Claude Code's source code has been leaked via a map file in their NPM registry

Post by tokioyoyo » Tue, Mar 31, 2026, 10:11 AM UTC

q3k wrote: post #9

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

Post by Overpower0416 » Tue, Mar 31, 2026, 10:12 AM UTC

Insensitivity wrote: post #17

loevborg wrote: post #14

Earlier quoted context omitted.

Can you give an example? Looks fairly decent to me

the "useCanUseTool.tsx" hook, is definitely something I would hate seeing in any code base I come across. It's extremely nested, it's basically an if statement soup `useTypeahead.tsx` is even worse, extremely nested, a ton of "if else" statements, I doubt you'd look at it and think this is sane code

  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;
    }
  }

Post by darkstar_16 » Tue, Mar 31, 2026, 10:13 AM UTC

loevborg wrote: post #27

q3k wrote: post #21

Earlier quoted context omitted.

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.

You're right about process.argv - wow, that looks like a maintenance and testability nightmare.

Post by isodev » Tue, Mar 31, 2026, 10:15 AM UTC

Post by matltc » Tue, Mar 31, 2026, 10:17 AM UTC

Insensitivity wrote: post #17

loevborg wrote: post #14

Earlier quoted context omitted.

Can you give an example? Looks fairly decent to me

the "useCanUseTool.tsx" hook, is definitely something I would hate seeing in any code base I come across. It's extremely nested, it's basically an if statement soup `useTypeahead.tsx` is even worse, extremely nested, a ton of "if else" statements, I doubt you'd look at it and think this is sane code