "name": "CLAUDE_CODE_USE_BEDROCK",
            "value": "1"
        },
    ],
}

Find your arn here:

aws bedrock list-inference-profiles

This one works for me, I'm using Bedrock with profile login. It seems the extension doesn't respect the CLAUDE_CODE_USE_BEDROCK env var from ~/.claude/settings.json

Also getting the same JSON error <img alt="Image" width="1508" height="422" src="https://private-user-images.githubusercontent.com/643153/495349643-87f62db2-92d6-4d98-bf65-4f9610d6f129.png?jwt=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpc3MiOiJnaXRodWIuY29tIiwiYXVkIjoicmF3LmdpdGh1YnVzZXJjb250ZW50LmNvbSIsImtleSI6ImtleTUiLCJleHAiOjE3NTkyMjUyMzYsIm5iZiI6MTc1OTIyNDkzNiwicGF0aCI6Ii82NDMxNTMvNDk1MzQ5NjQzLTg3ZjYyZGIyLTkyZDYtNGQ5OC1iZjY1LTRmOTYxMGQ2ZjEyOS5wbmc_WC1BbXotQWxnb3JpdGhtPUFXUzQtSE1BQy1TSEEyNTYmWC1BbXotQ3JlZGVudGlhbD1BS0lBVkNPRFlMU0E1M1BRSzRaQSUyRjIwMjUwOTMwJTJGdXMtZWFzdC0xJTJGczMlMkZhd3M0X3JlcXVlc3QmWC1BbXotRGF0ZT0yMDI1MDkzMFQwOTM1MzZaJlgtQW16LUV4cGlyZXM9MzAwJlgtQW16LVNpZ25hdHVyZT1mOGQ0NWQxNDg2MjIyN2IxNTU5NTc3MGZlYTk3YTExNjNjNTZkZGYzOGZjNGNiZGZlMzA5ZWMwYjlhNWQ3ZjhhJlgtQW16LVNpZ25lZEhlYWRlcnM9aG9zdCJ9.tOC9-AzJjY8aslxsKyju3Z-6CsL58Q4c8tg2Ps9dxIs">

I got the same error when I have "awsAuthRefresh" command, but disabling it then I manually login and it could work.

@vuon9 you are a genius, thank you, confirmed it works for me!

Thanks for the reports (and the excellent investigation, @vuon9!) !

We've added documentation on how to use the new native VSCode extension with vertex and bedrock (and we're working on linking to it from the login page as well):
https://docs.claude.com/en/docs/claude-code/vs-code#using-third-party-providers-vertex-and-bedrock

@hackyon-anthropic thank you for the update.
So it is only environment variables ? awsCredentialExport and awsAuthRefresh are not supported ? In my company we need this refresh script because we have some additional authentication to take care of

Think it could be that the anthropic_small_fast_model using Haiku for the auth refresh is not supported in the extension if people are still using that. It still works in the CLI, but the docs recommend using the anthropic_default_haiku_model env var as the small_fast_model is deprecated. If you use the anthropic_default_haiku_model var, the extension and awsAuthRefresh works . Check https://docs.claude.com/en/docs/claude-code/model-config#environment-variables

Think it could be that the anthropic_small_fast_model using Haiku for the auth refresh is not supported in the extension if people are still using that. It still works in the CLI, but the docs recommend using the anthropic_default_haiku_model env var as the small_fast_model is deprecated. If you use the anthropic_default_haiku_model var, the extension and awsAuthRefresh works . Check https://docs.claude.com/en/docs/claude-code/model-config#environment-variables

I just tested, and it doesn't work like that. Still forces me to login.

