<ul data-eligibleForWebStory="true"><li>Code-first is considered a more mature design methodology compared to design-first for APIs.</li><li>Implementation code preceded API description languages to create a schematic representation of APIs for external consumption.</li><li>The need to describe APIs outside the code base has been essential in the API economy and software engineering.</li><li>API description languages allow developers to generate API documentation from the shape of the implementation code.</li><li>The methodology involves writing implementation code, implementing routing, applying annotations, and generating API description documents.</li><li>This approach has evolved over time and is not limited to OpenAPI, with support for code-first available in various programming languages and frameworks.</li><li>Examples in the article demonstrate code-first implementation using springdoc-openapi in Java and APIFlask in Python.</li><li>The examples showcase how code-first works with popular programming languages and frameworks by generating an OpenAPI description from code.</li></ul>

Why Code-first Works

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