From 2c01577eac7836fec695b93886daefb745f3fd4b Mon Sep 17 00:00:00 2001
From: Gil Forsyth <gforsyth@nvidia.com>
Date: Fri, 18 Jul 2025 11:54:05 -0400
Subject: [PATCH 01/11] chore: bump to 0.46

---
 .github/workflows/build.yaml                         |  8 ++++----
 .github/workflows/pr.yaml                            | 12 ++++++------
 .github/workflows/test.yaml                          |  4 ++--
 .github/workflows/trigger-breaking-change-alert.yaml |  2 +-
 RAPIDS_VERSION                                       |  2 +-
 VERSION                                              |  2 +-
 dependencies.yaml                                    |  8 ++++----
 pyproject.toml                                       |  4 ++--
 8 files changed, 21 insertions(+), 21 deletions(-)

diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 521a6805..502f5d3f 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -34,7 +34,7 @@ concurrency:
 jobs:
   conda-python-build:
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/conda-python-build.yaml@branch-25.08
+    uses: rapidsai/shared-workflows/.github/workflows/conda-python-build.yaml@branch-25.10
     with:
       build_type: ${{ inputs.build_type || 'branch' }}
       branch: ${{ inputs.branch }}
@@ -44,7 +44,7 @@ jobs:
   upload-conda:
     needs: [conda-python-build]
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/conda-upload-packages.yaml@branch-25.08
+    uses: rapidsai/shared-workflows/.github/workflows/conda-upload-packages.yaml@branch-25.10
     with:
       build_type: ${{ inputs.build_type || 'branch' }}
       branch: ${{ inputs.branch }}
@@ -52,7 +52,7 @@ jobs:
       sha: ${{ inputs.sha }}
   wheel-build:
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-build.yaml@branch-25.08
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-build.yaml@branch-25.10
     with:
       build_type: ${{ inputs.build_type || 'branch' }}
       branch: ${{ inputs.branch }}
@@ -64,7 +64,7 @@ jobs:
   wheel-publish:
     needs: wheel-build
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-publish.yaml@branch-25.08
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-publish.yaml@branch-25.10
     with:
       build_type: ${{ inputs.build_type || 'branch' }}
       branch: ${{ inputs.branch }}
diff --git a/.github/workflows/pr.yaml b/.github/workflows/pr.yaml
index eb7d287c..e53ea62f 100644
--- a/.github/workflows/pr.yaml
+++ b/.github/workflows/pr.yaml
@@ -19,7 +19,7 @@ jobs:
       - wheel-tests
       - telemetry-setup
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/pr-builder.yaml@branch-25.08
+    uses: rapidsai/shared-workflows/.github/workflows/pr-builder.yaml@branch-25.10
     with:
       needs: ${{ toJSON(needs) }}
   telemetry-setup:
@@ -36,20 +36,20 @@ jobs:
   checks:
     secrets: inherit
     needs: telemetry-setup
-    uses: rapidsai/shared-workflows/.github/workflows/checks.yaml@branch-25.08
+    uses: rapidsai/shared-workflows/.github/workflows/checks.yaml@branch-25.10
     with:
       ignored_pr_jobs: telemetry-summarize
   conda-python-build:
     needs: checks
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/conda-python-build.yaml@branch-25.08
+    uses: rapidsai/shared-workflows/.github/workflows/conda-python-build.yaml@branch-25.10
     with:
       build_type: pull-request
       script: ci/build_python.sh
   conda-python-tests:
     needs: conda-python-build
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/conda-python-tests.yaml@branch-25.08
+    uses: rapidsai/shared-workflows/.github/workflows/conda-python-tests.yaml@branch-25.10
     with:
       build_type: pull-request
       container-options: "--cap-add CAP_SYS_PTRACE --shm-size=8g --ulimit=nofile=1000000:1000000"
@@ -57,7 +57,7 @@ jobs:
   wheel-build:
     needs: checks
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-build.yaml@branch-25.08
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-build.yaml@branch-25.10
     with:
       build_type: pull-request
       script: ci/build_wheel.sh
@@ -66,7 +66,7 @@ jobs:
   wheel-tests:
     needs: wheel-build
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-test.yaml@branch-25.08
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-test.yaml@branch-25.10
     with:
       build_type: pull-request
       script: ci/test_wheel.sh
diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 5098c9d9..4403315b 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -25,7 +25,7 @@ on:
 jobs:
   conda-python-tests:
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/conda-python-tests.yaml@branch-25.08
+    uses: rapidsai/shared-workflows/.github/workflows/conda-python-tests.yaml@branch-25.10
     with:
       build_type: ${{ inputs.build_type }}
       branch: ${{ inputs.branch }}
@@ -35,7 +35,7 @@ jobs:
       container-options: "--cap-add CAP_SYS_PTRACE --shm-size=8g --ulimit=nofile=1000000:1000000"
   wheel-tests:
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-test.yaml@branch-25.08
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-test.yaml@branch-25.10
     with:
       build_type: ${{ inputs.build_type }}
       branch: ${{ inputs.branch }}
diff --git a/.github/workflows/trigger-breaking-change-alert.yaml b/.github/workflows/trigger-breaking-change-alert.yaml
index 593fcb10..48bf37af 100644
--- a/.github/workflows/trigger-breaking-change-alert.yaml
+++ b/.github/workflows/trigger-breaking-change-alert.yaml
@@ -12,7 +12,7 @@ jobs:
   trigger-notifier:
     if: contains(github.event.pull_request.labels.*.name, 'breaking')
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/breaking-change-alert.yaml@branch-25.08
+    uses: rapidsai/shared-workflows/.github/workflows/breaking-change-alert.yaml@branch-25.10
     with:
       sender_login: ${{ github.event.sender.login }}
       sender_avatar: ${{ github.event.sender.avatar_url }}
diff --git a/RAPIDS_VERSION b/RAPIDS_VERSION
index 3af4bda0..296e3528 100644
--- a/RAPIDS_VERSION
+++ b/RAPIDS_VERSION
@@ -1 +1 @@
-25.08.00
+25.10.00
diff --git a/VERSION b/VERSION
index bcce5d06..30109231 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.45.0
+0.46.0
diff --git a/dependencies.yaml b/dependencies.yaml
index f7ee497a..8fb0eaa7 100644
--- a/dependencies.yaml
+++ b/dependencies.yaml
@@ -203,13 +203,13 @@ dependencies:
     common:
       - output_types: conda
         packages:
-          - ucx-py==0.45.*,>=0.0.0a0
+          - ucx-py==0.46.*,>=0.0.0a0
   test_python:
     common:
       - output_types: [conda, requirements, pyproject]
         packages:
           - cloudpickle
-          - rapids-dask-dependency==25.8.*,>=0.0.0a0
+          - rapids-dask-dependency==25.10.*,>=0.0.0a0
           - distributed
           - numba>=0.59.1,<0.62.0a0
           - pytest==7.*
@@ -217,7 +217,7 @@ dependencies:
           - pytest-rerunfailures
       - output_types: [conda]
         packages:
-          - &cudf_unsuffixed cudf==25.8.*,>=0.0.0a0
+          - &cudf_unsuffixed cudf==25.10.*,>=0.0.0a0
     specific:
       - output_types: [requirements, pyproject]
         matrices:
@@ -225,7 +225,7 @@ dependencies:
               cuda: "12.*"
               cuda_suffixed: "true"
             packages:
-              - cudf-cu12==25.8.*,>=0.0.0a0
+              - cudf-cu12==25.10.*,>=0.0.0a0
           - matrix:
             packages:
               - *cudf_unsuffixed
diff --git a/pyproject.toml b/pyproject.toml
index 15d421ea..b4aeec5e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -48,14 +48,14 @@ classifiers = [
 [project.optional-dependencies]
 test = [
     "cloudpickle",
-    "cudf==25.8.*,>=0.0.0a0",
+    "cudf==25.10.*,>=0.0.0a0",
     "cupy-cuda12x>=12.0.0",
     "distributed",
     "numba>=0.59.1,<0.62.0a0",
     "pytest-asyncio",
     "pytest-rerunfailures",
     "pytest==7.*",
-    "rapids-dask-dependency==25.8.*,>=0.0.0a0",
+    "rapids-dask-dependency==25.10.*,>=0.0.0a0",
 ] # This list was generated by `rapids-dependency-file-generator`. To make changes, edit dependencies.yaml and run `rapids-dependency-file-generator`.
 
