Agent/CCD sessions crash with "Failed to create bridge sockets after 5 attempts" on 2.1.111

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?

> Claude desktop 1.3036.0, Claude Code VM SDK 2.1.111 (macOS ARM > All local agent sessions crash ~1s after spawn with Failed to create bridge sockets after 5 attempts, exit code 1. Worked on 2.1.101 (April 14). Broke on 2.1.111 (April 16). Fresh re-download of the VM SDK reproduces. Happens across all agent folders, with ~11 plugins loaded and 20 virtio-fs mounts. Non-agent sessions on the same 2.1.111 build work fine — the bug is in the VM bridge path.
> Log: ~/Library/Logs/Claude/cowork_vm_node.log

What Should Happen?

The agents should work

Error Messages/Logs

Steps to Reproduce

Environment

• macOS (Apple Silicon)
• Claude desktop app: 1.3036.0
• Claude Code SDK (VM): 2.1.111
• Previously working: 2.1.101 (April 14, 2026)
• Broken since: 2.1.111 auto-installed (April 16, 2026)

Steps to Reproduce

1. Open the Claude desktop app.
2. Start any local agent-mode session (folder-based agent / Cowork CCD session) — e.g., open a folder with a CLAUDE.md and begin a session scoped to it.
3. Send any message (or just let the session initialize).

Expected

Agent session initializes and responds.

Actual

Within ~1 second of spawn, the VM-side claude process exits with code 1. The desktop app surfaces:

"Claude Code process exited with code 1. You can restart the conversation from an earlier message."

~/Library/Logs/Claude/cowork_vm_node.log shows:

[Spawn:vm] id=<uuid> Spawn succeeded in ~70ms
[vm-stderr <uuid>] Error: Failed to create bridge sockets after 5 attempts
[Process:<uuid>] Exited, code=1, signal=null, duration=~1000ms, oom=false

Scope

• Reproduces on every agent session attempt (6+ consecutive failures logged today).
• Reproduces after fully deleting ~/Library/Application Support/Claude/claude-code-vm/2.1.111 and ~/Library/Application Support/Claude/claude-code/2.1.111 to force a fresh download — so it's not a corrupted binary.
• Non-agent Claude Code sessions on the same 2.1.111 build work fine. The bug is specific to the VM/bridge path used by Cowork agent sessions.
• 11 remote plugins loaded, 20 virtio-fs mounts on the spawn command.

Workaround

None found. Downgrading to 2.1.101 not possible (binary not cached).

Attached log

~/Library/Logs/Claude/cowork_vm_node.log (see excerpt above; full file available)

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.111

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_