Initialize the contracts subdirectory

1. Navigate to the contracts subdirectory:

cd packages/contracts

1. Initialize a project with sforge :

sforge init --no-commit && rm -rf .github

This command will:

• Create the contract project structure (e.g., src/ , test/, foundry.toml).

• Automatically install the Forge standard library (forge-std ) as a submodule.

• Remove the .github workflow folder (not required)

1. Edit the .gitignore file to be the following:

.env
broadcast/
cache/

1. Delete the default contract, test and script files (Counter.sol and Counter.t.sol and Counter.s.sol ) and replace them with their Walnut counterparts (Walnut.sol , Walnut.t.sol and Walnut.s.sol ):

# Remove the Counter files
rm -f src/Counter.sol test/Counter.t.sol script/Counter.s.sol

# Create empty Walnut files in the same locations
touch src/Walnut.sol test/Walnut.t.sol script/Walnut.s.sol

These files are empty for now, but we will add to them as we go along.