diff --git a/mediapipe/framework/BUILD b/mediapipe/framework/BUILD
index a7d9e0a63..86608285b 100644
--- a/mediapipe/framework/BUILD
+++ b/mediapipe/framework/BUILD
@@ -1355,6 +1355,22 @@ cc_test(
     ],
 )
 
+cc_test(
+    name = "calculator_graph_summary_packet_test",
+    srcs = ["calculator_graph_summary_packet_test.cc"],
+    deps = [
+        ":calculator_framework",
+        ":packet",
+        "//mediapipe/framework/api2:node",
+        "//mediapipe/framework/api2:packet",
+        "//mediapipe/framework/api2:port",
+        "//mediapipe/framework/port:gtest_main",
+        "//mediapipe/framework/port:parse_text_proto",
+        "//mediapipe/framework/stream_handler:immediate_input_stream_handler",
+        "//mediapipe/framework/tool:sink",
+    ],
+)
+
 cc_test(
     name = "calculator_runner_test",
     size = "medium",
diff --git a/mediapipe/framework/calculator_graph_summary_packet_test.cc b/mediapipe/framework/calculator_graph_summary_packet_test.cc
new file mode 100644
index 000000000..c8d1e7eb7
--- /dev/null
+++ b/mediapipe/framework/calculator_graph_summary_packet_test.cc
@@ -0,0 +1,327 @@
+#include "mediapipe/framework/api2/node.h"
+#include "mediapipe/framework/api2/packet.h"
+#include "mediapipe/framework/api2/port.h"
+#include "mediapipe/framework/calculator_framework.h"
+#include "mediapipe/framework/packet.h"
+#include "mediapipe/framework/port/gmock.h"
+#include "mediapipe/framework/port/gtest.h"
+#include "mediapipe/framework/port/parse_text_proto.h"
+#include "mediapipe/framework/port/status_matchers.h"
+
+namespace mediapipe {
+
+using ::mediapipe::api2::Input;
+using ::mediapipe::api2::Node;
+using ::mediapipe::api2::Output;
+using ::testing::ElementsAre;
+using ::testing::Eq;
+using ::testing::IsEmpty;
+using ::testing::Value;
+
+namespace {
+
+MATCHER_P2(IntPacket, value, timestamp, "") {
+  *result_listener << "where object is (value: " << arg.template Get<int>()
+                   << ", timestamp: " << arg.Timestamp() << ")";
+  return Value(arg.template Get<int>(), Eq(value)) &&
+         Value(arg.Timestamp(), Eq(timestamp));
+}
+
+// Calculates and produces sum of all passed inputs when no more packets can be
+// expected on the input stream.
+class SummaryPacketCalculator : public Node {
+ public:
+  static constexpr Input<int> kIn{"IN"};
+  static constexpr Output<int> kOut{"SUMMARY"};
+
+  MEDIAPIPE_NODE_CONTRACT(kIn, kOut);
+
+  static absl::Status UpdateContract(CalculatorContract* cc) {
+    // Makes sure there are no automatic timestamp bound updates when Process
+    // is called.
+    cc->SetTimestampOffset(TimestampDiff::Unset());
+    // Currently, only ImmediateInputStreamHandler supports "done" timestamp
+    // bound update. (ImmediateInputStreamhandler handles multiple input
+    // streams differently, so, in that case, calculator adjustments may be
+    // required.)
+    // TODO: update all input stream handlers to support "done"
+    // timestamp bound update.
+    cc->SetInputStreamHandler("ImmediateInputStreamHandler");
+    // Enables processing timestamp bound updates. For this use case we are
+    // specifically interested in "done" timestamp bound update. (E.g. when
+    // all input packet sources are closed.)
+    cc->SetProcessTimestampBounds(true);
+    return absl::OkStatus();
+  }
+
+  absl::Status Process(CalculatorContext* cc) final {
+    if (!kIn(cc).IsEmpty()) {
+      value_ += kIn(cc).Get();
+    }
+
+    if (kOut(cc).IsClosed()) {
+      // This can happen:
+      // 1. If, during previous invocation, kIn(cc).IsDone() == true (e.g.
+      //    source calculator finished generating packets sent to kIn) and
+      //    HasNextAllowedInStream() == true (which is an often case).
+      // 2. For Timestamp::PreStream, ImmediateInputStreamHandler will still
+      //    invoke Process() with Timestamp::Max to indicate "Done" timestamp
+      //    bound update.
+      return absl::OkStatus();
+    }
+
+    // TODO: input stream holding a packet with timestamp that has
+    // no next timestamp allowed in stream should always result in
+    // InputStream::IsDone() == true.
