As a front-end engineer and engineering manager, I focused on building developer tools for open source projects such as React Native, Jest, or Metro for the past ten years. I am restless in searching for a better user experience, and I lose sleep over misaligned pixels. I deeply care about how people feel about the tools they are using every day. This experience informed how I think about building software, and the team I work with lives by several principles we defined together. I am sharing this manifest with you in hopes that it’ll be useful to shape your high-level thinking of developer tooling, too.

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