Thimble
Open source Claude Code plugin that explains what an agent did, with visualizations in the terminal.
Best Claude Builds on X
Skills, CLIs and internal tools people actually run on Claude Code. If it is just a prompt dump with no repo or demo, it does not make this list. 102 builds on this page, each with the original post.
Claude Fable 5.2
Anthropic's public model for the hardest technical work. Up to 30% faster than Fable 5.1, and cheaper. Live on the Claude apps, Claude Code, and the major clouds.
Claude Mythos 5.2
The restricted twin of Fable 5.2. Access is through Anthropic's cyber and life sciences verification programs.
Fable 5.2 in Claude Code
Fable 5.2 in the Claude Platform and Claude Code. Faster than Fable 5.1, at a lower token price.
Fable 5.2 on Vercel AI Gateway
Fable 5.2 on the Vercel AI Gateway. First-party from Vercel.
Voxel engine
A voxel destruction engine from one Fable 5.2 prompt. Playable in the browser.
Voxel Earth
A playable voxel Earth. Walk anywhere and break the ground. Weather tracks the real world. Built with Fable 5.2.
Fable 5.2 on AWS
Fable 5.2 on Amazon Bedrock and Claude Platform on AWS. First-party from AWS.
Which Claude model to build with
Anthropic's guide to picking Fable 5.2, Opus 5.5, Sonnet, or Haiku, and when to raise effort instead of switching models.
Turbo Tails
Browser kart racer with six cars, drifting, ramps, and items. Single player and multiplayer. Built with Fable 5.2.
From-scratch shooter
A browser shooter from one Fable 5.2 run. Models, sounds, and textures made from scratch. Playable as a Claude artifact.
Fable 5.2 in GitHub Copilot
Fable 5.2 in GitHub Copilot for long coding jobs across large codebases. First-party from GitHub.
Ratchet Loop
Claude Code and Codex loop that runs the tests, then has a second model try to break the result. Open source.
Agent Readiness
Claude skill that scores how ready a repo is for a coding agent. Open source.
Cook
Claude skill for visual builds that have to match your reference images. Open source.
ASO Shots
Claude Code skill for App Store and Play screenshots. It writes the headlines, gives three design directions, and exports the set. Open source.
LeanREA
An 8 KB skill for reverse engineering with plain CLI tools and no MCP server. Free and open source.
Chessmod
Chess inside Claude Code. A ladder of bots sits above the prompt while the agent works.
Haiku Harbour
A seaside town you share with hundreds of NPCs and other players. Built with Claude Haiku 5.5.
Clawd RPG
A small 3D fight. You play as Clawd, the bosses are other models, and you pick up Haiku, Sonnet and Fable on the way.
Claude Opus 5.5
Anthropic's first Claude 5.5 model. Fable-level on most work, about 40% cheaper than Opus 5. API id claude-opus-5-5.
Antikythera
Underwater excavation game about the first computer. Single 3 MB HTML file. Everything you see and hear is generated in the browser.
Arkenfall
Open-world browser game. Terrain, creatures, boss, sound, and music all in code. No asset files.
Sakutei
Japanese garden sandbox in the browser. Rake sand, set stones, waterfall, lanterns. Four styles and seasons.
Stickman (Opus 5.5)
Stickman fighter with character customization and skills. One HTML file from Opus 5.5. Playable.
netherspace
Low-effort platformer. An AI agent wakes up and reveals the world as he solves queries. Claude Opus 5.5.
S3GA Rally
Retro rally in the browser. C++ engine, no asset files. Opus 5.5, MIT, playable.
Jev Skill Suggestion
Claude Code mod. Jev picks one skill per prompt and injects only that SKILL.md. The rest stay out of the context window.
claude-jev
Wires Jev into Claude Code so every review finding is scored before you read it.
Voizecode
ChatGPT-style voice mode for Claude Code. Pick up a session on your phone, talk, and watch word highlights.
Sticker Shader
Cut photos into holographic die-cut stickers in the browser. One Fable 5.1 prompt. First-party, client-side only.
Fledgling
Leave the nest as a small bird. Multiplayer valley, glide and chirp. Built with GitHub Copilot Autopilot on Fable 5.1.
ContextClues
Local dashboard of what a running Claude Code session has in its context window. Tokens, tools, evidence. npx contextclues.
Claude Fable 5.1
Anthropic's public Mythos-class model. Long-horizon coding and research, cheaper cache reads. Live everywhere today.
Claude Mythos 5.1
Same weights as Fable 5.1, fewer safeguards. Restricted to cyberdefenders and life scientists via trusted access.
