[BUG] Claude code extension memory leak issue

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?

Extension host crashes with this message when I open claude code extension chat window

<--- Last few GCs --->[15084:0x12400330000] 13838 ms: Mark-Compact (reduce) 2046.2 (2074.2) -> 2046.2 (2074.0) MB, pooled: 0.0 MB, 9.04 / 0.00 ms (+ 16.7 ms in 4 steps since start of marking, biggest step 5.1 ms, walltime since start of marking 27 ms) (average mu = 0.543, c[15084:0x12400330000] 13870 ms: Mark-Compact 2047.2 (2074.0) -> 2047.2 (2074.7) MB, pooled: 0.0 MB, 28.46 / 0.00 ms (average mu = 0.391, current mu = 0.101) allocation failure; scavenge might not succeed[15084:1128/155610.151820:ERROR:electron/shell/common/node_bindings.cc:178] OOM error in V8: Reached heap limit Allocation failed - JavaScript heap out of memory

xtension host (LocalProcess pid: 15084) terminated unexpectedly. Code: 5, Signal: unknown
zb @ abstractExtensionService.ts:843
zb @ nativeExtensionService.ts:160
yb @ abstractExtensionService.ts:835
(anonymous) @ abstractExtensionService.ts:808
C @ event.ts:1201
fire @ event.ts:1232
J @ localProcessExtensionHost.ts:530
(anonymous) @ localProcessExtensionHost.ts:289
C @ event.ts:1201
fire @ event.ts:1232
l @ ipc.ts:688
t @ ipc.ts:756
s @ ipc.ts:745
(anonymous) @ ipc.ts:547
C @ event.ts:1201
D @ event.ts:1212
fire @ event.ts:1236
ue @ event.ts:574
emit @ VM4 sandbox_bundle:2
onMessage @ VM4 sandbox_bundle:2
log.ts:460 ERR Extension host (LocalProcess pid: 15084) terminated unexpectedly. The following extensions were running: vscode.github-authentication, vscode.git-base, mhutchie.git-graph, vscode.npm, vscode.git, vscode.github, vscode.debug-auto-launch, vscode.merge-conflict, Anthropic.claude-code, vscode.emmet, vscode.terminal-suggest, vscode.configuration-editing, vscode.extension-editing, vscode.json-language-features, vscode.typescript-language-features

What Should Happen?

extension should run normally

Error Messages/Logs

Steps to Reproduce

1. Click the chat button (top right orange claude logo)
2. see the extension host crashing unexpectedly
3. open vscode dev tools and see the error messages about the crash

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.0.55

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

vscode:
Version: 1.106.3
Commit: bf9252a2fb45be6893dd8870c0bf37e2e1766d61
Date: 2025-11-25T22:28:18.024Z (2 days ago)
Electron: 37.7.0
ElectronBuildId: 12781156
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Darwin arm64 25.1.0

claude code extension:
Version
2.0.55
Last Updated
1 day ago