I'm a bit confused by the osquery thrift definitions... Why does

ExtensionManager

extend

Extension

(https://github.com/facebook/osquery/blob/master/osquery.thrift#L76)? It looks like

Extension

is the API that an extension should expose, while

ExtensionManager

is the API that

osqueryd

should expose. Can extensions

call()

other extensions through

osqueryd

? If not, it looks like the only shared functionality is

ping()

.