diff --git a/api/enums/v1/common.go-helpers.pb.go b/api/enums/v1/common.go-helpers.pb.go
index 689c2ad244e..f9e868d4784 100644
--- a/api/enums/v1/common.go-helpers.pb.go
+++ b/api/enums/v1/common.go-helpers.pb.go
@@ -85,6 +85,83 @@ func SchedulerStateFromString(s string) (SchedulerState, error) {
 	return SchedulerState(0), fmt.Errorf("%s is not a valid SchedulerState", s)
 }
 
+var (
+	Scheduler2State_shorthandValue = map[string]int32{
+		"Scheduler2StateUnspecified": 0,
+		"Scheduler2StateRunning":     1,
+	}
+)
+
+// Scheduler2StateFromString parses a Scheduler2State value from  either the protojson
+// canonical SCREAMING_CASE enum or the traditional temporal PascalCase enum to Scheduler2State
+func Scheduler2StateFromString(s string) (Scheduler2State, error) {
+	if v, ok := Scheduler2State_value[s]; ok {
+		return Scheduler2State(v), nil
+	} else if v, ok := Scheduler2State_shorthandValue[s]; ok {
+		return Scheduler2State(v), nil
+	}
+	return Scheduler2State(0), fmt.Errorf("%s is not a valid Scheduler2State", s)
+}
+
+var (
+	SchedulerGeneratorState_shorthandValue = map[string]int32{
+		"Unspecified": 0,
+		"Waiting":     1,
+		"Buffering":   2,
+	}
+)
+
+// SchedulerGeneratorStateFromString parses a SchedulerGeneratorState value from  either the protojson
+// canonical SCREAMING_CASE enum or the traditional temporal PascalCase enum to SchedulerGeneratorState
+func SchedulerGeneratorStateFromString(s string) (SchedulerGeneratorState, error) {
+	if v, ok := SchedulerGeneratorState_value[s]; ok {
+		return SchedulerGeneratorState(v), nil
+	} else if v, ok := SchedulerGeneratorState_shorthandValue[s]; ok {
+		return SchedulerGeneratorState(v), nil
+	}
+	return SchedulerGeneratorState(0), fmt.Errorf("%s is not a valid SchedulerGeneratorState", s)
+}
+
+var (
+	SchedulerExecutorState_shorthandValue = map[string]int32{
+		"Unspecified": 0,
+		"Waiting":     1,
+		"Executing":   2,
+		"BackingOff":  3,
+	}
+)
+
+// SchedulerExecutorStateFromString parses a SchedulerExecutorState value from  either the protojson
+// canonical SCREAMING_CASE enum or the traditional temporal PascalCase enum to SchedulerExecutorState
+func SchedulerExecutorStateFromString(s string) (SchedulerExecutorState, error) {
+	if v, ok := SchedulerExecutorState_value[s]; ok {
+		return SchedulerExecutorState(v), nil
+	} else if v, ok := SchedulerExecutorState_shorthandValue[s]; ok {
+		return SchedulerExecutorState(v), nil
+	}
+	return SchedulerExecutorState(0), fmt.Errorf("%s is not a valid SchedulerExecutorState", s)
+}
+
+var (
+	SchedulerBackfillerState_shorthandValue = map[string]int32{
+		"Unspecified": 0,
+		"Waiting":     1,
+		"Executing":   2,
+		"BackingOff":  3,
+	}
+)
+
+// SchedulerBackfillerStateFromString parses a SchedulerBackfillerState value from  either the protojson
+// canonical SCREAMING_CASE enum or the traditional temporal PascalCase enum to SchedulerBackfillerState
+func SchedulerBackfillerStateFromString(s string) (SchedulerBackfillerState, error) {
+	if v, ok := SchedulerBackfillerState_value[s]; ok {
+		return SchedulerBackfillerState(v), nil
+	} else if v, ok := SchedulerBackfillerState_shorthandValue[s]; ok {
+		return SchedulerBackfillerState(v), nil
+	}
+	return SchedulerBackfillerState(0), fmt.Errorf("%s is not a valid SchedulerBackfillerState", s)
+}
+
 var (
 	CallbackState_shorthandValue = map[string]int32{
 		"Unspecified": 0,
diff --git a/api/enums/v1/common.pb.go b/api/enums/v1/common.pb.go
index 23c05744026..ff71317b6de 100644
--- a/api/enums/v1/common.pb.go
+++ b/api/enums/v1/common.pb.go
@@ -220,6 +220,263 @@ func (SchedulerState) EnumDescriptor() ([]byte, []int) {
 	return file_temporal_server_api_enums_v1_common_proto_rawDescGZIP(), []int{2}
 }
 
