Gemforge fails to build when OpenZeppelin is added as a submodule

[Enceladus-py]

Problem

When OpenZeppelin is added using git submodules instead of the npm package, gemforge build triggers Hardhat to compile all .sol files inside the submodule, including:

• certora/harnesses/
• lib/forge-std/
• test mocks (test/**)
• non-existent patched imports

These folders contain verification harnesses and Foundry test utilities, which Hardhat cannot compile.

This results in errors such as:

• Error HHE902: The file .../certora/patched/governance/TimelockController.sol doesn't exist
• Error HHE902: The package "ds-test" is not installed
• Error HHE902: There was an error while resolving the import "truffle/Assert.sol"

Environment

• Gemforge version: 2.0.0
• Hardhat version: 3.0.16
• OpenZeppelin version: 4.9.2 (submodule)
• Node.js version: 23.5.0
• OS: macOS

How to reproduce

• gemforge scaffold --hardhat --folder /path/to/new_or_empty_folder
• cd /path/to/new_or_empty_folder
• gemforge build

Workaround

I manually deleted the problematic folders inside the OpenZeppelin submodule:

• rm -rf lib/openzeppelin-contracts/test
• rm -rf lib/openzeppelin-contracts/lib
• rm -rf lib/openzeppelin-contracts/certora