Codex nearly one-shots a 20-year-old PHP codebase rebuild in modern JavaScript
cnakazawa · x · 2026-08-30
A developer shared a striking test: they handed OpenAI's Codex a 20-year-old PHP codebase and asked it to rebuild it in modern JavaScript — and it nearly completed the rewrite in one shot. The author called it "absolutely crazy" and "beautiful," a concrete signal of how far coding agents have come at legacy modernization.
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