diff --git a/public/tier0/annotations.h b/public/tier0/annotations.h
new file mode 100644
index 00000000..ec103d90
--- /dev/null
+++ b/public/tier0/annotations.h
@@ -0,0 +1,84 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+#ifndef ANALYSIS_ANNOTATIONS_H
+#define ANALYSIS_ANNOTATIONS_H
+
+#if _MSC_VER >= 1600 // VS 2010 and above.
+//-----------------------------------------------------------------------------
+// Upgrading important helpful warnings to errors
+//-----------------------------------------------------------------------------
+#pragma warning(error : 4789 ) // warning C4789: destination of memory copy is too small
+
+// Suppress some code analysis warnings
+#ifdef _PREFAST_
+// Include the annotation header file.
+#include <sal.h>
+
+// For temporarily suppressing warnings -- the warnings are suppressed for the next source line.
+#define ANALYZE_SUPPRESS(wnum) __pragma(warning(suppress: wnum))
+#define ANALYZE_SUPPRESS2(wnum1, wnum2) __pragma(warning(supress: wnum1  wnum2))
+#define ANALYZE_SUPPRESS3(wnum1, wnum2, wnum3) __pragma(warning(suppress: wnum1 wnum2 wnum3))
+#define ANALYZE_SUPPRESS4(wnum1, wnum2, wnum3, wnum4) __pragma(warning(suppress: wnum1 wnum2 wnum3 wnum4))
+
+// Tag all printf style format strings with this
+#define PRINTF_FORMAT_STRING _Printf_format_string_
+#define SCANF_FORMAT_STRING _Scanf_format_string_impl_
+// Various macros for specifying the capacity of the buffer pointed
+// to by a function parameter. Variations include in/out/inout,
+// CAP (elements) versus BYTECAP (bytes), and null termination or
+// not (_Z).
+#define IN_Z _In_z_
+#define IN_CAP(x) _In_count_(x)
+#define IN_BYTECAP(x) _In_bytecount_(x)
+#define OUT_Z_CAP(x) _Out_z_cap_(x)
+#define OUT_CAP(x) _Out_cap_(x)
+#define OUT_CAP_C(x) _Out_cap_c_(x) // Output buffer with specified *constant* capacity in elements
+#define OUT_BYTECAP(x) _Out_bytecap_(x)
+#define OUT_Z_BYTECAP(x) _Out_z_bytecap_(x)
+#define INOUT_BYTECAP(x) _Inout_bytecap_(x)
+#define INOUT_Z_CAP(x) _Inout_z_cap_(x)
+#define INOUT_Z_BYTECAP(x) _Inout_z_bytecap_(x)
+// These macros are use for annotating array reference parameters, typically used in functions
+// such as V_strcpy_safe. Because they are array references the capacity is already known.
+#if _MSC_VER >= 1700
+#define IN_Z_ARRAY _Pre_z_
+#define OUT_Z_ARRAY _Post_z_
+#define INOUT_Z_ARRAY _Prepost_z_
+#else
+#define IN_Z_ARRAY _Deref_pre_z_
+#define OUT_Z_ARRAY _Deref_post_z_
+#define INOUT_Z_ARRAY _Deref_prepost_z_
+#endif // _MSC_VER >= 1700
+// Used for annotating functions to describe their return types.
+#define MUST_CHECK_RETURN _Check_return_
+// Use the macros above to annotate string functions that fill buffers as shown here,
+// in order to give VS's /analyze more opportunities to find bugs.
+// void V_wcsncpy( OUT_Z_BYTECAP(maxLenInBytes) wchar_t *pDest, wchar_t const *pSrc, int maxLenInBytes );
+// int V_snwprintf( OUT_Z_CAP(maxLenInCharacters) wchar_t *pDest, int maxLenInCharacters, PRINTF_FORMAT_STRING const wchar_t *pFormat, ... );
+
+#endif // _PREFAST_
+#endif // _MSC_VER >= 1600 // VS 2010 and above.
+
+#ifndef ANALYZE_SUPPRESS
+#define ANALYZE_SUPPRESS(wnum)
+#define ANALYZE_SUPPRESS2(wnum1, wnum2)
+#define ANALYZE_SUPPRESS3(wnum1, wnum2, wnum3)
+#define ANALYZE_SUPPRESS4(wnum1, wnum2, wnum3, wnum4)
+#define PRINTF_FORMAT_STRING
+#define SCANF_FORMAT_STRING
+#define IN_Z
+#define IN_CAP(x)
+#define IN_BYTECAP(x)
+#define OUT_Z_CAP(x)
+#define OUT_CAP(x)
+#define OUT_CAP_C(x)
+#define OUT_BYTECAP(x)
+#define OUT_Z_BYTECAP(x)
+#define INOUT_BYTECAP(x)
+#define INOUT_Z_CAP(x)
+#define INOUT_Z_BYTECAP(x)
+#define OUT_Z_ARRAY
+#define INOUT_Z_ARRAY
+#define MUST_CHECK_RETURN
+#endif
+
+#endif // ANALYSIS_ANNOTATIONS_H
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