Anthropic engineers now ship 8x more code per quarter than they did from 2021 to 2025. Fiona Fung, who runs the teams behind Claude Code and Cowork, explains exactly how that happened. She brings 25 years of engineering experience, including building TypeScript at Microsoft, launching Facebook Marketplace (now over $100 billion in GMV), and leading safety and infrastructure at Instagram.
This conversation is worth reading in full because Fung goes beyond the productivity headline. She details the specific Claude routines that changed how she manages her team, the context-switching problem that 20 simultaneous AI agents create and nobody has solved, and why she now hires for two profiles only: creative builders and deep systems experts. She also lays out how code review, roadmapping, and PM roles are structurally changing, not gradually, but now.
The hardest problem she identifies is not technical. It is maintaining team culture and accountability as AI-native workflows scale. Anthropic has already moved from six-month roadmaps to just-in-time monthly planning. Fung's concern about skill atrophy in junior engineers and what keeps her up at night on culture gives this episode a grounded counterweight to the 8x number.
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