diff --git a/providers/session/session.go b/providers/session/session.go
index edad790..8930962 100644
--- a/providers/session/session.go
+++ b/providers/session/session.go
@@ -64,8 +64,8 @@ func (this *Provider) FuncMapFor (document *step.Document) template.FuncMap {
 		sessions: &this.sessions,
 	}
 	return template.FuncMap {
-		"sessionHTTP": stat.funcSessionHTTP,
-		"session":     stat.funcSession,
+		"sessionHTTP":   stat.funcSessionHTTP,
+		"session":       stat.funcSession,
 	}
 }
 
@@ -94,14 +94,17 @@ func (this *state) funcSessionHTTP (
 	} else {
 		expiration = time.Now().Add(this.lifetime)
 	}
-	var result *session
+	var result *Session
 	if session, ok := this.checkSession(id); ok {
 		if this.lifetime != 0 {
 			session.setExpiration(expiration)
 		}
 		result = session
 	} else {
-		session, err := this.startSession(expiration)
+		if id == (uuid.UUID { }) {
+			id = uuid.New()
+		}
+		session, err := this.newSession(id, expiration)
 		if err != nil { return nil, err }
 		result = session
 	}
@@ -114,42 +117,33 @@ func (this *state) funcSessionHTTP (
 	return result, nil
 }
 
-func (this *state) funcSession (id uuid.UUID) (*session, error) {
+func (this *state) funcSession (id uuid.UUID) (*Session, error) {
 	expires := time.Now().Add(this.lifetime)
 	if session, ok := this.checkSession(id); ok {
 		session.setExpiration(expires)
 		return session, nil
 	}
-	return this.startSession(expires)
+	return this.newSession(id, expires)
 }
 
-func (this *state) checkSession (id uuid.UUID) (*session, bool) {
+func (this *state) checkSession (id uuid.UUID) (*Session, bool) {
 	sessions, done := this.sessions.RBorrow()
 	defer done()
 	session, ok := sessions[id]
-	log.Println(ok)
 	if !ok || session.Expired() { return nil, false }
 	return session, true
 }
 
-func (this *state) startSession (expires time.Time) (*session, error) {
-	sessions, done := this.sessions.Borrow()
-	defer done()
-	id := uuid.New()
-	// air defense
-	if _, exists := sessions[id]; exists { return nil, step.ErrPigsFlying }
-	session := &Session {
+func (this *state) newSession (id uuid.UUID, expires time.Time) (*Session, error) {
+	return &Session {
 		parent:  this,
 		id:      id,
 		data:    usync.NewRWLocker(make(map[string] any)),
 		expires: usync.NewRWLocker(expires),
-	}
-	sessions[id] = session
-	log.Println(id)
-	return session, nil
+	}, nil
 }
 
-type sessionMap = map[uuid.UUID] *Session
+type sessionMap map[uuid.UUID] *Session
 
 type Session struct {
 	parent  *state                          // immutable
@@ -172,6 +166,7 @@ func (this *Session) Set (name string, value any) string {
 	data, done := this.data.Borrow()
 	defer done()
 	data[name] = value
+	this.addSelf()
 	return ""
 }
 
@@ -186,17 +181,27 @@ func (this *Session) Clear () string {
 	data, done := this.data.Borrow()
 	defer done()
 	clear(data)
+	this.delSelf()
 	return ""
 }
 
-func (this *Session) Close () (string, error) {
+func (this *Session) String () string {
+	return this.id.String()
+}
+
+func (this *Session) addSelf () (string, error) {
+	sessions, done := this.parent.sessions.Borrow()
+	defer done()
+	sessions[this.id] = this
+	log.Println("ADD", sessions)
+	return "", nil
+}
+
+func (this *Session) delSelf () (string, error) {
 	sessions, done := this.parent.sessions.Borrow()
 	defer done()
-	if _, ok := sessions[this.id]; ok {
-		return "", step.ErrDoubleClose
-	}
 	delete(sessions, this.id)
-	this.Clear()
+	log.Println("DEL", sessions)
 	return "", nil
 }
 
@@ -215,5 +220,5 @@ func (this *Session) setExpiration (expires time.Time) string {
 }
 
 func (this *Session) Expired () bool {
-	return this.Expiration().After(time.Now())
+	return this.Expiration().Before(time.Now())
 }