+type Scheduler2State int32
+
+const (
+	// Default value, unspecified state.
+	SCHEDULER2_STATE_UNSPECIFIED Scheduler2State = 0
+	// Scheduler's top-level state machine has been initialized and is running
+	SCHEDULER2_STATE_RUNNING Scheduler2State = 1
+)
+
+// Enum value maps for Scheduler2State.
+var (
+	Scheduler2State_name = map[int32]string{
+		0: "SCHEDULER2_STATE_UNSPECIFIED",
+		1: "SCHEDULER2_STATE_RUNNING",
+	}
+	Scheduler2State_value = map[string]int32{
+		"SCHEDULER2_STATE_UNSPECIFIED": 0,
+		"SCHEDULER2_STATE_RUNNING":     1,
+	}
+)
+
+func (x Scheduler2State) Enum() *Scheduler2State {
+	p := new(Scheduler2State)
+	*p = x
+	return p
+}
+
+func (x Scheduler2State) String() string {
+	switch x {
+	case SCHEDULER2_STATE_UNSPECIFIED:
+		return "Unspecified"
+	case SCHEDULER2_STATE_RUNNING:
+		return "Running"
+	default:
+		return strconv.Itoa(int(x))
+	}
+
+}
+
+func (Scheduler2State) Descriptor() protoreflect.EnumDescriptor {
+	return file_temporal_server_api_enums_v1_common_proto_enumTypes[3].Descriptor()
+}
+
+func (Scheduler2State) Type() protoreflect.EnumType {
+	return &file_temporal_server_api_enums_v1_common_proto_enumTypes[3]
+}
+
+func (x Scheduler2State) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use Scheduler2State.Descriptor instead.
+func (Scheduler2State) EnumDescriptor() ([]byte, []int) {
+	return file_temporal_server_api_enums_v1_common_proto_rawDescGZIP(), []int{3}
+}
+
+// State for the V2 Scheduler's Generator substate machine.
+type SchedulerGeneratorState int32
+
+const (
+	// Default value, unspecified state.
+	SCHEDULER_GENERATOR_STATE_UNSPECIFIED SchedulerGeneratorState = 0
+	// Generator is waiting to be activated after the specified amount of time.
+	SCHEDULER_GENERATOR_STATE_WAITING SchedulerGeneratorState = 1
+	// Generator is buffering actions.
+	SCHEDULER_GENERATOR_STATE_BUFFERING SchedulerGeneratorState = 2
+)
+
+// Enum value maps for SchedulerGeneratorState.
+var (
+	SchedulerGeneratorState_name = map[int32]string{
+		0: "SCHEDULER_GENERATOR_STATE_UNSPECIFIED",
+		1: "SCHEDULER_GENERATOR_STATE_WAITING",
+		2: "SCHEDULER_GENERATOR_STATE_BUFFERING",
+	}
+	SchedulerGeneratorState_value = map[string]int32{
+		"SCHEDULER_GENERATOR_STATE_UNSPECIFIED": 0,
+		"SCHEDULER_GENERATOR_STATE_WAITING":     1,
+		"SCHEDULER_GENERATOR_STATE_BUFFERING":   2,
+	}
+)
+
+func (x SchedulerGeneratorState) Enum() *SchedulerGeneratorState {
+	p := new(SchedulerGeneratorState)
+	*p = x
+	return p
+}
+
+func (x SchedulerGeneratorState) String() string {
+	switch x {
+	case SCHEDULER_GENERATOR_STATE_UNSPECIFIED:
+		return "Unspecified"
+	case SCHEDULER_GENERATOR_STATE_WAITING:
+		return "Waiting"
+	case SCHEDULER_GENERATOR_STATE_BUFFERING:
+		return "Buffering"
+	default:
+		return strconv.Itoa(int(x))
+	}
+
+}
+
+func (SchedulerGeneratorState) Descriptor() protoreflect.EnumDescriptor {
+	return file_temporal_server_api_enums_v1_common_proto_enumTypes[4].Descriptor()
+}
+
+func (SchedulerGeneratorState) Type() protoreflect.EnumType {
+	return &file_temporal_server_api_enums_v1_common_proto_enumTypes[4]
+}
+
+func (x SchedulerGeneratorState) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use SchedulerGeneratorState.Descriptor instead.
+func (SchedulerGeneratorState) EnumDescriptor() ([]byte, []int) {
+	return file_temporal_server_api_enums_v1_common_proto_rawDescGZIP(), []int{4}
+}
+
+// State for the V2 Scheduler's Executor substate machine.
+type SchedulerExecutorState int32
+
+const (
+	// Default value, unspecified state.
+	SCHEDULER_EXECUTOR_STATE_UNSPECIFIED SchedulerExecutorState = 0
+	// Executor is awaiting actions to be buffered and eligible for execution.
+	SCHEDULER_EXECUTOR_STATE_WAITING SchedulerExecutorState = 1
+	// Executor is starting actions.
+	SCHEDULER_EXECUTOR_STATE_EXECUTING SchedulerExecutorState = 2
+	// Executor is backing off from executing actions.
+	SCHEDULER_EXECUTOR_STATE_BACKING_OFF SchedulerExecutorState = 3
+)
+
+// Enum value maps for SchedulerExecutorState.
+var (
+	SchedulerExecutorState_name = map[int32]string{
+		0: "SCHEDULER_EXECUTOR_STATE_UNSPECIFIED",
+		1: "SCHEDULER_EXECUTOR_STATE_WAITING",
+		2: "SCHEDULER_EXECUTOR_STATE_EXECUTING",
+		3: "SCHEDULER_EXECUTOR_STATE_BACKING_OFF",
+	}
+	SchedulerExecutorState_value = map[string]int32{
+		"SCHEDULER_EXECUTOR_STATE_UNSPECIFIED": 0,
+		"SCHEDULER_EXECUTOR_STATE_WAITING":     1,
+		"SCHEDULER_EXECUTOR_STATE_EXECUTING":   2,
+		"SCHEDULER_EXECUTOR_STATE_BACKING_OFF": 3,
+	}
+)
+
+func (x SchedulerExecutorState) Enum() *SchedulerExecutorState {
+	p := new(SchedulerExecutorState)
+	*p = x
+	return p
+}
+
+func (x SchedulerExecutorState) String() string {
+	switch x {
+	case SCHEDULER_EXECUTOR_STATE_UNSPECIFIED:
+		return "Unspecified"
+	case SCHEDULER_EXECUTOR_STATE_WAITING:
+		return "Waiting"
+	case SCHEDULER_EXECUTOR_STATE_EXECUTING:
+		return "Executing"
+	case SCHEDULER_EXECUTOR_STATE_BACKING_OFF:
+		return "BackingOff"
+	default:
+		return strconv.Itoa(int(x))
+	}
+
+}
+
+func (SchedulerExecutorState) Descriptor() protoreflect.EnumDescriptor {
+	return file_temporal_server_api_enums_v1_common_proto_enumTypes[5].Descriptor()
+}
+
+func (SchedulerExecutorState) Type() protoreflect.EnumType {
+	return &file_temporal_server_api_enums_v1_common_proto_enumTypes[5]
+}
+
+func (x SchedulerExecutorState) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use SchedulerExecutorState.Descriptor instead.
+func (SchedulerExecutorState) EnumDescriptor() ([]byte, []int) {
+	return file_temporal_server_api_enums_v1_common_proto_rawDescGZIP(), []int{5}
+}
+
+// State for the V2 Scheduler's Backfiller substate machine.
+type SchedulerBackfillerState int32
+
+const (
+	// Default value, unspecified state.
+	SCHEDULER_BACKFILLER_STATE_UNSPECIFIED SchedulerBackfillerState = 0
+	// Backfiller is awaiting backfill to be requested.
+	SCHEDULER_BACKFILLER_STATE_WAITING SchedulerBackfillerState = 1
+	// Backfiller is actively starting actions.
+	SCHEDULER_BACKFILLER_STATE_EXECUTING SchedulerBackfillerState = 2
+	// Backfiller is backing off from starting actions.
+	SCHEDULER_BACKFILLER_STATE_BACKING_OFF SchedulerBackfillerState = 3
+)
+
+// Enum value maps for SchedulerBackfillerState.
+var (
+	SchedulerBackfillerState_name = map[int32]string{
+		0: "SCHEDULER_BACKFILLER_STATE_UNSPECIFIED",
+		1: "SCHEDULER_BACKFILLER_STATE_WAITING",
+		2: "SCHEDULER_BACKFILLER_STATE_EXECUTING",
+		3: "SCHEDULER_BACKFILLER_STATE_BACKING_OFF",
+	}
+	SchedulerBackfillerState_value = map[string]int32{
+		"SCHEDULER_BACKFILLER_STATE_UNSPECIFIED": 0,
+		"SCHEDULER_BACKFILLER_STATE_WAITING":     1,
+		"SCHEDULER_BACKFILLER_STATE_EXECUTING":   2,
+		"SCHEDULER_BACKFILLER_STATE_BACKING_OFF": 3,
+	}
+)
+
+func (x SchedulerBackfillerState) Enum() *SchedulerBackfillerState {
+	p := new(SchedulerBackfillerState)
+	*p = x
+	return p
+}
+
+func (x SchedulerBackfillerState) String() string {
+	switch x {
+	case SCHEDULER_BACKFILLER_STATE_UNSPECIFIED:
+		return "Unspecified"
+	case SCHEDULER_BACKFILLER_STATE_WAITING:
+		return "Waiting"
+	case SCHEDULER_BACKFILLER_STATE_EXECUTING:
+		return "Executing"
+	case SCHEDULER_BACKFILLER_STATE_BACKING_OFF:
+		return "BackingOff"
+	default:
+		return strconv.Itoa(int(x))
+	}
+
+}
+
+func (SchedulerBackfillerState) Descriptor() protoreflect.EnumDescriptor {
+	return file_temporal_server_api_enums_v1_common_proto_enumTypes[6].Descriptor()
+}
+
+func (SchedulerBackfillerState) Type() protoreflect.EnumType {
+	return &file_temporal_server_api_enums_v1_common_proto_enumTypes[6]
+}
+
+func (x SchedulerBackfillerState) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use SchedulerBackfillerState.Descriptor instead.
+func (SchedulerBackfillerState) EnumDescriptor() ([]byte, []int) {
+	return file_temporal_server_api_enums_v1_common_proto_rawDescGZIP(), []int{6}
+}
+
 // State of a callback.
 type CallbackState int32
 
@@ -285,11 +542,11 @@ func (x CallbackState) String() string {
 }
 
 func (CallbackState) Descriptor() protoreflect.EnumDescriptor {
-	return file_temporal_server_api_enums_v1_common_proto_enumTypes[3].Descriptor()
+	return file_temporal_server_api_enums_v1_common_proto_enumTypes[7].Descriptor()
 }
 
 func (CallbackState) Type() protoreflect.EnumType {
-	return &file_temporal_server_api_enums_v1_common_proto_enumTypes[3]
+	return &file_temporal_server_api_enums_v1_common_proto_enumTypes[7]
 }
 
 func (x CallbackState) Number() protoreflect.EnumNumber {
@@ -298,7 +555,7 @@ func (x CallbackState) Number() protoreflect.EnumNumber {
 
