@julian @silverpill @trwnh @erincandescent @mikedev @jenniferplusplus@hachyderm.io obviously `context` isn't good enough to identify the thread relationship. Trying to hijack it is contrary to the AS2 spec and common interoperability. One proposal tries to specify it by duck-typing every object; the other by defining a new Collection type. The clearest way to define the relationship is with a property, `thread`, which is specific, clear, and requires no other changes.