[BUG] auto compaction become silence

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?

on Opus 4.6, Claude code on CLI (webstorm terminal).
on session it was a built-in feature that when context reached to 65% a short message line appeared on the right bottom of the screen stating "context left until auto-compact: 10%" and it would keep counting down as the conversation continued . when it reached 0%, the conversation got stopped and "auto compacting conversation" showed , after it was done, a new start up message appeared and main agent continued the
last task without historical context.now it seems like auto compaction happen in the background were i don't even notice it happened.

• Previous behavior: visible "context left until auto-compact: XX%" indicator at bottom right, compaction was visible and paused the conversation

• Current behavior: no indicator, possible silent compaction without notification
• Impact: loss of conversation detail mid-session, model appears to "forget" recent corrections

What Should Happen?

showing an indication for the usage left until compact that i will be able to save mid-session context and decision before it get lost on compaction

Error Messages/Logs

Steps to Reproduce

1. start new session
2. reach the context limit
3. keep writing prompts and ask main agents to do some tasks
4. see that the "context left until auto-compact: XX% not showing
5. conversation gets compacted in the background without any notice that happened

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

V2.1.70

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

IntelliJ IDEA terminal

Additional Information

_No response_