diff --git a/go/test_platform/result_flow/test_runner.pb.go b/go/test_platform/result_flow/test_runner.pb.go
new file mode 100644
index 0000000..20ca6ea
--- /dev/null
+++ b/go/test_platform/result_flow/test_runner.pb.go
@@ -0,0 +1,167 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: test_platform/result_flow/test_runner.proto
+
+package result_flow
+
+import (
+	fmt "fmt"
+	proto "github.com/golang/protobuf/proto"
+	timestamp "github.com/golang/protobuf/ptypes/timestamp"
+	math "math"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
+
+// TestRunnerRequest defines the input of `result_flow test_runner`.
+type TestRunnerRequest struct {
+	// The source config for fetching the test runner builds.
+	TestRunner *Source `protobuf:"bytes,1,opt,name=test_runner,json=testRunner,proto3" json:"test_runner,omitempty"`
+	// The target to upload test run results.
+	TestRun *Target `protobuf:"bytes,2,opt,name=test_run,json=testRun,proto3" json:"test_run,omitempty"`
+	// The target to upload test case results.
+	TestCase *Target `protobuf:"bytes,3,opt,name=test_case,json=testCase,proto3" json:"test_case,omitempty"`
+	// Hard deadline for execution.
+	//
+	// TestRunner command should abort beyond this deadline.
+	Deadline             *timestamp.Timestamp `protobuf:"bytes,4,opt,name=deadline,proto3" json:"deadline,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}             `json:"-"`
+	XXX_unrecognized     []byte               `json:"-"`
+	XXX_sizecache        int32                `json:"-"`
+}
+
+func (m *TestRunnerRequest) Reset()         { *m = TestRunnerRequest{} }
+func (m *TestRunnerRequest) String() string { return proto.CompactTextString(m) }
+func (*TestRunnerRequest) ProtoMessage()    {}
+func (*TestRunnerRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_df9f4b468bf4599d, []int{0}
+}
+
+func (m *TestRunnerRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_TestRunnerRequest.Unmarshal(m, b)
+}
+func (m *TestRunnerRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_TestRunnerRequest.Marshal(b, m, deterministic)
+}
+func (m *TestRunnerRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_TestRunnerRequest.Merge(m, src)
+}
+func (m *TestRunnerRequest) XXX_Size() int {
+	return xxx_messageInfo_TestRunnerRequest.Size(m)
+}
+func (m *TestRunnerRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_TestRunnerRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_TestRunnerRequest proto.InternalMessageInfo
+
+func (m *TestRunnerRequest) GetTestRunner() *Source {
+	if m != nil {
+		return m.TestRunner
+	}
+	return nil
+}
+
+func (m *TestRunnerRequest) GetTestRun() *Target {
+	if m != nil {
+		return m.TestRun
+	}
+	return nil
+}
+
+func (m *TestRunnerRequest) GetTestCase() *Target {
+	if m != nil {
+		return m.TestCase
+	}
+	return nil
+}
+
+func (m *TestRunnerRequest) GetDeadline() *timestamp.Timestamp {
+	if m != nil {
+		return m.Deadline
+	}
+	return nil
+}
+
+// TestRunnerResponse defines the output of `result_flow test_runner`.
+type TestRunnerResponse struct {
+	// `result_flow test_runner` exits with exit code 0 unless there is an
+	// infrastructure failure. When the exit code is 0, `state` indicates the
+	// best known state of the test_runner command execution (see comments on State enum).
+	State                State    `protobuf:"varint,1,opt,name=state,proto3,enum=test_platform.result_flow.State" json:"state,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *TestRunnerResponse) Reset()         { *m = TestRunnerResponse{} }
+func (m *TestRunnerResponse) String() string { return proto.CompactTextString(m) }
+func (*TestRunnerResponse) ProtoMessage()    {}
+func (*TestRunnerResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_df9f4b468bf4599d, []int{1}
+}
+
+func (m *TestRunnerResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_TestRunnerResponse.Unmarshal(m, b)
+}
+func (m *TestRunnerResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_TestRunnerResponse.Marshal(b, m, deterministic)
+}
