diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0180099c0ba..a9a4410708b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -30,7 +30,7 @@ env:
   BUILDTOOLS_VERSION: '3.0.0'
   BUILDIFIER_SHA256SUM: 'e92a6793c7134c5431c58fbc34700664f101e5c9b1c1fcd93b97978e8b7f88db'
   BUILDOZER_SHA256SUM: '3d58a0b6972e4535718cdd6c12778170ea7382de7c75bc3728f5719437ffb84d'
-  TENSORFLOW_VERSION: 'tf-nightly'
+  TENSORFLOW_VERSION: 'tf-nightly==2.19.0.dev20250206'
 
 jobs:
   build:
diff --git a/RELEASE.md b/RELEASE.md
index 460059d4bde..31ca6dc48cd 100644
--- a/RELEASE.md
+++ b/RELEASE.md
@@ -1,3 +1,10 @@
+# Release 2.19.0
+
+The 2.19 minor series tracks TensorFlow 2.19.
+
+This release contains only internal cleanups, with no particular new features or bug fixes.
+
+
 # Release 2.18.0
 
 The 2.18 minor series tracks TensorFlow 2.18.
diff --git a/tensorboard/compat/proto/config.proto b/tensorboard/compat/proto/config.proto
index dd953b685ff..f7c8ee837a5 100644
--- a/tensorboard/compat/proto/config.proto
+++ b/tensorboard/compat/proto/config.proto
@@ -2,6 +2,7 @@ syntax = "proto3";
 
 package tensorboard;
 
+import "tensorboard/compat/proto/coordination_config.proto";
 import "tensorboard/compat/proto/cost_graph.proto";
 import "tensorboard/compat/proto/graph.proto";
 import "tensorboard/compat/proto/step_stats.proto";
@@ -9,7 +10,6 @@ import "tensorboard/compat/proto/cluster.proto";
 import "tensorboard/compat/proto/debug.proto";
 import "tensorboard/compat/proto/rewriter_config.proto";
 import "tensorboard/compat/proto/rpc_options.proto";
-import "tensorboard/compat/proto/coordination_config.proto";
 
 option cc_enable_arenas = true;
 option java_outer_classname = "ConfigProtos";
@@ -77,6 +77,11 @@ message GPUOptions {
   //    name "/device:GPU:<id>") are also called "TF GPU id"s. Please
   //    refer to third_party/tensorflow/core/common_runtime/gpu/gpu_id.h
   //    for more information.
+  // 3. The visible_device_list is also used for PluggableDevice. And
+  //    different types of PluggableDevices share this field. In that case,
+  //    the pluggable_device_type is used to distinguish them, making the
+  //    visible_device_list a list of <pluggable_device_type>:<device_index>,
+  //    e.g. "PluggableDeviceA:0,PluggableDeviceA:1,PluggableDeviceB:0".
   string visible_device_list = 5;
 
   // In the event polling loop sleep this many microseconds between
@@ -306,7 +311,7 @@ message GPUOptions {
 
   // Everything inside experimental is subject to change and is not subject
   // to API stability guarantees in
-  // https://www.tensorflow.org/guide/version_compat.
+  // https://www.tensorflow.org/guide/versions.
   Experimental experimental = 9;
 }
 
@@ -578,7 +583,7 @@ message ConfigProto {
 
   // Everything inside Experimental is subject to change and is not subject
   // to API stability guarantees in
-  // https://www.tensorflow.org/guide/version_compat.
+  // https://www.tensorflow.org/guide/versions.
   message Experimental {
     // Task name for group resolution.
     string collective_group_leader = 1;
@@ -750,7 +755,7 @@ message ConfigProto {
     bool disable_functional_ops_lowering = 21;
 
     // Provides a hint to XLA auto clustering to prefer forming a single large
-    // cluster that encompases most of the graph.
+    // cluster that encompasses most of the graph.
     bool xla_prefer_single_graph_cluster = 22;
 
     // Distributed coordination service configurations.
@@ -983,3 +988,28 @@ message CallableOptions {
 
   // Next: 9
 }
+
+message BatchingOptions {
+  // Number of scheduling threads for processing batches of work. Determines
+  // the number of batches processed in parallel. This should be roughly in line
+  // with the number of TPU cores available.
+  int32 num_batch_threads = 1;
+
+  // The maximum allowed batch size. Can be larger than allowed_batch_sizes to
+  // utilize large batch splitting.
+  int32 max_batch_size = 2;
+
+  // Maximum number of microseconds to wait before outputting an incomplete
+  // batch.
+  int32 batch_timeout_micros = 3;
+
+  // Optional list of allowed batch sizes. If left empty, does nothing.
+  // Otherwise, supplies a list of batch sizes, causing the op to pad batches up
+  // to one of those sizes. The entries must increase monotonically, and the
+  // final entry must be equal or less than the max_batch_size.
+  repeated int32 allowed_batch_sizes = 4;
+
+  // Maximum number of batches enqueued for processing before requests are
+  // failed fast.
+  int32 max_enqueued_batches = 5;
+}
diff --git a/tensorboard/compat/proto/coordination_config.proto b/tensorboard/compat/proto/coordination_config.proto
index 850c938f20a..1be90561739 100644
--- a/tensorboard/compat/proto/coordination_config.proto
+++ b/tensorboard/compat/proto/coordination_config.proto
@@ -29,6 +29,10 @@ message CoordinationServiceConfig {
   // Maximum wait time for all members in the cluster to be registered.
   int64 cluster_register_timeout_in_ms = 4;
 