 // Deprecated: Use CallbackState.Descriptor instead.
 func (CallbackState) EnumDescriptor() ([]byte, []int) {
-	return file_temporal_server_api_enums_v1_common_proto_rawDescGZIP(), []int{3}
+	return file_temporal_server_api_enums_v1_common_proto_rawDescGZIP(), []int{7}
 }
 
 var File_temporal_server_api_enums_v1_common_proto protoreflect.FileDescriptor
@@ -330,23 +587,62 @@ var file_temporal_server_api_enums_v1_common_proto_rawDesc = []byte{
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+	0x01, 0x12, 0x26, 0x0a, 0x22, 0x53, 0x43, 0x48, 0x45, 0x44, 0x55, 0x4c, 0x45, 0x52, 0x5f, 0x45,
+	0x58, 0x45, 0x43, 0x55, 0x54, 0x4f, 0x52, 0x5f, 0x53, 0x54, 0x41, 0x54, 0x45, 0x5f, 0x45, 0x58,
+	0x45, 0x43, 0x55, 0x54, 0x49, 0x4e, 0x47, 0x10, 0x02, 0x12, 0x28, 0x0a, 0x24, 0x53, 0x43, 0x48,
+	0x45, 0x44, 0x55, 0x4c, 0x45, 0x52, 0x5f, 0x45, 0x58, 0x45, 0x43, 0x55, 0x54, 0x4f, 0x52, 0x5f,
+	0x53, 0x54, 0x41, 0x54, 0x45, 0x5f, 0x42, 0x41, 0x43, 0x4b, 0x49, 0x4e, 0x47, 0x5f, 0x4f, 0x46,
+	0x46, 0x10, 0x03, 0x2a, 0xc4, 0x01, 0x0a, 0x18, 0x53, 0x63, 0x68, 0x65, 0x64, 0x75, 0x6c, 0x65,
+	0x72, 0x42, 0x61, 0x63, 0x6b, 0x66, 0x69, 0x6c, 0x6c, 0x65, 0x72, 0x53, 0x74, 0x61, 0x74, 0x65,
+	0x12, 0x2a, 0x0a, 0x26, 0x53, 0x43, 0x48, 0x45, 0x44, 0x55, 0x4c, 0x45, 0x52, 0x5f, 0x42, 0x41,
+	0x43, 0x4b, 0x46, 0x49, 0x4c, 0x4c, 0x45, 0x52, 0x5f, 0x53, 0x54, 0x41, 0x54, 0x45, 0x5f, 0x55,
+	0x4e, 0x53, 0x50, 0x45, 0x43, 0x49, 0x46, 0x49, 0x45, 0x44, 0x10, 0x00, 0x12, 0x26, 0x0a, 0x22,
+	0x53, 0x43, 0x48, 0x45, 0x44, 0x55, 0x4c, 0x45, 0x52, 0x5f, 0x42, 0x41, 0x43, 0x4b, 0x46, 0x49,
+	0x4c, 0x4c, 0x45, 0x52, 0x5f, 0x53, 0x54, 0x41, 0x54, 0x45, 0x5f, 0x57, 0x41, 0x49, 0x54, 0x49,
+	0x4e, 0x47, 0x10, 0x01, 0x12, 0x28, 0x0a, 0x24, 0x53, 0x43, 0x48, 0x45, 0x44, 0x55, 0x4c, 0x45,
+	0x52, 0x5f, 0x42, 0x41, 0x43, 0x4b, 0x46, 0x49, 0x4c, 0x4c, 0x45, 0x52, 0x5f, 0x53, 0x54, 0x41,
+	0x54, 0x45, 0x5f, 0x45, 0x58, 0x45, 0x43, 0x55, 0x54, 0x49, 0x4e, 0x47, 0x10, 0x02, 0x12, 0x2a,
+	0x0a, 0x26, 0x53, 0x43, 0x48, 0x45, 0x44, 0x55, 0x4c, 0x45, 0x52, 0x5f, 0x42, 0x41, 0x43, 0x4b,
+	0x46, 0x49, 0x4c, 0x4c, 0x45, 0x52, 0x5f, 0x53, 0x54, 0x41, 0x54, 0x45, 0x5f, 0x42, 0x41, 0x43,
+	0x4b, 0x49, 0x4e, 0x47, 0x5f, 0x4f, 0x46, 0x46, 0x10, 0x03, 0x2a, 0xc2, 0x01, 0x0a, 0x0d, 0x43,
+	0x61, 0x6c, 0x6c, 0x62, 0x61, 0x63, 0x6b, 0x53, 0x74, 0x61, 0x74, 0x65, 0x12, 0x1e, 0x0a, 0x1a,
+	0x43, 0x41, 0x4c, 0x4c, 0x42, 0x41, 0x43, 0x4b, 0x5f, 0x53, 0x54, 0x41, 0x54, 0x45, 0x5f, 0x55,
+	0x4e, 0x53, 0x50, 0x45, 0x43, 0x49, 0x46, 0x49, 0x45, 0x44, 0x10, 0x00, 0x12, 0x1a, 0x0a, 0x16,
+	0x43, 0x41, 0x4c, 0x4c, 0x42, 0x41, 0x43, 0x4b, 0x5f, 0x53, 0x54, 0x41, 0x54, 0x45, 0x5f, 0x53,
+	0x54, 0x41, 0x4e, 0x44, 0x42, 0x59, 0x10, 0x01, 0x12, 0x1c, 0x0a, 0x18, 0x43, 0x41, 0x4c, 0x4c,
+	0x42, 0x41, 0x43, 0x4b, 0x5f, 0x53, 0x54, 0x41, 0x54, 0x45, 0x5f, 0x53, 0x43, 0x48, 0x45, 0x44,
+	0x55, 0x4c, 0x45, 0x44, 0x10, 0x02, 0x12, 0x1e, 0x0a, 0x1a, 0x43, 0x41, 0x4c, 0x4c, 0x42, 0x41,
+	0x43, 0x4b, 0x5f, 0x53, 0x54, 0x41, 0x54, 0x45, 0x5f, 0x42, 0x41, 0x43, 0x4b, 0x49, 0x4e, 0x47,
+	0x5f, 0x4f, 0x46, 0x46, 0x10, 0x03, 0x12, 0x19, 0x0a, 0x15, 0x43, 0x41, 0x4c, 0x4c, 0x42, 0x41,
+	0x43, 0x4b, 0x5f, 0x53, 0x54, 0x41, 0x54, 0x45, 0x5f, 0x46, 0x41, 0x49, 0x4c, 0x45, 0x44, 0x10,
+	0x04, 0x12, 0x1c, 0x0a, 0x18, 0x43, 0x41, 0x4c, 0x4c, 0x42, 0x41, 0x43, 0x4b, 0x5f, 0x53, 0x54,
+	0x41, 0x54, 0x45, 0x5f, 0x53, 0x55, 0x43, 0x43, 0x45, 0x45, 0x44, 0x45, 0x44, 0x10, 0x05, 0x42,
+	0x2a, 0x5a, 0x28, 0x67, 0x6f, 0x2e, 0x74, 0x65, 0x6d, 0x70, 0x6f, 0x72, 0x61, 0x6c, 0x2e, 0x69,
+	0x6f, 0x2f, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x2f, 0x61, 0x70, 0x69, 0x2f, 0x65, 0x6e, 0x75,
+	0x6d, 0x73, 0x2f, 0x76, 0x31, 0x3b, 0x65, 0x6e, 0x75, 0x6d, 0x73, 0x62, 0x06, 0x70, 0x72, 0x6f,
+	0x74, 0x6f, 0x33,
 }
 
 var (
@@ -361,12 +657,16 @@ func file_temporal_server_api_enums_v1_common_proto_rawDescGZIP() []byte {
 	return file_temporal_server_api_enums_v1_common_proto_rawDescData
 }
 
