AnalysisOpinion / analysisAgents & Tool Use1 source · Oct 11, 2026

Burn Your Flags: Interactive CLIs for Agents — Mark Lummus & Navinkumar Patil, PayPal

An agent can miss an interactive terminal prompt without producing an error.

Proof1 independent outlet

Key points

  • The human sees a question and arrow key options; the agent sees a redraw loop and loses the interface state.
  • PayPal's Mark Lummus and Navinkumar Patil use that failure to challenge the standard fix of adding more command flags.
  • Patil introduces three approaches: tmux sessions for sending keys and capturing terminal state, IPC side channels that expose structured JSON instead of screen scraping, and context injection that makes options and constraints explicit.
  • 0:00 - Introduction and the interactive CLI challenge

Sources (1)

Extractive summary: sentences quoted from the sources.

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