Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
MessagingArea: what it touches
Internal ChangesKind: in v2.1.280,
Internal ChangesSection of the release
What
Messages passed between agents or sessions already carried tags like from, from-session, hop-chain, from-name, and from-mode. They now support an additional optional from-plugin="..." attribute, which Claude Code parses into a fromPlugin field.
Why
This lets a receiving agent know which plugin originated a message, which matters when multiple plugins are sending messages into the same conversation.
