hardhat/src/internal/cli/constants.ts

Hardhat is an extensible developer tool that helps smart contract developers increase productivity by reliably bringing together the tools they want.

// TODO: Remove 18 on June 30, 2025
export const SUPPORTED_NODE_VERSIONS = [
  "^18.0.0",
  "^20.0.0",
  "^22.0.0",
  "^24.0.0",
];