+  // Denotes if we should synchronize the agents' register attempts by blocking
+  // on a barrier. This is useful for synchronized restarts.
+  bool cluster_register_with_barrier = 14;
+
   // Heartbeat timeout, if a task does not record heartbeat in this time
   // window, it will be considered disconnected.
   // Note: This is also used as a grace period to accept any heartbeats after
diff --git a/tensorboard/compat/proto/proto_test.py b/tensorboard/compat/proto/proto_test.py
index f1cc8faaa71..a371e3a0e3f 100644
--- a/tensorboard/compat/proto/proto_test.py
+++ b/tensorboard/compat/proto/proto_test.py
@@ -155,7 +155,7 @@
     ("tensorflow/core/protobuf/", "tensorboard/compat/proto/"),
     ("tensorflow/core/util/", "tensorboard/compat/proto/"),
     ("tensorflow/python/framework/", "tensorboard/compat/proto/"),
-    ("tsl/protobuf", "tensorboard/compat/proto"),
+    ("xla/tsl/protobuf", "tensorboard/compat/proto"),
     ('package: "tensorflow.tfprof"', 'package: "tensorboard"'),
     ('package: "tensorflow"', 'package: "tensorboard"'),
     ('type_name: ".tensorflow.tfprof', 'type_name: ".tensorboard'),
@@ -236,7 +236,7 @@
     ```
     $ BUILDTOOLS_VERSION='3.0.0'
     $ BUILDIFIER_SHA256SUM='e92a6793c7134c5431c58fbc34700664f101e5c9b1c1fcd93b97978e8b7f88db'
-    $ ci/download_buildifier.sh "${BUILDTOOLS_VERSION}" "${BUILDIFIER_SHA256SUM}" ~/tb_buildifier/buildifier
+    $ ci/download_buildifier.sh "${{BUILDTOOLS_VERSION}}" "${{BUILDIFIER_SHA256SUM}}" ~/tb_buildifier/buildifier
     ```
 
     If a file needs reformatting, you'll see the file that needs to be
diff --git a/tensorboard/compat/proto/types.proto b/tensorboard/compat/proto/types.proto
index 5bcff0c1edf..c0e131bf14f 100644
--- a/tensorboard/compat/proto/types.proto
+++ b/tensorboard/compat/proto/types.proto
@@ -43,10 +43,13 @@ enum DataType {
   DT_FLOAT8_E5M2 = 24;    // 5 exponent bits, 2 mantissa bits.
   DT_FLOAT8_E4M3FN = 25;  // 4 exponent bits, 3 mantissa bits, finite-only, with
                           // 2 NaNs (0bS1111111).
-  // TODO - b/299182407: Leaving room for remaining float8 types.
-  // DT_FLOAT8_E4M3FNUZ = 26;
-  // DT_FLOAT8_E4M3B11FNUZ = 27;
-  // DT_FLOAT8_E5M2FNUZ = 28;
+  DT_FLOAT8_E4M3FNUZ = 26;     // 4 exponent bits, 3 mantissa bits, finite-only,
+                               // with NaN.
+  DT_FLOAT8_E4M3B11FNUZ = 27;  // 4 exponent bits, 3 mantissa bits, 11 bits
+                               // bias, finite-only, with NaNs.
+  DT_FLOAT8_E5M2FNUZ = 28;     // 5 exponent bits, 2 mantissa bits, finite-only,
+                               // with NaN.
+
   DT_INT4 = 29;
   DT_UINT4 = 30;
 
