diff --git a/src/observability/analytics/types.ts b/src/observability/analytics/types.ts
new file mode 100644
index 00000000..b11aa281
--- /dev/null
+++ b/src/observability/analytics/types.ts
@@ -0,0 +1,27 @@
+// Ownership: src/observability/analytics/ is owned by Phase 1 sub-plan 1G-analytics.
+// This type-only seed exists because Phase 1A-1's Env depends on AnalyticsProviders.
+// Sub-plan 1G-analytics extends this file with the facade and adapter implementations.
+
+export interface AnalyticsProviders {
+  metrica: boolean;
+  ctm: boolean;
+  variocube: boolean;
+  dynatrace: boolean;
+}
+
+export interface AnalyticsProps {
+  [key: string]: unknown;
+}
+
+export interface AnalyticsEvent {
+  kind: "track" | "page";
+  name: string;
+  props: AnalyticsProps;
+  provider: "metrica" | "ctm" | "variocube" | "dynatrace";
+  ts: string;
+}
+
+export interface Analytics {
+  track(event: string, props?: AnalyticsProps): void;
+  page(url: string, props?: AnalyticsProps): void;
+}