# Optimism monorepo contributing guide

**Please read our [general contributing guide](https://github.com/ethereum-optimism/.github/blob/master/CONTRIBUTING.md) before continuing**


These packages only require 1 reviewer (all other packages require 2 reviewers, unless the changes do not affect production or test code).
- packages/core-utils
- packages/hardhat-ovm
- packages/common-ts
- integration-tests


