foundry

Run local Ethereum nodes with Anvil. Use when setting up local development environments, forking mainnet for testing, or running integration tests against a local node.

Interact with EVM chains using Cast CLI. Use when querying blockchain data, sending transactions, calling contracts, or converting between formats. Cast is the Swiss Army knife for chain interaction.

Deploy and verify smart contracts with Foundry. Use when deploying contracts, writing deployment scripts, verifying on block explorers, or managing multi-chain deployments.

Property-based testing with Foundry's fuzzer. Use when writing fuzz tests, invariant tests, or testing edge cases. Covers fuzz test structure, input constraints, fixtures, and invariant testing patterns.

Write and run Solidity tests with Foundry. Use when writing unit tests, integration tests, or debugging test failures. Covers test structure, assertions, cheatcodes, and running tests with forge test.

Set up and configure Foundry projects. Use when initializing new projects, configuring foundry.toml, managing dependencies, or structuring Solidity codebases.