 [project.urls]

From 4ac075e0e4e44392b636b521bb522d9ec1e0d5bd Mon Sep 17 00:00:00 2001
From: Vyas Ramasubramani <vyasr@nvidia.com>
Date: Fri, 25 Jul 2025 08:53:06 -0700
Subject: [PATCH 02/11] Use GCC 14 (#1147)

---
 conda/recipes/ucx-py/conda_build_config.yaml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/conda/recipes/ucx-py/conda_build_config.yaml b/conda/recipes/ucx-py/conda_build_config.yaml
index f643760f..360b3fb0 100644
--- a/conda/recipes/ucx-py/conda_build_config.yaml
+++ b/conda/recipes/ucx-py/conda_build_config.yaml
@@ -1,8 +1,8 @@
 c_compiler_version:
-  - 13
+  - 14
 
 cxx_compiler_version:
-  - 13
+  - 14
 
 ucx:
   - "==1.15.*"

From 2731d97e106f43c6071a239dfc7a7324ba98d6ea Mon Sep 17 00:00:00 2001
From: Kyle Edwards <kyedwards@nvidia.com>
Date: Tue, 5 Aug 2025 14:36:17 -0400
Subject: [PATCH 03/11] Update rapids-build-backend to 0.4.1 (#1159)

Issue: https://github.com/rapidsai/build-planning/issues/207

Authors:
  - Kyle Edwards (https://github.com/KyleFromNVIDIA)

Approvers:
  - Bradley Dice (https://github.com/bdice)
  - James Lamb (https://github.com/jameslamb)

URL: https://github.com/rapidsai/ucx-py/pull/1159
---
 conda/recipes/ucx-py/recipe.yaml | 2 +-
 dependencies.yaml                | 2 +-
 pyproject.toml                   | 4 ++--
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/conda/recipes/ucx-py/recipe.yaml b/conda/recipes/ucx-py/recipe.yaml
index 0fa58c6c..1e37fd13 100644
--- a/conda/recipes/ucx-py/recipe.yaml
+++ b/conda/recipes/ucx-py/recipe.yaml
@@ -30,7 +30,7 @@ requirements:
     - cython>=3.0.0
     - pip
     - python =${{ py_version }}
-    - rapids-build-backend>=0.3.1,<0.4.0dev0
+    - rapids-build-backend>=0.4.0,<0.5.0.dev0
     - setuptools>=64.0.0
     - ucx
   run:
diff --git a/dependencies.yaml b/dependencies.yaml
index 8fb0eaa7..3e24a466 100644
--- a/dependencies.yaml
+++ b/dependencies.yaml
@@ -131,7 +131,7 @@ dependencies:
     common:
       - output_types: [conda, requirements, pyproject]
         packages:
-          - rapids-build-backend>=0.3.1,<0.4.0dev0
+          - rapids-build-backend>=0.4.0,<0.5.0.dev0
           - setuptools>=64.0.0
   run:
     common:
diff --git a/pyproject.toml b/pyproject.toml
index b4aeec5e..3188b7db 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,7 +15,7 @@
 [build-system]
 build-backend = "rapids_build_backend.build"
 requires = [
-    "rapids-build-backend>=0.3.1,<0.4.0dev0",
+    "rapids-build-backend>=0.4.0,<0.5.0.dev0",
     "setuptools>=64.0.0",
 ] # This list was generated by `rapids-dependency-file-generator`. To make changes, edit dependencies.yaml and run `rapids-dependency-file-generator`.
 
