How do I install the Hardhat skill?

Run npx skillmds@latest add hairyf/hardhat in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Hardhat safe to use?

This skill has not completed SkillMD's automated safety review yet. Capability flags: makes network calls. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Hardhat?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Hardhat free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Hardhat?

hairyf (@hairyf) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Hardhat by hairyf — Agent Skill

Name: Hardhat
Rating: 4.666666666666667 (3 reviews)
Author: hairyf

File contents

Skill based on Hardhat (NomicFoundation/hardhat), generated 2026-02-09. Official docs: https://hardhat.org/docs

Hardhat is an Ethereum development environment: task runner (compile, test, run, node), built-in Hardhat Network, Hardhat Ignition for declarative deployment, and plugins (toolbox ethers/viem, Chai matchers, verify, etc.).

Core References

Topic	Description	Reference
Getting started	Init, tasks, compile/test/deploy flow	core-getting-started
Configuration	hardhat.config, networks, solidity, paths, mocha	core-config
HRE	Hardhat Runtime Environment, network, artifacts, config	core-hre
Compiler config	Solidity version, optimizer, viaIR, settings	core-compiler-config
Build profiles	default vs production, --build-profile, solidity.profiles	core-build-profiles
Config variables	configVariable, keystore, secrets, env	core-config-variables
Tasks and plugins	HRE, tasks, plugins, creating tasks	core-tasks-plugins

Features

Topic	Description	Reference
Hardhat Network	In-process vs node, JSON-RPC, forking, network helpers	features-network
Hardhat Ignition	Declarative deployment, buildModule, Future, deploy	features-ignition
Deployment overview	Ignition vs scripts, network and keystore setup	features-deployment-overview
Deployment scripts	viem/ethers deploy in scripts, hardhat run, --build-profile	features-deployment-scripts
Multichain	Chain types (l1, op), --chain-type, network.connect chainType	features-multichain
Testing	loadFixture, Chai matchers, network helpers	features-testing
Testing (Viem + node:test)	hre.network.connect, viem assertions, network helpers	features-testing-viem
Solidity tests	.t.sol, setUp, fuzz, forge-std, cheatcodes	features-testing-solidity
Code coverage	--coverage, LCOV, HTML report	features-testing-coverage
Gas statistics	--gas-stats, per-function and deployment gas	features-testing-gas-stats
Toolbox and verify	Ethers vs Viem toolbox, contract verification	features-toolbox-verify

Advanced

Topic	Description	Reference
Cheatcodes	vm.prank, time, and other Solidity test cheatcodes	advanced-cheatcodes

External Links

---name: hardhatdescription: Hardhat — Ethereum development environment (Runner, Network, Ignition, config, tasks, plugins, testing, deployment).---> Skill based on Hardhat (NomicFoundation/hardhat), generated 2026-02-09. Official docs: https://hardhat.org/docsHardhat is an Ethereum development environment: task runner (compile, test, run, node), built-in Hardhat Network, Hardhat Ignition for declarative deployment, and plugins (toolbox ethers/viem, Chai matchers, verify, etc.).## Core References| Topic | Description | Reference ||-------|-------------|-----------|| Getting started | Init, tasks, compile/test/deploy flow | [core-getting-started](references/core-getting-started.md) || Configuration | hardhat.config, networks, solidity, paths, mocha | [core-config](references/core-config.md) || HRE | Hardhat Runtime Environment, network, artifacts, config | [core-hre](references/core-hre.md) || Compiler config | Solidity version, optimizer, viaIR, settings | [core-compiler-config](references/core-compiler-config.md) || Build profiles | default vs production, --build-profile, solidity.profiles | [core-build-profiles](references/core-build-profiles.md) || Config variables | configVariable, keystore, secrets, env | [core-config-variables](references/core-config-variables.md) || Tasks and plugins | HRE, tasks, plugins, creating tasks | [core-tasks-plugins](references/core-tasks-plugins.md) |## Features| Topic | Description | Reference ||-------|-------------|-----------|| Hardhat Network | In-process vs node, JSON-RPC, forking, network helpers | [features-network](references/features-network.md) || Hardhat Ignition | Declarative deployment, buildModule, Future, deploy | [features-ignition](references/features-ignition.md) || Deployment overview | Ignition vs scripts, network and keystore setup | [features-deployment-overview](references/features-deployment-overview.md) || Deployment scripts | viem/ethers deploy in scripts, hardhat run, --build-profile | [features-deployment-scripts](references/features-deployment-scripts.md) || Multichain | Chain types (l1, op), --chain-type, network.connect chainType | [features-multichain](references/features-multichain.md) || Testing | loadFixture, Chai matchers, network helpers | [features-testing](references/features-testing.md) || Testing (Viem + node:test) | hre.network.connect, viem assertions, network helpers | [features-testing-viem](references/features-testing-viem.md) || Solidity tests | .t.sol, setUp, fuzz, forge-std, cheatcodes | [features-testing-solidity](references/features-testing-solidity.md) || Code coverage | --coverage, LCOV, HTML report | [features-testing-coverage](references/features-testing-coverage.md) || Gas statistics | --gas-stats, per-function and deployment gas | [features-testing-gas-stats](references/features-testing-gas-stats.md) || Toolbox and verify | Ethers vs Viem toolbox, contract verification | [features-toolbox-verify](references/features-toolbox-verify.md) |## Advanced| Topic | Description | Reference ||-------|-------------|-----------|| Cheatcodes | vm.prank, time, and other Solidity test cheatcodes | [advanced-cheatcodes](references/advanced-cheatcodes.md) |## External Links- [Hardhat docs](https://hardhat.org/docs)- [Hardhat Runner](https://hardhat.org/hardhat-runner)- [Hardhat Network](https://hardhat.org/hardhat-network/docs)- [Hardhat Ignition](https://hardhat.org/ignition/docs)- [NomicFoundation/hardhat](https://github.com/NomicFoundation/hardhat)

Frequently asked questions

Hardhat