tsconfig.test.json existed precisely so a test that does not compile cannot silently be a
test that never ran — and four beds did not compile: two returned strings from test bodies,
two predate GenesisOptions gaining sdkSource, one passed a nullable host binary. All clean;
the gate is now part of launching any bed.
https://claude.ai/code/session_01D6qtiYU3P9jk3pnAXyAFyx