@@ -114,7 +114,7 @@ addopts = "--tb=native"
 [tool.rapids-build-backend]
 build-backend = "setuptools.build_meta"
 commit-files = [
-    "ucp/COMMIT_FILE"
+    "ucp/GIT_COMMIT"
 ]
 # by default, do not rename the package 'ucx-py-cu${ver}'
 # (this is overridden in wheel publishing)

From bb72a1d97c962878b1a2e82dd62e6bceae706931 Mon Sep 17 00:00:00 2001
From: Peter Andreas Entschev <peter@entschev.com>
Date: Tue, 12 Aug 2025 19:14:37 +0200
Subject: [PATCH 04/11] Increase min and max UCX pins to >=1.17 and <1.20,
 respectively (#1161)

UCX 1.19 was released last week and we need to support it. Furthermore, we can tighten pins a little and just keep supporting up to a maximum of 3 minor versions, thus increasing to minimum pin 1.17 as well.

Authors:
  - Peter Andreas Entschev (https://github.com/pentschev)

Approvers:
  - Bradley Dice (https://github.com/bdice)
  - Benjamin Zaitlen (https://github.com/quasiben)

URL: https://github.com/rapidsai/ucx-py/pull/1161
---
 conda/recipes/ucx-py/conda_build_config.yaml |  2 +-
 conda/recipes/ucx-py/recipe.yaml             |  2 +-
 dependencies.yaml                            | 10 +++++-----
 docs/source/install.rst                      | 10 +++++-----
 ucp/__init__.py                              |  2 +-
 5 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/conda/recipes/ucx-py/conda_build_config.yaml b/conda/recipes/ucx-py/conda_build_config.yaml
index 360b3fb0..5dea1a47 100644
--- a/conda/recipes/ucx-py/conda_build_config.yaml
+++ b/conda/recipes/ucx-py/conda_build_config.yaml
@@ -5,4 +5,4 @@ cxx_compiler_version:
   - 14
 
 ucx:
-  - "==1.15.*"
+  - "==1.17.*"
diff --git a/conda/recipes/ucx-py/recipe.yaml b/conda/recipes/ucx-py/recipe.yaml
index 1e37fd13..a0726bc3 100644
--- a/conda/recipes/ucx-py/recipe.yaml
+++ b/conda/recipes/ucx-py/recipe.yaml
@@ -37,7 +37,7 @@ requirements:
     - numpy>=1.23,<3.0a0
     - pynvml>=12.0.0,<13.0.0a0
     - python
-    - ucx >=1.15.0,<1.19.0
+    - ucx >=1.17.0,<1.20.0
   ignore_run_exports:
     from_package:
       - ${{ compiler("c") }}
diff --git a/dependencies.yaml b/dependencies.yaml
index 3e24a466..b9d83e7b 100644
--- a/dependencies.yaml
+++ b/dependencies.yaml
@@ -157,7 +157,7 @@ dependencies:
     common:
       - output_types: conda
         packages:
-          - ucx==1.15.0
+          - ucx==1.17.0
       - output_types: requirements
         packages:
           # pip recognizes the index as a global option for the requirements.txt file
@@ -165,14 +165,14 @@ dependencies:
           - --extra-index-url=https://pypi.anaconda.org/rapidsai-wheels-nightly/simple
     specific:
       # very tight >=x.x.x,<x.x.(x+1) here allows for installation of
-      # post release like 1.15.0.post1
+      # post release like 1.17.0.post1
       - output_types: [requirements, pyproject]
         matrices:
           - matrix:
               cuda: "12.*"
               cuda_suffixed: "true"
             packages:
-              - libucx-cu12>=1.15.0,<1.15.1
+              - libucx-cu12>=1.17.0,<1.17.1
           # this fallback is intentionally empty... it simplifies building from source
           # without CUDA, e.g. 'pip install .'
           - matrix: null
@@ -181,7 +181,7 @@ dependencies:
     common:
       - output_types: conda
         packages:
-          - ucx>=1.15.0,<1.19
+          - ucx>=1.17.0,<1.20
       - output_types: requirements
         packages:
           # pip recognizes the index as a global option for the requirements.txt file
@@ -194,7 +194,7 @@ dependencies:
               cuda: "12.*"
               cuda_suffixed: "true"
             packages:
-              - libucx-cu12>=1.15.0,<1.19
+              - libucx-cu12>=1.17.0,<1.20
           # this fallback is intentionally empty... it simplifies building from source
           # without CUDA, e.g. 'pip install .'
           - matrix: null
diff --git a/docs/source/install.rst b/docs/source/install.rst
index 24320c55..a2f70e2e 100644
--- a/docs/source/install.rst
+++ b/docs/source/install.rst
@@ -102,17 +102,17 @@ Test Dependencies
         dask distributed cloudpickle
 
 
-UCX >= 1.15.0
+UCX >= 1.17.0
 ^^^^^^^^^^^^^
 
-Instructions for building UCX >= 1.15.0 (minimum version supported by UCX-Py), make sure to change ``git checkout v1.15.0`` to a newer version if desired:
+Instructions for building UCX >= 1.17.0 (minimum version supported by UCX-Py), make sure to change ``git checkout v1.17.0`` to a newer version if desired:
 
 ::
 
     conda activate ucx
     git clone https://github.com/openucx/ucx
     cd ucx
-    git checkout v1.15.0
+    git checkout v1.17.0
     ./autogen.sh
     mkdir build
     cd build
@@ -134,13 +134,13 @@ It is possible to enable InfiniBand support via the conda-forge rdma-core packag
     conda install -c conda-forge c-compiler cxx-compiler gcc_linux-64=11.* rdma-core=28.*
 
 
-After installing the necessary dependencies, it's now time to build UCX from source, make sure to change ``git checkout v1.15.0`` to a newer version if desired:
+After installing the necessary dependencies, it's now time to build UCX from source, make sure to change ``git checkout v1.17.0`` to a newer version if desired:
 
 ::
 
     git clone https://github.com/openucx/ucx
     cd ucx
-    git checkout v1.15.0
+    git checkout v1.17.0
     ./autogen.sh
     mkdir build
     cd build
diff --git a/ucp/__init__.py b/ucp/__init__.py
index 53809d14..ad77a60e 100644
--- a/ucp/__init__.py
+++ b/ucp/__init__.py
@@ -41,7 +41,7 @@
 
 _ucx_version = get_ucx_version()
 
-__ucx_min_version__ = "1.15.0"
+__ucx_min_version__ = "1.17.0"
 __ucx_version__ = "%d.%d.%d" % _ucx_version
 
 if _ucx_version < tuple(int(i) for i in __ucx_min_version__.split(".")):