-var file_temporal_server_api_enums_v1_common_proto_enumTypes = make([]protoimpl.EnumInfo, 4)
+var file_temporal_server_api_enums_v1_common_proto_enumTypes = make([]protoimpl.EnumInfo, 8)
 var file_temporal_server_api_enums_v1_common_proto_goTypes = []interface{}{
-	(DeadLetterQueueType)(0), // 0: temporal.server.api.enums.v1.DeadLetterQueueType
-	(ChecksumFlavor)(0),      // 1: temporal.server.api.enums.v1.ChecksumFlavor
-	(SchedulerState)(0),      // 2: temporal.server.api.enums.v1.SchedulerState
-	(CallbackState)(0),       // 3: temporal.server.api.enums.v1.CallbackState
+	(DeadLetterQueueType)(0),      // 0: temporal.server.api.enums.v1.DeadLetterQueueType
+	(ChecksumFlavor)(0),           // 1: temporal.server.api.enums.v1.ChecksumFlavor
+	(SchedulerState)(0),           // 2: temporal.server.api.enums.v1.SchedulerState
+	(Scheduler2State)(0),          // 3: temporal.server.api.enums.v1.Scheduler2State
+	(SchedulerGeneratorState)(0),  // 4: temporal.server.api.enums.v1.SchedulerGeneratorState
+	(SchedulerExecutorState)(0),   // 5: temporal.server.api.enums.v1.SchedulerExecutorState
+	(SchedulerBackfillerState)(0), // 6: temporal.server.api.enums.v1.SchedulerBackfillerState
+	(CallbackState)(0),            // 7: temporal.server.api.enums.v1.CallbackState
 }
 var file_temporal_server_api_enums_v1_common_proto_depIdxs = []int32{
 	0, // [0:0] is the sub-list for method output_type
@@ -386,7 +686,7 @@ func file_temporal_server_api_enums_v1_common_proto_init() {
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_temporal_server_api_enums_v1_common_proto_rawDesc,
-			NumEnums:      4,
+			NumEnums:      8,
 			NumMessages:   0,
 			NumExtensions: 0,
 			NumServices:   0,
diff --git a/api/schedule/v1/message.go-helpers.pb.go b/api/schedule/v1/message.go-helpers.pb.go
index 00c73164065..f0f874651f9 100644
--- a/api/schedule/v1/message.go-helpers.pb.go
+++ b/api/schedule/v1/message.go-helpers.pb.go
@@ -509,3 +509,151 @@ func (this *HsmSchedulerState) Equal(that interface{}) bool {
 
 	return proto.Equal(this, that1)
 }
+
+// Marshal an object of type HsmSchedulerV2State to the protobuf v3 wire format
+func (val *HsmSchedulerV2State) Marshal() ([]byte, error) {
+	return proto.Marshal(val)
+}
+
+// Unmarshal an object of type HsmSchedulerV2State from the protobuf v3 wire format
+func (val *HsmSchedulerV2State) Unmarshal(buf []byte) error {
+	return proto.Unmarshal(buf, val)
+}
+
+// Size returns the size of the object, in bytes, once serialized
+func (val *HsmSchedulerV2State) Size() int {
+	return proto.Size(val)
+}
+
+// Equal returns whether two HsmSchedulerV2State values are equivalent by recursively
+// comparing the message's fields.
+// For more information see the documentation for
+// https://pkg.go.dev/google.golang.org/protobuf/proto#Equal
+func (this *HsmSchedulerV2State) Equal(that interface{}) bool {
+	if that == nil {
+		return this == nil
+	}
+
+	var that1 *HsmSchedulerV2State
+	switch t := that.(type) {
+	case *HsmSchedulerV2State:
+		that1 = t
+	case HsmSchedulerV2State:
+		that1 = &t
+	default:
+		return false
+	}
+
+	return proto.Equal(this, that1)
+}
+
+// Marshal an object of type GeneratorInternalState to the protobuf v3 wire format
+func (val *GeneratorInternalState) Marshal() ([]byte, error) {
+	return proto.Marshal(val)
+}
+
+// Unmarshal an object of type GeneratorInternalState from the protobuf v3 wire format
+func (val *GeneratorInternalState) Unmarshal(buf []byte) error {
+	return proto.Unmarshal(buf, val)
+}
+
+// Size returns the size of the object, in bytes, once serialized
+func (val *GeneratorInternalState) Size() int {
+	return proto.Size(val)
+}
+
+// Equal returns whether two GeneratorInternalState values are equivalent by recursively
+// comparing the message's fields.
+// For more information see the documentation for
+// https://pkg.go.dev/google.golang.org/protobuf/proto#Equal
+func (this *GeneratorInternalState) Equal(that interface{}) bool {
+	if that == nil {
+		return this == nil
+	}
+
+	var that1 *GeneratorInternalState
+	switch t := that.(type) {
+	case *GeneratorInternalState:
+		that1 = t
+	case GeneratorInternalState:
+		that1 = &t
+	default:
+		return false
+	}
+
+	return proto.Equal(this, that1)
+}
+
+// Marshal an object of type ExecutorInternalState to the protobuf v3 wire format
+func (val *ExecutorInternalState) Marshal() ([]byte, error) {
+	return proto.Marshal(val)
+}
+
+// Unmarshal an object of type ExecutorInternalState from the protobuf v3 wire format
+func (val *ExecutorInternalState) Unmarshal(buf []byte) error {
+	return proto.Unmarshal(buf, val)
+}
+
+// Size returns the size of the object, in bytes, once serialized
+func (val *ExecutorInternalState) Size() int {
+	return proto.Size(val)
+}
+
+// Equal returns whether two ExecutorInternalState values are equivalent by recursively
+// comparing the message's fields.
+// For more information see the documentation for
+// https://pkg.go.dev/google.golang.org/protobuf/proto#Equal
+func (this *ExecutorInternalState) Equal(that interface{}) bool {
+	if that == nil {
+		return this == nil
+	}
+
+	var that1 *ExecutorInternalState
+	switch t := that.(type) {
+	case *ExecutorInternalState:
+		that1 = t
+	case ExecutorInternalState:
+		that1 = &t
+	default:
+		return false
+	}
+
+	return proto.Equal(this, that1)
+}
+
+// Marshal an object of type BackfillerInternalState to the protobuf v3 wire format
+func (val *BackfillerInternalState) Marshal() ([]byte, error) {
+	return proto.Marshal(val)
+}
+
+// Unmarshal an object of type BackfillerInternalState from the protobuf v3 wire format
+func (val *BackfillerInternalState) Unmarshal(buf []byte) error {
+	return proto.Unmarshal(buf, val)
+}
+
+// Size returns the size of the object, in bytes, once serialized
+func (val *BackfillerInternalState) Size() int {
+	return proto.Size(val)
+}
+
+// Equal returns whether two BackfillerInternalState values are equivalent by recursively
+// comparing the message's fields.
+// For more information see the documentation for
+// https://pkg.go.dev/google.golang.org/protobuf/proto#Equal
+func (this *BackfillerInternalState) Equal(that interface{}) bool {
+	if that == nil {
+		return this == nil
+	}
+
+	var that1 *BackfillerInternalState
+	switch t := that.(type) {
+	case *BackfillerInternalState:
+		that1 = t
+	case BackfillerInternalState:
+		that1 = &t
+	default:
+		return false
+	}
+
+	return proto.Equal(this, that1)
+}
diff --git a/api/schedule/v1/message.pb.go b/api/schedule/v1/message.pb.go
index 69ca1f5c92b..e341eb1d648 100644
--- a/api/schedule/v1/message.pb.go
+++ b/api/schedule/v1/message.pb.go
@@ -66,6 +66,9 @@ type BufferedStart struct {
 	OverlapPolicy v1.ScheduleOverlapPolicy `protobuf:"varint,3,opt,name=overlap_policy,json=overlapPolicy,proto3,enum=temporal.api.enums.v1.ScheduleOverlapPolicy" json:"overlap_policy,omitempty"`
 	// Trigger-immediately or backfill
 	Manual bool `protobuf:"varint,4,opt,name=manual,proto3" json:"manual,omitempty"`
+	// An ID generated when the action is buffered for deduplication during
+	// execution. Only used by the V2 Scheduler (otherwise left empty).
+	RequestId string `protobuf:"bytes,6,opt,name=request_id,json=requestId,proto3" json:"request_id,omitempty"`
 }
 
 func (x *BufferedStart) Reset() {
@@ -135,6 +138,13 @@ func (x *BufferedStart) GetManual() bool {
 	return false
 }
 
+func (x *BufferedStart) GetRequestId() string {
+	if x != nil {
+		return x.RequestId
+	}
+	return ""
+}
+
 type InternalState struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -1019,6 +1029,316 @@ func (x *HsmSchedulerState) GetNextInvocationTime() *timestamppb.Timestamp {
 	return nil
 }
 
