[BUG] Claude VSCode Extension >2.0.7 Stuck Loading — Webview Sends Messages but Never Receives Responses

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?

Description

Since versions newer than 2.0.7 of the VSCode extension "Claude", prompts never return a response.
The UI stays in a loading state indefinitely.

The issue appears to be isolated to the VSCode webview communication layer.

Observed Behavior

• Prompts are successfully sent from the webview
• The extension remains stuck loading indefinitely
• No response is ever received back in the webview
• No visible error message in the UI

Additional Findings

• The CLI version works correctly in the terminal on the same machine and environment
• This suggests the issue is specific to the VSCode extension/webview layer rather than the backend or account

Environment

• VSCode: 1.109.0
• Node.js: v20.4.0
• Claude VSCode Extension: All versions > 2.0.7
• OS: macOS 26.1

Workaround

• Downgrading to version 2.0.7 restores normal functionality
• Using the CLI works without issues

What Should Happen?

Claude should return a response normally after submitting a prompt

Error Messages/Logs

Nothing more than :

"2026-02-06 11:01:27.948 [info] Received message from webview: {"type":"io_message","channelId":"XXX","message":{"type":"user","uuid":"XXX-XXX-XXX-XXX-XXX","session_id":"","parent_tool_use_id":null,"message":{"role":"user","content":[{"type":"text","text":"hello"}]}},"done":false}"

Steps to Reproduce

Any prompt submitted in the configuration mentionned above

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.0.7

Claude Code Version

2.1.33

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_