For some usecases it would be beneficial to supply the helper classes and byteman rule scripts in a single jar and access the scripts from the jar using a jar url. I have a PR that provides this feature, and this snippet from the test illustrates the configuration syntax:

javaagent:byteman-agent.jar=script:jar:file://target/byteman-agent-tests.jar!/scripts/jar/TestScriptFromJar.btm