AI agents are replacing web browsers as the primary discovery and interaction layer for software. Products that only offer GUI interfaces become invisible to agent-mediated users. Karpathy's thesis (as interpreted by Aakash Gupta): products must provide programmatic access — CLIs, APIs, MCP servers — so that AI agents can discover, evaluate, and operate them on behalf of users. The traditional funnel of website → demo → signup → onboarding collapses when an agent can evaluate and integrate a tool in seconds via its API surface. **Implication for product teams**: Agent-friendliness is not a feature; it is a distribution channel. Companies that build agent-accessible interfaces now capture the emerging discovery layer. Those that don't will compete only for the shrinking pool of direct-interaction users. **Design checklist**: - Does the product expose a CLI or programmatic API? - Can an agent discover what the product does without rendering a webpage? - Is there an MCP server or equivalent protocol for agent integration?