Reproducible install (don’t edit llm_harness here)

uv add "llm_harness @ git+https://github.com/teron131/llm-harness.git"
uv sync

Editable install in the same repo (submodule)

git submodule add https://github.com/teron131/llm-harness.git llm-harness
uv add --editable ./llm-harness
uv sync

Fresh clone other_repo with submodule

git clone --recurse-submodules <other_repo-url>
uv sync

Already cloned other_repo with submodule

git submodule update --init
uv sync