How Claude Code is built - by Gergely Orosz
newsletter.pragmaticengineer.com · 3,785 words · saved by 4 readers
A rare look into how the new, popular dev tool is built, and what it might mean for the future of software building with AI. Exclusive.
Deepdives How Claude Code is built A rare look into how the new, popular dev tool is built, and what it might mean for the future of software building with AI. Exclusive. Gergely Orosz Sep 23, 2025 ∙ Paid 832 16 62 Share Claude Code has taken the developer world by storm since being made generally available in May. The tool is currently generating more than $500M in annual run-rate revenue, and usage has exploded by more than 10x in the three months since that May release. I recently sat down with two of the founding engineers behind Claude Code: Boris Cherny (the engineer who came up with the
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