setup-solidity-contracts: Workflow Automation for AI Agents | OpenAgentSkill

Overview

Set up a Solidity smart contract project with OpenZeppelin Contracts. Use when users need to: (1) create a new Hardhat or Foundry project, (2) install OpenZeppelin Contracts dependencies for Solidity, (3) configure remappings for Foundry, or (4) understand Solidity import conventions for OpenZeppelin.

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Solidity Setup

For existing projects, detect the framework by looking for hardhat.config.* (Hardhat) or foundry.toml (Foundry). For new projects, ask the user which framework they prefer.

Hardhat Setup

Initialize project (only if starting a new project)

npx hardhat init        # Hardhat v2
npx hardhat --init      # Hardhat v3

Install OpenZeppelin Contracts:

npm install @openzeppelin/contracts

If using upgradeable contracts, also install the upgradeable variant:

npm install @openzeppelin/contracts-upgradeable

Foundry Setup

Install Foundry

curl -L https://foundry.paradigm.xyz | bash
foundryup

Initialize project (only if starting a new project)

forge init my-project
cd my-project

Add OpenZeppelin Contracts:

forge install OpenZeppelin/openzeppelin-contracts@v<VERSION>

If using upgradeable contracts, also add the upgradeable variant:

forge install OpenZeppelin/openzeppelin-contracts-upgradeable@v<VERSION>

Look up the current version from https://github.com/OpenZeppelin/openzeppelin-contracts/releases. Pin to a release tag — without one, forge install pulls the default branch, which may be unstable.

remappings.txt (if not using upgradeable contracts)

@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/

remappings.txt (if using upgradeable contracts)

@openzeppelin/contracts/=lib/openzeppelin-contracts-upgradeable/lib/openzeppelin-contracts/contracts/
@openzeppelin/contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/contracts/

Note The above remappings mean that both @openzeppelin/contracts/ (including proxy contracts) and @openzeppelin/contracts-upgradeable/ come from the openzeppelin-contracts-upgradeable submodule and its subdirectories, which includes its own transitive copy of openzeppelin-contracts of the same release version number. This format is needed for Etherscan verification to work. Particularly, any copies of openzeppelin-contracts that are installed separately are NOT used.

Import Conventions

Standard: @openzeppelin/contracts/token/ERC20/ERC20.sol
Upgradeable: @openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol
Use upgradeable variants only when deploying behind proxies; otherwise use standard contracts.

View source ↗

File metadata

name: setup-solidity-contracts
description: "Set up a Solidity smart contract project with OpenZeppelin Contracts. Use when users need to: (1) create a new Hardhat or Foundry project, (2) install OpenZeppelin Contracts dependencies for Solidity, (3) configure remappings for Foundry, or (4) understand Solidity import conventions for OpenZeppelin."
license: AGPL-3.0-only
metadata:
  author: OpenZeppelin

View original text

---
name: setup-solidity-contracts
description: "Set up a Solidity smart contract project with OpenZeppelin Contracts. Use when users need to: (1) create a new Hardhat or Foundry project, (2) install OpenZeppelin Contracts dependencies for Solidity, (3) configure remappings for Foundry, or (4) understand Solidity import conventions for OpenZeppelin."
license: AGPL-3.0-only
metadata:
  author: OpenZeppelin
---

# Solidity Setup

For existing projects, detect the framework by looking for `hardhat.config.*` (Hardhat) or `foundry.toml` (Foundry). For new projects, ask the user which framework they prefer.

## Hardhat Setup

- Initialize project (only if starting a new project)

```bash
npx hardhat init        # Hardhat v2
npx hardhat --init      # Hardhat v3
```

- Install OpenZeppelin Contracts:

```bash
npm install @openzeppelin/contracts
```

- If using upgradeable contracts, also install the upgradeable variant:

```bash
npm install @openzeppelin/contracts-upgradeable
```

## Foundry Setup

- Install Foundry

```bash
curl -L https://foundry.paradigm.xyz | bash
foundryup
```

- Initialize project (only if starting a new project)

```bash
forge init my-project
cd my-project
```

- Add OpenZeppelin Contracts:

```bash
forge install OpenZeppelin/openzeppelin-contracts@v<VERSION>
```

- If using upgradeable contracts, also add the upgradeable variant:

```bash
forge install OpenZeppelin/openzeppelin-contracts-upgradeable@v<VERSION>
```

> Look up the current version from https://github.com/OpenZeppelin/openzeppelin-contracts/releases. Pin to a release tag — without one, `forge install` pulls the default branch, which may be unstable.

- `remappings.txt` (if not using upgradeable contracts)

```text
@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/
```

- `remappings.txt` (if using upgradeable contracts)

```text
@openzeppelin/contracts/=lib/openzeppelin-contracts-upgradeable/lib/openzeppelin-contracts/contracts/
@openzeppelin/contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/contracts/
```

> **Note**
> The above remappings mean that both `@openzeppelin/contracts/` (including proxy contracts) and `@openzeppelin/contracts-upgradeable/` come from the `openzeppelin-contracts-upgradeable` submodule and its subdirectories, which includes its own transitive copy of `openzeppelin-contracts` of the same release version number. This format is needed for Etherscan verification to work. Particularly, any copies of `openzeppelin-contracts` that are installed separately are NOT used.

## Import Conventions

- Standard: `@openzeppelin/contracts/token/ERC20/ERC20.sol`
- Upgradeable: `@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol`
- Use upgradeable variants only when deploying behind proxies; otherwise use standard contracts.

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Quality score needs review
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License: AGPL-3.0-only
Version: 1.0.0
Last GitHub push: Sep 1, 2026
Registry updated: Sep 6, 2026
Instruction path: skills/setup-solidity-contracts/SKILL.md @ 6f215af60eb6

Version reported in registry metadata; check source releases before relying on it.

Quality

70/100

Strong

Trust

66/100

Sandbox only

Audit

79/100

Needs review

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