diff --git a/wpilibNewCommands/src/main/native/include/frc2/command/Command.h b/wpilibNewCommands/src/main/native/include/frc2/command/Command.h
index 0d13ef3326..414785f205 100644
--- a/wpilibNewCommands/src/main/native/include/frc2/command/Command.h
+++ b/wpilibNewCommands/src/main/native/include/frc2/command/Command.h
@@ -5,9 +5,7 @@
 #pragma once
 
 #include <functional>
-#include <initializer_list>
 #include <memory>
-#include <span>
 #include <string>
 
 #include <units/time.h>
diff --git a/wpilibNewCommands/src/main/native/include/frc2/command/CommandPtr.h b/wpilibNewCommands/src/main/native/include/frc2/command/CommandPtr.h
index fa29f9a7e4..ec21b51192 100644
--- a/wpilibNewCommands/src/main/native/include/frc2/command/CommandPtr.h
+++ b/wpilibNewCommands/src/main/native/include/frc2/command/CommandPtr.h
@@ -6,14 +6,13 @@
 
 #include <concepts>
 #include <functional>
-#include <initializer_list>
 #include <memory>
-#include <span>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "frc2/command/Command.h"
+#include "frc2/command/Requirements.h"
 
 namespace frc2 {
 /**
diff --git a/wpilibNewCommands/src/main/native/include/frc2/command/Commands.h b/wpilibNewCommands/src/main/native/include/frc2/command/Commands.h
index 7653188dc6..beefcd8c3e 100644
--- a/wpilibNewCommands/src/main/native/include/frc2/command/Commands.h
+++ b/wpilibNewCommands/src/main/native/include/frc2/command/Commands.h
@@ -6,15 +6,14 @@
 
 #include <concepts>
 #include <functional>
-#include <initializer_list>
 #include <memory>
-#include <span>
 #include <string>
 #include <type_traits>
 #include <utility>
 #include <vector>
 
 #include "frc2/command/CommandPtr.h"
+#include "frc2/command/Requirements.h"
 #include "frc2/command/SelectCommand.h"
 
 namespace frc2 {
diff --git a/wpilibNewCommands/src/main/native/include/frc2/command/FunctionalCommand.h b/wpilibNewCommands/src/main/native/include/frc2/command/FunctionalCommand.h
index 5fa57f1713..ac11765675 100644
--- a/wpilibNewCommands/src/main/native/include/frc2/command/FunctionalCommand.h
+++ b/wpilibNewCommands/src/main/native/include/frc2/command/FunctionalCommand.h
@@ -5,11 +5,10 @@
 #pragma once
 
 #include <functional>
-#include <initializer_list>
-#include <span>
 
 #include "frc2/command/Command.h"
 #include "frc2/command/CommandHelper.h"
+#include "frc2/command/Requirements.h"
 
 namespace frc2 {
 /**
diff --git a/wpilibNewCommands/src/main/native/include/frc2/command/InstantCommand.h b/wpilibNewCommands/src/main/native/include/frc2/command/InstantCommand.h
index 1e552cc447..3ac32ecb0a 100644
--- a/wpilibNewCommands/src/main/native/include/frc2/command/InstantCommand.h
+++ b/wpilibNewCommands/src/main/native/include/frc2/command/InstantCommand.h
@@ -5,11 +5,10 @@
 #pragma once
 
 #include <functional>
-#include <initializer_list>
-#include <span>
 
 #include "frc2/command/CommandHelper.h"
 #include "frc2/command/FunctionalCommand.h"
+#include "frc2/command/Requirements.h"
 
 namespace frc2 {
 /**
diff --git a/wpilibNewCommands/src/main/native/include/frc2/command/MecanumControllerCommand.h b/wpilibNewCommands/src/main/native/include/frc2/command/MecanumControllerCommand.h
index 9a88186dcd..e189ef1b95 100644
--- a/wpilibNewCommands/src/main/native/include/frc2/command/MecanumControllerCommand.h
+++ b/wpilibNewCommands/src/main/native/include/frc2/command/MecanumControllerCommand.h
@@ -4,9 +4,7 @@
 
 #include <cmath>
 #include <functional>
-#include <initializer_list>
 #include <memory>
-#include <span>
 
 #include <frc/Timer.h>
 #include <frc/controller/HolonomicDriveController.h>
@@ -23,8 +21,9 @@
 #include <units/velocity.h>
 #include <units/voltage.h>
 
-#include "Command.h"
-#include "CommandHelper.h"
+#include "frc2/command/Command.h"
+#include "frc2/command/CommandHelper.h"
+#include "frc2/command/Requirements.h"
 
 #pragma once
 
diff --git a/wpilibNewCommands/src/main/native/include/frc2/command/NotifierCommand.h b/wpilibNewCommands/src/main/native/include/frc2/command/NotifierCommand.h
index 9bb063f56a..d17867b1dc 100644
--- a/wpilibNewCommands/src/main/native/include/frc2/command/NotifierCommand.h
+++ b/wpilibNewCommands/src/main/native/include/frc2/command/NotifierCommand.h
@@ -5,14 +5,13 @@
 #pragma once
 
