CI goes red while you're in a meeting, and by the time you're back the failure has gone cold. Auto-fix watches the build for you and pushes a fix before you've even opened the tab.
A for loop calling the model once per ticket pays full price and competes with live traffic for the same rate limit. The Batch API processes up to 100,000 requests at once, at half the cost — for exactly the work that was never going to need an answer in three seconds.
Every new chat starts from zero — you paste in the same style guide, the same checklist, the same 'not like that' before Claude gets it right. Agent Skills let you write that knowledge down once, as a folder Claude opens only when the task actually needs it.
Every AI assistant your team adds needs the same connection to your order database, your CRM, your ticket queue — built again, in a different SDK. Model Context Protocol lets you build that connection once.
Chat is a conversation. Agents are a system that reads, decides, and acts — which means the engineering bar, and the failure modes, are completely different.
Getting a demo working is the easy 20%. Here's what separates a prototype from something you can trust running unattended in front of customers.