Package harness contains basic reusable test harness components, without any domain-specific logic.

Package ldtest contains a test runner framework that is similar to Go's testing package, but is run as regular Go application code rather than Go tests.

Package opt provides the generic Maybe type for representing optional values without pointers.

CapturingLogger is used internally to record all output from a test scope.

Capabilities is a type alias for a list of strings representing test service capabilities.