The Trigger Is Now a Signal, Not a Notification
Eyal distinguishes external triggers (a ping, a banner) from internal ones (a felt need that summons the product). In an agent-first product, the internal trigger moment is when a user decides to hand a task to the system rather than do it themselves. That moment of delegation is earned, not granted. It requires an evaluation harness that has already proven the agent reliable on that class of task — because a user burned once by a hallucinated output rewires fast in the wrong direction. Trust is the internal trigger, and you have to build it before you can depend on it.
Variable Reward Lives in the Output, Not the Interface
Hooked identifies three reward types — of the tribe, the hunt, and the self — all hinging on unpredictability that sustains engagement. For an agent product, the variable reward is not a notification badge; it is the quality and surprise of what the agent surfaces. A well-scoped tool returning structured results can generate genuine reward-of-the-hunt: the agent found something the user would not have found alone. The design work is context engineering — giving the model exactly what it needs so the output is reliably useful yet occasionally remarkable, not reliably mediocre.
Investment Compounds When the Agent Learns the User
Eyal's investment phase is where users load value back in — preferences, history, reputation — making the next cycle stickier. In an agentic workflow, investment is the data and feedback the user provides that calibrates future runs. Founders should design explicit moments for this: a human judgment checkpoint where the user approves, corrects, or redirects the agent's output. That correction is not friction; it is investment. The eval improves, the agent improves, and the user's sense of ownership deepens. Without that loop, the product is a one-shot tool, not a habit.