From 21d744c635fdbd2edd79dc420ccf2c42744f58b0 Mon Sep 17 00:00:00 2001
From: James Lamb <jaylamb20@gmail.com>
Date: Thu, 21 Aug 2025 15:09:01 -0500
Subject: [PATCH 05/11] Build and test with CUDA 13.0.0 (#1162)

Contributes to https://github.com/rapidsai/build-planning/issues/208

* uses CUDA 13.0.0 to build and test
* moves some dependency pins:
  - `cupy`: `>=13.6.0`

Contributes to https://github.com/rapidsai/build-planning/issues/68

* updates to CUDA 13 dependencies in fallback entries in `dependencies.yaml` matrices (i.e., the ones that get written to `pyproject.toml` in source control)

## Notes for Reviewers

This switches GitHub Actions workflows to the `cuda13.0` branch from here: https://github.com/rapidsai/shared-workflows/pull/413

A future round of PRs will revert that back to `branch-25.10`, once all of RAPIDS supports CUDA 13.

Authors:
  - James Lamb (https://github.com/jameslamb)

Approvers:
  - Peter Andreas Entschev (https://github.com/pentschev)
  - Bradley Dice (https://github.com/bdice)

URL: https://github.com/rapidsai/ucx-py/pull/1162
---
 .github/workflows/build.yaml                  |  8 +-
 .github/workflows/pr.yaml                     | 12 +--
 .github/workflows/test.yaml                   |  4 +-
 .../trigger-breaking-change-alert.yaml        |  2 +-
 .readthedocs.yml                              |  3 +-
 ci/run_benchmark_pytests.sh                   | 11 ++-
 conda/recipes/ucx-py/conda_build_config.yaml  |  3 +-
 dependencies.yaml                             | 86 ++++++++++++++++---
 docs/source/install.rst                       | 26 ++++--
 pyproject.toml                                |  3 +-
 setup.py                                      |  4 +-
 tests/test_custom_send_recv.py                |  8 +-
 tests/test_send_recv.py                       | 10 ++-
 13 files changed, 131 insertions(+), 49 deletions(-)

diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 502f5d3f..7b0cabf4 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -34,7 +34,7 @@ concurrency:
 jobs:
   conda-python-build:
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/conda-python-build.yaml@branch-25.10
+    uses: rapidsai/shared-workflows/.github/workflows/conda-python-build.yaml@cuda13.0
     with:
       build_type: ${{ inputs.build_type || 'branch' }}
       branch: ${{ inputs.branch }}
@@ -44,7 +44,7 @@ jobs:
   upload-conda:
     needs: [conda-python-build]
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/conda-upload-packages.yaml@branch-25.10
+    uses: rapidsai/shared-workflows/.github/workflows/conda-upload-packages.yaml@cuda13.0
     with:
       build_type: ${{ inputs.build_type || 'branch' }}
       branch: ${{ inputs.branch }}
@@ -52,7 +52,7 @@ jobs:
       sha: ${{ inputs.sha }}
   wheel-build:
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-build.yaml@branch-25.10
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-build.yaml@cuda13.0
     with:
       build_type: ${{ inputs.build_type || 'branch' }}
       branch: ${{ inputs.branch }}
@@ -64,7 +64,7 @@ jobs:
   wheel-publish:
     needs: wheel-build
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-publish.yaml@branch-25.10
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-publish.yaml@cuda13.0
     with:
       build_type: ${{ inputs.build_type || 'branch' }}
       branch: ${{ inputs.branch }}
diff --git a/.github/workflows/pr.yaml b/.github/workflows/pr.yaml
index a2a23ec2..2d7a2db9 100644
--- a/.github/workflows/pr.yaml
+++ b/.github/workflows/pr.yaml
@@ -16,7 +16,7 @@ jobs:
       - wheel-tests
       - telemetry-setup
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/pr-builder.yaml@branch-25.10
+    uses: rapidsai/shared-workflows/.github/workflows/pr-builder.yaml@cuda13.0
     with:
       needs: ${{ toJSON(needs) }}
   telemetry-setup:
@@ -33,20 +33,20 @@ jobs:
   checks:
     secrets: inherit
     needs: telemetry-setup
-    uses: rapidsai/shared-workflows/.github/workflows/checks.yaml@branch-25.10
+    uses: rapidsai/shared-workflows/.github/workflows/checks.yaml@cuda13.0
     with:
       ignored_pr_jobs: telemetry-summarize
   conda-python-build:
     needs: checks
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/conda-python-build.yaml@branch-25.10
+    uses: rapidsai/shared-workflows/.github/workflows/conda-python-build.yaml@cuda13.0
     with:
       build_type: pull-request
       script: ci/build_python.sh
   conda-python-tests:
     needs: conda-python-build
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/conda-python-tests.yaml@branch-25.10
+    uses: rapidsai/shared-workflows/.github/workflows/conda-python-tests.yaml@cuda13.0
     with:
       build_type: pull-request
       container-options: "--cap-add CAP_SYS_PTRACE --shm-size=8g --ulimit=nofile=1000000:1000000"
@@ -54,7 +54,7 @@ jobs:
   wheel-build:
     needs: checks
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-build.yaml@branch-25.10
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-build.yaml@cuda13.0
     with:
       build_type: pull-request
       script: ci/build_wheel.sh
@@ -63,7 +63,7 @@ jobs:
   wheel-tests:
     needs: wheel-build
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-test.yaml@branch-25.10
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-test.yaml@cuda13.0
     with:
       build_type: pull-request
       script: ci/test_wheel.sh
diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 4403315b..7e6eb506 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -25,7 +25,7 @@ on:
 jobs:
   conda-python-tests:
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/conda-python-tests.yaml@branch-25.10
+    uses: rapidsai/shared-workflows/.github/workflows/conda-python-tests.yaml@cuda13.0
     with:
       build_type: ${{ inputs.build_type }}
       branch: ${{ inputs.branch }}
@@ -35,7 +35,7 @@ jobs:
       container-options: "--cap-add CAP_SYS_PTRACE --shm-size=8g --ulimit=nofile=1000000:1000000"
   wheel-tests:
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-test.yaml@branch-25.10
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-test.yaml@cuda13.0
     with:
       build_type: ${{ inputs.build_type }}
       branch: ${{ inputs.branch }}
diff --git a/.github/workflows/trigger-breaking-change-alert.yaml b/.github/workflows/trigger-breaking-change-alert.yaml
index 48bf37af..72751d07 100644
--- a/.github/workflows/trigger-breaking-change-alert.yaml
+++ b/.github/workflows/trigger-breaking-change-alert.yaml
@@ -12,7 +12,7 @@ jobs:
   trigger-notifier:
     if: contains(github.event.pull_request.labels.*.name, 'breaking')
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/breaking-change-alert.yaml@branch-25.10
+    uses: rapidsai/shared-workflows/.github/workflows/breaking-change-alert.yaml@cuda13.0
     with:
       sender_login: ${{ github.event.sender.login }}
       sender_avatar: ${{ github.event.sender.avatar_url }}
diff --git a/.readthedocs.yml b/.readthedocs.yml
index 7106d0eb..1bb8c5cd 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -10,7 +10,8 @@ build:
       # is pulled in, and therefore tested in this no-CUDA environment
       - |
         pip install \
-          -C rapidsai.matrix-entry="cuda=12.x;cuda_suffixed=true" \
+          --extra-index-url https://pypi.anaconda.org/rapidsai-wheels-nightly/simple/ \
+          -C rapidsai.matrix-entry="cuda=13.x;cuda_suffixed=true" \
           .
 
