diff --git a/artifact.001/src/artifact_001/cli.py b/artifact.001/src/artifact_001/cli.py
new file mode 100644
index 0000000..1b02b9d
--- /dev/null
+++ b/artifact.001/src/artifact_001/cli.py
@@ -0,0 +1,56 @@
+import argparse
+from datetime import datetime
+from artifact_001 import core
+
+
+def _parse_args() -> argparse.Namespace:
+    parser = argparse.ArgumentParser(
+        description="CLI zur Erfassung eines aux=3 Messwerts und Logging als JSON-Eintrag."
+    )
+    parser.add_argument("--timestamp", required=True, help="Zeitpunkt der Messung im ISO-Format.")
+    parser.add_argument("--measured_p", required=True, type=float, help="Gemessener p-Wert.")
+    parser.add_argument(
+        "--freeze_ok", required=True, type=str, choices=["true", "false"], help="Gating-Ergebnis als true/false."
+    )
+    parser.add_argument(
+        "--setup_fingerprint", required=True, type=str, help="Fingerprint der Mess-Setup-Konfiguration."
+    )
+    parser.add_argument("--policy_hash", required=True, type=str, help="Hash der verwendeten Policy.")
+    return parser.parse_args()
+
+
+def main() -> None:
+    args = _parse_args()
+
+    # Input validation
+    try:
+        timestamp = datetime.fromisoformat(args.timestamp)
+    except ValueError as exc:
+        raise SystemExit(f"Ungültiges Zeitformat: {args.timestamp}") from exc
+
+    freeze_ok_str = args.freeze_ok.strip().lower()
+    if freeze_ok_str not in ("true", "false"):
+        raise SystemExit("Ungültiger Wert für --freeze_ok: Muss 'true' oder 'false' sein.")
+    freeze_ok = freeze_ok_str == "true"
+
+    measured_p = args.measured_p
+    setup_fingerprint = args.setup_fingerprint.strip()
+    policy_hash = args.policy_hash.strip()
+
+    # CI readiness checks
+    assert isinstance(measured_p, float), "measured_p muss float sein"
+    assert isinstance(freeze_ok, bool), "freeze_ok muss bool sein"
+    assert setup_fingerprint, "setup_fingerprint darf nicht leer sein"
+    assert policy_hash, "policy_hash darf nicht leer sein"
+
+    core.log_measurement(
+        timestamp=timestamp,
+        measured_p=measured_p,
+        freeze_ok=freeze_ok,
+        setup_fingerprint=setup_fingerprint,
+        policy_hash=policy_hash,
+    )
+
+
+if __name__ == "__main__":
+    main()