H-3: the node-engine says composed, running and capabilities-changed on the seat's subjects

Builds: design 47 G §260, §227, §226, §177, §309, §404

Claude-Session: https://claude.ai/code/session_01JG73KEq4zoDfM9WtYpcQgZ

cmd/mesh-host/nodeagent.go

@@ -656,8 +656,9 @@ func nodeAgent(ctx context.Context, opts options, signer ed25519.PublicKey, trus
 		// composition bucket) is never applied. While the seat's assignment holds no key for this node it composes
 		// nothing and keeps running what it runs; a assignment it cannot watch stops the agent, said, and it begins again.
 		composer := selfComposer(session, node, hooks, say)
-		machinesNow.Store(composer) // the machines a failing network part points at, by the assignments (issue 774)
-		composerNow.Store(composer) // what the verb compose asks a pass of, this run's alone
+		machinesNow.Store(composer)                // the machines a failing network part points at, by the assignments (issue 774)
+		composerNow.Store(composer)                // what the verb compose asks a pass of, this run's alone
+		session.SetManifestOf(composer.ManifestOf) // the event running names the manifest of the build that runs
 		env.Composed, env.SelfComposed, env.Policy, env.ComposedToday = composer, true, composer.Policy, composer.ComposedToday
 		env.WhyUnmade, env.Waiting = composer.WhyUnmade, composer.Waiting
 		env.HoldsData = composer.HoldsData // what runs from the kept declaration says Data as its manifest does
@@ -670,6 +671,7 @@ func nodeAgent(ctx context.Context, opts options, signer ed25519.PublicKey, trus
 		cancel()
 		current.set(nil)
 		composerNow.Store(nil)
+		session.SetManifestOf(nil)
 		shadowNow.Store(nil)
 		if ctx.Err() != nil {
 			return
@@ -1076,6 +1078,8 @@ func selfComposer(session *link.Session, node string, hooks composerHooks, say f
 	// And every composition it makes in its composition state composed-<node>, a record the provisioner, the assigner
 	// and the view read and nothing applies (novox/hq ADR 0593 §6).
 	env.ComposedState = link.EngineComposed{Session: session, Node: node}
+	// And each composition it writes there said as the seat's event composed, which the assigner waits on.
+	env.SayComposed = session.SayComposed
 	return selfcompose.New(env)
 }