---
title: "The Anthropic leader who built Claude Code says he ditched prompting — now he just writes loops."
url: https://daily.dev/posts/the-anthropic-leader-who-built-claude-code-says-he-ditched-prompting-now-he-just-writes-loops--p8qgluhaf
source_url: https://thenewstack.io/loop-engineering
type: article
source: "The New Stack"
published: 2026-06-10T17:09:16.308Z
updated: 2026-06-10T17:09:40.675Z
tags: ["ai-agents", "claude-code", "openai-codex"]
reading_time: 5
upvotes: 1
comments: 0
language: en
---

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# The Anthropic leader who built Claude Code says he ditched prompting — now he just writes loops.

**[The New Stack](https://daily.dev/sources/newstack)** · 5 min read · 1 upvotes · 0 comments

## Summary

Boris Cherny, head of Claude Code at Anthropic, sparked a conversation by saying he no longer prompts Claude directly — instead, he writes loops. Addy Osmani formalized this as 'loop engineering': an orchestration pattern where developers design automated agent workflows rather than manually prompting. Both Claude Code and OpenAI Codex now ship six core primitives (automations, worktrees, skills, connectors, sub-agents, and memory) that make loop engineering a first-class practice. A key design principle is separating the agent that writes code from a verifier agent that checks it. Osmani cautions about token costs and 'comprehension debt' — the risk of shipping code you never read — when loops run unattended.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://thenewstack.io/loop-engineering>

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---

Tags: [#ai-agents](https://daily.dev/tags/ai-agents), [#claude-code](https://daily.dev/tags/claude-code), [#openai-codex](https://daily.dev/tags/openai-codex)

[View this post on daily.dev](https://daily.dev/posts/the-anthropic-leader-who-built-claude-code-says-he-ditched-prompting-now-he-just-writes-loops--p8qgluhaf)