Context repeatedly exhausts to ~10% after auto-compact in v2.0.25

Title: Context repeatedly exhausts to ~10% after auto-compact in v2.0.25

Description:
Since Claude Code v2.0.25, auto-compact mechanism appears broken - after each auto-compact, only ~10% of context remains available, making continued work impossible.

Steps to reproduce:

1. Start any session with normal work
2. Let it run until auto-compact triggers
3. After resume, observe context already at ~90% used
4. Continue work briefly until next auto-compact
5. Pattern repeats cyclically

Expected: Auto-compact should free up significant context (60-80% available)
Actual: Only ~10% context available after compact, session becomes unusable

Workaround attempts:

• Restarting session sometimes helps temporarily
• Problem often recurs after very first auto-compact in new session

Impact: Makes any extended work session impossible in v2.0.25
Regression: This worked correctly in pre-v2.0.25 versions

Environment:

• Claude Code v2.0.25
• Occurs consistently across different project types
• Not related to specific file types or operations