@@ -78,10 +81,10 @@ enum DataType {
   DT_UINT64_REF = 123;
   DT_FLOAT8_E5M2_REF = 124;
   DT_FLOAT8_E4M3FN_REF = 125;
-  // TODO - b/299182407: Leaving room for remaining float8 types.
-  // DT_FLOAT8_E4M3FNUZ_REF = 126;
-  // DT_FLOAT8_E4M3B11FNUZ_REF = 127;
-  // DT_FLOAT8_E5M2FNUZ_REF = 128;
+
+  DT_FLOAT8_E4M3FNUZ_REF = 126;
+  DT_FLOAT8_E4M3B11FNUZ_REF = 127;
+  DT_FLOAT8_E5M2FNUZ_REF = 128;
   DT_INT4_REF = 129;
   DT_UINT4_REF = 130;
 }
diff --git a/tensorboard/compat/proto/update.sh b/tensorboard/compat/proto/update.sh
index c87ae01dca7..9557eb0da6b 100755
--- a/tensorboard/compat/proto/update.sh
+++ b/tensorboard/compat/proto/update.sh
@@ -28,8 +28,8 @@ rsync --existing "$1"/tensorflow/core/util/*.proto tensorboard/compat/proto/
 rsync --existing "$1"/tensorflow/python/framework/*.proto tensorboard/compat/proto/
 # The "TSL" protos are now in their  own repo, but they are included as a
 # "vendored" package within TF. This dir contains protos that are imported with
-# the tsl/protobuf path that is replaced by the command below.
-rsync --existing "$1"/third_party/xla/third_party/tsl/tsl/protobuf/*.proto tensorboard/compat/proto/
+# the xla/tsl/protobuf path that is replaced by the command below.
+rsync --existing "$1"/third_party/xla/xla/tsl/protobuf/*.proto tensorboard/compat/proto/
 
 # Rewrite file paths and package names and disable LINT checks.
 #
@@ -40,7 +40,7 @@ find tensorboard/compat/proto/ -type f  -name '*.proto' -exec perl -pi \
   -e 's|tensorflow/core/profiler|tensorboard/compat/proto|g;' \
   -e 's|tensorflow/core/util|tensorboard/compat/proto|g;' \
   -e 's|tensorflow/python/framework|tensorboard/compat/proto|g;' \
-  -e 's|tsl/protobuf|tensorboard/compat/proto|g;' \
+  -e 's|xla/tsl/protobuf|tensorboard/compat/proto|g;' \
   -e 's|package tensorflow.tfprof;|package tensorboard;|g;' \
   -e 's|package tensorflow;|package tensorboard;|g;' \
   -e 's|tensorflow\.DataType|tensorboard.DataType|g;' \
diff --git a/tensorboard/data/server/descriptor.bin b/tensorboard/data/server/descriptor.bin
index 49ffe72edf9..681c537d34f 100644
Binary files a/tensorboard/data/server/descriptor.bin and b/tensorboard/data/server/descriptor.bin differ
diff --git a/tensorboard/data/server/tensorboard.pb.rs b/tensorboard/data/server/tensorboard.pb.rs
index 462ec3e7d6b..0505bec9b5c 100644
--- a/tensorboard/data/server/tensorboard.pb.rs
+++ b/tensorboard/data/server/tensorboard.pb.rs
@@ -131,10 +131,19 @@ pub enum DataType {
     /// 4 exponent bits, 3 mantissa bits, finite-only, with
     DtFloat8E4m3fn = 25,
     /// 2 NaNs (0bS1111111).
-    /// TODO - b/299182407: Leaving room for remaining float8 types.
-    /// DT_FLOAT8_E4M3FNUZ = 26;
-    /// DT_FLOAT8_E4M3B11FNUZ = 27;
-    /// DT_FLOAT8_E5M2FNUZ = 28;
+    ///
+    /// 4 exponent bits, 3 mantissa bits, finite-only,
+    DtFloat8E4m3fnuz = 26,
+    /// with NaN.
+    ///
+    /// 4 exponent bits, 3 mantissa bits, 11 bits
+    DtFloat8E4m3b11fnuz = 27,
+    /// bias, finite-only, with NaNs.
+    ///
+    /// 5 exponent bits, 2 mantissa bits, finite-only,
+    DtFloat8E5m2fnuz = 28,
+    // with NaN.
+
     DtInt4 = 29,
     DtUint4 = 30,
     /// Do not use!  These are only for TF1's obsolete reference Variables.
@@ -165,10 +174,9 @@ pub enum DataType {
     DtUint64Ref = 123,
     DtFloat8E5m2Ref = 124,
     DtFloat8E4m3fnRef = 125,
-    /// TODO - b/299182407: Leaving room for remaining float8 types.
-    /// DT_FLOAT8_E4M3FNUZ_REF = 126;
-    /// DT_FLOAT8_E4M3B11FNUZ_REF = 127;
-    /// DT_FLOAT8_E5M2FNUZ_REF = 128;
+    DtFloat8E4m3fnuzRef = 126,
+    DtFloat8E4m3b11fnuzRef = 127,
+    DtFloat8E5m2fnuzRef = 128,
     DtInt4Ref = 129,
     DtUint4Ref = 130,
 }
diff --git a/tensorboard/version.py b/tensorboard/version.py
index 4bea1ff7aa2..ae6a803824c 100644
--- a/tensorboard/version.py
+++ b/tensorboard/version.py
@@ -15,7 +15,7 @@
 
 """Contains the version string."""
 
-VERSION = "2.19.0a0"
+VERSION = "2.19.0"
 
 if __name__ == "__main__":
     print(VERSION)