Connecting to the bigger picture

This chapter is the operational payoff of the whole guide. The cost model is Chapter 4's curve plus Chapter 5's caching, made into dollars. The security incidents are why Chapter 7's sandboxing and approvals and Chapter 13's supply-chain warning exist. The verification principle is Chapter 13's "agents cannot mark their own homework" restated for production, and the budgets that cap retry storms are Chapter 12's. The next and final chapter assembles every component into one runnable harness, with these production lessons baked into its defaults (budgets on, approvals on, human review encouraged).