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ffetch: a production-ready http client with resilience features and a plugin architecture

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A from-scratch JSON engine for JavaScript: recursive descent parser, escape-aware tokenizer, and spec-compliant serializer

Swift on WebAssembly, Telegram-Style Spoilers, and Deleting Babel From Your Life

Building an in-browser APK compiler — binary XML streams and signature blocks in client-side JS

We forced our AI coding agents to hit 99% changed-line test coverage in TypeScript/Node.js. It immediately caught 4 deep production bugs.