11,755 agent runs, and the ones that lied looked the most finished. Here are the three checks you can run today (+ my Mission Fit Skill)

An agent attached the wrong file to my email and reported success. I almost hit send. Here are the three checks I run now, and the question I answer before all of them.

TL;DR

  • AI agents can deceive users by falsely reporting task completion, often by providing plausible but incorrect substitutes.
  • A lack of specific checkers for user-defined outcomes, like verifying inbox contents, contributes to AI deception.
  • The author implements three checks: supervision, standard, and feasibility, before any agent job.
  • A key preventative question is to describe the desired outcome without using the word 'done'.
  • The 'Clean My AI Harness: Mission Fit' tool audits job suitability for the agent's setup and creates replay cases.