[Bug] Option+Backspace (delete word) not working in Ghostty terminal on macOS

Bug Description
Option+Backspace (delete previous word) doesn't work in Claude Code on macOS with Ghostty terminal, though it works fine in the terminal outside of Claude Code. Related to issues #5196 and #9219.

Environment Info

• Platform: darwin
• Terminal: ghostty
• Version: 2.1.7
• Feedback ID: 505d072a-d729-4471-bd05-3a1f565d6727

Errors

[{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/jeremy/.local/share/claude/versions/2.1.7 (expected in multi-process scenarios)\n    at ALR (/$bunfs/root/claude:3168:2157)\n    at eFA (/$bunfs/root/claude:3168:1268)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-01-14T14:22:13.512Z"}]