diff --git a/session/session.go b/session/session.go
index eb99d96..7a158f4 100644
--- a/session/session.go
+++ b/session/session.go
@@ -1,31 +1,25 @@
 // Package session builds the session/ file tree for the 9P namespace.
-// The tree IS the session collection — sessions are mounted children.
-// No manager, no store. Package functions for lifecycle.
+// The tree IS the session collection — rootState holds the sessions map.
+// Package functions for lifecycle, lookup, and enumeration.
 package session
 
 import (
 	"olliesrv/fs"
 )
 
-// Get returns the Session mounted at id, or nil.
+// Get returns the Session for id, or nil.
 func Get(root *fs.Tree, id string) *Session {
-	child := root.Child(id)
-	if child == nil {
-		return nil
-	}
-	if sess, ok := child.Data.(*Session); ok {
-		return sess
-	}
-	return nil
+	return Lookup(root, id)
 }
 
-// All returns all mounted sessions.
+// All returns all active sessions.
 func All(root *fs.Tree) []*Session {
-	var sessions []*Session
-	for _, child := range root.Children() {
-		if sess, ok := child.Data.(*Session); ok {
-			sessions = append(sessions, sess)
-		}
+	rs := state(root)
+	rs.mu.RLock()
+	defer rs.mu.RUnlock()
+	sessions := make([]*Session, 0, len(rs.sessions))
+	for _, sess := range rs.sessions {
+		sessions = append(sessions, sess)
 	}
 	return sessions
 }