### Preflight Checklist - [x] I have searched [existing issues](https://github.com/anthropics/claude-code/issues?q=is%3Aissue%20state%3Aopen%20label%3Abug) 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? The build has a hardcoded Linux path (file:///home/runner/work/claude-cli-internal/...) baked into extension.js that crashes createRequire on Windows. ##

[BUG] The build 2.1.51 has a hardcoded Linux path (file:///home/runner/work/claude-cli-internal/...) baked into extension.js that crashes createRequire on Windows.

Status Fixed / completed

Reported on v2.1.51

Maintainer reply None cached

Activity 4 comments · opened Feb 24, 2026 · closed Feb 24, 2026

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?

The build has a hardcoded Linux path (file:///home/runner/work/claude-cli-internal/...) baked into extension.js that crashes createRequire on Windows.

What Should Happen?

The Claude Code VS Code extension (v2.1.51, win32-x64) should activate successfully on Windows. Instead, it fails with:
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'
The extension's extension.js (line 45) contains a hardcoded Linux CI build path that causes Module.createRequire to fail on Windows. The path file:///home/runner/work/... is a GitHub Actions runner path baked into the build artifact, which is invalid on Windows.
Expected: The extension should activate normally and register all commands including claude-vscode.editor.openLast.
Additional context:

OS: Windows 11
VS Code version: (add yours)
Extension version: 2.1.51 (win32-x64)
CLI version: 2.1.51
The vsix file is also missing from the npm package's vendor/ directory
/ide command throws onInstall is not defined
Clean reinstall from marketplace installs the same broken version

Error Messages/Logs

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'

2026-02-24 09:28:18.577 [info] ExtensionService#_doActivateExtension Anthropic.claude-code, startup: false, activationEvent: 'onWalkthrough:claude-code-walkthrough'
2026-02-24 09:28:18.728 [error] Activating extension Anthropic.claude-code failed due to an error:
2026-02-24 09:28:18.728 [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 Module.createRequire (node:internal/modules/cjs/loader:1915:13)
	at Object.<anonymous> (c:\Users\Onkar\.vscode\extensions\anthropic.claude-code-2.1.51-win32-x64\extension.js:45:4602)
	at Module._compile (node:internal/modules/cjs/loader:1714:14)
	at Module._extensions..js (node:internal/modules/cjs/loader:1848:10)
	at Module.load (node:internal/modules/cjs/loader:1448:32)
	at Module._load (node:internal/modules/cjs/loader:1270:12)

Steps to Reproduce

Steps to reproduce:

Install Claude Code CLI via npm on Windows:

npm install -g @anthropic-ai/claude-code@latest
CLI version installed: 2.1.51

Install the VS Code extension:

code --install-extension anthropic.claude-code
Extension version installed: 2.1.51 (win32-x64)

Open VS Code and observe:

Extension shows as "Activating" indefinitely in Developer: Show Running Extensions
No "Claude Code" output channel appears in Output panel
Command claude-vscode.editor.openLast not found in Command Palette

Check Extension Host log (Output → Extension Host):

Extension activation fails with createRequire TypeError referencing Linux CI path

Additional reproduction:

Run claude /ide in terminal → crashes with onInstall is not defined
Check %APPDATA%\npm\node_modules\@anthropic-ai\claude-code\vendor\ → claude-code.vsix file is completely missing, only ripgrep/ folder exists
Uninstalling and reinstalling both CLI and extension reproduces the same error

Environment:

OS: Windows 11
VS Code: (add your version — check Help → About)
Node.js: (add output of node --version)
Claude Code CLI: 2.1.51
Extension: anthropic.claude-code-2.1.51-win32-x64

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.1.50

Claude Code Version

2.1.51

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_

View original on GitHub ↗

4 Comments

github-actions[bot] · 7 months ago

Found 3 possible duplicate issues:

This issue will be automatically closed as a duplicate in 3 days.

If your issue is a duplicate, please close it and 👍 the existing issue instead
To prevent auto-closure, add a comment or 👎 this comment

🤖 Generated with Claude Code

StealUrKill · 7 months ago

Used Claude to Fix Claude, works great.