 conda:
diff --git a/ci/run_benchmark_pytests.sh b/ci/run_benchmark_pytests.sh
index e23473e2..494b2cd3 100755
--- a/ci/run_benchmark_pytests.sh
+++ b/ci/run_benchmark_pytests.sh
@@ -1,5 +1,5 @@
 #!/bin/bash
-# Copyright (c) 2024, NVIDIA CORPORATION.
+# Copyright (c) 2024-2025, NVIDIA CORPORATION.
 
 set -euo pipefail
 
@@ -8,5 +8,12 @@ set -euo pipefail
 pushd /
 timeout 1m python -m ucp.benchmarks.send_recv -o cupy --server-dev 0 --client-dev 0 --reuse-alloc --backend ucp-async
 timeout 1m python -m ucp.benchmarks.send_recv -o cupy --server-dev 0 --client-dev 0 --reuse-alloc --backend ucp-core
-timeout 1m python -m ucp.benchmarks.cudf_merge --chunks-per-dev 4 --chunk-size 10000 --rmm-init-pool-size 2097152
+
+# TODO: run cudf_merge benchmark unconditionally once there are CUDA 13 cudf packages
+# ref: https://github.com/rapidsai/ucx-py/pull/1162#issuecomment-3210841342
+if [[ $(python -c "import cudf") ]]; then
+    timeout 1m python -m ucp.benchmarks.cudf_merge --chunks-per-dev 4 --chunk-size 10000 --rmm-init-pool-size 2097152
+else
+    echo "'cudf' not installed, skipping cudf_merge benchmark"
+fi
 popd
diff --git a/conda/recipes/ucx-py/conda_build_config.yaml b/conda/recipes/ucx-py/conda_build_config.yaml
index 5dea1a47..85376f88 100644
--- a/conda/recipes/ucx-py/conda_build_config.yaml
+++ b/conda/recipes/ucx-py/conda_build_config.yaml
@@ -5,4 +5,5 @@ cxx_compiler_version:
   - 14
 
