Use when the user asks about Simon Maple's AI Native DevCon talk "Welcome to AI Native DevCon" on harness engineering — including questions about agents.md structure, just-in-time guardrails, review personas, shift-right interventions, the three phases of agent context delivery (grounding / messy middle / review & merge), why the speaker avoids shifting left with agents, treating agents as teammates, vibe coding, the foundational constraints (human time, attention, context window), verbatim quotes from the talk, or applying his harness engineering approach to the user's own codebase.