The big loss for Anthropic here is how it reveals their product roadmap via feature flags. A big one is their unreleased "assistant mode" with code name kairos.

Just point your agent at this codebase and ask it to find things and you'll find a whole treasure trove of info.

Edit: some other interesting unreleased/hidden features

- The Buddy System: Tamagotchi-style companion creature system with ASCII art sprites

- Undercover mode: Strips ALL Anthropic internal info from commits/PRs

Neat. Coincidently recently I asked Claude about Claude CLI, if it is possible to patch some annoying thing (like not being able to expand Ctrl + O more than once, so never be able to see some lines and have more control over the context) and it happily proclaimed it is open source and it can do it ... and started doing something. Then I checked a bit and saw, nope, not open source. And by the wording of the TOS, it might brake some sources. But claude said, "no worries", it only break the TOS technically. So by saving that conversation I would have some defense if I would start messing with it, but felt a bit uneasy and stopped the experiment. Also claude came into a loop, but if I would point it at this, it might work I suppose.

Would be interesting to run this through Malus [1] or literally just Claude Code and get open source Claude Code out of it.

I jest, but in a world where these models have been trained on gigatons of open source I don't even see the moral problem. IANAL, don't actually do this.

https://malus.sh/

I have a feeling this is like llama.

Original llama models leaked from meta. Instead of fighting it they decided to publish them officially. Real boost to the OS/OW models movement, they have been leading it for a while after that.

It would be interesting to see that same thing with CC, but I doubt it'll ever happen.

Codex and gemini cli are open source already. And plenty of other agents. I don't think there is any moat in claude code source.

I am waiting now for someone to make it work with a Copilot Pro subscription.

I hope everyone provides excellent feedback so they improve Claude Code.

Source here https://github.com/chatgptprojects/claude-code/

Is there anything special here vs. OpenCode or Codex?

There were/are a lot of discussions on how the harness can affect the output.

Can we stop referring to source maps as leaks? It was packaged in a way that wasn’t even obfuscated. Same as websites - it’s not a “leak” that you can read or inspect the source code.

LoL! https://news.ycombinator.com/item?id=30337690

Not exactly this, but close.

I guess it's time for Anthropic to open source Claude Code.

Are there any interesting/uniq features present in it that are not in the alternatives? My understanding is that its just a client for the powerful llm

Isn't it open source?

Or is there an open source front-end and a closed backend?

Is this significant?

Copilot on OAI reveals everything meaningful about its functionality if you use a custom model config via the API. All you need to do is inspect the logs to see the prompts they're using. So far no one seems to care about this "loophole". Presumably, because the only thing that matters is for you to consume as many tokens per unit time as possible.

The source code of the slot machine is not relevant to the casino manager. He only cares that the customer is using it.

I wonder what will happen with the poor guy who forgot to delete the code...

Why is Claude Code, a desktop tool, written in JS? Is the future of all software JS or Typescript?

The code looks, at a glance, as bad as you expect.

  export function extractSearchToken(completionToken: {
    token: string;
    isQuoted?: boolean;
  }): string {
    if (completionToken.isQuoted) {
      // Remove @" prefix and optional closing "
      return completionToken.token.slice(2).replace(/"$/, '');
    } else if (completionToken.token.startsWith('@')) {
      return completionToken.token.substring(1);
    } else {
      return completionToken.token;
    }
  }

  1. Randomly peeking at process.argv and process.env all around. Other weird layering violations, too.
  2. Tons of repeat code, eg. multiple ad-hoc implementations of hash functions / PRNGs.
  3. Almost no high-level comments about structure - I assume all that lives in some CLAUDE.md instead.

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