[BUG] Rejecting a plan now causes a chat rollback

Environment

• Platform (select one):
• [x] Anthropic API
• [ ] AWS Bedrock
• [ ] Google Vertex AI
• [ ] Other: <!-- specify -->
• Claude CLI version: 1.0.48 (Claude Code)
• Operating System: macOS 15.5 (24F74)
• Terminal: Terminal App

Bug Description

Rejecting a plan with "No, keep planning" now causes a rollback and removes at least the full contents of the plan. This now prevents iterating on a plan. It seems Claude forgets the plan.

Steps to Reproduce

1. Turn on plan mode
2. prompt until a plan is created
3. Reject the plan

Expected Behavior

The rejected plan continues as part of the chat history, allowing iteration on the plan.

Actual Behavior

The plan is rolled back, deleted from view, and not in Claude's memory.

Additional Context

Iterating on a plan is an important part of my workflow. I need a way to tell Claude that I want to continue, but with certain changes. Before, I was able to keep prompting and new plans would be presented until one was accepted. Now, this is completely broken.