 ucx:
-  - "==1.17.*"
+  - "==1.17.*"  # [os.environ.get("RAPIDS_CUDA_VERSION", "").startswith("12")]
+  - "==1.19.*"  # [not os.environ.get("RAPIDS_CUDA_VERSION", "").startswith("12")]
diff --git a/dependencies.yaml b/dependencies.yaml
index b9d83e7b..706cdb8b 100644
--- a/dependencies.yaml
+++ b/dependencies.yaml
@@ -6,6 +6,7 @@ files:
       - checks
       - cuda
       - cuda_version
+      - depends_on_cudf
       - depends_on_cupy
       - py_version
       - rapids_build_setuptools
@@ -15,6 +16,7 @@ files:
     output: none
     includes:
       - cuda_version
+      - depends_on_cudf
       - depends_on_cupy
       - py_version
       - test_ucx_py
@@ -55,6 +57,7 @@ files:
       table: project.optional-dependencies
       key: test
     includes:
+      - depends_on_cudf
       - depends_on_cupy
       - test_python
 channels:
@@ -91,14 +94,15 @@ dependencies:
               cuda: "12.9"
             packages:
               - cuda-version=12.9
-  cuda:
-    specific:
-      - output_types: conda
-        matrices:
           - matrix:
-              cuda: "12.*"
+              cuda: "13.0"
             packages:
-              - cuda-cudart
+              - cuda-version=13.0
+  cuda:
+    common:
+      - output_types: [conda]
+        packages:
+          - cuda-cudart
   py_version:
     specific:
       - output_types: conda
@@ -143,16 +147,21 @@ dependencies:
     common:
       - output_types: conda
         packages:
-          - cupy>=12.0.0
+          - cupy>=13.6.0
     # NOTE: This is intentionally not broken into groups by a 'cuda_suffixed' selector like
     #       other packages with -cu{nn}x suffixes in this file.
     #       All RAPIDS wheel builds (including in devcontainers) expect cupy to be suffixed.
     specific:
       - output_types: [requirements, pyproject]
         matrices:
-          - matrix: # All CUDA 12 versions
+          - matrix:
+              cuda: "12.*"
+            packages:
+              - cupy-cuda12x>=13.6.0
+          # fallback to CUDA 13 versions if 'cuda' is '13.*' or not provided
+          - matrix:
             packages:
-              - cupy-cuda12x>=12.0.0
+              - &cupy_cu13 cupy-cuda13x>=13.6.0
   depends_on_ucx_build:
     common:
       - output_types: conda
@@ -173,21 +182,33 @@ dependencies:
               cuda_suffixed: "true"
             packages:
               - libucx-cu12>=1.17.0,<1.17.1
+          - matrix:
+              cuda: "13.*"
+              cuda_suffixed: "true"
+            packages:
+              - libucx-cu13>=1.19.0,<1.19.1
           # this fallback is intentionally empty... it simplifies building from source
           # without CUDA, e.g. 'pip install .'
           - matrix: null
             packages: null
   depends_on_ucx_run:
     common:
-      - output_types: conda
-        packages:
-          - ucx>=1.17.0,<1.20
       - output_types: requirements
         packages:
           # pip recognizes the index as a global option for the requirements.txt file
           - --extra-index-url=https://pypi.nvidia.com
           - --extra-index-url=https://pypi.anaconda.org/rapidsai-wheels-nightly/simple
     specific:
+      - output_types: [conda]
+        matrices:
+          - matrix:
+              cuda: "12.*"
+            packages:
+              - ucx>=1.17.0,<1.20
+          # require at least 1.19.0 on CUDA 13 (and make that the default when 'cuda' filter is not provided)
+          - matrix:
+            packages:
+              - ucx>=1.19.0,<1.20
       - output_types: [requirements, pyproject]
         matrices:
           - matrix:
@@ -195,6 +216,11 @@ dependencies:
               cuda_suffixed: "true"
             packages:
               - libucx-cu12>=1.17.0,<1.20
+          - matrix:
+              cuda: "13.*"
+              cuda_suffixed: "true"
+            packages:
+              - libucx-cu13>=1.19.0,<1.20
           # this fallback is intentionally empty... it simplifies building from source
           # without CUDA, e.g. 'pip install .'
           - matrix: null
@@ -217,8 +243,39 @@ dependencies:
           - pytest-rerunfailures
       - output_types: [conda]
         packages:
-          - &cudf_unsuffixed cudf==25.10.*,>=0.0.0a0
+          - &numba_cuda numba-cuda>=0.19.0,<0.20.0a0
+    specific:
+      - output_types: [requirements, pyproject]
+        matrices:
+          - matrix:
+              cuda: "12.*"
+            packages:
+              - numba-cuda[cu12]>=0.19.0,<0.20.0a0
+          # fallback to CUDA 13 versions if 'cuda' is '13.*' or not provided
+          - matrix:
+            packages:
+              - numba-cuda[cu13]>=0.19.0,<0.20.0a0
+  # TODO: re-include cudf on CUDA 13 here once cudf CUDA 13 packages exist
+  # ref: https://github.com/rapidsai/ucx-py/pull/1162#issuecomment-3210841342
+  depends_on_cudf:
+    common:
+      - output_types: requirements
+        packages:
+          # pip recognizes the index as a global option for the requirements.txt file
+          - --extra-index-url=https://pypi.anaconda.org/rapidsai-wheels-nightly/simple
     specific:
+      - output_types: [conda]
+        matrices:
+          - matrix:
+              cuda: "12.*"
+            packages:
+              - &cudf_unsuffixed cudf==25.10.*,>=0.0.0a0
+          - matrix:
+              cuda: "13.*"
+            packages:
+          - matrix:
+            packages:
+              - *cudf_unsuffixed
       - output_types: [requirements, pyproject]
         matrices:
           - matrix:
@@ -227,5 +284,6 @@ dependencies:
             packages:
               - cudf-cu12==25.10.*,>=0.0.0a0
           - matrix:
+              cuda: "13.*"
             packages:
-              - *cudf_unsuffixed
+          - {matrix: null, packages: [*cudf_unsuffixed]}
diff --git a/docs/source/install.rst b/docs/source/install.rst
index a2f70e2e..f4cb7b7a 100644
--- a/docs/source/install.rst
+++ b/docs/source/install.rst
@@ -40,6 +40,10 @@ Change `cuda-version` to pin to a different CUDA minor version if you'd like.
 
 ::
 
+    # CUDA 13
+    conda create -n ucx -c conda-forge -c rapidsai \
+      cuda-version=13.0 ucx-py
+
     # CUDA 12
     conda create -n ucx -c conda-forge -c rapidsai \
       cuda-version=12.9 ucx-py
@@ -52,8 +56,8 @@ be done if desired (e.g., to test for new capabilities or bug fixes).
 PyPI
 ----
 
-PyPI installation is possible and currently supports CUDA version
-``12``. Packages are compatible with CPU-only workloads and any one can
+PyPI installation is possible and currently supports CUDA versions
+``12`` and ``13``. Packages are compatible with CPU-only workloads and any one can
 be chosen if the application doesn't use CUDA, but currently there are
 no pre-built CPU-only packages available, so the CUDA package must be
 installed instead. CUDA versions are differentiated by the suffix
@@ -61,6 +65,9 @@ installed instead. CUDA versions are differentiated by the suffix
 
 ::
 
+    # CUDA 13
+    pip install ucx-py-cu13
+
     # CUDA 12
     pip install ucx-py-cu12
 
@@ -210,7 +217,7 @@ Installing UCX-Py from source in a pip-only environment has additional limitatio
 UCX-Py with UCX from PyPI
 ^^^^^^^^^^^^^^^^^^^^^^^^^
 
-CUDA-enabled builds of the UCX libraries are available from PyPI, under the name ``libucx-cu12``.
+CUDA-enabled builds of the UCX libraries are available from PyPI, under the names ``libucx-cu12`` (CUDA 12) and ``libucx-cu13`` (CUDA 13).
 Notice that those builds do not currently include InfiniBand support, if InfiniBand is required you will
 need to provide a custom UCX install as described in the "UCX-Py with custom UCX install" section.
 
@@ -225,19 +232,22 @@ To build UCX-Py using those UCX packages (to avoid needing to build UCX from sou
     # or for develop build
     pip install -v -e .
 
-This will automatically handle installing appropriate, compatible ``libucx-cu12`` packages for build-time and runtime use.
-When you run UCX-Py code installed this way, it will load UCX libraries from the installed ``libucx-cu12`` package.
+This will automatically handle installing appropriate, compatible ``libucx-cu{12,13}`` packages for build-time and runtime use.
+When you run UCX-Py code installed this way, it will load UCX libraries from the installed ``libucx-cu{12,13}`` package.
 
 UCX-Py packages are built against the oldest version of UCX that UCX-Py supports, and can run against a range
 of ABI-compatible UCX versions.
 
