Languages, types and runtimes for projects built with AI agents
TypeScript, type checkers, runners. 18 tools ranked by how many of 12,697 public projects built with AI coding agents use them, with downloads and GitHub stars. Updated Oct 10, 2026.
| Tool | Used in agent projects | Downloads / wk | GitHub stars | License |
|---|---|---|---|---|
| TypeScript npm Language for application-scale JavaScript development with static type checking. |
7,092 (55.9%) | 305M | 111K | Apache-2.0 |
| tsx npm Node.js enhanced with esbuild to run TypeScript and ESM files. |
1,262 (9.9%) | 96.8M | 12.2K | MIT |
| ts-node npm TypeScript execution environment for Node.js with source map support. |
865 (6.8%) | 45.6M | 13.1K | MIT |
| vue-tsc npm TypeScript type checker for Vue.js single-file components. |
111 (0.9%) | 6.5M | 6,724 | MIT |
| tsconfig-paths npm Module resolution utility that loads Node.js modules according to TypeScript path mappings. |
86 (0.7%) | 113M | 1,908 | MIT |
| Cloudflare Workers Types npm TypeScript type definitions for Cloudflare Workers runtime. |
84 (0.7%) | 12.1M | 8,888 | MIT OR Apache-2.0 |
| jiti npm Runtime TypeScript and ESM support for Node.js without build steps. |
84 (0.7%) | 19M | 2,973 | MIT |
| CFFI pypi Foreign Function Interface for calling C code from Python. |
84 (0.7%) | 248M | 280 | — |
| pycparser pypi C language parser written in pure Python for language tools. |
83 (0.7%) | 23M | 3,575 | — |
| mypy pypi Optional static type checker for Python enabling better code quality and IDE support. |
60 (0.5%) | 43.3M | 20.7K | — |
| type-fest npm Collection of essential TypeScript utility types for common patterns. |
36 (0.3%) | 387M | 17.4K | (MIT OR CC0-1.0) |
| core-js npm Modular polyfill library for ES2015+ features in JavaScript. |
35 (0.3%) | 69.1M | 25.5K | MIT |
| ts-morph npm TypeScript compiler wrapper for static analysis and programmatic code manipulation. |
25 (0.2%) | 30.5M | 6,200 | MIT |
| parso pypi Python parser library for syntax analysis and AST generation. |
23 (0.2%) | 23.4M | 679 | MIT |
| Effect npm TypeScript library providing functional programming utilities and effects system for production-grade software. |
22 (0.2%) | 44.6M | 17.2K | MIT |
| OpenAPI TypeScript npm Generate TypeScript types from OpenAPI 3.0 and 3.1 schemas automatically. |
21 (0.2%) | 9.1M | 8,396 | MIT |
| TypeScript Reset npm Improves TypeScript's built-in type definitions for common JavaScript APIs with better defaults. |
20 (0.2%) | 1.2M | 8,614 | MIT |
| sumtypes pypi Algebraic types for Python providing sum types and tagged unions. |
20 (0.2%) | 34.2K | 44 | MIT |
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