Boris Cherny — creator of Claude Code and author of the frontend bible "Programming TypeScript" (O'Reilly) — shared his work stats for the past 30 days, and they read like a verdict on classical programming:
- **259** pull requests
- **497** commits
- **40,000+** new lines of code
- **0** lines written by hand
All of this was written by Claude Code itself, running on Opus 4.5.
How it works:
This isn't just "smart autocomplete." Boris uses agentic workflows: the model can work on a task for minutes or even hours (using stop hooks), run tests, fix its own bugs, and deliver a finished result. The longest session on the screenshot — 1 day 18 hours!
The senior engineer's role has shifted from "writing code" to "review and architecture." In one month, Boris burned through 325 million tokens. He calls it extreme dogfooding: the tool became powerful enough to fully maintain and develop itself.