 You can use packages from PyPI to customize the UCX version used at runtime.
-For example, to switch to using UCX 1.16 at runtime, run the following.
+For example, to switch to using UCX 1.19 at runtime, run the following.
 
 ::
 
+    # CUDA 13
+    pip install 'libucx-cu13>=1.19.0,<1.20'
+
     # CUDA 12
-    pip install 'libucx-cu12>=1.16.0,<1.17'
+    pip install 'libucx-cu12>=1.19.0,<1.20'
 
 
 UCX-Py with UCX system install
@@ -254,7 +264,7 @@ If a UCX system install is available, building and installing UCX-Py can be done
     # or for develop build
     pip install -v -e .
 
-To ensure that system install of UCX is always used at runtime (and not the ``libucx-cu12`` wheels), set the following
+To ensure that system install of UCX is always used at runtime (and not the ``libucx-cu{12,13}`` wheels), set the following
 environment variable in the runtime environment.
 
 ::
diff --git a/pyproject.toml b/pyproject.toml
index 3188b7db..888e3790 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -49,8 +49,9 @@ classifiers = [
 test = [
     "cloudpickle",
     "cudf==25.10.*,>=0.0.0a0",
-    "cupy-cuda12x>=12.0.0",
+    "cupy-cuda13x>=13.6.0",
     "distributed",
+    "numba-cuda[cu13]>=0.19.0,<0.20.0a0",
     "numba>=0.59.1,<0.62.0a0",
     "pytest-asyncio",
     "pytest-rerunfailures",
diff --git a/setup.py b/setup.py
index 2c238c3c..4e849eba 100644
--- a/setup.py
+++ b/setup.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2018-2021, NVIDIA CORPORATION. All rights reserved.
+# Copyright (c) 2018-2025, NVIDIA CORPORATION. All rights reserved.
 # See file LICENSE for terms.
 
 # This file is a copy of what is available in a Cython demo + some additions
@@ -58,7 +58,7 @@ def _find_libucx_libs_and_headers():
 include_dirs = [os.path.dirname(get_python_inc())]
 library_dirs = [get_config_var("LIBDIR")]
 libraries = ["ucp", "uct", "ucm", "ucs"]
-extra_compile_args = ["-std=c99", "-Werror"]
+extra_compile_args = ["-std=c99", "-Werror", "-Wno-error=sign-compare"]
 
 # tell the compiler and linker where to find UCX libraries and their headers
 # provided by the 'libucx' wheel
diff --git a/tests/test_custom_send_recv.py b/tests/test_custom_send_recv.py
index 2f1e5860..667ebb61 100644
--- a/tests/test_custom_send_recv.py
+++ b/tests/test_custom_send_recv.py
@@ -1,6 +1,9 @@
+# Copyright (c) 2020-2025, NVIDIA CORPORATION. All rights reserved.
+# See file LICENSE for terms.
 import asyncio
 import pickle
 
+import numba.cuda
 import numpy as np
 import pytest
 
@@ -8,7 +11,6 @@
 
 cudf = pytest.importorskip("cudf")
 distributed = pytest.importorskip("distributed")
-cuda = pytest.importorskip("numba.cuda")
 
 
 @pytest.mark.asyncio
@@ -75,14 +77,14 @@ async def read(self):
                 for is_cuda, size in zip(is_cudas.tolist(), sizes.tolist()):
                     if size > 0:
                         if is_cuda:
-                            frame = cuda.device_array((size,), dtype=np.uint8)
+                            frame = numba.cuda.device_array((size,), dtype=np.uint8)
                         else:
                             frame = np.empty(size, dtype=np.uint8)
                         await self.ep.recv(frame)
                         frames.append(frame)
                     else:
                         if is_cuda:
-                            frames.append(cuda.device_array((0,), dtype=np.uint8))
+                            frames.append(numba.cuda.device_array((0,), dtype=np.uint8))
                         else:
                             frames.append(b"")
                 return frames
diff --git a/tests/test_send_recv.py b/tests/test_send_recv.py
index 32da940e..4af28fea 100644
--- a/tests/test_send_recv.py
+++ b/tests/test_send_recv.py
@@ -1,3 +1,5 @@
+# Copyright (c) 2020-2025, NVIDIA CORPORATION. All rights reserved.
+# See file LICENSE for terms.
 import functools
 
 import pytest
@@ -102,18 +104,18 @@ async def test_send_recv_cupy(size, dtype, blocking_progress_mode):
 @pytest.mark.parametrize("blocking_progress_mode", [True, False])
 async def test_send_recv_numba(size, dtype, blocking_progress_mode):
     ucp.init(blocking_progress_mode=blocking_progress_mode)
-    cuda = pytest.importorskip("numba.cuda")
+    import numba.cuda
 
     ary = np.arange(size, dtype=dtype)
-    msg = cuda.to_device(ary)
+    msg = numba.cuda.to_device(ary)
     msg_size = np.array([msg.nbytes], dtype=np.uint64)
     listener = ucp.create_listener(
-        make_echo_server(lambda n: cuda.device_array((n,), dtype=np.uint8))
+        make_echo_server(lambda n: numba.cuda.device_array((n,), dtype=np.uint8))
     )
     client = await ucp.create_endpoint(ucp.get_address(), listener.port)
     await client.send(msg_size)
     await client.send(msg)
-    resp = cuda.device_array_like(msg)
+    resp = numba.cuda.device_array_like(msg)
     await client.recv(resp)
     np.testing.assert_array_equal(np.array(resp), np.array(msg))
 

From 83fe5f5119ae4a19f65a9f83597bf0a427a52f67 Mon Sep 17 00:00:00 2001
From: Kyle Edwards <kyedwards@nvidia.com>
Date: Tue, 26 Aug 2025 16:26:49 -0400
Subject: [PATCH 06/11] Update rapids-dependency-file-generator (#1163)

This PR updates the rapids-dependency-file-generator hook to get https://github.com/rapidsai/dependency-file-generator/pull/163.