+// V2 Scheduler state
+type HsmSchedulerV2State struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	State v15.Scheduler2State `protobuf:"varint,1,opt,name=state,proto3,enum=temporal.server.api.enums.v1.Scheduler2State" json:"state,omitempty"`
+	// scheduler request parameters and metadata.
+	Schedule     *v11.Schedule      `protobuf:"bytes,2,opt,name=schedule,proto3" json:"schedule,omitempty"`
+	Info         *v11.ScheduleInfo  `protobuf:"bytes,3,opt,name=info,proto3" json:"info,omitempty"`
+	InitialPatch *v11.SchedulePatch `protobuf:"bytes,4,opt,name=initial_patch,json=initialPatch,proto3" json:"initial_patch,omitempty"`
+	// state common to all generators is stored in the toplevel machine
+	Namespace   string `protobuf:"bytes,5,opt,name=namespace,proto3" json:"namespace,omitempty"`
+	NamespaceId string `protobuf:"bytes,6,opt,name=namespace_id,json=namespaceId,proto3" json:"namespace_id,omitempty"`
+	ScheduleId  string `protobuf:"bytes,7,opt,name=schedule_id,json=scheduleId,proto3" json:"schedule_id,omitempty"`
+	// Implemented as a sequence number. Useful for substate machines to
+	// invalidate transactions based on update requests
+	ConflictToken int64 `protobuf:"varint,8,opt,name=conflict_token,json=conflictToken,proto3" json:"conflict_token,omitempty"`
+}
+
+func (x *HsmSchedulerV2State) Reset() {
+	*x = HsmSchedulerV2State{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_temporal_server_api_schedule_v1_message_proto_msgTypes[13]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *HsmSchedulerV2State) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*HsmSchedulerV2State) ProtoMessage() {}
+
+func (x *HsmSchedulerV2State) ProtoReflect() protoreflect.Message {
+	mi := &file_temporal_server_api_schedule_v1_message_proto_msgTypes[13]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use HsmSchedulerV2State.ProtoReflect.Descriptor instead.
+func (*HsmSchedulerV2State) Descriptor() ([]byte, []int) {
+	return file_temporal_server_api_schedule_v1_message_proto_rawDescGZIP(), []int{13}
+}
+
+func (x *HsmSchedulerV2State) GetState() v15.Scheduler2State {
+	if x != nil {
+		return x.State
+	}
+	return v15.Scheduler2State(0)
+}
+
+func (x *HsmSchedulerV2State) GetSchedule() *v11.Schedule {
+	if x != nil {
+		return x.Schedule
+	}
+	return nil
+}
+
+func (x *HsmSchedulerV2State) GetInfo() *v11.ScheduleInfo {
+	if x != nil {
+		return x.Info
+	}
+	return nil
+}
+
+func (x *HsmSchedulerV2State) GetInitialPatch() *v11.SchedulePatch {
+	if x != nil {
+		return x.InitialPatch
+	}
+	return nil
+}
+
+func (x *HsmSchedulerV2State) GetNamespace() string {
+	if x != nil {
+		return x.Namespace
+	}
+	return ""
+}
+
+func (x *HsmSchedulerV2State) GetNamespaceId() string {
+	if x != nil {
+		return x.NamespaceId
+	}
+	return ""
+}
+
+func (x *HsmSchedulerV2State) GetScheduleId() string {
+	if x != nil {
+		return x.ScheduleId
+	}
+	return ""
+}
+
+func (x *HsmSchedulerV2State) GetConflictToken() int64 {
+	if x != nil {
+		return x.ConflictToken
+	}
+	return 0
+}
+
+// V2 Scheduler Generator state
+type GeneratorInternalState struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	State v15.SchedulerGeneratorState `protobuf:"varint,1,opt,name=state,proto3,enum=temporal.server.api.enums.v1.SchedulerGeneratorState" json:"state,omitempty"`
+	// waiting state waits for the next_invocation_time before transitioning to buffering
+	NextInvocationTime *timestamppb.Timestamp `protobuf:"bytes,2,opt,name=next_invocation_time,json=nextInvocationTime,proto3" json:"next_invocation_time,omitempty"`
+	// high water mark
+	LastProcessedTime *timestamppb.Timestamp `protobuf:"bytes,3,opt,name=last_processed_time,json=lastProcessedTime,proto3" json:"last_processed_time,omitempty"`
+	// Implemented as a sequence number. Useful for invalidating a stale
+	// Generator persisted state write.
+	ConflictToken int64 `protobuf:"varint,4,opt,name=conflict_token,json=conflictToken,proto3" json:"conflict_token,omitempty"`
+}
+
+func (x *GeneratorInternalState) Reset() {
+	*x = GeneratorInternalState{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_temporal_server_api_schedule_v1_message_proto_msgTypes[14]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *GeneratorInternalState) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*GeneratorInternalState) ProtoMessage() {}
+
+func (x *GeneratorInternalState) ProtoReflect() protoreflect.Message {
+	mi := &file_temporal_server_api_schedule_v1_message_proto_msgTypes[14]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use GeneratorInternalState.ProtoReflect.Descriptor instead.
+func (*GeneratorInternalState) Descriptor() ([]byte, []int) {
+	return file_temporal_server_api_schedule_v1_message_proto_rawDescGZIP(), []int{14}
+}
+
+func (x *GeneratorInternalState) GetState() v15.SchedulerGeneratorState {
+	if x != nil {
+		return x.State
+	}
+	return v15.SchedulerGeneratorState(0)
+}
+
+func (x *GeneratorInternalState) GetNextInvocationTime() *timestamppb.Timestamp {
+	if x != nil {
+		return x.NextInvocationTime
+	}
+	return nil
+}
+
+func (x *GeneratorInternalState) GetLastProcessedTime() *timestamppb.Timestamp {
+	if x != nil {
+		return x.LastProcessedTime
+	}
+	return nil
+}
+
+func (x *GeneratorInternalState) GetConflictToken() int64 {
+	if x != nil {
+		return x.ConflictToken
+	}
+	return 0
+}
+
+// V2 Scheduler Executor state
+type ExecutorInternalState struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	State v15.SchedulerExecutorState `protobuf:"varint,1,opt,name=state,proto3,enum=temporal.server.api.enums.v1.SchedulerExecutorState" json:"state,omitempty"`
+	// Wakes immediately after actions are buffered, or when the deadline from
+	// the BACKING_OFF state has expired.
+	NextInvocationTime *timestamppb.Timestamp `protobuf:"bytes,2,opt,name=next_invocation_time,json=nextInvocationTime,proto3" json:"next_invocation_time,omitempty"`
+	// buffered starts that will be executed by the Executor
+	BufferedStarts []*BufferedStart `protobuf:"bytes,3,rep,name=buffered_starts,json=bufferedStarts,proto3" json:"buffered_starts,omitempty"`
+}
+
+func (x *ExecutorInternalState) Reset() {
+	*x = ExecutorInternalState{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_temporal_server_api_schedule_v1_message_proto_msgTypes[15]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ExecutorInternalState) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ExecutorInternalState) ProtoMessage() {}
+
+func (x *ExecutorInternalState) ProtoReflect() protoreflect.Message {
+	mi := &file_temporal_server_api_schedule_v1_message_proto_msgTypes[15]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ExecutorInternalState.ProtoReflect.Descriptor instead.
+func (*ExecutorInternalState) Descriptor() ([]byte, []int) {
+	return file_temporal_server_api_schedule_v1_message_proto_rawDescGZIP(), []int{15}
+}
+
+func (x *ExecutorInternalState) GetState() v15.SchedulerExecutorState {
+	if x != nil {
+		return x.State
+	}
+	return v15.SchedulerExecutorState(0)
+}
+
+func (x *ExecutorInternalState) GetNextInvocationTime() *timestamppb.Timestamp {
+	if x != nil {
+		return x.NextInvocationTime
+	}
+	return nil
+}
+
+func (x *ExecutorInternalState) GetBufferedStarts() []*BufferedStart {
+	if x != nil {
+		return x.BufferedStarts
+	}
+	return nil
+}
+
+// V2 Scheduler Backfiller state
+type BackfillerInternalState struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	State v15.SchedulerBackfillerState `protobuf:"varint,1,opt,name=state,proto3,enum=temporal.server.api.enums.v1.SchedulerBackfillerState" json:"state,omitempty"`
+	// Wakes from wait state on the "backfill requested" event. When backing off,
+	// the next_invocation_time is used to set the timer deadline that will move
+	// out of the "backing off" state.
+	NextInvocationTime *timestamppb.Timestamp `protobuf:"bytes,2,opt,name=next_invocation_time,json=nextInvocationTime,proto3" json:"next_invocation_time,omitempty"`
+}
+
+func (x *BackfillerInternalState) Reset() {
+	*x = BackfillerInternalState{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_temporal_server_api_schedule_v1_message_proto_msgTypes[16]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *BackfillerInternalState) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*BackfillerInternalState) ProtoMessage() {}
+
+func (x *BackfillerInternalState) ProtoReflect() protoreflect.Message {
+	mi := &file_temporal_server_api_schedule_v1_message_proto_msgTypes[16]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use BackfillerInternalState.ProtoReflect.Descriptor instead.
+func (*BackfillerInternalState) Descriptor() ([]byte, []int) {
+	return file_temporal_server_api_schedule_v1_message_proto_rawDescGZIP(), []int{16}
+}
+
+func (x *BackfillerInternalState) GetState() v15.SchedulerBackfillerState {
+	if x != nil {
+		return x.State
+	}
+	return v15.SchedulerBackfillerState(0)
+}
+
+func (x *BackfillerInternalState) GetNextInvocationTime() *timestamppb.Timestamp {
+	if x != nil {
+		return x.NextInvocationTime
+	}
+	return nil
+}
+
 var File_temporal_server_api_schedule_v1_message_proto protoreflect.FileDescriptor
 
