How does the coding tool now responsible for writing the majority of code at Anthropic — and generating tens of billions in revenue — trace its origins? According to the people who built it: it started with a bare CLI in a weekend.
Anthropic dropped something unusual on July 6, 2026: not a product launch or a benchmark drop, but a genuine piece of tech journalism about themselves. The Making of Claude Code is a 7-chapter oral history published at anthropic.com/features/making-of-claude-code, featuring first-person accounts from the people who built, argued about, almost killed, and ultimately shipped one of the most consequential developer tools of the past decade.
It went viral almost immediately — and for good reason. This is a rare inside look at how a major AI lab ships real product.
From Weekend Hack to World-Changing Tool
The oral history traces Claude Code’s evolution across seven chapters, covering the timeline from early internal experiments to the full agentic coding system it is today. Contributors include Boris Cherny, the engineer credited with creating Claude Code, Dario Amodei (Anthropic’s CEO), Cat Wu, Sid Bidasaria, and a cohort of early internal users who were the first to bet their workflows on it.
The story Cherny tells is one familiar to anyone who has shipped something they weren’t sure would survive contact with users: a bare CLI, built over a weekend as a side project, that quietly started eating everyone’s workflows before anyone decided it was officially a product. Cherny has noted in contemporaneous coverage that today he writes zero manual lines of code in some of his workflows — Claude Code handles the full loop.
What’s striking in the oral history is how unplanned the trajectory was. Claude Code wasn’t born from a top-down product roadmap — it emerged from engineers solving their own problem, then other engineers noticing. That pattern of internal dogfooding as product discovery is something the founders lean into directly.
What the Seven Chapters Cover
The structure of the oral history itself is part of the story. Published in a format that lets you read it as a standard article or in terminal ASCII art mode (a nod to the CLI roots of the tool), each chapter covers a distinct phase:
- The prototype era: the bare CLI and its first internal converts
- The argument phase: internal debates about whether this should be a product at all
- The scaling decision: when Anthropic committed to making Claude Code a flagship
- Early user stories: accounts from the first people outside the team to build on it
- The agentic turn: when Claude Code evolved from a coding assistant into a multi-agent orchestration layer
- The present: Claude Code’s current role writing the majority of Anthropic’s own code
- What comes next: thoughts from the founders on where agentic coding goes from here
The terminal mode isn’t just aesthetic — it’s a reminder that Claude Code’s natural habitat is still the command line, even as it’s grown to manage fleets of sub-agents, spawn background workers, and integrate with CI/CD pipelines.
Why This Matters for Practitioners
Beyond the nostalgia factor, the oral history contains some genuinely useful signal for teams building on or with Claude Code:
The zero-manual-lines workflow is real. Cherny’s claim that he writes zero manual lines of code in some workflows isn’t marketing copy — it’s a description of how the tool is actually used internally at Anthropic. For practitioners wondering whether fully autonomous coding loops are production-viable, the answer from the people who built it is: yes, for the right scope.
Dogfooding drove the product. The history makes clear that Claude Code’s feature set was shaped by internal engineers solving real problems. That means the tool has been shaped by people who care intensely about developer experience at the agent level — not just the chat-interface level.
The agentic turn was deliberate. At some point, the team made a conscious decision to evolve Claude Code from a per-session assistant into something that could spawn sub-agents, run in the background, and operate autonomously across long tasks. The oral history documents that decision and the thinking behind it — useful context for anyone designing their own agentic architecture around Claude Code.
A New Genre of AI Company Communication
There’s a meta-point worth making here: The Making of Claude Code is an unusual thing for an AI lab to publish. Most product announcements are tightly controlled narratives about capability jumps. This is something closer to genuine institutional history — with real disagreements, near-misses, and candid accounts of what didn’t work.
That kind of transparency is rare. And at a moment when Anthropic is navigating an IPO path, a Pentagon relationship under scrutiny, and the weight of being the AI company most associated with safety-first development, publishing an honest oral history feels like a deliberate cultural statement: this is how we think about building things, and we want you to know.
Whether you’re a Claude Code power user, a developer evaluating agentic tools, or someone who just finds the sociology of how AI products get built interesting — this is worth an hour of your time.
Sources
- The Making of Claude Code — Anthropic
- Boris Cherny — Claude Code origin coverage (Bloomberg, 2026)
- Anthropic Series H announcement ($47B ARR context)
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