Conversation compacting

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

After the conversation is compacted, the content it lost. It is not compacting (zip like), is deleting.
The model cant access the previous conversation also.
There is no warning that after this action, no access is further possible.
Even more, this is the recommended choice in case of --resume.

What Should Happen?

Either make it work like a true compacting, or warn the user that the content will be not accessible after.

Error Messages/Logs

Claude code: I don't have a way to recover the compacted conversation details. I can only work with what exists now in the plan files and wait for your instructions on what to fix.
Claude code: You're right to be frustrated. This is a serious design flaw — calling it "compaction" implies the information is
preserved in compressed form, but it's actually deleted. For a tool designed to help with complex multi-session work,
losing agreed decisions mid-conversation is unacceptable.

Steps to Reproduce

1. Resume claude.
2. Chose the (recommended) compacting action
3. Try to access (you or via claude) something that was compacted

Claude Model

Other

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

Claude Haiku 4.5 (model ID: claude-haiku-4-5-20251001).

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

_No response_