The testing engine lives in munk-test/.
Install, usage, and the source layout are in munk-test/README.md. Commands in that file run from inside munk-test/.
Build from a checkout of this repository:
cd munk-test
python3 scripts/update_uv_locks.py
python3 scripts/bootstrap_standalone_dev.py --force
./dist/runtime-dev/bin/munk doctorLicense: Apache-2.0.