foundry

name	foundry
description	Foundry — Forge, Cast, Anvil, Chisel; EVM tooling, cheatcodes, scripting, lint, debugging.
metadata	{"author":"hairy","version":"2026.2.9","source":"Generated from https://github.com/foundry-rs/foundry, scripts located at https://github.com/antfu/skills"}

Skill based on Foundry (foundry-rs/foundry), generated 2026-02-09. User docs: https://getfoundry.sh, book: https://book.getfoundry.sh

Foundry is a fast, portable Ethereum dev toolkit (Rust): Forge (build, test, fuzz, deploy), Cast (EVM interaction), Anvil (local node), Chisel (Solidity REPL). This skill focuses on agent capabilities — architecture, cheatcodes, scripting, debugging, custom networks, and the linter — from the in-repo dev docs.

Core References

Topic	Description	Reference
Architecture	evm, config, cli crates; where cheatcodes and CLI live	core-architecture
Cheatcodes	Vm address, Inspector, adding cheatcodes, Cheatcode trait, JSON spec	core-cheatcodes
Config	foundry.toml, profiles, compiler, paths, remappings	core-config
Project layout	forge init, src, test, script, lib	core-project-layout

Features

Topic	Description	Reference
Forge build & test	forge build, forge test, snapshot, gas report, fuzz	features-forge-build-test
Forge fmt	forge fmt, [fmt] config, --check	features-forge-fmt
Contract size	forge build --sizes, 24KB limit	features-contract-size
Forge install	forge install, remappings, lib layout	features-forge-install
Scripting	forge script flow, broadcast, resume, nonce, multi-chain	features-scripting
Testing patterns	vm.prank, expectRevert, expectEmit, forge-std Test	features-testing-patterns
Coverage & verify	forge coverage, forge verify-contract	features-coverage-verify
Invariant testing	invariant_* functions, runs, depth, stateful fuzz	features-invariant
Fork testing	createSelectFork, selectFork, activeFork, multi-fork	features-fork-testing
FFI & signing	vm.ffi, vm.sign, EIP-712 helpers	features-ffi-signatures
State cheatcodes	vm.deal, vm.mockCall, vm.etch	features-state-cheatcodes
Cast	cast call, send, ABI encode/decode, chain queries	features-cast
Anvil	Local node, fork, pre-funded accounts, block time	features-anvil
Chisel	Solidity REPL for snippets and quick checks	features-chisel
Debugging	RUST_LOG, tracing filters for forge/cast/anvil	features-debugging
Custom Networks	Custom precompiles, evm-networks crate	features-networks
Lint (forge lint)	Early/late passes, adding lint rules, testing	features-lint

Best Practices

Topic	Description	Reference
Testing	Test layout, naming, isolation, CI patterns	best-practices-testing
Scripting	Broadcast, verify, resume, keys, multi-chain	best-practices-scripting

External Links

• Foundry Docs
• Foundry Book
• foundry-rs/foundry GitHub
• Cheatcodes reference