VS Code extension v2.1.51 fails to activate on Windows: hardcoded Linux CI path in extension.js

[pgg3]

Bug Description

The Claude Code VS Code extension (v2.1.51, win32-x64) fails to activate on Windows due to a hardcoded Linux CI build path in extension.js.

Error

From exthost.log:

Activating extension Anthropic.claude-code failed due to an error:
TypeError: 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'
    at Object.<anonymous> (c:\Users\A\.vscode\extensions\anthropic.claude-code-2.1.51-win32-x64\extension.js:45:4602)

Impact

• All claude-vscode.* commands fail with "command not found" (e.g., claude-vscode.editor.openLast, claude-code.insertAtMentioned)
• The extension never activates, so no VS Code integration features work
• Claude Code CLI itself works fine

Environment

• OS: Windows 11 Pro 10.0.26200
• VS Code: 1.109.5 (x64)
• Extension: anthropic.claude-code v2.1.51 (win32-x64)
• Claude CLI: 2.1.51

Steps to Reproduce

1. Install Claude Code extension v2.1.51 on Windows
2. Open VS Code
3. Extension fails to activate silently
4. Any claude-vscode.* command shows "command not found"

Root Cause

The build artifact (extension.js line 45) contains a hardcoded file:///home/runner/work/claude-cli-internal/claude-cli-internal/build-agent-sdk/sdk.mjs path from the GitHub Actions CI runner environment. This path is invalid on Windows and causes a TypeError during activation.

Workaround

None found. Reinstalling does not help since the path is baked into the distributed extension bundle.

[github-actions]

Found 3 possible duplicate issues:

1. VS Code extension v2.1.51 fails to activate on Windows - hardcoded Linux CI paths in extension.js #28073
2. [BUG] VS Code extension fails to activate on Windows — hardcoded Linux path in extension.js #28056
3. [BUG] VS Code extension v2.1.51 fails to activate on Windows due to hardcoded Linux path #28072

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🤖 Generated with Claude Code

[bphr34k]

uninstall, close and reopen visual studio code, go back to market, and before installing, uncheck autoupdate, and then click gear and "install specific version" and go to the version before the update (2 days ago think it said). that seemed to work for me just now.

[LiamWiddop]

Can confirm answer by @bphr34k works. Installed v2.1.49

On 2.1.51, vs code logs show:

__workbench.desktop.main.js:sourcemap:568__ 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__'.

__notificationsAlerts.ts:40__ Error: command 'claude-vscode.editor.openLast' not found     at pit.n (__commandService.ts:95:26__)     at pit.executeCommand (__commandService.ts:89:15__)     at async Get.u (__actions.ts:199:3__)     at async Get.run (__actions.ts:190:4__)     at async $h.onClick (__menuEntryActionViewItem.ts:211:4__)

[bgbitblue]

I can confirm that returning to 2.1.49 works - I was mad because I thought I lost some long important conversations but after installing the 2.1.49 I can open them again.