Use it now
Plugin session.messages and session.send can now target a specific agent via an agentId/as parameter
What
The plugin host operations $.session.messages and $.session.send now accept an optional {agentId, as} argument, where as must be "api" if it's given at all. Passing this lets a caller scope the call to a particular agent within a session, instead of always operating on the whole session.
Why
This lets plugins and SDK integrations work with the messages or output of one specific agent rather than the entire session, which matters when a session involves multiple agents.
Names in the bundleagentId