Most API teams treat the contract as an afterthought: write code, generate a spec, then watch the two drift apart. Git-native API design reverses that flow. You treat the API contract as source code, version it in Git, and review every change the same way you review application logic.
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This guide focuses on implementation discipline, not a single tool. You’ll design contracts in branches, review them in pull requests, and turn a committed spec into mocks, tests, and docs. The goal is simple: your Git history should also be your API history.
If you already know what Spec-First tooling looks like and want the product walkthrough, read the companion piece on the git-native API workflow. This article stays focused on practice.
What “git-native” means for API work