+    if (kIn(cc).IsDone() || !cc->InputTimestamp().HasNextAllowedInStream()) {
+      // kOut(cc).Send(value_) can be used here as well, however in the case of
+      // source calculator sending inputs into kIn the resulting timestamp is
+      // not well defined (e.g. it can be the last packet timestamp or
+      // Timestamp::Max())
+      // TODO: last packet from source should always result in
+      // InputStream::IsDone() == true.
+      kOut(cc).Send(value_, Timestamp::Max());
+      kOut(cc).Close();
+    }
+    return absl::OkStatus();
+  }
+
+ private:
+  int value_ = 0;
+};
+MEDIAPIPE_REGISTER_NODE(SummaryPacketCalculator);
+
+TEST(SummaryPacketCalculatorUseCaseTest,
+     ProducesSummaryPacketOnClosingAllPacketSources) {
+  auto graph_config = ParseTextProtoOrDie<CalculatorGraphConfig>(R"pb(
+    input_stream: 'input'
+    node {
+      calculator: "SummaryPacketCalculator"
+      input_stream: 'IN:input'
+      output_stream: 'SUMMARY:output'
+    }
+  )pb");
+  std::vector<Packet> output_packets;
+  tool::AddVectorSink("output", &graph_config, &output_packets);
+
+  CalculatorGraph graph;
+  MP_ASSERT_OK(graph.Initialize(graph_config, {}));
+  MP_ASSERT_OK(graph.StartRun({}));
+  MP_ASSERT_OK(graph.WaitUntilIdle());
+  EXPECT_THAT(output_packets, IsEmpty());
+
+  auto send_packet = [&graph](int value, Timestamp timestamp) {
+    MP_ASSERT_OK(graph.AddPacketToInputStream(
+        "input", MakePacket<int>(value).At(timestamp)));
+  };
+
+  send_packet(10, Timestamp(10));
+  MP_ASSERT_OK(graph.WaitUntilIdle());
+  EXPECT_THAT(output_packets, IsEmpty());
+
+  send_packet(20, Timestamp(11));
+  MP_ASSERT_OK(graph.WaitUntilIdle());
+  EXPECT_THAT(output_packets, IsEmpty());
+
+  MP_ASSERT_OK(graph.CloseAllPacketSources());
+  MP_ASSERT_OK(graph.WaitUntilDone());
+  EXPECT_THAT(output_packets, ElementsAre(IntPacket(30, Timestamp::Max())));
+}
+
+TEST(SummaryPacketCalculatorUseCaseTest, ProducesSummaryPacketOnMaxTimestamp) {
+  auto graph_config = ParseTextProtoOrDie<CalculatorGraphConfig>(R"pb(
+    input_stream: 'input'
+    node {
+      calculator: "SummaryPacketCalculator"
+      input_stream: 'IN:input'
+      output_stream: 'SUMMARY:output'
+    }
+  )pb");
+  std::vector<Packet> output_packets;
+  tool::AddVectorSink("output", &graph_config, &output_packets);
+
+  CalculatorGraph graph;
+  MP_ASSERT_OK(graph.Initialize(graph_config, {}));
+  MP_ASSERT_OK(graph.StartRun({}));
+  MP_ASSERT_OK(graph.WaitUntilIdle());
+  EXPECT_THAT(output_packets, IsEmpty());
+
+  auto send_packet = [&graph](int value, Timestamp timestamp) {
+    MP_ASSERT_OK(graph.AddPacketToInputStream(
+        "input", MakePacket<int>(value).At(timestamp)));
+  };
+
+  send_packet(10, Timestamp(10));
+  MP_ASSERT_OK(graph.WaitUntilIdle());
+  EXPECT_THAT(output_packets, IsEmpty());
+
+  send_packet(20, Timestamp::Max());
+  MP_ASSERT_OK(graph.WaitUntilIdle());
+  EXPECT_THAT(output_packets, ElementsAre(IntPacket(30, Timestamp::Max())));
+
+  output_packets.clear();
+  MP_ASSERT_OK(graph.CloseAllPacketSources());
+  MP_ASSERT_OK(graph.WaitUntilDone());
+  EXPECT_THAT(output_packets, IsEmpty());
+}
+
+TEST(SummaryPacketCalculatorUseCaseTest,
+     ProducesSummaryPacketOnPreStreamTimestamp) {
+  auto graph_config = ParseTextProtoOrDie<CalculatorGraphConfig>(R"pb(
+    input_stream: 'input'
+    node {
+      calculator: "SummaryPacketCalculator"
+      input_stream: 'IN:input'
+      output_stream: 'SUMMARY:output'
+    }
+  )pb");
+  std::vector<Packet> output_packets;
+  tool::AddVectorSink("output", &graph_config, &output_packets);
+
+  CalculatorGraph graph;
