{"id":141247,"date":"2026-08-16T02:27:14","date_gmt":"2026-08-16T02:27:14","guid":{"rendered":"https:\/\/www.europesays.com\/ai\/141247\/"},"modified":"2026-08-16T02:27:14","modified_gmt":"2026-08-16T02:27:14","slug":"rails-creator-dhh-rewrites-python-library-in-rust-using-claude-code-in-3-hours","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/ai\/141247\/","title":{"rendered":"Rails creator DHH rewrites Python library in Rust using Claude Code in 3 hours"},"content":{"rendered":"

Rails creator DHH used Claude Code to rewrite the Python library TerminalTextEffects into Rust code in 3 hours and 11 minutes, consuming 11 million tokens.<\/p>\n

Article author and source: AI New Era<\/p>\n

The creator of Claude Code has publicly stated that he hasn’t written a single line of code by hand in over two months.<\/p>\n

In one day, he was able to merge 27 PRs, all handled by Claude.<\/p>\n

<\/p>\n

OpenAI researcher Roon put it even more bluntly: “I don’t write code anymore; 100% is done by GPT.”<\/p>\n

Now, another expert, after deeply experiencing Claude Code and Codex, exclaimed, “In five years, humans won’t write code anymore!”<\/p>\n

Over the past few days, Rails’ creator DHH personally took on a major undertaking\u2014<\/p>\n

Rewritten entirely in Rust from the Python library ‘TerminalTextEffects’, using only Claude Fable 5.<\/p>\n

Amazingly, this restructuring burned 11 million tokens, almost clearing the challenge in one go.<\/p>\n

<\/p>\n

The results after optimization were phenomenal: startup time was reduced from 87 milliseconds to just 2 milliseconds, and rendering speed increased by 9.6 times.<\/p>\n

As soon as the post was published, it instantly drew a million viewers online.<\/p>\n

An AI expert cut to the chase and posed a profound question to the creator of Rails: “If that’s the case, where should Ruby go in the next five years?”<\/p>\n

DHH’s response was very straightforward\u2014<\/p>\n

Within five years, very few people will still be manually writing or reading code, so it really doesn\u2019t matter.<\/p>\n

<\/p>\n

Who could have imagined that just one year later, the contrast would be so stark!<\/p>\n

Hand over the keyboard to AI; I’d rather retire.<\/p>\n

In May last year, DHH was still firmly advocating online that the joy of coding should not be surrendered to AI.<\/p>\n

In the lengthy article “Coding should be a vibe!”, he clearly stated:<\/p>\n

AI is at best a supportive “pair programmer,” useful for checking APIs and answering questions.<\/p>\n

He even made a strong statement: “If one day I must completely hand over the keyboard to AI, I’d rather retire.”<\/p>\n

<\/p>\n

I have no intention of giving up coding at all. This isn\u2019t some grunt work I\u2019d hand off to AI\u2014what would be the point? To become a project manager for a bunch of AI “mob”?<\/p>\n

During Lex Fridman\u2019s six-hour in-depth conversation, DHH insisted that every line of his code was written by hand.<\/p>\n

While building a Linux distribution, he repeatedly had AI generate the same Bash conditional statement, until he suddenly realized that without typing it out himself, he hadn\u2019t truly learned it.<\/p>\n

The loss of this “muscle memory” left him shaken, wondering, “Could this be the end of learning?”<\/p>\n

<\/p>\n

However, in April this year, the tide turned sharply.<\/p>\n

In a podcast, he admitted that he has now fully shifted to an “agent-first” approach and has largely moved away from writing code by hand.<\/p>\n

Yet, it was from the father of Rails himself that the statement \u201cIn five years, not many people will still be reading or writing code\u201d was uttered.<\/p>\n

Fable 5 all-in<\/p>\n

In five years, no one will write code.<\/p>\n

Take a close look at Claude’s hardcore rewrite of Python.<\/p>\n

TerminalTextEffects, abbreviated as TTE, is a terminal visual effects engine.<\/p>\n

It can be used as a command-line program or imported as a Python library into other applications.<\/p>\n

Developers can, like magicians, control the movement, colors, gradient effects, and animation sequences of text to transform dull UIs into stunning experiences.<\/p>\n

