[BUG] Desktop App Code tab crashes immediately on macOS 15 Sequoia

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?

Desktop App Code tab crashes immediately on macOS 15 Sequoia
▎ - macOS: 15.x Sequoia (Darwin 24.6.0)
▎ - Desktop App: 1.5354.0 (latest, fresh install)
▎ - Error: "Claude Code process exited with code 1" — exits in 0s before any response
▎ - Affects all folders
▎ - Bundled binary (2.1.121) works fine when run directly; system CLI (2.1.126) works fine from terminal
▎ - Clean reinstall of app + support directory does not fix it

What Should Happen?

Desktop App should load Claude

Error Messages/Logs

Claude Code process exited with code 1

Steps to Reproduce

Reproduction steps:

1. Install Claude Desktop App 1.5354.0 on macOS 15 Sequoia (fresh install, no prior state)
2. Sign in with a Claude account
3. Click the Code tab
4. Click Select folder and choose any local git repository
5. Observe: "Claude Code process exited with code 1" error immediately — no session starts

Additional context:

• Occurs on every folder, not repo-specific
• Occurs even after full wipe of ~/Library/Application Support/Claude and reinstall
• Bundled binary (~/Library/Application Support/Claude/claude-code/2.1.121/claude.app/Contents/MacOS/claude) runs correctly when invoked directly from terminal
• System-installed claude CLI (2.1.126 via ~/.local/bin/claude) works correctly from terminal
• From ~/Library/Logs/Claude/main.log: binary is spawned with 7 MCP servers (Claude in Chrome, mcp-registry,

Claude Preview, ccd_session, ccd_directory, ccd_session_mgmt, scheduled-tasks) and exits in 0s with no output before the Desktop App logs the error

• No crash report generated in ~/Library/Logs/DiagnosticReports/ (clean exit, not a signal crash)

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.126 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_