 var file_temporal_server_api_schedule_v1_message_proto_rawDesc = []byte{
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 }
 
 var (
@@ -1266,7 +1662,7 @@ func file_temporal_server_api_schedule_v1_message_proto_rawDescGZIP() []byte {
 	return file_temporal_server_api_schedule_v1_message_proto_rawDescData
 }
 
-var file_temporal_server_api_schedule_v1_message_proto_msgTypes = make([]protoimpl.MessageInfo, 13)
+var file_temporal_server_api_schedule_v1_message_proto_msgTypes = make([]protoimpl.MessageInfo, 17)
 var file_temporal_server_api_schedule_v1_message_proto_goTypes = []interface{}{
 	(*BufferedStart)(nil),                     // 0: temporal.server.api.schedule.v1.BufferedStart
 	(*InternalState)(nil),                     // 1: temporal.server.api.schedule.v1.InternalState
@@ -1281,56 +1677,76 @@ var file_temporal_server_api_schedule_v1_message_proto_goTypes = []interface{}{
 	(*TerminateWorkflowRequest)(nil),          // 10: temporal.server.api.schedule.v1.TerminateWorkflowRequest
 	(*NextTimeCache)(nil),                     // 11: temporal.server.api.schedule.v1.NextTimeCache
 	(*HsmSchedulerState)(nil),                 // 12: temporal.server.api.schedule.v1.HsmSchedulerState
-	(*timestamppb.Timestamp)(nil),             // 13: google.protobuf.Timestamp
-	(v1.ScheduleOverlapPolicy)(0),             // 14: temporal.api.enums.v1.ScheduleOverlapPolicy
-	(*v11.BackfillRequest)(nil),               // 15: temporal.api.schedule.v1.BackfillRequest
-	(*v12.Payloads)(nil),                      // 16: temporal.api.common.v1.Payloads
-	(*v13.Failure)(nil),                       // 17: temporal.api.failure.v1.Failure
-	(*v11.Schedule)(nil),                      // 18: temporal.api.schedule.v1.Schedule
-	(*v11.ScheduleInfo)(nil),                  // 19: temporal.api.schedule.v1.ScheduleInfo
-	(*v11.SchedulePatch)(nil),                 // 20: temporal.api.schedule.v1.SchedulePatch
-	(*v12.SearchAttributes)(nil),              // 21: temporal.api.common.v1.SearchAttributes
-	(*v12.WorkflowExecution)(nil),             // 22: temporal.api.common.v1.WorkflowExecution
-	(v1.WorkflowExecutionStatus)(0),           // 23: temporal.api.enums.v1.WorkflowExecutionStatus
-	(*v14.StartWorkflowExecutionRequest)(nil), // 24: temporal.api.workflowservice.v1.StartWorkflowExecutionRequest
-	(v15.SchedulerState)(0),                   // 25: temporal.server.api.enums.v1.SchedulerState
+	(*HsmSchedulerV2State)(nil),               // 13: temporal.server.api.schedule.v1.HsmSchedulerV2State
+	(*GeneratorInternalState)(nil),            // 14: temporal.server.api.schedule.v1.GeneratorInternalState
+	(*ExecutorInternalState)(nil),             // 15: temporal.server.api.schedule.v1.ExecutorInternalState
+	(*BackfillerInternalState)(nil),           // 16: temporal.server.api.schedule.v1.BackfillerInternalState
+	(*timestamppb.Timestamp)(nil),             // 17: google.protobuf.Timestamp
+	(v1.ScheduleOverlapPolicy)(0),             // 18: temporal.api.enums.v1.ScheduleOverlapPolicy
+	(*v11.BackfillRequest)(nil),               // 19: temporal.api.schedule.v1.BackfillRequest
+	(*v12.Payloads)(nil),                      // 20: temporal.api.common.v1.Payloads
+	(*v13.Failure)(nil),                       // 21: temporal.api.failure.v1.Failure
+	(*v11.Schedule)(nil),                      // 22: temporal.api.schedule.v1.Schedule
+	(*v11.ScheduleInfo)(nil),                  // 23: temporal.api.schedule.v1.ScheduleInfo
+	(*v11.SchedulePatch)(nil),                 // 24: temporal.api.schedule.v1.SchedulePatch
+	(*v12.SearchAttributes)(nil),              // 25: temporal.api.common.v1.SearchAttributes
+	(*v12.WorkflowExecution)(nil),             // 26: temporal.api.common.v1.WorkflowExecution
+	(v1.WorkflowExecutionStatus)(0),           // 27: temporal.api.enums.v1.WorkflowExecutionStatus
+	(*v14.StartWorkflowExecutionRequest)(nil), // 28: temporal.api.workflowservice.v1.StartWorkflowExecutionRequest
+	(v15.SchedulerState)(0),                   // 29: temporal.server.api.enums.v1.SchedulerState
+	(v15.Scheduler2State)(0),                  // 30: temporal.server.api.enums.v1.Scheduler2State
+	(v15.SchedulerGeneratorState)(0),          // 31: temporal.server.api.enums.v1.SchedulerGeneratorState
+	(v15.SchedulerExecutorState)(0),           // 32: temporal.server.api.enums.v1.SchedulerExecutorState
+	(v15.SchedulerBackfillerState)(0),         // 33: temporal.server.api.enums.v1.SchedulerBackfillerState
 }
 var file_temporal_server_api_schedule_v1_message_proto_depIdxs = []int32{
-	13, // 0: temporal.server.api.schedule.v1.BufferedStart.nominal_time:type_name -> google.protobuf.Timestamp
-	13, // 1: temporal.server.api.schedule.v1.BufferedStart.actual_time:type_name -> google.protobuf.Timestamp
-	13, // 2: temporal.server.api.schedule.v1.BufferedStart.desired_time:type_name -> google.protobuf.Timestamp
-	14, // 3: temporal.server.api.schedule.v1.BufferedStart.overlap_policy:type_name -> temporal.api.enums.v1.ScheduleOverlapPolicy
-	13, // 4: temporal.server.api.schedule.v1.InternalState.last_processed_time:type_name -> google.protobuf.Timestamp
+	17, // 0: temporal.server.api.schedule.v1.BufferedStart.nominal_time:type_name -> google.protobuf.Timestamp
+	17, // 1: temporal.server.api.schedule.v1.BufferedStart.actual_time:type_name -> google.protobuf.Timestamp
+	17, // 2: temporal.server.api.schedule.v1.BufferedStart.desired_time:type_name -> google.protobuf.Timestamp
+	18, // 3: temporal.server.api.schedule.v1.BufferedStart.overlap_policy:type_name -> temporal.api.enums.v1.ScheduleOverlapPolicy
+	17, // 4: temporal.server.api.schedule.v1.InternalState.last_processed_time:type_name -> google.protobuf.Timestamp
 	0,  // 5: temporal.server.api.schedule.v1.InternalState.buffered_starts:type_name -> temporal.server.api.schedule.v1.BufferedStart
-	15, // 6: temporal.server.api.schedule.v1.InternalState.ongoing_backfills:type_name -> temporal.api.schedule.v1.BackfillRequest
-	16, // 7: temporal.server.api.schedule.v1.InternalState.last_completion_result:type_name -> temporal.api.common.v1.Payloads
-	17, // 8: temporal.server.api.schedule.v1.InternalState.continued_failure:type_name -> temporal.api.failure.v1.Failure
-	18, // 9: temporal.server.api.schedule.v1.StartScheduleArgs.schedule:type_name -> temporal.api.schedule.v1.Schedule
-	19, // 10: temporal.server.api.schedule.v1.StartScheduleArgs.info:type_name -> temporal.api.schedule.v1.ScheduleInfo
-	20, // 11: temporal.server.api.schedule.v1.StartScheduleArgs.initial_patch:type_name -> temporal.api.schedule.v1.SchedulePatch
+	19, // 6: temporal.server.api.schedule.v1.InternalState.ongoing_backfills:type_name -> temporal.api.schedule.v1.BackfillRequest
+	20, // 7: temporal.server.api.schedule.v1.InternalState.last_completion_result:type_name -> temporal.api.common.v1.Payloads
