Author: Wildcard
Edited by: Jingyu
The "Lego" mode of Claude Code has left programmers completely hooked.
The terminal has always been the most serious domain for programmers. Black background, white text, the blinking cursor—each line of output determines whether the code runs successfully.
But over the past two weeks, the direction of Claude Code has been completely derailed by a group of developers.
Someone raised a pixel pet above the input box: every time Claude calls a tool, the pet eats a meal; if the call fails, the pet gets sick immediately; and when encountering rm -rf, it panics and covers its head. Someone else brought in the Chrome offline dinosaur, so while Claude writes business logic in the background, users frantically press the spacebar to jump over cacti in the foreground. Others found themselves compulsively scrolling through their phones while waiting for the AI to think, so they created a 4-7-8 breathing guidance animation that automatically disappears once the answer appears.
Mod by developer jarrodwatts that plays Doom inside Claude Code | Image source: X
The most bizarre one is called Storytime. The author embedded a 260,000-parameter model into Claude Code, which generates a short story in real-time above the screen based on what Claude is currently doing. An AI programming tool running another AI that tells stories.
It all started with a system called Mods, released by Boris Cherny, head of Claude Code, on GitHub in mid-September. On October 1 local time, it was officially added to the changelog and enabled by default.
In just over ten days, a tool for typing commands and modifying code was turned by programmers into a "Minecraft" where anyone can build houses freely.
01 Vibe Coding LEGO is here
The mods in Claude Code are essentially a few lines of TypeScript functions running within plugins.
Don’t be fooled by its lightweight design—it packs serious power. It can open panels beside the chat, draw horizontal bars above the input box, modify built-in interfaces, intercept requests before Claude executes them, and even redirect requests to another model. No coding skills? No problem. Just tell Claude, “Help me write a mod,” and it can install new features all on its own.
The community then began producing content wildly.
The mod created by developer Ansu, which tells stories about work while working, is adorable | Image source: X
The OneWave AI team built ten mods in one night. Besides the pixel pet, there’s a “password launch” that requires entering a password before allowing disruptive commands; an “inner monologue” that opens a panel showing Claude’s dry commentary on your conversation; and an “agent race” that has multiple Claude sessions solve the same problem simultaneously, with a live scoreboard updating on screen.
Developer Hunter Su’s mod that allows one-click rendering of videos | Image source: X
Someone has already set up claudemods.ai, categorizing by game and dashboard, with voting functionality. Currently, the top-voted item is that little dinosaur.
This lively yet slightly humorous atmosphere can easily make people view Mods as just another geeky gadget.
But Anthropic inadvertently revealed a detail at launch: Claude Code’s /diff change panel and support for AGENTS.md are not hardcoded features—they were built by the official team using the same Mods system. The source code and tests are publicly available in the repository.
This detail changes the nature of the entire matter.
The official team and external developers use the same set of modified tools. Anthropic isn’t granting users limited skin-customization permissions; instead, it’s building its product with LEGO bricks, then tipping the entire box onto the table and telling everyone, “You can do this too.”
There is a subtle difference here from Minecraft. In Minecraft, the modding culture began with players hacking things together first, and the official team later embraced the community. With Claude Code, the official team opened the door from the start.
The party that takes the initiative usually knows better than anyone else what they want.
02 Is the Vibe Coding Store on the horizon?
Pulling back from the bustling community, you’ll notice that Anthropic’s recent activity has been unusually intense.
On September 23, Anthropic launched the Claude Marketplace, claiming over 2,000 plugins and connectors already available. On September 25, it opened the plugin submission portal, allowing paid developers to submit their work with automated validation, security scanning, and manual review—all in one streamlined process—with post-launch analytics for installations and usage. On October 1, Mods officially launched, bundled within plugins and also available for submission to the directory for sharing.
Store, listing review, developer dashboard, deep customization capabilities.
Within ten days, Anthropic assembled the full suite of an app store.
The company also stated that over the coming weeks, the Claude app and Claude Code will unify their plugin entry points. These mods in the terminal are being integrated into Anthropic’s broader ecosystem.
Compared to OpenAI next door, the conceptual differences are clear.
Codex adopted the pet mode early on | Image source: C# Corner
In May this year, Codex also launched pets—simply type /pet to summon a floating companion that helps you track Codex’s progress and allows AI to generate custom avatars; users even uploaded Microsoft’s Clippy. OpenAI awarded ChatGPT Pro memberships to the ten most popular pets.
But those are official pets that have been pre-made. You can change their skins, but you can't access the underlying layer.
Claude Code's pet is created by users using mods. One is a feature provided by the official team, the other is a tool provided by the official team.
The cost of openness is clearly laid out. The official documentation is straightforward: mods have the same machine access rights as Claude Code itself, and the code is written by the publisher, not Anthropic—only install mods from trusted sources. In theory, a malicious mod can do anything a malicious software package can. The documentation includes a dedicated page for enterprise administrators on how to manage mods.
03 CLI Spectrum
Viewed across the entire industry, AI programming tools are diverging into a spectrum.
On one end is Codex. It provides a plugin mechanism to package skills and integrate with MCP, but according to public information, neither the interface rendering nor the interception of tool calls has been delegated to third parties.
DeepSeek has just released the desktop version of DSH | Image credit: DeepSeek
On the other end is Harness, open-sourced by DeepSeek in August under the MIT license, touted as “everything is a plugin,” allowing complete replacement of agent loops and model adapters. It can even invoke Claude Code and Codex as its own sub-agents. On the same day Harness was released, DeepSeek-V4-Pro increased its pricing: orchestration remains free, while inference is charged—clear accounting.
Harness can host Claude, but Claude Code cannot host DeepSeek.
Claude Code sits right in the middle of this spectrum; its core reasoning loop is currently not open, but outside the core, it has granted nearly all possible permissions, including forwarding requests to another model.
This "controlled openness" is open enough for power users to reshape it to their liking, but not so open that they can replace Claude itself. Every mod written by a user deepens their dependence on this tool.
But the suspense lies precisely here.
Mods for Minecraft have thrived for over a decade thanks to passion and community reputation. The world of productivity tools is different. From publicly available information, Anthropic’s directory system shows no revenue sharing—developers of mods installed by tens of thousands receive nothing but usage data in the backend.
After the initial excitement of the first wave of experimentation fades, what incentive do developers have to continue contributing to a closed-source platform with no economic return?
Don’t underestimate the bond between people and tools | Image source: theodysseyonline
Anthropic has spilled the box of LEGO bricks onto the table. How large this "Minecraft" built from code can grow depends on what it ultimately leaves behind for its builders.
But don’t underestimate the bond between developers and users and the tools they create or customize; in a landscape where models are updated weekly, a skin or mod that resonates with you could be a key soft power in retaining users.
Twitter: https://twitter.com/BitpushNewsCN
BitPush Telegram community: https://t.me/BitPushCommunity
BitPush TG subscription: https://t.me/bitpush