first commit

core/schemas/kvstore.go

@@ -0,0 +1,17 @@
+package schemas
+
+import "time"
+
+// KVStore is a minimal interface for a key-value store used by Bifrost internals.
+// The concrete implementation (e.g. framework/kvstore.Store) is injected by the
+// caller and must satisfy this interface. Passing nil disables KV-backed features.
+type KVStore interface {
+	Get(key string) (any, error)
+	SetWithTTL(key string, value any, ttl time.Duration) error
+	SetNXWithTTL(key string, value any, ttl time.Duration) (bool, error)
+	Delete(key string) (bool, error)
+}
+
+const (
+	DefaultSessionStickyTTL = time.Hour
+)