mcporter/docs/tmux.md

tmux Hang Diagnostics

Use tmux to verify whether a CLI command actually exits or is stalled on open handles. This keeps the main shell free while you inspect logs.

1. Start the command in a detached session:

   tmux new-session -ds mcporter-check "pnpm exec tsx src/cli.ts list"
   

2. Wait a few seconds, then ask tmux if the session is still running:

   tmux has-session -t mcporter-check
   

   • Exit status 1 (can't find session) means the process exited normally.
   • Exit status 0 means the command is still running (or hung) inside the session.
3. Capture the output without attaching:

   tmux capture-pane -pt mcporter-check | tail -n 40
   

4. Once finished, clean up the session:

   tmux kill-session -t mcporter-check
   

This workflow makes it easy to confirm whether mcporter commands return promptly after shutdown changes (for example, when debugging lingering MCP stdio servers). Use MCPORTER_DEBUG_HANG=1 to emit active-handle diagnostics inside the tmux session when necessary.