+	21, // 8: temporal.server.api.schedule.v1.InternalState.continued_failure:type_name -> temporal.api.failure.v1.Failure
+	22, // 9: temporal.server.api.schedule.v1.StartScheduleArgs.schedule:type_name -> temporal.api.schedule.v1.Schedule
+	23, // 10: temporal.server.api.schedule.v1.StartScheduleArgs.info:type_name -> temporal.api.schedule.v1.ScheduleInfo
+	24, // 11: temporal.server.api.schedule.v1.StartScheduleArgs.initial_patch:type_name -> temporal.api.schedule.v1.SchedulePatch
 	1,  // 12: temporal.server.api.schedule.v1.StartScheduleArgs.state:type_name -> temporal.server.api.schedule.v1.InternalState
-	18, // 13: temporal.server.api.schedule.v1.FullUpdateRequest.schedule:type_name -> temporal.api.schedule.v1.Schedule
-	21, // 14: temporal.server.api.schedule.v1.FullUpdateRequest.search_attributes:type_name -> temporal.api.common.v1.SearchAttributes
-	18, // 15: temporal.server.api.schedule.v1.DescribeResponse.schedule:type_name -> temporal.api.schedule.v1.Schedule
-	19, // 16: temporal.server.api.schedule.v1.DescribeResponse.info:type_name -> temporal.api.schedule.v1.ScheduleInfo
-	22, // 17: temporal.server.api.schedule.v1.WatchWorkflowRequest.execution:type_name -> temporal.api.common.v1.WorkflowExecution
-	23, // 18: temporal.server.api.schedule.v1.WatchWorkflowResponse.status:type_name -> temporal.api.enums.v1.WorkflowExecutionStatus
-	16, // 19: temporal.server.api.schedule.v1.WatchWorkflowResponse.result:type_name -> temporal.api.common.v1.Payloads
-	17, // 20: temporal.server.api.schedule.v1.WatchWorkflowResponse.failure:type_name -> temporal.api.failure.v1.Failure
-	13, // 21: temporal.server.api.schedule.v1.WatchWorkflowResponse.close_time:type_name -> google.protobuf.Timestamp
-	24, // 22: temporal.server.api.schedule.v1.StartWorkflowRequest.request:type_name -> temporal.api.workflowservice.v1.StartWorkflowExecutionRequest
-	13, // 23: temporal.server.api.schedule.v1.StartWorkflowResponse.real_start_time:type_name -> google.protobuf.Timestamp
-	22, // 24: temporal.server.api.schedule.v1.CancelWorkflowRequest.execution:type_name -> temporal.api.common.v1.WorkflowExecution
-	22, // 25: temporal.server.api.schedule.v1.TerminateWorkflowRequest.execution:type_name -> temporal.api.common.v1.WorkflowExecution
-	13, // 26: temporal.server.api.schedule.v1.NextTimeCache.start_time:type_name -> google.protobuf.Timestamp
+	22, // 13: temporal.server.api.schedule.v1.FullUpdateRequest.schedule:type_name -> temporal.api.schedule.v1.Schedule
+	25, // 14: temporal.server.api.schedule.v1.FullUpdateRequest.search_attributes:type_name -> temporal.api.common.v1.SearchAttributes
+	22, // 15: temporal.server.api.schedule.v1.DescribeResponse.schedule:type_name -> temporal.api.schedule.v1.Schedule
+	23, // 16: temporal.server.api.schedule.v1.DescribeResponse.info:type_name -> temporal.api.schedule.v1.ScheduleInfo
+	26, // 17: temporal.server.api.schedule.v1.WatchWorkflowRequest.execution:type_name -> temporal.api.common.v1.WorkflowExecution
+	27, // 18: temporal.server.api.schedule.v1.WatchWorkflowResponse.status:type_name -> temporal.api.enums.v1.WorkflowExecutionStatus
+	20, // 19: temporal.server.api.schedule.v1.WatchWorkflowResponse.result:type_name -> temporal.api.common.v1.Payloads
+	21, // 20: temporal.server.api.schedule.v1.WatchWorkflowResponse.failure:type_name -> temporal.api.failure.v1.Failure
+	17, // 21: temporal.server.api.schedule.v1.WatchWorkflowResponse.close_time:type_name -> google.protobuf.Timestamp
+	28, // 22: temporal.server.api.schedule.v1.StartWorkflowRequest.request:type_name -> temporal.api.workflowservice.v1.StartWorkflowExecutionRequest
+	17, // 23: temporal.server.api.schedule.v1.StartWorkflowResponse.real_start_time:type_name -> google.protobuf.Timestamp
+	26, // 24: temporal.server.api.schedule.v1.CancelWorkflowRequest.execution:type_name -> temporal.api.common.v1.WorkflowExecution
+	26, // 25: temporal.server.api.schedule.v1.TerminateWorkflowRequest.execution:type_name -> temporal.api.common.v1.WorkflowExecution
+	17, // 26: temporal.server.api.schedule.v1.NextTimeCache.start_time:type_name -> google.protobuf.Timestamp
 	2,  // 27: temporal.server.api.schedule.v1.HsmSchedulerState.args:type_name -> temporal.server.api.schedule.v1.StartScheduleArgs
-	25, // 28: temporal.server.api.schedule.v1.HsmSchedulerState.hsm_state:type_name -> temporal.server.api.enums.v1.SchedulerState
-	13, // 29: temporal.server.api.schedule.v1.HsmSchedulerState.next_invocation_time:type_name -> google.protobuf.Timestamp
-	30, // [30:30] is the sub-list for method output_type
-	30, // [30:30] is the sub-list for method input_type
-	30, // [30:30] is the sub-list for extension type_name
-	30, // [30:30] is the sub-list for extension extendee
-	0,  // [0:30] is the sub-list for field type_name
+	29, // 28: temporal.server.api.schedule.v1.HsmSchedulerState.hsm_state:type_name -> temporal.server.api.enums.v1.SchedulerState
+	17, // 29: temporal.server.api.schedule.v1.HsmSchedulerState.next_invocation_time:type_name -> google.protobuf.Timestamp
+	30, // 30: temporal.server.api.schedule.v1.HsmSchedulerV2State.state:type_name -> temporal.server.api.enums.v1.Scheduler2State
+	22, // 31: temporal.server.api.schedule.v1.HsmSchedulerV2State.schedule:type_name -> temporal.api.schedule.v1.Schedule
+	23, // 32: temporal.server.api.schedule.v1.HsmSchedulerV2State.info:type_name -> temporal.api.schedule.v1.ScheduleInfo
+	24, // 33: temporal.server.api.schedule.v1.HsmSchedulerV2State.initial_patch:type_name -> temporal.api.schedule.v1.SchedulePatch
+	31, // 34: temporal.server.api.schedule.v1.GeneratorInternalState.state:type_name -> temporal.server.api.enums.v1.SchedulerGeneratorState
+	17, // 35: temporal.server.api.schedule.v1.GeneratorInternalState.next_invocation_time:type_name -> google.protobuf.Timestamp
+	17, // 36: temporal.server.api.schedule.v1.GeneratorInternalState.last_processed_time:type_name -> google.protobuf.Timestamp
+	32, // 37: temporal.server.api.schedule.v1.ExecutorInternalState.state:type_name -> temporal.server.api.enums.v1.SchedulerExecutorState
+	17, // 38: temporal.server.api.schedule.v1.ExecutorInternalState.next_invocation_time:type_name -> google.protobuf.Timestamp
+	0,  // 39: temporal.server.api.schedule.v1.ExecutorInternalState.buffered_starts:type_name -> temporal.server.api.schedule.v1.BufferedStart
+	33, // 40: temporal.server.api.schedule.v1.BackfillerInternalState.state:type_name -> temporal.server.api.enums.v1.SchedulerBackfillerState
+	17, // 41: temporal.server.api.schedule.v1.BackfillerInternalState.next_invocation_time:type_name -> google.protobuf.Timestamp
+	42, // [42:42] is the sub-list for method output_type
+	42, // [42:42] is the sub-list for method input_type
+	42, // [42:42] is the sub-list for extension type_name
+	42, // [42:42] is the sub-list for extension extendee
+	0,  // [0:42] is the sub-list for field type_name
 }
 