+func (m *TestRunnerResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_TestRunnerResponse.Merge(m, src)
+}
+func (m *TestRunnerResponse) XXX_Size() int {
+	return xxx_messageInfo_TestRunnerResponse.Size(m)
+}
+func (m *TestRunnerResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_TestRunnerResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_TestRunnerResponse proto.InternalMessageInfo
+
+func (m *TestRunnerResponse) GetState() State {
+	if m != nil {
+		return m.State
+	}
+	return State_STATE_UNSPECIFIED
+}
+
+func init() {
+	proto.RegisterType((*TestRunnerRequest)(nil), "test_platform.result_flow.TestRunnerRequest")
+	proto.RegisterType((*TestRunnerResponse)(nil), "test_platform.result_flow.TestRunnerResponse")
+}
+
+func init() {
+	proto.RegisterFile("test_platform/result_flow/test_runner.proto", fileDescriptor_df9f4b468bf4599d)
+}
+
+var fileDescriptor_df9f4b468bf4599d = []byte{
+	// 289 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x8c, 0x91, 0x41, 0x4b, 0x33, 0x31,
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+	0x81, 0x0a, 0x9e, 0xc4, 0x43, 0x8b, 0x37, 0x4f, 0x71, 0x4f, 0x5e, 0x4a, 0xba, 0x9d, 0x8d, 0x0b,
+	0x9b, 0xcc, 0x9a, 0x4c, 0xf0, 0x57, 0xf8, 0x9f, 0xc5, 0xac, 0x5b, 0xd6, 0xc3, 0xaa, 0xc7, 0x61,
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+	0x42, 0xac, 0x69, 0x53, 0xd6, 0xf8, 0x26, 0x53, 0xc7, 0x47, 0xe7, 0xc0, 0x8b, 0xc6, 0x23, 0x21,
+	0x3f, 0xfb, 0x06, 0x8b, 0x1e, 0x3c, 0xbb, 0x1c, 0xf6, 0x14, 0x68, 0x2d, 0xba, 0x56, 0x31, 0x3b,
+	0x37, 0x88, 0xa6, 0x06, 0x99, 0xaa, 0x6d, 0x2c, 0x25, 0x55, 0x16, 0x02, 0x69, 0xdb, 0xb4, 0xc0,
+	0xe2, 0x7d, 0xcc, 0x4e, 0x73, 0x08, 0xa4, 0xd2, 0x62, 0x05, 0xaf, 0x11, 0x02, 0xf1, 0x15, 0x9b,
+	0xf6, 0xce, 0xc9, 0x46, 0xf3, 0xd1, 0xd5, 0x74, 0x79, 0x21, 0x06, 0xef, 0x11, 0x4f, 0x18, 0x7d,
+	0x01, 0x8a, 0xd1, 0x5e, 0xc5, 0xef, 0xd8, 0xa4, 0x73, 0x64, 0xe3, 0x5f, 0x05, 0xb9, 0xf6, 0x06,
+	0x48, 0x1d, 0x7d, 0x09, 0xf8, 0x3d, 0x3b, 0x4e, 0x70, 0xa1, 0x03, 0x64, 0xff, 0xfe, 0x3a, 0x9e,
+	0x36, 0xae, 0x75, 0x00, 0x7e, 0xcb, 0x26, 0x3b, 0xd0, 0xbb, 0xba, 0x72, 0x90, 0xfd, 0x4f, 0xe3,
+	0x33, 0xd1, 0x66, 0x21, 0xba, 0x2c, 0x44, 0xde, 0x65, 0xa1, 0xf6, 0xec, 0xe2, 0x91, 0xf1, 0x7e,
+	0x1c, 0xa1, 0x41, 0x97, 0x6c, 0x07, 0x81, 0x34, 0x41, 0x4a, 0xe2, 0x64, 0x39, 0xff, 0x29, 0x89,
+	0x4f, 0x4e, 0xb5, 0xf8, 0xea, 0xe1, 0x79, 0x6d, 0x50, 0x14, 0x2f, 0x1e, 0x6d, 0x15, 0xad, 0x40,
+	0x6f, 0x64, 0x57, 0x60, 0x90, 0x95, 0x2b, 0xbd, 0x6e, 0x5f, 0x23, 0x0d, 0xca, 0xc1, 0x97, 0x6e,
+	0x0f, 0x13, 0x73, 0xf3, 0x11, 0x00, 0x00, 0xff, 0xff, 0x8d, 0xe5, 0x91, 0xae, 0x3e, 0x02, 0x00,
+	0x00,
+}
diff --git a/src/test_platform/result_flow/test_runner.proto b/src/test_platform/result_flow/test_runner.proto
new file mode 100644
index 0000000..c612f43
--- /dev/null
+++ b/src/test_platform/result_flow/test_runner.proto
@@ -0,0 +1,34 @@
+// Copyright 2020 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+syntax = "proto3";
+
+package test_platform.result_flow;
+
+option go_package = "go.chromium.org/chromiumos/infra/proto/go/test_platform/result_flow";
+
+import "test_platform/result_flow/common.proto";
+import "google/protobuf/timestamp.proto";
+
+// TestRunnerRequest defines the input of `result_flow test_runner`.
+message TestRunnerRequest {
+  // The source config for fetching the test runner builds.
+  Source test_runner = 1;
+  // The target to upload test run results.
+  Target test_run = 2;
+  // The target to upload test case results.
+  Target test_case = 3;
+  // Hard deadline for execution.
+  //
+  // TestRunner command should abort beyond this deadline.
+  google.protobuf.Timestamp deadline = 4;
+}
+
+// TestRunnerResponse defines the output of `result_flow test_runner`.
+message TestRunnerResponse {
+  // `result_flow test_runner` exits with exit code 0 unless there is an
+  // infrastructure failure. When the exit code is 0, `state` indicates the
+  // best known state of the test_runner command execution (see comments on State enum).
+  State state = 1;
+}
\ No newline at end of file