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I wanted to better understand how Claude Code is wired under the hood, so I captured its API requests and pulled out the system prompt and tool definitions. Also posting the full thing as a gist below if you want to dig in!

Sergey Karayev

17,996 subscribers

85,545 Aufrufe • vor 1 Jahr •via X (Twitter)

Wissenschaft & Technologie Nachrichten & Politik Bildung

Anya Rossi• Live Now

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10 Kommentare

Profilbild von Sergey Karayev

Sergey Karayevvor 1 Jahr

Have fun. Lots to learn in there

Profilbild von Yogesh Kumar

Yogesh Kumarvor 1 Jahr

Great stuff 🔥 really helpful! P.S. Those subtitles are 🤌 How are you generating them?

Profilbild von thud

thudvor 1 Jahr

What's with the tell a joke line?

Profilbild von Sergey Karayev

Sergey Karayevvor 1 Jahr

And if you want to launch dozens of Claude Codes in parallel, check out

Profilbild von angel imaz (AI)

angel imaz (AI)vor 1 Jahr

thank you. model is even more impressive if that is what Claude Code is using.

Profilbild von moonbi

moonbivor 1 Jahr

@thdxr

Profilbild von arti

artivor 1 Jahr

You could just reverse the binary from the release that shipped with the source map like all of the open code type GitHub repos did

Profilbild von Gabriel Paiz

Gabriel Paizvor 1 Jahr

Is there a youtube link?

Profilbild von Jeffrey Behnke 💻

Jeffrey Behnke 💻vor 1 Jahr

Thanks for that. Interesting read

Profilbild von Ahmed

Ahmedvor 1 Jahr

This is great.

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So many people wanted to see my knowledge management system in Claude code, so here it is. All you need is Obsidian, Claude Code, GitHub, and the will to live and you too can set up your second brain in under 2 hours. If you want to learn how to build this, here’s the demo link:

So many people wanted to see my knowledge management system in Claude code, so here it is. All you need is Obsidian, Claude Code, GitHub, and the will to live and you too can set up your second brain in under 2 hours. If you want to learn how to build this, here’s the demo link:

Allie K. Miller

51,555 Aufrufe • vor 3 Monaten

Pi was built when there were already agent harnesses around. Here’s why Mario Zechner(Mario Zechner), found them suboptimal and built Pi, a minimalist self-modifying agent: #1 - Mario initially was a believer in Claude Code: "I was a believer in Claude code because they were the first that packaged agentic search up in a really compelling package. And at the time that fit my workflow really well. Everything around the LLM was kind of nice and tidy and easy to understand. I was super happy. I was proselytising Claude code." #2 - Reverse engineering Claude Code highlighted the degradation that Mario felt as a user: "I personally like simple tools that are stable and that I can rely on. Even if they have non-deterministic parts, all the deterministic parts should be as stable as possible. That was just not the experience with Claude Code around summer 2025. They would take away your control of the context. They would inject stuff behind your back, which is bad. Then, your workflows stopped working because there's now a system reminder that you don't even see in the UI that would modify the behaviour of the model. They would also do this to the system prompt. I built a little service where I can track the progression or evolution of the system, prompt and tool definitions and, with every release, it was messing with stuff. That just messed with my workflows and I don't appreciate that." #3 - PI was built with an appreciation for simple and reliable tools: "If I commit to a development tool, I want it to be a stable, reliable thing like a hammer. I don't want my hammer to break a different spot every day. That's terrible. We need somebody who goes the full velocity kind of way. But I don't want to work with a tool like that."

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The Pragmatic Engineer

62,825 Aufrufe • vor 2 Monaten

Cat Wu, head of product for Claude Code at Anthropic: "you can build almost anything with Claude from a single prompt now" one prompt gets you a working screen, not YOUR product Claude Code has never seen your design system, so it guesses the look fresh every time. how to hand Claude Code that system is in the article. better than the $300 design course in your tabs, and this one's free.

Cat Wu, head of product for Claude Code at Anthropic: "you can build almost anything with Claude from a single prompt now" one prompt gets you a working screen, not YOUR product Claude Code has never seen your design system, so it guesses the look fresh every time. how to hand Claude Code that system is in the article. better than the $300 design course in your tabs, and this one's free.

Mnimiy

113,663 Aufrufe • vor 1 Monat

Claude Code with Sonnet 4.5 is actually incredible I gave it a prompt for a super complex app, and it one shot the entire thing In this video I walk you through how to use Claude Code to build a prompt library app you can start using immediately (no coding experience required):

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Alex Finn

40,955 Aufrufe • vor 10 Monaten

ohhh my... Claude Code for Video Animations is insane. In 1 prompt you can create animated videos with Claude Code... w/ the new Remotion skill. And you can do this in the browser because uses Claude Code as the default agent. (Full prompt below 👇)

ohhh my... Claude Code for Video Animations is insane. In 1 prompt you can create animated videos with Claude Code... w/ the new Remotion skill. And you can do this in the browser because uses Claude Code as the default agent. (Full prompt below 👇)

The Agenteer

47,564 Aufrufe • vor 6 Monaten

Creator and head of Claude Code, Anthropic: "I don't prompt Claude anymore. I have loops running that prompt Claude and decide what to do. My job is to write loops." He hasn't hand-written a line of code since November. 100% is Claude Code now. Still ships 10 to 30 pull requests a day. He breaks down his actual workflow in the 1h28m podcast. Loops writing 100% of the code. Engineer leveling up, or automated out?

