SDK 2.1.111 regression: Failed to create bridge sockets after 5 attempts (Cowork broken)

Bug Report

Summary

Cowork sessions crash immediately on every attempt after the SDK auto-updated from 2.1.92 → 2.1.111 today. Was working fine this morning on 2.1.92.

Error

Error: Failed to create bridge sockets after 5 attempts
Process exited, code=1, signal=null, duration=~820ms, oom=false

Timeline (from logs)

• Before 1pm today (2026-04-16): Sessions running normally on SDK 2.1.92
• ~1pm today: SDK auto-updated to 2.1.111
• Immediately after: Every single Cowork session fails within ~820ms with bridge socket error
• No sessions have succeeded since the update

Environment

• Claude Desktop: 1.569.0
• SDK before update: 2.1.92 (working)
• SDK after update: 2.1.111 (broken)
• macOS: 26.3.1 (a), Darwin 25.3.0, arm64 (Apple M4 Pro)
• VM Bundle: 5680b11bcdab215cccf07e0c0bd1bd9213b0c25d

Log evidence

2026-04-16 09:12:50 [info] [postConnect] Installing SDK: version=2.1.92   ← working
2026-04-16 13:06:24 [info] [postConnect] Installing SDK: version=2.1.111  ← update happens
2026-04-16 13:12:50 [warn] [vm-stderr] Error: Failed to create bridge sockets after 5 attempts  ← immediate failure

Every spawn attempt since 2.1.111 installed has failed with the same error. Rollback to 2.1.92 needed urgently.