The business story
Boris Cherny is the engineer most credited with creating Claude Code, Anthropic's agentic coding tool, and he leads it. Claude Code is a product rather than a company, so Cherny is not a founder in the usual sense. His profile is that of a builder who helped move AI-assisted programming from suggesting lines of code to carrying out whole tasks under human review.
Cherny is open about using his own tool heavily.
Before Claude Code
Before joining Anthropic, Cherny spent about five years at Meta as a principal engineer. He is also the author of Programming TypeScript, published by O'Reilly and well regarded among developers.
That background is relevant to the tool he went on to build. Years inside large production codebases give an engineer a practical sense of what slows real work down: navigating many files, keeping changes consistent and running the checks that confirm nothing broke. Claude Code reflects those concerns. It is built for working across an entire repository, not for impressing in a short demo.
Building Claude Code
Claude Code started as an internal prototype at Anthropic: a terminal tool that let an engineer point a model at a codebase, describe a goal in plain language and let it read files, make edits and run tests itself. Within roughly a year it grew into one of the most influential developer tools of the period.
The shift it represents is in the unit of work. Earlier assistants, whether autocomplete or chat inside an editor, left the developer approving suggestions one line at a time. Claude Code belongs to the agentic category: given a task, it plans, edits across files, executes commands, checks results and iterates. The human's role moves from writing code to reviewing what the agent produced. It runs in the terminal and works alongside version control.
The tool's success pushed competitors, including GitHub Copilot and Cursor, toward the same agentic model.
In July 2025, Cherny and colleague Cat Wu, the two people most credited with building Claude Code, left for senior roles at Anysphere, the company behind Cursor. About two weeks later both returned to Anthropic. The industry press covered the episode widely, and HustleMemo's article reads it as a sign of how scarce and contested this kind of engineering talent has become, not as a comment on anyone's character.