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shmidt

521,927 Aufrufe • vor 1 Monat

i built a tool that lets you clone ANY video with AI saw a movie scene you want to recreate? a commercial? a music video? just upload it to this tool and get the exact structured prompt to generate it in sora 2 you no longer need to guess how to describe what you want to generate. show the tool the reference and it engineers the prompt for you. the tool analyzes: - camera movements and angles - lighting and color grading - scene composition and timing then converts everything into sora-optimized prompt structure this is how you recreate any visual style without prompt engineering experience RT + reply 'TOOL' and i'll send you access (must follow so i can dm)

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Miko

42,962 Aufrufe • vor 9 Monaten

Did I just unlock claude-fable-5-lite? 😂 Since Fable 5 got pulled (US export control order, Anthropic is contesting it), I wanted to see how much of its character lives in the system prompt vs. the model itself. I ran the leaked Fable 5 prompt on Opus 4.8 head-to-head against stock 4.8.

Did I just unlock claude-fable-5-lite? 😂 Since Fable 5 got pulled (US export control order, Anthropic is contesting it), I wanted to see how much of its character lives in the system prompt vs. the model itself. I ran the leaked Fable 5 prompt on Opus 4.8 head-to-head against stock 4.8.

Jamieson O'Reilly

2,729,736 Aufrufe • vor 1 Monat

Hey everyone, I just want to say that i'm really really sorry and wanted to make a public apology. I did let the tools that I use every day (because they're objectively the best at everything) bias my content. Lets give a try. I now realize the tool in the video below is the best design tool. And there's starting templates in a simple interface. And I can deploy to Vercel in one prompt. And a video is coming out later today on how i build this in 45 minutes using Cursor.

Hey everyone, I just want to say that i'm really really sorry and wanted to make a public apology. I did let the tools that I use every day (because they're objectively the best at everything) bias my content. Lets give a try. I now realize the tool in the video below is the best design tool. And there's starting templates in a simple interface. And I can deploy to Vercel in one prompt. And a video is coming out later today on how i build this in 45 minutes using Cursor.

Riley Brown

115,837 Aufrufe • vor 1 Jahr

ASCII diagrams in Claude Code were driving me crazy. So I built a tool where Claude writes JSON → renders as interactive flowcharts and mockups → I edit visually → Claude sees my changes. Shoutout to Every 📧 for having me on the Vibe Code Camp livestream to demo this today We want to make this available! If you want access, comment "flowy" on this post. Here's 2 min on how it works:

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CJ Hess

199,961 Aufrufe • vor 6 Monaten

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ChainGPT

26,815 Aufrufe • vor 2 Monaten

Today, OpenAI announced the GPT4 Vision API. So I created a tool that uses GPT4-Vision + Facial Recognition to create real-time descriptions of the feed from my webcam If you want to see how I did it, leave a comment below and I'll send you the github repo 👇🏻

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Tyler Germain

82,523 Aufrufe • vor 2 Jahren

I made a little tool to better visualize the effect of the new text-box property and also generate the code for you!

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CSS by T. Afif

16,843 Aufrufe • vor 1 Jahr

"I don't prompt Claude anymore. I have loops running that prompt Claude and figuring out what to do. My job is to write loops. And this is transition we're going to see for the rest of the year." - Boris Cherny, head of Claude Code at Anthropic.

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Rohan Paul

2,302,968 Aufrufe • vor 1 Monat

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Stefan 3D AI

20,841 Aufrufe • vor 1 Monat

Try out Gemini Code: a coding assistant in your terminal powered by Gemini 2.5 Pro. 💜 💜 Release Notes: → It's easy to get started, just run `pip install gemini-code` in a virtual environment, and then run `gemini` to initialize it. It requires your own API key, so don't forget to get one from → I built this because I love Claude Code and wanted a similar experience -- I like that I can just use my own API key and Gemini is generally way cheaper as well. → Found a bug? Feel free to fork the code and fix it (lol)! If you want to try to improve it, please do so - repo is public! → Reminder and a disclaimer that I don't work at Google and this is not an official Google project - just a weekend side hack → It is highly likely you'll get throttled by rate limits - I put as much info as I can in the guide so you know what behavior to expect when that happens. You can also set which default model to use if you want to switch to 1.5 Pro.

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Raiza Martin

159,723 Aufrufe • vor 1 Jahr

The display stand I ship our Copland Supply keycaps in was also designed to double as protection during shipping! Only thing is I didn't realize how CRAZY strong it would be and I needed to also install a keycap removal tool so you could actually get it out lol

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Quinn Nelson

13,598 Aufrufe • vor 7 Monaten

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Alex Finn

36,936 Aufrufe • vor 3 Monaten

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Thariq

127,956 Aufrufe • vor 9 Monaten

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Claude Code just shipped v2.1.69 with a new built-in skill: /claude-api It detects your language, picks the right surface (direct API, tool use, or Agent SDK), and loads the relevant reference docs directly into context. Covers streaming, batches, files API, structured outputs, tool use patterns, MCP, also sets model defaults so you're not guessing. Useful when you're building on top of Claude and don't want to context-switch to the docs every 5 minutes.

Daniel San

152,831 Aufrufe • vor 4 Monaten