Foundry is a fast Solidity development toolkit written in Rust. It includes forge (build, test, deploy), cast (CLI for interacting with contracts), anvil (local testnet node), and chisel (Solidity REPL).

• Foundry Book — official documentation
• GitHub repository
• forge-std — standard library for tests and scripts
• Foundry Broadcast — how startBroadcast/stopBroadcast works in deploy scripts