 func init() { file_temporal_server_api_schedule_v1_message_proto_init() }
@@ -1495,6 +1911,54 @@ func file_temporal_server_api_schedule_v1_message_proto_init() {
 				return nil
 			}
 		}
+		file_temporal_server_api_schedule_v1_message_proto_msgTypes[13].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*HsmSchedulerV2State); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_temporal_server_api_schedule_v1_message_proto_msgTypes[14].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*GeneratorInternalState); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_temporal_server_api_schedule_v1_message_proto_msgTypes[15].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ExecutorInternalState); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_temporal_server_api_schedule_v1_message_proto_msgTypes[16].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*BackfillerInternalState); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
 	}
 	file_temporal_server_api_schedule_v1_message_proto_msgTypes[6].OneofWrappers = []interface{}{
 		(*WatchWorkflowResponse_Result)(nil),
@@ -1506,7 +1970,7 @@ func file_temporal_server_api_schedule_v1_message_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_temporal_server_api_schedule_v1_message_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   13,
+			NumMessages:   17,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
diff --git a/proto/internal/temporal/server/api/enums/v1/common.proto b/proto/internal/temporal/server/api/enums/v1/common.proto
index ecf64dc435d..fc4a74be8fd 100644
--- a/proto/internal/temporal/server/api/enums/v1/common.proto
+++ b/proto/internal/temporal/server/api/enums/v1/common.proto
@@ -47,6 +47,47 @@ enum SchedulerState {
     SCHEDULER_STATE_EXECUTING = 2;
 }
 
+enum Scheduler2State {
+    // Default value, unspecified state.
+    SCHEDULER2_STATE_UNSPECIFIED = 0;
+    // Scheduler's top-level state machine has been initialized and is running
+    SCHEDULER2_STATE_RUNNING = 1;
+}
+
+// State for the V2 Scheduler's Generator substate machine.
+enum SchedulerGeneratorState {
+    // Default value, unspecified state.
+    SCHEDULER_GENERATOR_STATE_UNSPECIFIED = 0;
+    // Generator is waiting to be activated after the specified amount of time.
+    SCHEDULER_GENERATOR_STATE_WAITING = 1;
+    // Generator is buffering actions.
+    SCHEDULER_GENERATOR_STATE_BUFFERING = 2;
+}
+
+// State for the V2 Scheduler's Executor substate machine.
+enum SchedulerExecutorState {
+    // Default value, unspecified state.
+    SCHEDULER_EXECUTOR_STATE_UNSPECIFIED = 0;
+    // Executor is awaiting actions to be buffered and eligible for execution.
+    SCHEDULER_EXECUTOR_STATE_WAITING = 1;
+    // Executor is starting actions.
+    SCHEDULER_EXECUTOR_STATE_EXECUTING = 2;
+    // Executor is backing off from executing actions.
+    SCHEDULER_EXECUTOR_STATE_BACKING_OFF = 3;
+}
+
+// State for the V2 Scheduler's Backfiller substate machine.
+enum SchedulerBackfillerState {
+    // Default value, unspecified state.
+    SCHEDULER_BACKFILLER_STATE_UNSPECIFIED = 0;
+    // Backfiller is awaiting backfill to be requested.
+    SCHEDULER_BACKFILLER_STATE_WAITING = 1;
+    // Backfiller is actively starting actions.
+    SCHEDULER_BACKFILLER_STATE_EXECUTING = 2;
+    // Backfiller is backing off from starting actions.
+    SCHEDULER_BACKFILLER_STATE_BACKING_OFF = 3;
+}
+
 // State of a callback.
 enum CallbackState {
     // Default value, unspecified state.
diff --git a/proto/internal/temporal/server/api/schedule/v1/message.proto b/proto/internal/temporal/server/api/schedule/v1/message.proto
index ae72f79a3d3..a56dff85525 100644
--- a/proto/internal/temporal/server/api/schedule/v1/message.proto
+++ b/proto/internal/temporal/server/api/schedule/v1/message.proto
@@ -48,6 +48,9 @@ message BufferedStart {
     temporal.api.enums.v1.ScheduleOverlapPolicy overlap_policy = 3;
     // Trigger-immediately or backfill
     bool manual = 4;
+    // An ID generated when the action is buffered for deduplication during
+    // execution. Only used by the V2 Scheduler (otherwise left empty).
+    string request_id = 6;
 }
 
 message InternalState {
@@ -155,3 +158,59 @@ message HsmSchedulerState {
     google.protobuf.Timestamp next_invocation_time = 3;
 
 }
+
+// V2 Scheduler state
+message HsmSchedulerV2State {
+    temporal.server.api.enums.v1.Scheduler2State state = 1;
+
+    // scheduler request parameters and metadata. 
+    temporal.api.schedule.v1.Schedule schedule = 2;
+    temporal.api.schedule.v1.ScheduleInfo info = 3;
+    temporal.api.schedule.v1.SchedulePatch initial_patch = 4;
+
+    // state common to all generators is stored in the toplevel machine
+    string namespace = 5;
+    string namespace_id = 6;
+    string schedule_id = 7;
+
+    // Implemented as a sequence number. Useful for substate machines to
+    // invalidate transactions based on update requests
+    int64 conflict_token = 8;
+}
+
+// V2 Scheduler Generator state
+message GeneratorInternalState {
+    temporal.server.api.enums.v1.SchedulerGeneratorState state = 1;
+
+    // waiting state waits for the next_invocation_time before transitioning to buffering
+    google.protobuf.Timestamp next_invocation_time = 2;
+
+    // high water mark
+    google.protobuf.Timestamp last_processed_time = 3;
+
+    // Implemented as a sequence number. Useful for invalidating a stale
+    // Generator persisted state write.
+    int64 conflict_token = 4;
+}
+
+// V2 Scheduler Executor state
+message ExecutorInternalState {
+    temporal.server.api.enums.v1.SchedulerExecutorState state = 1;
+
+    // Wakes immediately after actions are buffered, or when the deadline from
+    // the BACKING_OFF state has expired.
+    google.protobuf.Timestamp next_invocation_time = 2;
+
+    // buffered starts that will be executed by the Executor
+    repeated BufferedStart buffered_starts = 3;
+}
+
+// V2 Scheduler Backfiller state
+message BackfillerInternalState {
+    temporal.server.api.enums.v1.SchedulerBackfillerState state = 1;
+
+    // Wakes from wait state on the "backfill requested" event. When backing off,
+    // the next_invocation_time is used to set the timer deadline that will move
+    // out of the "backing off" state.
+    google.protobuf.Timestamp next_invocation_time = 2;
+}