+  MP_ASSERT_OK(graph.Initialize(graph_config, {}));
+  MP_ASSERT_OK(graph.StartRun({}));
+  MP_ASSERT_OK(graph.WaitUntilIdle());
+  EXPECT_THAT(output_packets, IsEmpty());
+
+  auto send_packet = [&graph](int value, Timestamp timestamp) {
+    MP_ASSERT_OK(graph.AddPacketToInputStream(
+        "input", MakePacket<int>(value).At(timestamp)));
+  };
+
+  send_packet(10, Timestamp::PreStream());
+  MP_ASSERT_OK(graph.WaitUntilIdle());
+  EXPECT_THAT(output_packets, ElementsAre(IntPacket(10, Timestamp::Max())));
+
+  output_packets.clear();
+  MP_ASSERT_OK(graph.CloseAllPacketSources());
+  MP_ASSERT_OK(graph.WaitUntilDone());
+  EXPECT_THAT(output_packets, IsEmpty());
+}
+
+TEST(SummaryPacketCalculatorUseCaseTest,
+     ProducesSummaryPacketOnPostStreamTimestamp) {
+  std::vector<Packet> output_packets;
+  CalculatorGraphConfig graph_config =
+      ParseTextProtoOrDie<CalculatorGraphConfig>(R"pb(
+        input_stream: 'input'
+        node {
+          calculator: "SummaryPacketCalculator"
+          input_stream: 'IN:input'
+          output_stream: 'SUMMARY:output'
+        }
+      )pb");
+  tool::AddVectorSink("output", &graph_config, &output_packets);
+
+  CalculatorGraph graph;
+  MP_ASSERT_OK(graph.Initialize(graph_config, {}));
+  MP_ASSERT_OK(graph.StartRun({}));
+  MP_ASSERT_OK(graph.WaitUntilIdle());
+  EXPECT_THAT(output_packets, IsEmpty());
+
+  auto send_packet = [&graph](int value, Timestamp timestamp) {
+    MP_ASSERT_OK(graph.AddPacketToInputStream(
+        "input", MakePacket<int>(value).At(timestamp)));
+  };
+
+  send_packet(10, Timestamp::PostStream());
+  MP_ASSERT_OK(graph.WaitUntilIdle());
+  EXPECT_THAT(output_packets, ElementsAre(IntPacket(10, Timestamp::Max())));
+
+  output_packets.clear();
+  MP_ASSERT_OK(graph.CloseAllPacketSources());
+  MP_ASSERT_OK(graph.WaitUntilDone());
+  EXPECT_THAT(output_packets, IsEmpty());
+}
+
+class IntGeneratorCalculator : public Node {
+ public:
+  static constexpr Output<int> kOut{"INT"};
+
+  MEDIAPIPE_NODE_CONTRACT(kOut);
+
+  absl::Status Process(CalculatorContext* cc) final {
+    kOut(cc).Send(20, Timestamp(0));
+    kOut(cc).Send(10, Timestamp(1000));
+    return tool::StatusStop();
+  }
+};
+MEDIAPIPE_REGISTER_NODE(IntGeneratorCalculator);
+
+TEST(SummaryPacketCalculatorUseCaseTest,
+     ProducesSummaryPacketOnSourceCalculatorCompletion) {
+  std::vector<Packet> output_packets;
+  CalculatorGraphConfig graph_config =
+      ParseTextProtoOrDie<CalculatorGraphConfig>(R"pb(
+        node {
+          calculator: "IntGeneratorCalculator"
+          output_stream: "INT:int_value"
+        }
+        node {
+          calculator: "SummaryPacketCalculator"
+          input_stream: "IN:int_value"
+          output_stream: "SUMMARY:output"
+        }
+      )pb");
+  tool::AddVectorSink("output", &graph_config, &output_packets);
+
+  CalculatorGraph graph;
+  MP_ASSERT_OK(graph.Initialize(graph_config, {}));
+  MP_ASSERT_OK(graph.StartRun({}));
+  MP_EXPECT_OK(graph.WaitUntilDone());
+  EXPECT_THAT(output_packets, ElementsAre(IntPacket(30, Timestamp::Max())));
+}
+
+class EmitOnCloseCalculator : public Node {
+ public:
+  static constexpr Input<int> kIn{"IN"};
+  static constexpr Output<int> kOut{"INT"};
+
+  MEDIAPIPE_NODE_CONTRACT(kIn, kOut);
+
+  absl::Status Process(CalculatorContext* cc) final { return absl::OkStatus(); }
+
+  absl::Status Close(CalculatorContext* cc) final {
+    kOut(cc).Send(20, Timestamp(0));
+    kOut(cc).Send(10, Timestamp(1000));
+    return absl::OkStatus();
+  }
+};
+MEDIAPIPE_REGISTER_NODE(EmitOnCloseCalculator);
+
+TEST(SummaryPacketCalculatorUseCaseTest,
