Agent Teams: teammate stats always show 0 tool uses / 0 tokens

Bug

Agent Teams teammates always display 0 tool uses · 0 tokens in the lead's status line, even though teammates are actively working and returning results.

╒═ team-lead · shift + ↑/↓ to select
├─ @code-reviewer: Working… · 0 tool uses · 0 tokens
├─ @skill-checker: Working… · 0 tool uses · 0 tokens
└─ @skill-servicemap: Working… · 0 tool uses · 0 tokens

Repro

1. Enable Agent Teams (CLAUDE_CODE_EXPERIMENTAL_AGENT_TEAMS=1)
2. Start a team with teammates
3. Teammates begin working (visible in their tmux panes — reading files, running tools)
4. Lead's status bar shows 0 tool uses · 0 tokens for all teammates permanently

Expected

Stats should update as teammates use tools and consume tokens.

Environment

• Claude Code 2.1.89
• Ubuntu 24.04 (Docker container)
• TERM=xterm-256color
• tmux backend for teammates
• --dangerously-skip-permissions

Notes

• Tested with TERM=dumb and TERM=xterm-256color — same result
• Teammates work correctly and return results to lead
• Only the stats display is broken