Developer ports TypeScript compiler to Rust with AI for $24,000

YouTuber Theo Browne used AI agents to port Microsoft's TypeScript compiler to Rust, spending about $24,000 in Claude Opus 5.5 tokens. The TS_Rust port passes TypeScript conformance tests at nearly 100% and reportedly runs twice as fast as Microsoft's official Go rewrite (v7) and 12.5 times faster than TypeScript v6.

• TS_Rust passes TypeScript conformance tests at nearly 100% accuracy
• Claimed speed: 2x faster than Microsoft's Go version and 12.5x faster than v6
• Claude Opus 5.5 tokens cost about $24,000; earlier GPT attempt burned $400,000
• Rust's lack of a garbage collector eases running agents in V8 instead of VMs