[Bug] Cowork mode bridge socket creation fails in SDK 2.1.111

Bug Description
Title: Cowork mode globally broken since 2.1.111 — "Failed to create bridge sockets after 5 attempts" Description: Every new cowork session fails on macOS, globally (all chats, new or resumed), since guest SDK was updated to 2.1.111 today at 19:22 local time. Environment: macOS 26.3 (Tahoe), arm64 (Apple Silicon) Claude Desktop: 1.3036.0 Host CLI claude: 2.1.111 (native, ~/.local/bin/claude) Guest VM SDK: 2.1.111 (at ~/Library/Application Support/Claude/claude-code-vm/2.1.111/claude) No npm/Homebrew installs, only native. Error in ~/Library/Logs/Claude/cowork_vm_node.log: [warn] [vm-stderr <id>] Error: Failed to create bridge sockets after 5 attempts [info] [Process:<id>] Exited, code=1, signal=null, duration=~1000-1600ms, oom=false Exits ~1s after Spawn succeeded, on every session. Timeline: First occurrence: 2026-04-16 19:23:05 (right after sdk_install completed pushed 2.1.111 to claude-code-vm/ at 19:22:46) Worked earlier same day (last successful sessions 12:52) 12+ consecutive failures across 1.5 hours. What I tried (none helped): Full Claude.app quit + restart rm -rf ~/Library/Application Support/Claude/claude-code-vm — re-downloaded same 2.1.111 binary, same failure Updated host CLI from 2.1.92 → 2.1.111 via claude install latest to match guest — same failure Verified only one claude install exists Fault isolation (host-side looks clean): cowork_vm_swift.log: VM boot → guest connected → CA certs installed → SDK installed → OAuth approved → Process spawned — all OK coworkd.log: user recovery (88 users), static IP assigned, RPC connected, ready event sent — all OK cowork_vm_node.log: Spawn succeeded in ~100-300ms then vm-stderr ... Failed to create bridge sockets within 1s The failure is 100% inside the guest-side claude binary at /usr/local/bin/claude inside the VM (= claude-code-vm/2.1.111/claude). Host infrastructure is fine. Looks like a regression in bridge socket creation logic in guest SDK 2.1.111. Host-side stdio MCP servers (~/Library/Logs/Claude/mcp-server-*.log) are all healthy — ruled out.

Environment Info

• Platform: darwin
• Terminal: Apple_Terminal
• Version: 2.1.111
• Feedback ID: 4459baaa-776d-43ae-8cd5-e50187849cf5

Errors

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