diff --git a/common/include/common/KVMFRStream.h b/common/include/common/KVMFRStream.h
new file mode 100644
index 00000000..36598f59
--- /dev/null
+++ b/common/include/common/KVMFRStream.h
@@ -0,0 +1,68 @@
+/**
+ * Looking Glass
+ * Copyright © 2017-2026 The Looking Glass Authors
+ * https://looking-glass.io
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc., 59
+ * Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef _H_LG_COMMON_KVMFR_STREAM_
+#define _H_LG_COMMON_KVMFR_STREAM_
+
+#pragma once
+
+#include <stddef.h>
+#include <stdint.h>
+
+/*
+ * Transport-neutral wire copy of an exported LGMP stream descriptor. Keep
+ * common protocol headers independent of LGMP; the LGMP transports convert
+ * this structure field by field at their integration boundary.
+ */
+typedef struct KVMFRStreamDescriptor
+{
+  uint32_t magic;
+  uint16_t version;
+  uint16_t size;
+  uint32_t offset;
+  uint32_t regionSize;
+  uint32_t direction;
+  uint32_t policy;
+  uint32_t slotCount;
+  uint32_t slotSize;
+}
+KVMFRStreamDescriptor;
+
+#if defined(__cplusplus)
+static_assert(offsetof(KVMFRStreamDescriptor, magic) == 0,
+    "KVMFR stream descriptor magic layout changed");
+static_assert(offsetof(KVMFRStreamDescriptor, offset) == 8,
+    "KVMFR stream descriptor offset layout changed");
+static_assert(offsetof(KVMFRStreamDescriptor, slotSize) == 28,
+    "KVMFR stream descriptor geometry layout changed");
+static_assert(sizeof(KVMFRStreamDescriptor) == 32,
+    "KVMFR stream descriptor layout changed");
+#elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
+_Static_assert(offsetof(KVMFRStreamDescriptor, magic) == 0,
+    "KVMFR stream descriptor magic layout changed");
+_Static_assert(offsetof(KVMFRStreamDescriptor, offset) == 8,
+    "KVMFR stream descriptor offset layout changed");
+_Static_assert(offsetof(KVMFRStreamDescriptor, slotSize) == 28,
+    "KVMFR stream descriptor geometry layout changed");
+_Static_assert(sizeof(KVMFRStreamDescriptor) == 32,
+    "KVMFR stream descriptor layout changed");
+#endif
+
+#endif