diff --git a/cmd/cyrene/wire.go b/cmd/cyrene/wire.go
index 6878d3c..60f934f 100644
--- a/cmd/cyrene/wire.go
+++ b/cmd/cyrene/wire.go
@@ -323,7 +323,12 @@ func (a *app) wireRuntime() error {
 	flowPub := loop.NewFlowPublisher(
 		func(subject string, payload any) { _ = a.bus.Publish(context.Background(), subject, payload) },
 		func(sessionID string) bool {
-			return sessionID == history.MainSessionID || strings.HasPrefix(sessionID, history.MainSessionID+":")
+			// Publish the web/main flow graph (web chat + IM owner-private mirror) AND the
+			// autonomous-backthink session, so the backthink page's flow link graph renders
+			// too (design/20 §2). Other isolated channel sessions (sess-xxx) stay filtered.
+			return sessionID == history.MainSessionID ||
+				strings.HasPrefix(sessionID, history.MainSessionID+":") ||
+				sessionID == backthink.DefaultSessionID
 		},
 	)
 	checkpoint, perr := persist.New(context.Background(), a.db, a.log)
diff --git a/internal/services/backthink/backthink.go b/internal/services/backthink/backthink.go
index 705018b..a2b1185 100644
--- a/internal/services/backthink/backthink.go
+++ b/internal/services/backthink/backthink.go
@@ -64,6 +64,11 @@ const (
 	defaultSessionID = "sess-backthink"
 )
 
+// DefaultSessionID is the exported loop.Run session key for an autonomous think. It is
+// exposed so the flow-viz publisher (cmd/cyrene) can also publish the backthink flow
+// graph, which the backthink page and the web-chat flow page both render.
+const DefaultSessionID = "sess-backthink"
+
 // Sentinel errors returned by this package. Use errors.Is to test for them; they
 // are returned directly or wrapped with %w so the underlying cause stays intact.
 var (