first commit

backend/app/domain/keys.py

@@ -0,0 +1,17 @@
+from __future__ import annotations
+
+import time
+
+
+def _timestamp_ms() -> str:
+    return str(int(time.time() * 1000))
+
+
+def generate_experiment_key() -> str:
+    """Generate a system-managed experiment key, e.g. EX1742601234567."""
+    return f"EX{_timestamp_ms()}"
+
+
+def generate_variant_key() -> str:
+    """Generate a system-managed variant key, e.g. VA1742601234567."""
+    return f"VA{_timestamp_ms()}"