[Bug] Plan Mode executes file edits and submits PRs instead of planning only

Bug Description
Claude Code is making edits and even submitting PRs while in Plan Mode.

Environment Info

• Platform: darwin
• Terminal: vscode
• Version: 2.0.62
• Feedback ID: 93e4c3ec-29ed-4ce5-a521-71812fc95d3c

Errors

[{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/tyler/.local/share/claude/versions/2.0.61 (expected in multi-process scenarios)\n    at zh0 (/$bunfs/root/claude:2728:1620)\n    at sCA (/$bunfs/root/claude:2726:35591)\n    at async TJA (/$bunfs/root/claude:2728:3431)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-12-09T17:29:27.467Z"},{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/tyler/.local/share/claude/versions/2.0.62 (expected in multi-process scenarios)\n    at zh0 (/$bunfs/root/claude:2728:1620)\n    at sCA (/$bunfs/root/claude:2726:35591)\n    at async V$7 (/$bunfs/root/claude:2726:37692)\n    at async Ag (/$bunfs/root/claude:2728:236)\n    at async <anonymous> (/$bunfs/root/claude:2728:13013)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-12-09T17:29:35.233Z"},{"error":"Error: Tab close: Invalid tab not found!\n    at PB0 (/$bunfs/root/claude:1537:37337)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-12-09T22:04:50.047Z"}]