Fable 5.1 in GitHub Copilot
Fable 5.1 in Copilot, the CLI, and VS Code. First-party from GitHub.
Fable 5.1 on Google Cloud
Fable 5.1 on Google Cloud Agent Platform. First-party from Google Cloud.
Fable 5.1 on fx.sh
Fable 5.1 on fx.sh the day it dropped. First-party from the builder.
Fable Crossy Road
A Crossy Road clone one-shotted by Fable 5.1. Playable.
Shopiframe Paper
A paper-shop hero generated in Fable 5.1 in about ten minutes. First-party, with a live page.
Fable 5.1 on Merge Gateway
Fable 5.1 on Merge Gateway. First-party from the company.
Claude Security on Mythos 5
Claude Security scans now run on Mythos 5. Public beta for Claude Enterprise. First-party.
Mythos cryptographic weaknesses
Mythos Preview found new attacks on HAWK and a reduced AES. First-party research from Anthropic.
Cold Watch
An FTL-style ship sim with retro graphics, one-shotted by Fable 5.1. First-party from Ethan Mollick, playable.
RMS Titanic 1912
Steer the Titanic and miss the iceberg. Two prompts in Fable 5.1, Three.js, playable on Netlify.
Onslaught
A Three.js arena shooter from one Fable 5.1 prompt. ADS, recoil, three guns. Playable, source public.
Isle of Fangs
ARC survival with cooking, crafting, and rideable dinosaurs. One Fable 5.1 prompt, playable on Tesana.
Flappy Bird Deluxe
A Flappy Bird one-shot from Fable 5.1. Playable on Arena.
Cyphral Distich
Fable 5.1 decoded Sir Thomas Urquhart's 1653 cipher, unsolved for 373 years. First-party from Vals AI.
genart-skill
Claude Code plugin for generative art. Determinism from a hash, same piece at 400px and 4000px, rarity checks before minting.
claude-openrouter
Installer that puts GLM-5.3 next to Claude models inside Claude Code, via OpenRouter.
pyATS Skills
Agent skill that teaches Claude how Cisco pyATS works, without standing up an MCP.
susu-phone-agent
Claude Code drives a real Android phone over MCP and Shizuku. No root, no model on the device.
Token Billing
Reads your Claude Code transcripts and shows where the money went, per tool and per command. Runs in the browser, nothing uploaded.
Auditician
Open-source Claude agent definitions that pretty much fully automate a security audit.
Last Train Records
Experimental three.js record-label landing page, built with Claude Code and fully open-sourced.
b3t Protocol Launchpad
A custom token launchpad paired with a Claude pipeline that turns study notes into textbook-style blog posts.
Claude Code Trading Bot
A trading bot built with Claude Code in two days that scans 50+ markets for arbitrage. The post claims it turned $68 into $750k.
Merge Agent Handler
An agent built with Claude, GitHub and Notion that finds recently merged PRs, summarizes what shipped, and posts a fresh digest to Notion every Monday.
LedgerPDF
Free, offline, open-source workpaper binder for accountants. Agents connect over local MCP, every change is journaled, and humans still sign off.
Braun BC02 Web Clock
The Braun BC02 alarm clock rebuilt as a fully interactive web app with Claude Code.
Leak Radar
Ten free Claude Code skills that hunt money leaks: dead subscriptions, price hikes, idle cash, the right card per purchase, and debt payoff math.
Beacon — Save the Ships
Browser game in one 45 KB HTML file. Ships are blind and only turn toward light. A wreck costs a heart. Built in one Claude session.
AgentLayer /cards
Skill that lets your Claude agent get a real payment card (US or international) and spend via x402 + USDC.
5 High-Value Claude Lead Gen Skills
Plug-and-play Claude Skills based on frameworks from Hormozi, Gadzhi, GaryVee, Brunson and Neil Patel for improving outreach pipelines.
Claude Financial Services Plugins
Four official Anthropic plugins (Financial Analysis, Market Researcher, Equity Researcher, Earnings Reviewer) for deep stock research.
Obsidian Claude Code MCP Plugin
Obsidian plugin that runs its own MCP server inside your vault so Claude Code automatically connects, reads, and writes your notes with zero config.
Space Website (built in 8 hours)
Beautiful fully animated website designed and built in just 8 hours using Claude. All scroll interactions and animations done in React.
Claude → Real iOS Device Builds
System that lets Claude push new iOS app development builds directly to a physical device while you're away from your computer.
Book-to-Skill
Turns any PDF, EPUB, DOCX or Markdown book into a ready-to-use Claude Skill that loads only the relevant chapters when needed.