 #include <functional>
-#include <initializer_list>
-#include <span>
 
 #include <frc/Notifier.h>
 #include <units/time.h>
 
 #include "frc2/command/Command.h"
 #include "frc2/command/CommandHelper.h"
+#include "frc2/command/Requirements.h"
 
 namespace frc2 {
 /**
diff --git a/wpilibNewCommands/src/main/native/include/frc2/command/PIDCommand.h b/wpilibNewCommands/src/main/native/include/frc2/command/PIDCommand.h
index 4d2648b298..bede6d0d51 100644
--- a/wpilibNewCommands/src/main/native/include/frc2/command/PIDCommand.h
+++ b/wpilibNewCommands/src/main/native/include/frc2/command/PIDCommand.h
@@ -5,13 +5,12 @@
 #pragma once
 
 #include <functional>
-#include <initializer_list>
-#include <span>
 
 #include <frc/controller/PIDController.h>
 
 #include "frc2/command/Command.h"
 #include "frc2/command/CommandHelper.h"
+#include "frc2/command/Requirements.h"
 
 namespace frc2 {
 /**
diff --git a/wpilibNewCommands/src/main/native/include/frc2/command/ProfiledPIDCommand.h b/wpilibNewCommands/src/main/native/include/frc2/command/ProfiledPIDCommand.h
index 01aa90a8ee..9ea5db5c7e 100644
--- a/wpilibNewCommands/src/main/native/include/frc2/command/ProfiledPIDCommand.h
+++ b/wpilibNewCommands/src/main/native/include/frc2/command/ProfiledPIDCommand.h
@@ -5,8 +5,6 @@
 #pragma once
 
 #include <functional>
-#include <initializer_list>
-#include <span>
 #include <utility>
 
 #include <frc/controller/ProfiledPIDController.h>
@@ -14,6 +12,7 @@
 
 #include "frc2/command/Command.h"
 #include "frc2/command/CommandHelper.h"
+#include "frc2/command/Requirements.h"
 
 namespace frc2 {
 /**
diff --git a/wpilibNewCommands/src/main/native/include/frc2/command/ProxyCommand.h b/wpilibNewCommands/src/main/native/include/frc2/command/ProxyCommand.h
index d39ef054b0..3b7eecc674 100644
--- a/wpilibNewCommands/src/main/native/include/frc2/command/ProxyCommand.h
+++ b/wpilibNewCommands/src/main/native/include/frc2/command/ProxyCommand.h
@@ -5,7 +5,6 @@
 #pragma once
 
 #include <memory>
-#include <span>
 
 #include <wpi/FunctionExtras.h>
 
diff --git a/wpilibNewCommands/src/main/native/include/frc2/command/RamseteCommand.h b/wpilibNewCommands/src/main/native/include/frc2/command/RamseteCommand.h
index 1339bb1564..56fb8ff92d 100644
--- a/wpilibNewCommands/src/main/native/include/frc2/command/RamseteCommand.h
+++ b/wpilibNewCommands/src/main/native/include/frc2/command/RamseteCommand.h
@@ -5,9 +5,7 @@
 #pragma once
 
 #include <functional>
-#include <initializer_list>
 #include <memory>
-#include <span>
 
 #include <frc/Timer.h>
 #include <frc/controller/PIDController.h>
@@ -21,6 +19,7 @@
 
 #include "frc2/command/Command.h"
 #include "frc2/command/CommandHelper.h"
+#include "frc2/command/Requirements.h"
 
 namespace frc2 {
 /**
diff --git a/wpilibNewCommands/src/main/native/include/frc2/command/RunCommand.h b/wpilibNewCommands/src/main/native/include/frc2/command/RunCommand.h
index 021ba4009f..49e4be5548 100644
--- a/wpilibNewCommands/src/main/native/include/frc2/command/RunCommand.h
+++ b/wpilibNewCommands/src/main/native/include/frc2/command/RunCommand.h
@@ -5,11 +5,10 @@
 #pragma once
 
 #include <functional>
-#include <initializer_list>
-#include <span>
 
 #include "frc2/command/CommandHelper.h"
 #include "frc2/command/FunctionalCommand.h"
+#include "frc2/command/Requirements.h"
 
 namespace frc2 {
 /**
diff --git a/wpilibNewCommands/src/main/native/include/frc2/command/SequentialCommandGroup.h b/wpilibNewCommands/src/main/native/include/frc2/command/SequentialCommandGroup.h
index dac6cc7d45..fdcd1bc22f 100644
--- a/wpilibNewCommands/src/main/native/include/frc2/command/SequentialCommandGroup.h
+++ b/wpilibNewCommands/src/main/native/include/frc2/command/SequentialCommandGroup.h
@@ -12,7 +12,6 @@
 #include <concepts>
 #include <limits>
 #include <memory>
-#include <span>
 #include <type_traits>
 #include <utility>
 #include <vector>
diff --git a/wpilibNewCommands/src/main/native/include/frc2/command/StartEndCommand.h b/wpilibNewCommands/src/main/native/include/frc2/command/StartEndCommand.h
index 20d890a10d..2367be8866 100644
--- a/wpilibNewCommands/src/main/native/include/frc2/command/StartEndCommand.h
+++ b/wpilibNewCommands/src/main/native/include/frc2/command/StartEndCommand.h
@@ -5,11 +5,10 @@
 #pragma once
 
