Anthropic details Claude Code origins, showing how its lead Boris Cherny transitioned to using 100% AI-generated code by late 2025
The terminal-based tool originally evolved from internal safety research.
The terminal-based tool originally evolved from internal safety research.
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The “build it at 20-30% capability now so the next model makes it 80-90%” mindset is brilliant. Pairing that with a deliberately small team that had to dogfood Claude heavily (ending up with ~90% of Claude Code written by itself) feels like a genuine masterclass in shipping agentic tools.