PS C:\Users\HSS> powershell.exe -ExecutionPolicy Bypass -File .\fix-claude-code-extension.ps1 Found 1 Claude Code extension(s): [anthropic.claude-code-2.1.51-win32-x64] Found 2 occurrence(s) of the bad CI path. Patching... [anthropic.claude-code-2.1.51-win32-x64] Backup saved -> extension.js.bak [anthropic.claude-code-2.1.51-win32-x64] Fix 1 (createRequire): replaced 1 occurrence(s) [anthropic.claude-code-2.1.51-win32-x64] Fix 2 (path resolver): replaced 1 occurrence(s) [anthropic.claude-code-2.1.51-win32-x64] Patched successfully Done. Reload VSCode to apply: Ctrl+Shift+P -> 'Developer: Reload Window'

```# fix-claude-code-extension.ps1
#

Fixes Claude Code VSCode extension activation failure on Windows.

Error:

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/...'

Root cause:

The extension bundle contains two hardcoded Linux CI build paths

(file:///home/runner/work/...). On Windows, Node.js rejects these

URLs in fileURLToPath() because they have no Windows drive letter.

This crashes the extension immediately at activation.

What this script patches:

Fix 1 - createRequire call: crashes at activation time

.createRequire("file:///home/runner/.../sdk.mjs")

-> .createRequire(__filename) (use actual file path instead)

Fix 2 - path resolution call: crashes when agent SDK is invoked

SomeFunc("file:///home/runner/.../sdk.mjs")

-> inline child_process lookup for the claude CLI on PATH

Usage:

Right-click -> "Run with PowerShell"

OR from a PowerShell prompt: .\fix-claude-code-extension.ps1

$ErrorActionPreference = "Stop"

$extensionRoot = "$env:USERPROFILE\.vscode\extensions"
$badUrl = 'file:///home/runner/work/claude-cli-internal/claude-cli-internal/build-agent-sdk/sdk.mjs'

---- Regex patterns (stable across minified versions) ----

Fix 1: .createRequire("file:///home/...sdk.mjs")

The method name createRequire is stable even in minified code.

$pattern1 = '\.createRequire$"file:///home/runner/work/claude-cli-internal/claude-cli-internal/build-agent-sdk/sdk\.mjs"$'
$replacement1 = '.createRequire(__filename)'

Fix 2: anyMinifiedName("file:///home/...sdk.mjs")

After fix 1 removes the createRequire case, any remaining call

with this URL is the fileURLToPath wrapper (Ye or similar).

Replace it with an inline lookup that finds the claude CLI on PATH.

$pattern2 = '[a-zA-Z_$][a-zA-Z0-9_$]*$"file:///home/runner/work/claude-cli-internal/claude-cli-internal/build-agent-sdk/sdk\.mjs"$'
$replacement2 = '(function(){try{return(require("child_process").spawnSync(process.platform==="win32"?"where.exe":"which",["claude"],{encoding:"utf8"}).stdout||"").split(/[\r\n]+/).filter(Boolean)[0]}catch(e){}})()'

---- Find extension directories ----

if (-not (Test-Path $extensionRoot)) {
Write-Host "VSCode extensions directory not found: $extensionRoot" -ForegroundColor Red
exit 1
}

$dirs = Get-ChildItem $extensionRoot -Directory | Where-Object { $_.Name -like 'anthropic.claude-code-*' }

if ($dirs.Count -eq 0) {
Write-Host "No Claude Code extension found in: $extensionRoot" -ForegroundColor Yellow
exit 1
}

Write-Host "Found $($dirs.Count) Claude Code extension(s):`n"

foreach ($dir in $dirs) {
$label = $dir.Name
$file = Join-Path $dir.FullName 'extension.js'

if (-not (Test-Path $file)) {
Write-Host "[$label] extension.js not found, skipping" -ForegroundColor Yellow
continue
}

$content = [System.IO.File]::ReadAllText($file, [System.Text.Encoding]::UTF8)

if ($content.IndexOf($badUrl) -lt 0) {
Write-Host "[$label] Not affected (bad URL not found) - already patched or different version" -ForegroundColor Green
continue
}

# Count occurrences before patching
$count = ([regex]::Matches($content, [regex]::Escape($badUrl))).Count
Write-Host "[$label] Found $count occurrence(s) of the bad CI path. Patching..." -ForegroundColor Cyan

# Backup original
$backup = "$file.bak"
Copy-Item $file $backup
Write-Host "[$label] Backup saved -> extension.js.bak"

# Apply Fix 1: createRequire
$patched = [regex]::Replace($content, $pattern1, $replacement1)
$fix1count = $count - ([regex]::Matches($patched, [regex]::Escape($badUrl))).Count
Write-Host "[$label] Fix 1 (createRequire): replaced $fix1count occurrence(s)"

# Apply Fix 2: fileURLToPath wrapper
$patched2 = [regex]::Replace($patched, $pattern2, $replacement2)
$fix2count = ([regex]::Matches($patched, [regex]::Escape($badUrl))).Count `

([regex]::Matches($patched2, [regex]::Escape($badUrl))).Count

Write-Host "[$label] Fix 2 (path resolver): replaced $fix2count occurrence(s)"

# Verify no bad URLs remain
$remaining = ([regex]::Matches($patched2, [regex]::Escape($badUrl))).Count
if ($remaining -gt 0) {
Write-Host "[$label] WARNING: $remaining occurrence(s) still remain after patching!" -ForegroundColor Yellow
}

# Write patched file
[System.IO.File]::WriteAllText($file, $patched2, [System.Text.Encoding]::UTF8)
Write-Host "[$label] Patched successfully" -ForegroundColor Green
Write-Host ""
}

Write-Host "Done. Reload VSCode to apply: Ctrl+Shift+P -> 'Developer: Reload Window'" -ForegroundColor White

shawnm-anthropic · 7 months ago

Hi, sorry about the disruption. We just published v2.1.52 which should hopefully work better.