claude agents shows registry instead of session dashboard inside cmux terminal multiplexer

Summary

claude agents shows the agent type registry instead of the interactive session dashboard TUI when run in Ghostty terminal.

Environment

• Claude Code version: 2.1.139
• OS: macOS (Darwin 25.4.0)
• $TERM: xterm-256color (same across all terminals)

Reproduction

1. Run claude agents in Ghostty (TERM_PROGRAM=ghostty)
2. Observe: prints a static list of agent types (plugin agents, built-in agents) instead of the interactive session dashboard

7 active agents

Plugin agents:
  superpowers:code-reviewer · inherit

Built-in agents:
  claude · inherit
  claude-code-guide · haiku
  Explore · haiku
  general-purpose · inherit
  Plan · inherit
  statusline-setup · sonnet

1. Run claude agents in iTerm or Terminal.app
2. Observe: shows the interactive TUI session dashboard with session list, status indicators, and input prompt

Expected behavior

claude agents should show the interactive session dashboard TUI in Ghostty, same as iTerm and Terminal.app.

Additional context

• Overriding TERM_PROGRAM=Apple_Terminal or TERM_PROGRAM=iTerm.app in Ghostty did not change the behavior.
• Same issue occurs inside cmux (terminal multiplexer), which may be a separate/related limitation.