Boris Cherny is the creator and head of Claude Code, Anthropic’s command-line coding agent. Before Anthropic he spent about five years at Meta as a principal engineer and wrote the book Programming TypeScript. In mid-2025 he briefly left Anthropic for the AI coding startup Cursor (Anysphere) but returned to Anthropic within roughly two weeks. As of 2026 he leads Claude Code at Anthropic.
Recent
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2026-09-11 Said production code written by Claude should be held to a higher bar than human-written code, and that Anthropic has guardrails in place to enforce that. Simon Willison (community relay of a primary quote)
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2026-06-11 Told Fortune he hasn’t written a line of code by hand in 8 months; Claude Code writes, reviews, and security-scans itself and has started generating its own feature ideas by scanning GitHub issues and Slack. Fortune
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2026-06-10 Fortune interview on Anthropic hiring criteria: generalists over specialists, low-ego collaborators, empiricists who defer to customer data over internal conviction. Fortune
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2026-06-08 At Fortune Brainstorm Tech (Aspen): manages hundreds to tens of thousands of AI agents on a given morning; Claude Code orchestrates sub-agents that are themselves Claude instances. Fortune
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2026-08-02 Running a live experiment where Claude Code has been rewriting the Claude Mac desktop app in Swift autonomously for 14-15 days; the model spawned its own Slack channel and posts screenshots every few minutes. At YC Startup School (one day after Opus 5 shipped) disclosed that deleting 80% of Claude Code’s system prompt improved performance; undocumented flag
CLAUDE_CODE_SIMPLE=1strips remaining prompts. Daring Fireball · HN · YC Startup Library