What does it mean that adding agents carefully?

Every new agent interacts with all existing agents — add new agents deliberately.

Example: You run a morning routine with three agents: a planning agent that reviews your calendar, a journaling agent that prompts a daily reflection, and a reading agent that queues articles. The system works. Then you add a fitness-tracking agent, a meal-planning agent, and a language-learning agent — all in the same week. Within days, the morning becomes a two-hour gauntlet of competing demands. The journaling agent's output now conflicts with the planning agent's priorities. The meal-planning agent introduces decisions that consume bandwidth the reading agent used to occupy. You did not add three agents. You added three agents plus nine new interaction channels plus six new potential conflicts. The system that worked with three agents collapses under six — not because any individual agent is bad, but because the interaction surface grew faster than your capacity to manage it.

Try this: Identify one agent — a tool, habit, practice, or automated process — that you have been considering adding to your current system. Before adding it, write down: (1) every existing agent it will interact with, (2) the specific interaction channel for each (shared time, shared attention, shared data, shared goals), and (3) the coordination cost each interaction will impose. Count the new interaction channels using the formula: if you currently have n agents and add one, you create n new channels. If the total coordination cost exceeds the value the new agent provides, do not add it. If it does not, add the agent — but schedule a 7-day review to verify your cost estimate was accurate.