[BUG] Context window limit at 14% persists in 2.1.143 (regression of #49593)

Problem

Context window limit at 14% (140k/1000k tokens). Session terminates with "The model has reached its context window limit" error.

Versions affected (all tested)

• 2.1.190 (latest) ❌
• 2.1.187 ❌
• 2.1.179 (stable) ❌
• 2.1.143 ❌
• 2.1.119 ❌

Per #49593, this appeared in 2.1.111. The supposed fix in 2.1.116 does NOT work.

Environment

• OS: Linux 6.14.0-37-generic
• Model: opus (1000k token limit)

Reproduction

Identical across all versions:

1. Fresh Claude session
2. Execute 20+ commands
3. Watch context reach ~14%
4. Session dies immediately

Timeline

• Before 2.1.111: Unknown (need to test)
• 2.1.111: Issue #49593 reports 14% bloat appeared
• 2.1.116: Supposedly fixed (doesn't work)
• 2.1.119 → 2.1.190: All affected

Next step

Testing 2.1.110 (last version before 2.1.111) to confirm if that's the last working version.

Workarounds (none fix the root cause)

• .claudeignore for large directories
• Capped PROMPT_GENERATOR
• Brief prompts
• Frequent session restarts

Questions for Anthropic

1. Can you confirm 2.1.110 or earlier doesn't have this issue?
2. What's the actual fix timeline?
3. Is this getting priority attention?