Open-source Claude Code Alternative
Free open-source alternative that lets you use 10+ AI providers (DeepSeek, Kimi, etc.) instead of expensive Claude API fees.
Dial – Focus Timer
Clean minimal focus timer app for iPhone built with Claude. Now includes square style and standby mode.
Free Claude Code
Multi-provider proxy and launcher for Claude Code / Codex / Pi with a local Admin UI supporting 31+ cloud and local LLM backends.
n8n + Claude Agent System
Practical system of 47 working agents built with n8n and Claude, including the three prompts that actually work.
Waddle Labs – Claude Code for Robots
Connect Claude-style agent workflow directly to physical robots. Describe the task and the system writes the code to execute it in ~20 minutes.
Claude iPhone Controller
Lets Claude see and control your real iPhone through macOS Screen Mirroring using OCR + simulated taps.
Fabric-Aware Virtual Try-On
Upload your photo and measurements to see exactly how clothes will look and fit on your body.
pi-claude-link
Open-source extension that lets Pi sessions talk to Claude Code sessions in real time (agent-to-agent messaging).
ECC – Ultimate Claude Skills Pack
Massive open-source collection of 279 skills and 67 agents that works across Claude Code, Cursor, Codex and more. Won Anthropic hackathon.
QR Phone-to-Phone File Transfer
Sends files between phones with no WiFi, Bluetooth or network. QR codes flash on one screen into the other camera at 129KB/s. Built in one night with Claude Code.
Claude Code SEO Skill
Claude Code skill that reads Google Search Console, finds keyword gaps and writes posts. 158 posts, 20M impressions and 77k clicks in 5 months, with receipts.
Ix – Living Codebase Map
Open-source tool that gives coding agents a persistent map of your codebase, cutting token burn by 30 to 99.7% across Claude Code, Codex, Cursor and more.
grapevine – Cross-session Claude Code
Free open-source Claude Code plugin that lets your parallel sessions see what each other are doing, built on the new cross-session messaging feature.
Falcon 9 Launch Sim in Three.js
SpaceX Falcon 9 launch, stage separation, boostback and landing simulation one-shotted in Three.js with Claude inside Claude Code.
Claude Code Job Interviewer
Program built with Claude Code that interviews job applicants over chat, scores fluency and thinking, and flags likely AI-assisted answers. Live in production.
Karpathy-style Second Brain
Complete system using Claude + Obsidian skills that turns your notes into a compounding second brain.
Claude-powered Notion Cleaner
Vite app built with Claude Code that helps clean and organize messy Notion workspaces.
Onchain Prediction Market on Canopy
Complete prediction market (markets, shares, resolution, frontend) vibe-coded with Claude and launched as its own virtual chain in 21 minutes.
Canopy Sovereign Chains
Platform that lets developers vibe-code full onchain apps and launch them as their own virtual chains with shared security.
$4,199 Claude Code Robot
Physical robot you can program directly with Claude Code or Codex to help with real-world tasks like working on cars.
Seedance 2.5 Claude Skill
Complete official ByteDance Seedance 2.5 prompt guide turned into a ready-to-use Claude skill with 67 templates.
Mac Notch → iPhone + Apple Watch
Upgraded Mac notch app that now pings your iPhone and taps your Apple Watch when Claude Code, Cursor or other agents finish or need input.
mattpocock/skills v1.2
Matt Pocock's agent skills repo hits v1.2 with full docs and 63% cheaper skill descriptions. 13.5M downloads and one of the most-starred repos on GitHub.
Full Social Media Claude Skills Stack
7 free Claude skills that handle content strategy, writing, grading, scheduling and repurposing.
Claude + Codex + Kimi Founder OS
40 interconnected AI systems that run a real 7-figure company with almost zero human decisions.
24/7 AI Content Team
Fully automated content system using Claude that writes posts, replies to comments, tracks engagement and repurposes content.
Viral Ad Cloner Claude Skill
Show Claude one viral ad and it clones the entire style, pacing, and structure while swapping in your product.
Claude of Duty
Fully playable Three.js FPS built by Claude Opus 5 from a single prompt using a multi-agent builder and critic loop. Prompt and repo open-sourced.
Mac Notch AI Agents
Run Claude Code, Cursor, Grok, Codex, Antigravity and more side-by-side inside the Mac notch with smart notifications.
Video Creative Teardown Skill
Drop any video into Claude Code and get a full creative analysis powered by Gemini vision.
Google Maps Lead Gen Scraper
Claude Code tool that extracts hundreds of local business leads with phones, emails and websites in minutes.
