I Ported 60,000 Lines of PHP to NodeJS/TypeScript in just 14 Hours. The Speed Wasn’t the Surprise.
SMRTR summary
A developer used Claude Code (Opus 4.8) to port 60,000 lines of legacy PHP to a TypeScript/Node.js backend in 14 hours — but the real story is how it actually worked. It wasn't autonomous; it required constant human validation using a live frontend as ground truth. Claude also wrote unit tests unprompted, turning a risky migration into a verifiable drop-in replacement.
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