<\/p>\n

The Rust version demonstrated by DHH can run 37 effects.<\/p>\n

A software that originally required a Python runtime environment has been transformed by Claude into a mere 3MB executable file.<\/p>\n

This new repository is called ttfx and is hosted under DHH’s own Omarchy organization, with every commit preserved.<\/p>\n

The entire process took 3 hours and 11 minutes, with 21,000 lines of main Rust code\u2014nearly identical in size to the original Python version.<\/p>\n

In the task, eight agents work simultaneously on separate branches, merging in batches: each reads the code, generates the implementation, compiles it, runs tests, handles failures, then proceeds to the next round.<\/p>\n

\u6240\u8c13\u300cone-shot\u300d\uff0c\u5b9e\u9645\u4e0a\u662f\u4e00\u6b21\u6027\u4ea4\u4ed8\u4efb\u52a1\u3002<\/p>\n

<\/p>\n

Using the same approach, DHH had Codex complete the task, and the result after a single prompt was also excellent.<\/p>\n

However, the speed is 30% slower, and the token cost is $43 (\u00a5290).<\/p>\n

<\/p>\n

DHH’s aggressive move directly drew out several top figures from Anthropic.<\/p>\n

Boris Cherny, the creator of Claude Code, couldn’t resist appearing in the comments to exclaim, “This is amazing!”<\/p>\n

In response to further questioning from researcher Thariq, DHH revealed an astonishing detail\u2014<\/p>\n

He simply asked Claude to create a plan, then intervened zero times throughout the process\u2014no complex workflows, no preset goals, fully empowering the process.<\/p>\n

<\/p>\n

Million-line codebase, migrate with Bun in one click<\/p>\n

TerminalTextEffects, given its limited scale.<\/p>\n

What truly demonstrates the power of AI coding is the major refactoring beneath Bun.<\/p>\n

Several months ago, founder Jarred Sumner personally led the migration of the large codebase from Zig to Rust.<\/p>\n

<\/p>\n

Amazingly, this massive project involving a million lines of code was completed in less than two weeks.<\/p>\n

A few years ago, a move of this magnitude would have been a marathon lasting multiple quarters, even years.<\/p>\n

Future developers must become “How to Train Your Dragon” masters.<\/p>\n

Today, all signs are wildly suggesting a harsh yet exciting truth\u2014<\/p>\n

The marginal cost of code generation is approaching zero indefinitely.<\/p>\n

This inevitably causes many people to fall into panic: “If no one is coding in five years, will programmers disappear?”<\/p>\n

In fact, “no one writes code” does not mean that programmers disappear.<\/p>\n

<\/p>\n

Future programmers will experience a fundamental shift in their core responsibilities\u2014<\/p>\n

Shift entirely from “writing code by hand” to defining requirements, designing constraints, establishing testing frameworks, and evaluating whether AI has written the code correctly.<\/p>\n

It is foreseeable that when “coding from scratch” becomes history, the only two true moats remaining in the future will be:<\/p>\n

Gain insight into “what’s worth doing” and define “what counts as right.”<\/p>\n

Instead of worrying about losing your keyboard, start now by thinking about what kind of Rome you want this boundlessly powerful AI, your “super coder,” to build.<\/p>\n","protected":false},"excerpt":{"rendered":"Rails creator DHH used Claude Code to rewrite the Python library TerminalTextEffects into Rust code in 3 hours…\n","protected":false},"author":2,"featured_media":135838,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[53,3154,9055,182,9056,9751],"class_list":["post-141247","post","type-post","status-publish","format-standard","has-post-thumbnail","category-anthropic","tag-anthropic","tag-anthropic-claude","tag-bitcoin-exchange","tag-claude","tag-crypto-exchange","tag-cryptocurrency-exchange"],"_links":{"self":[{"href":"https:\/\/www.europesays.com\/ai\/wp-json\/wp\/v2\/posts\/141247","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/ai\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/ai\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ai\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ai\/wp-json\/wp\/v2\/comments?post=141247"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/ai\/wp-json\/wp\/v2\/posts\/141247\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ai\/wp-json\/wp\/v2\/media\/135838"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/ai\/wp-json\/wp\/v2\/media?parent=141247"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/ai\/wp-json\/wp\/v2\/categories?post=141247"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/ai\/wp-json\/wp\/v2\/tags?post=141247"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}