[BUG] High memory usage (~13-16 GB) when using Team/Teammate mode

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?

Claude Code process consumes ~13 GB of RAM when running a session with Teammate mode (multi-agent teams via TeamCreate / Task with team_name). Upon closing the session, memory usage spikes to ~16 GB before the process terminates.

What Should Happen?

Memory usage should remain reasonable (under 2-4 GB) even during multi-agent sessions, with proper cleanup of agent contexts when they go idle or shut down.

Error Messages/Logs

Steps to Reproduce

1. Start a Claude Code session
2. Create a team using TeamCreate and spawn multiple teammates via Task tool (I used just 3 teammates and teamlead)
3. Work with the team for a moderate session (~30-60 min)
4. Observe memory usage in Task Manager — it grows to ~13 GB
5. Close/exit the session — memory spikes to ~16 GB before process exits

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.34 (Claude Code)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

<img width="860" height="152" alt="Image" src="https://github.com/user-attachments/assets/15ebca8a-5631-4adc-9e45-94a0a8551b71" />

• Node.js version: v22.22.0
• RAM: 32 GB total
• Single-agent (non-team) sessions do not exhibit this level of memory usage
• The issue appears to be related to agent context accumulation — each teammate likely retains its full conversation history in memory without compaction or disposal