[MODEL] Opus 4.5

Preflight Checklist

• [x] I have searched existing issues for similar behavior reports
• [x] This report does NOT contain sensitive information (API keys, passwords, etc.)

Type of Behavior Issue

Other unexpected behavior

What You Asked Claude to Do

I asked claude to complete a sprint from the project punchlist.

What Claude Actually Did

Outstanding job with maintaining context and state through multiple context compaction windows.

the main agent is able to send subagent into the background to work on a long running task. Those tasks consume multiple main context windows and the main window is able to continue to track and update the sub agents through in this case 8 windows.

I think in the end after that many compactions the context in the main window has grown to large for further compaction.

It was still a great run

Expected Behavior

Maybe pruning the compaction context, so it never fills. Sometime you don't need infinite context just what you are working on now.

Files Affected

Permission Mode

Accept Edits was ON (auto-accepting changes)

Can You Reproduce This?

Yes, every time with the same prompt

Steps to Reproduce

Just give a long running looping task and for me after 8 compactions, the subagent run out of context, so much so the main window can no longer compact.

Claude Model

Opus

Relevant Conversation

Impact

Low - Minor inconvenience

Claude Code Version

Claude Code v2.0.76

Platform

Anthropic API

Additional Context

_No response_