<img width="1905" height="339" alt="Image" src="https://github.com/user-attachments/assets/6157cea6-66a4-461a-aafb-e65356f1f15f" />

Here's a part of log output

2025-10-01 11:11:54.357 [info] Received message from webview: {"type":"request","requestId":"xxx","request":{"type":"rename_tab","title":"hey?"}}
2025-10-01 11:11:54.364 [info] Received message from webview: {"type":"io_message","channelId":"xxx","message":{"type":"user","session_id":"","parent_tool_use_id":null,"message":{"role":"user","content":[{"type":"text","text":"hey?"}]}},"done":false}
2025-10-01 11:11:54.388 [info] Received message from webview: {"type":"request","requestId":"xxx","request":{"type":"rename_tab","title":"hey?"}}
2025-10-01 11:11:54.412 [info] Closing Claude on channel: xxx
2025-10-01 11:11:54.412 [error] Error from Claude (on channel xxx): SyntaxError: Unexpected token 'A', "Attempting"... is not valid JSON

what if you remove both the SMALL_FAST_MODEL and the SMALL_FAST_MODEL_AWS_REGION entirely, and just keep the Haiku? Because that works for me when I just have the DEFAULT_HAIKU_MODEL, DEFAULT_SONNET_MODEL, and DEFAULT_OPUS_MODEL. And when i add the SMALL_FAST_MODEL it gives me that error.
[edit: scratch that, i thought i reproduced the error by adding small_fast model var but wasnt that. I was able to get it to work with those default model vars and with the awsAuthRefresh.]

Ok was able to narrow it further with that. I tried removing the default_sonnet var and just kept the default_haiku but it was hanging after hitting the prompt, while not showing that error. It does retrieve the aws credentials successfully. But works once i added both, so my guess is it needs a default haiku and sonnet at the least in your .claude/settings.json if you don't specify it in your vscode settings

> Think it could be that the anthropic_small_fast_model using Haiku for the auth refresh is not supported in the extension if people are still using that. It still works in the CLI, but the docs recommend using the anthropic_default_haiku_model env var as the small_fast_model is deprecated. If you use the anthropic_default_haiku_model var, the extension and awsAuthRefresh works . Check https://docs.claude.com/en/docs/claude-code/model-config#environment-variables I just tested, and it doesn't work like that. Still forces me to login. <img alt="Image" width="1905" height="339" src="https://private-user-images.githubusercontent.com/3168632/495987214-6157cea6-66a4-461a-aafb-e65356f1f15f.png?jwt=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.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.K4cOhO5ZLowZhLhZvx0dkTQ3AHZYKkDT9pu-oHiLAmQ"> Here's a part of log output `` 2025-10-01 11:11:54.357 [info] Received message from webview: {"type":"request","requestId":"xxx","request":{"type":"rename_tab","title":"hey?"}} 2025-10-01 11:11:54.364 [info] Received message from webview: {"type":"io_message","channelId":"xxx","message":{"type":"user","session_id":"","parent_tool_use_id":null,"message":{"role":"user","content":[{"type":"text","text":"hey?"}]}},"done":false} 2025-10-01 11:11:54.388 [info] Received message from webview: {"type":"request","requestId":"xxx","request":{"type":"rename_tab","title":"hey?"}} 2025-10-01 11:11:54.412 [info] Closing Claude on channel: xxx 2025-10-01 11:11:54.412 [error] Error from Claude (on channel xxx): SyntaxError: Unexpected token 'A', "Attempting"... is not valid JSON ``

@hackyon-anthropic

There is an issue where the extension ignores ANTHROPIC_BASE_URL and ANTHROPIC_AUTH_TOKEN and force you to either login or use API (not using Bedrock or Vertex). But this does not happen when using CC CLI.

e.g. this runs fine:

``ANTHROPIC_BASE_URL=my_url ANTHROPIC_AUTH_TOKEN=my_token npx @anthropic-ai/claude-code@latest``

But setting those in the shell env and/or extension env claude-code.environmentVariables does not work.

The extension asks me to log in through Claude or Anthropic. It works via terminal.

Is this going to be fixed? @hackyon-anthropic

<img width="576" height="184" alt="Image" src="https://github.com/user-attachments/assets/314282e4-9218-4f47-bc6e-589c45df6e57" />
<img width="672" height="787" alt="Image" src="https://github.com/user-attachments/assets/cf824919-31ec-4b2d-a207-e5b85281e6e0" />

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