 #include <functional>
-#include <initializer_list>
-#include <span>
 
 #include "frc2/command/CommandHelper.h"
 #include "frc2/command/FunctionalCommand.h"
+#include "frc2/command/Requirements.h"
 
 namespace frc2 {
 /**
diff --git a/wpilibNewCommands/src/main/native/include/frc2/command/SwerveControllerCommand.h b/wpilibNewCommands/src/main/native/include/frc2/command/SwerveControllerCommand.h
index 835a089421..ae928b8b4a 100644
--- a/wpilibNewCommands/src/main/native/include/frc2/command/SwerveControllerCommand.h
+++ b/wpilibNewCommands/src/main/native/include/frc2/command/SwerveControllerCommand.h
@@ -4,9 +4,7 @@
 
 #include <cmath>
 #include <functional>
-#include <initializer_list>
 #include <memory>
-#include <span>
 
 #include <frc/Timer.h>
 #include <frc/controller/HolonomicDriveController.h>
@@ -21,8 +19,9 @@
 #include <units/time.h>
 #include <units/voltage.h>
 
-#include "Command.h"
-#include "CommandHelper.h"
+#include "frc2/command/Command.h"
+#include "frc2/command/CommandHelper.h"
+#include "frc2/command/Requirements.h"
 
 #pragma once
 
diff --git a/wpilibNewCommands/src/main/native/include/frc2/command/TrapezoidProfileCommand.h b/wpilibNewCommands/src/main/native/include/frc2/command/TrapezoidProfileCommand.h
index ccbb07b661..69cc8d8b23 100644
--- a/wpilibNewCommands/src/main/native/include/frc2/command/TrapezoidProfileCommand.h
+++ b/wpilibNewCommands/src/main/native/include/frc2/command/TrapezoidProfileCommand.h
@@ -5,14 +5,13 @@
 #pragma once
 
 #include <functional>
-#include <initializer_list>
-#include <span>
 
 #include <frc/Timer.h>
 #include <frc/trajectory/TrapezoidProfile.h>
 
 #include "frc2/command/Command.h"
 #include "frc2/command/CommandHelper.h"
+#include "frc2/command/Requirements.h"
 
 namespace frc2 {
 /**
diff --git a/wpilibNewCommands/src/main/native/include/frc2/command/button/Trigger.h b/wpilibNewCommands/src/main/native/include/frc2/command/button/Trigger.h
index c4433a5813..533e0a6787 100644
--- a/wpilibNewCommands/src/main/native/include/frc2/command/button/Trigger.h
+++ b/wpilibNewCommands/src/main/native/include/frc2/command/button/Trigger.h
@@ -6,9 +6,7 @@
 
 #include <concepts>
 #include <functional>
-#include <initializer_list>
 #include <memory>
-#include <span>
 #include <utility>
 
 #include <frc/event/BooleanEvent.h>
diff --git a/wpilibNewCommands/src/test/native/cpp/frc2/command/CommandTestBase.h b/wpilibNewCommands/src/test/native/cpp/frc2/command/CommandTestBase.h
index 8fb507072e..586432dff0 100644
--- a/wpilibNewCommands/src/test/native/cpp/frc2/command/CommandTestBase.h
+++ b/wpilibNewCommands/src/test/native/cpp/frc2/command/CommandTestBase.h
@@ -13,6 +13,7 @@
 
 #include "frc2/command/CommandHelper.h"
 #include "frc2/command/CommandScheduler.h"
+#include "frc2/command/Requirements.h"
 #include "frc2/command/SubsystemBase.h"
 #include "gmock/gmock.h"
 #include "make_vector.h"
@@ -50,8 +51,8 @@ class MockCommand : public CommandHelper<Command, MockCommand> {
         .WillRepeatedly(::testing::Return(true));
   }
 
-  MockCommand(std::initializer_list<Subsystem*> requirements,
-              bool finished = false, bool runWhenDisabled = true) {
+  explicit MockCommand(Requirements requirements, bool finished = false,
+                       bool runWhenDisabled = true) {
     m_requirements.insert(requirements.begin(), requirements.end());
     EXPECT_CALL(*this, GetRequirements())
         .WillRepeatedly(::testing::Return(m_requirements));