diff --git a/React/Base/RCTAssert.h b/React/Base/RCTAssert.h
index 95b37cc785d..d4ec7fc40c2 100644
--- a/React/Base/RCTAssert.h
+++ b/React/Base/RCTAssert.h
@@ -169,3 +169,11 @@ RCT_EXTERN NSString *RCTFormatStackTrace(NSArray<NSDictionary<NSString *, id> *>
   } while (0)
 
 #endif
+
+/**
+ * Controls for ensuring the new architecture runtime assumption holds.
+ * Note: this is work in progress.
+ */
+__attribute__((used)) RCT_EXTERN void RCTEnableNewArchitectureViolationReporting(BOOL enabled);
+__attribute__((used)) RCT_EXTERN BOOL RCTNewArchitectureViolationReportingEnabled(void);
+__attribute__((used)) RCT_EXTERN void RCTAssertAndTrackNewArchitectureViolation(NSString *violation);
diff --git a/React/Base/RCTAssert.m b/React/Base/RCTAssert.m
index 087900d1979..4f40bbfa01a 100644
--- a/React/Base/RCTAssert.m
+++ b/React/Base/RCTAssert.m
@@ -230,3 +230,29 @@ RCTFatalExceptionHandler RCTGetFatalExceptionHandler(void)
 {
   return RCTCurrentFatalExceptionHandler;
 }
+
+// New architecture section.
+static BOOL newArchitectureViolationReporting = NO;
+
+void RCTEnableNewArchitectureViolationReporting(BOOL enabled)
+{
+  newArchitectureViolationReporting = enabled;
+}
+
+BOOL RCTNewArchitectureViolationReportingEnabled(void)
+{
+  return newArchitectureViolationReporting;
+}
+
+void RCTAssertAndTrackNewArchitectureViolation(NSString *violation)
+{
+  if (!RCTNewArchitectureViolationReportingEnabled()) {
+    return;
+  }
+
+#if RCT_NEW_ARCHITECTURE
+  RCTAssert(0, @"New architecture violation assertion: %@", violation);
+#endif
+
+  // TODO: Actually track violations in a global space (separate from assertion).
+}
diff --git a/React/Base/RCTDefines.h b/React/Base/RCTDefines.h
index 23be65eb5c6..b416f71a635 100644
--- a/React/Base/RCTDefines.h
+++ b/React/Base/RCTDefines.h
@@ -142,3 +142,13 @@
     @throw _RCTNotImplementedException(_cmd, [self class]);                                             \
   }                                                                                                     \
   _Pragma("clang diagnostic pop")
+
+/**
+ * Controls for activating the new architecture without the legacy system.
+ * Note: this is work in progress.
+ */
+#ifdef REACT_NATIVE_FORCE_NEW_ARCHITECTURE
+#define RCT_NEW_ARCHITECTURE 1
+#else
+#define RCT_NEW_ARCHITECTURE 0
+#endif