JustHTML is a fascinating example of vibe engineering in action
SMRTR summary
Emil Stenström built JustHTML, a pure Python HTML5 parser that passes all 9,200+ browser vendor tests, using LLM coding agents over several months. Rather than just having AI write code, he employed sophisticated engineering practices like hooking in conformance test suites, building custom benchmarks and fuzzers, and making key architectural decisions himself while letting agents handle the actual code implementation.
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