[BUG] Native memory leak in Claude Code - 844GB/hour growth rate

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?

Environment:

• macOS 26.5.1 (25F80)
• Claude Desktop version: 1.10628.2
• Hardware: MacBook Pro 16" 2019, Intel i9, 32GB RAM

Issue:
Native memory leak causing extreme memory growth in Claude Code terminal.

Diagnostics from /heapdump:

• RSS: 0.30 GB (peak 0.30 GB)
• JS heap: 0.05 GB
• Unaccounted native memory: 0.21 GB
• Memory growth rate: 844,474 MB/hour
• Warning: "Native memory > heap - leak may be in native addons (node-pty, sharp, etc.)"

The leak is in native code, not JavaScript objects.

Reproducible: Yes, 100% of the time

4b99a546-7b3f-4b39-a672-27c83e06a387-diagnostics.json

4b99a546-7b3f-4b39-a672-27c83e06a387.heapsnapshot.zip

What Should Happen?

The memory should not bloat like this. I am not performing any task (on the desktop app), yet the memory already grew by 40MB in the last 2 minutes.

I have stored all relevant learnings from all sessions in all projects that were long and resource-intensive

Error Messages/Logs

Environment:
- macOS 26.5.1 (25F80)
- Claude Desktop version: 1.10628.2
- Hardware: MacBook Pro 16" 2019, Intel i9, 32GB RAM

Issue:
Native memory leak causing extreme memory growth in Claude Code terminal.

Diagnostics from /heapdump:
- RSS: 0.30 GB (peak 0.30 GB)
- JS heap: 0.05 GB
- Unaccounted native memory: 0.21 GB
- Memory growth rate: 844,474 MB/hour
- Warning: "Native memory > heap - leak may be in native addons (node-pty, sharp, etc.)"

The leak is in native code, not JavaScript objects.

Reproducible: Yes, 100% of the time

Steps to Reproduce

Environment:

• macOS 26.5.1 (25F80)
• Claude Desktop version: 1.10628.2
• Hardware: MacBook Pro 16" 2019, Intel i9, 32GB RAM

Issue:
Native memory leak causing extreme memory growth in Claude Code terminal.

Diagnostics from /heapdump:

• RSS: 0.30 GB (peak 0.30 GB)
• JS heap: 0.05 GB
• Unaccounted native memory: 0.21 GB
• Memory growth rate: 844,474 MB/hour
• Warning: "Native memory > heap - leak may be in native addons (node-pty, sharp, etc.)"

The leak is in native code, not JavaScript objects.

Reproducible: Yes, 100% of the time

Claude Model

Sonnet (default)

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

Claude 1.10628.2 (deee0a) 2026-06-03T20:08:36.000Z

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_