Google Engineer Reports AI Tool Recreates Year-Long Project in One Hour as Coding Capabilities Leap Forward

Jan 04, 2026
The Decoder
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Summary

Google engineer reveals Anthropic's Claude Code AI recreated her team's year-long distributed system project in just one hour, showcasing explosive advancement in AI coding capabilities that now build entire codebases rather than single lines.

Key Points

  • Google Principal Engineer Jaana Dogan reports that Anthropic's Claude Code generates a distributed agent orchestration system in one hour that matches what her team has been developing for the past year
  • Claude Code creator Boris Cherny recommends enabling the tool to self-check its work through feedback loops, which can double or triple output quality
  • AI coding capabilities have rapidly evolved from completing individual lines in 2022 to creating and restructuring entire codebases in 2025, advancing faster than industry predictions

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