diff --git a/src/types.ts b/src/types.ts
new file mode 100644
index 0000000..764495b
--- /dev/null
+++ b/src/types.ts
@@ -0,0 +1,69 @@
+export interface RossUltrixState {
+  connected: boolean;
+  panels: Record<string, PanelStatus>;
+  inputs: Record<string, InputStatus>;
+  lastUpdate: Date;
+}
+
+export interface PanelStatus {
+  id: string;
+  active: boolean;
+  mixEffect?: string;
+  lastUpdate: Date;
+}
+
+export interface InputStatus {
+  id: string;
+  name: string;
+  live: boolean;
+  preview: boolean;
+  lastUpdate: Date;
+}
+
+export interface RossTalkConfig {
+  host: string;
+  port: number;
+  onStateChange?: (state: Partial<RossUltrixState>) => void;
+}
+
+export interface RossCommand {
+  type: 'take' | 'auto' | 'preview' | 'program' | 'panel' | 'macro' | 'status';
+  target?: string;
+  parameters?: Record<string, any>;
+}
+
+export interface RossSource {
+  id: string;
+  name: string;
+  type: 'camera' | 'media' | 'cg' | 'aux' | 'color' | 'test';
+  available: boolean;
+}
+
+export interface RossPanel {
+  id: string;
+  name: string;
+  active: boolean;
+  mixEffect?: string;
+  type: 'me' | 'aux' | 'dsk';
+}
+
+export interface RossMacro {
+  id: string;
+  name: string;
+  description?: string;
+  parameters?: Record<string, any>;
+}
+
+export interface RossTransition {
+  type: 'cut' | 'mix' | 'dip' | 'wipe';
+  duration?: number;
+  parameters?: Record<string, any>;
+}
+
+export interface RossMixEffect {
+  id: string;
+  program: string | null;
+  preview: string | null;
+  transition: RossTransition;
+  inTransition: boolean;
+}