Why design-first
6 min · 50 XP · Read → Check → Complete
The problem with code-first
When teams build the implementation first and document the API afterward, the contract becomes an afterthought. Consumers wait for a working endpoint before they can start, feedback arrives late, and breaking changes slip out unnoticed.
What design-first changes
Design-first means the API specification is the first deliverable — agreed before any Mule flow is written. On Anypoint Platform that spec lives in Exchange, is authored in API Designer, and can be mocked instantly so consumers build against it in parallel.
The payoff you coach customers toward:
- Parallel work — frontend and backend teams start the same day.
- Early feedback — stakeholders review a mock, not a production outage.
- A single source of truth — the contract, not tribal knowledge.
- Governance hooks — standards can be enforced on the spec itself.
Coaching note
Design-first is a habit change, not a tool install. Guide teams to treat the spec review like a code review: small, frequent, collaborative. The goal is a contract the whole team trusts, not a document that gates delivery.
1. What is the first deliverable in a design-first workflow?
2. Which Anypoint capability lets consumers build against a spec before the API is implemented?