Summary
Roberto Stagi, CTO and co-founder of Ratel and EU ambassador for the AI Pratic community, delivers a structured argument at AI Engineer that TypeScript is quietly winning the language war for AI application development — not by displacing Python in research or infrastructure, but by taking over the application layer where AI is now being shipped.
The evidence Stagi presents is concrete: in August 2025, TypeScript overtook Python as the most-used language on GitHub, and GitHub’s own report attributed both Python’s 2024 rise and TypeScript’s 2025 rise to the same cause — AI adoption. The difference is that 2025’s wave was driven by coding agents like Cursor, Claude Code, and Codex, which defaulted to TypeScript for new application scaffolding. Stagi also points to Anthropic’s acquisition of the Bun JavaScript runtime in December as a signal of investment in the TypeScript ecosystem by a leading AI lab.
On the practical side, Stagi outlines why TypeScript makes architectural sense for agentic applications: npm provides the richest package ecosystem for authentication, payments, and UI; TypeScript enables a single codebase across the agent loop, backend, and frontend; and end-to-end consistent typing eliminates the contract-synchronization problem that arises when maintaining a Python service alongside a separate React application. The talk is framed as an honest assessment from a self-described long-time TypeScript developer who still credits Python with owning the training and research layer.
📺 Source: AI Engineer · Published July 12, 2026
🏷️ Format: Opinion Editorial
