TypeScript Is the New Assembly Language — What the Claude Code 600K-Line Source Leak Reveals About AI-Written Code

After analyzing the leaked Claude Code source, SemiAnalysis dropped a bombshell: TypeScript is no longer a language humans write — it is a language AI produces, consumes, and evolves. From a three-layer memory architecture to the autonomous agent mode KAIROS, from security holes to the new role of static types, this post breaks down what 600,000 leaked lines actually reveal.