Bug: Teammates spawn but don't execute tasks

Bug Report: Teammates Don't Execute Tasks

Summary

When using the Teammate tool to spawn agents with the Task tool, the teammates are created in tmux panes but don't execute their assigned tasks. They remain at the initial Claude Code screen as if waiting for manual input.

Steps to Reproduce

1. Create a team using Teammate tool with operation: "spawnTeam"
2. Spawn teammates using Task tool with team_name and name parameters
3. Observe the tmux panes for the spawned teammates
4. Expected: Teammates autonomously work on their assigned tasks
5. Actual: Teammates sit idle at blank Claude Code prompt screen

Environment

• Claude Code CLI version: 2.1.32
• Date: 2026-02-06
• Platform: macOS (Darwin 25.2.0)
• Session: feature/gcp-migration branch

Example That Failed

// Created team
Teammate({ operation: "spawnTeam", team_name: "firebase-auth-migration" })

// Spawned three teammates
Task({ 
  subagent_type: "general-purpose",
  team_name: "firebase-auth-migration",
  name: "cleanup-agent",
  prompt: "...detailed task instructions..."
})

Result: Agents created in tmux panes %14, %15, %16 but never executed prompts.

Expected Behavior

Teammates should autonomously read their prompts and begin executing tasks without manual intervention.

Actual Behavior

Teammates spawn in new tmux panes but display only the initial Claude Code interface, appearing to wait for user input rather than executing their assigned prompts.

Impact

• Cannot use parallel teammate execution for complex tasks
• Have to fall back to sequential Task agent dispatching
• Reduces efficiency of multi-agent workflows

Workaround Used

Used individual Task agents without the team system, which worked correctly for parallel execution.