diff --git a/engine.go b/engine.go
index e2e1f8e..a061965 100644
--- a/engine.go
+++ b/engine.go
@@ -11,14 +11,13 @@ import (
 
 type Engine struct {
 	db        *gorm.DB
-	channels  map[string]*reactivity.Channel
 	mutations map[string]func(ctx *MutationCtx) error
 	queries   map[string]func(ctx *QueryCtx) error
 }
 
 func NewEngine(db *gorm.DB) *Engine {
 	slog.SetLogLoggerLevel(slog.LevelDebug)
-	return &Engine{db: db, channels: make(map[string]*reactivity.Channel), mutations: make(map[string]func(ctx *MutationCtx) error), queries: make(map[string]func(ctx *QueryCtx) error)}
+	return &Engine{db: db, mutations: make(map[string]func(ctx *MutationCtx) error), queries: make(map[string]func(ctx *QueryCtx) error)}
 }
 
 func (e *Engine) RegisterMutation(name string, mutation func(ctx *MutationCtx) error) {
diff --git a/reactivity/tracker.go b/reactivity/tracker.go
index d148453..43e4805 100644
--- a/reactivity/tracker.go
+++ b/reactivity/tracker.go
@@ -2,12 +2,22 @@ package reactivity
 
 import "github.com/gorilla/websocket"
 
-type Subscription struct {
-	ID   string
-	Conn *websocket.Conn
+// TODO: populate with needed structures for tracking state
+type Tracker struct {
 }
 
-type Channel struct {
-	ID            string
-	Subscriptions []*Subscription
+func NewTracker() *Tracker {
+	return &Tracker{}
+}
+
+func (t *Tracker) Track(conn *websocket.Conn) {}
+
+func (t *Tracker) Untrack(conn *websocket.Conn) {}
+
+func (t *Tracker) SubscribeToQuery(query string) {}
+
+func (t *Tracker) UnsubscribeFromQuery(query string) {}
+
+func (t *Tracker) GetQuerySubscriptions() []string {
+	return []string{}
 }