+     ProducesSummaryPacketOnAnotherCalculatorClosure) {
+  auto graph_config = ParseTextProtoOrDie<CalculatorGraphConfig>(R"pb(
+    input_stream: "input"
+    node {
+      calculator: "EmitOnCloseCalculator"
+      input_stream: "IN:input"
+      output_stream: "INT:int_value"
+    }
+    node {
+      calculator: "SummaryPacketCalculator"
+      input_stream: "IN:int_value"
+      output_stream: "SUMMARY:output"
+    }
+  )pb");
+  std::vector<Packet> output_packets;
+  tool::AddVectorSink("output", &graph_config, &output_packets);
+
+  CalculatorGraph graph;
+  MP_ASSERT_OK(graph.Initialize(graph_config, {}));
+  MP_ASSERT_OK(graph.StartRun({}));
+  MP_ASSERT_OK(graph.WaitUntilIdle());
+  EXPECT_THAT(output_packets, IsEmpty());
+
+  MP_ASSERT_OK(graph.CloseInputStream("input"));
+  MP_ASSERT_OK(graph.WaitUntilIdle());
+  EXPECT_THAT(output_packets, ElementsAre(IntPacket(30, Timestamp::Max())));
+
+  output_packets.clear();
+  MP_ASSERT_OK(graph.CloseAllPacketSources());
+  MP_ASSERT_OK(graph.WaitUntilDone());
+  EXPECT_THAT(output_packets, IsEmpty());
+}
+
+}  // namespace
+}  // namespace mediapipe
diff --git a/mediapipe/framework/timestamp.cc b/mediapipe/framework/timestamp.cc
index 05b69747f..4ece74c99 100644
--- a/mediapipe/framework/timestamp.cc
+++ b/mediapipe/framework/timestamp.cc
@@ -131,6 +131,13 @@ Timestamp Timestamp::NextAllowedInStream() const {
   return *this + 1;
 }
 
+bool Timestamp::HasNextAllowedInStream() const {
+  if (*this >= Max() || *this == PreStream()) {
+    return false;
+  }
+  return true;
+}
+
 Timestamp Timestamp::PreviousAllowedInStream() const {
   if (*this <= Min() || *this == PostStream()) {
     // Indicates that no previous timestamps may occur.
diff --git a/mediapipe/framework/timestamp.h b/mediapipe/framework/timestamp.h
index 966ec1839..d125d28bb 100644
--- a/mediapipe/framework/timestamp.h
+++ b/mediapipe/framework/timestamp.h
@@ -186,6 +186,10 @@ class Timestamp {
   // CHECKs that this->IsAllowedInStream().
   Timestamp NextAllowedInStream() const;
 
+  // Returns true if there's a next timestamp in the range [Min .. Max] after
+  // this one.
+  bool HasNextAllowedInStream() const;
+
   // Returns the previous timestamp in the range [Min .. Max], or
   // Unstarted() if no Packets may preceed one with this timestamp.
   Timestamp PreviousAllowedInStream() const;
diff --git a/mediapipe/framework/timestamp_test.cc b/mediapipe/framework/timestamp_test.cc
index 5f5cc3428..3ba0b5c36 100644
--- a/mediapipe/framework/timestamp_test.cc
+++ b/mediapipe/framework/timestamp_test.cc
@@ -125,6 +125,22 @@ TEST(TimestampTest, NextAllowedInStream) {
             Timestamp::PostStream().NextAllowedInStream());
 }
 
+TEST(TimestampTest, HasNextAllowedInStream) {
+  EXPECT_TRUE(Timestamp::Min().HasNextAllowedInStream());
+  EXPECT_TRUE((Timestamp::Min() + 1).HasNextAllowedInStream());
+  EXPECT_TRUE(Timestamp(-1000).HasNextAllowedInStream());
+  EXPECT_TRUE(Timestamp(0).HasNextAllowedInStream());
+  EXPECT_TRUE(Timestamp(1000).HasNextAllowedInStream());
+  EXPECT_TRUE((Timestamp::Max() - 2).HasNextAllowedInStream());
+  EXPECT_TRUE((Timestamp::Max() - 1).HasNextAllowedInStream());
+
+  EXPECT_FALSE(Timestamp::PreStream().HasNextAllowedInStream());
+  EXPECT_FALSE(Timestamp::Max().HasNextAllowedInStream());
+  EXPECT_FALSE(Timestamp::PostStream().HasNextAllowedInStream());
+  EXPECT_FALSE(Timestamp::OneOverPostStream().HasNextAllowedInStream());
+  EXPECT_FALSE(Timestamp::Done().HasNextAllowedInStream());
+}
+
 TEST(TimestampTest, SpecialValueDifferences) {
   {  // Lower range
     const std::vector<Timestamp> timestamps = {