[BUG]

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?

Activating extension 'Anthropic.claude-code' failed: The argument 'filename' must be a file URL object, file URL string, or absolute path string. Received 'file:///home/runner/work/claude-cli-internal/claude-cli-internal/build-agent-sdk/sdk.mjs'.
$onExtensionActivationError @ workbench.desktop.main.js:sourcemap:1031
workbench.desktop.main.js:sourcemap:4909 Error: command 'claude-vscode.editor.openLast' not found
at Aet._tryExecuteCommand (workbench.desktop.main.js:sourcemap:1810:4832)
at Aet.executeCommand (workbench.desktop.main.js:sourcemap:1810:4732)
at async Vee.runAction (workbench.desktop.main.js:sourcemap:411:30833)
at async Vee.run (workbench.desktop.main.js:sourcemap:411:30733)
at async Sl.onClick (workbench.desktop.main.js:sourcemap:852:124673)

<img width="1540" height="854" alt="Image" src="https://github.com/user-attachments/assets/6e3c8df5-13f2-4c5d-9f58-093d8c64c784" />

What Should Happen?

not able to open claude sidebar and commands are not working

Error Messages/Logs

Steps to Reproduce

not able to click on new session for extension

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.129

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_