Authors:
  - Kyle Edwards (https://github.com/KyleFromNVIDIA)

Approvers:
  - James Lamb (https://github.com/jameslamb)

URL: https://github.com/rapidsai/ucx-py/pull/1163
---
 .pre-commit-config.yaml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 22db32f8..10200da8 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -32,9 +32,9 @@ repos:
                   - --fix
                   - --rapids-version-file=RAPIDS_VERSION
       - repo: https://github.com/rapidsai/dependency-file-generator
-        rev: v1.19.0
+        rev: v1.20.0
         hooks:
               - id: rapids-dependency-file-generator
-                args: ["--clean"]
+                args: ["--clean", "--warn-all", "--strict"]
 default_language_version:
       python: python3

From 75c49e661947d55efda3f2bcdf6d72bb1bf01e91 Mon Sep 17 00:00:00 2001
From: James Lamb <jlamb@nvidia.com>
Date: Fri, 29 Aug 2025 13:48:31 -0500
Subject: [PATCH 07/11] restore cudf dependency (#1164)

Contributes to https://github.com/rapidsai/build-planning/issues/208

#1162 temporarily removed the `cudf` test-time dependency here, because there weren't yet CUDA 13 `cudf` packages.

Those now exist (https://github.com/rapidsai/cudf/pull/19768), so this restores that dependency.

Authors:
  - James Lamb (https://github.com/jameslamb)

Approvers:
  - Peter Andreas Entschev (https://github.com/pentschev)
  - Vyas Ramasubramani (https://github.com/vyasr)

URL: https://github.com/rapidsai/ucx-py/pull/1164
---
 ci/run_benchmark_pytests.sh |  9 +--------
 dependencies.yaml           | 18 ++++--------------
 2 files changed, 5 insertions(+), 22 deletions(-)

diff --git a/ci/run_benchmark_pytests.sh b/ci/run_benchmark_pytests.sh
index 494b2cd3..10bb7415 100755
--- a/ci/run_benchmark_pytests.sh
+++ b/ci/run_benchmark_pytests.sh
@@ -8,12 +8,5 @@ set -euo pipefail
 pushd /
 timeout 1m python -m ucp.benchmarks.send_recv -o cupy --server-dev 0 --client-dev 0 --reuse-alloc --backend ucp-async
 timeout 1m python -m ucp.benchmarks.send_recv -o cupy --server-dev 0 --client-dev 0 --reuse-alloc --backend ucp-core
-
-# TODO: run cudf_merge benchmark unconditionally once there are CUDA 13 cudf packages
-# ref: https://github.com/rapidsai/ucx-py/pull/1162#issuecomment-3210841342
-if [[ $(python -c "import cudf") ]]; then
-    timeout 1m python -m ucp.benchmarks.cudf_merge --chunks-per-dev 4 --chunk-size 10000 --rmm-init-pool-size 2097152
-else
-    echo "'cudf' not installed, skipping cudf_merge benchmark"
-fi
+timeout 1m python -m ucp.benchmarks.cudf_merge --chunks-per-dev 4 --chunk-size 10000 --rmm-init-pool-size 2097152
 popd
diff --git a/dependencies.yaml b/dependencies.yaml
index 706cdb8b..e2c6a94f 100644
--- a/dependencies.yaml
+++ b/dependencies.yaml
@@ -255,27 +255,16 @@ dependencies:
           - matrix:
             packages:
               - numba-cuda[cu13]>=0.19.0,<0.20.0a0
-  # TODO: re-include cudf on CUDA 13 here once cudf CUDA 13 packages exist
-  # ref: https://github.com/rapidsai/ucx-py/pull/1162#issuecomment-3210841342
   depends_on_cudf:
     common:
+      - output_types: [conda]
+        packages:
+          - &cudf_unsuffixed cudf==25.10.*,>=0.0.0a0
       - output_types: requirements
         packages:
           # pip recognizes the index as a global option for the requirements.txt file
           - --extra-index-url=https://pypi.anaconda.org/rapidsai-wheels-nightly/simple
     specific:
-      - output_types: [conda]
-        matrices:
-          - matrix:
-              cuda: "12.*"
-            packages:
-              - &cudf_unsuffixed cudf==25.10.*,>=0.0.0a0
-          - matrix:
-              cuda: "13.*"
-            packages:
-          - matrix:
-            packages:
-              - *cudf_unsuffixed
       - output_types: [requirements, pyproject]
         matrices:
           - matrix:
@@ -286,4 +275,5 @@ dependencies:
           - matrix:
               cuda: "13.*"
             packages:
+              - cudf-cu13==25.10.*,>=0.0.0a0
           - {matrix: null, packages: [*cudf_unsuffixed]}

From 77470e19f76fd87bb075f5cd0a6aa9542b538b1b Mon Sep 17 00:00:00 2001
From: James Lamb <jlamb@nvidia.com>
Date: Wed, 3 Sep 2025 08:41:47 -0500
Subject: [PATCH 08/11] use 'nvidia-ml-py' package for 'pynvml' module (#1165)

Contributes to https://github.com/rapidsai/build-infra/issues/293

The `pynvml` *package* (https://github.com/gpuopenanalytics/pynvml) provides 2 things:

* the `pynvml` **Python module**, transitively via a dependency on the `nvidia-ml-py` package
* the `pynvml_utils` Python module

This project's doesn't need the `pynvml_utils` Python module, so this PR proposes dropping the dependency on the `pynvml` package in favor of `nvidia-ml-py`.

## Notes for Reviewers

I know this project's about to be archived (#1160), but that is still in progress and not guaranteed to be done in time for the 25.10 release.

Proposing making this change to help completely remove the `pynvml` package from RAPIDS environments, so we can test that it's truly safe to do that.

Authors:
  - James Lamb (https://github.com/jameslamb)

Approvers:
  - Vyas Ramasubramani (https://github.com/vyasr)
  - Peter Andreas Entschev (https://github.com/pentschev)

URL: https://github.com/rapidsai/ucx-py/pull/1165
---
 conda/recipes/ucx-py/recipe.yaml | 4 +++-
 dependencies.yaml                | 4 +++-
 pyproject.toml                   | 2 +-
 3 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/conda/recipes/ucx-py/recipe.yaml b/conda/recipes/ucx-py/recipe.yaml
index a0726bc3..1d59a7d6 100644
--- a/conda/recipes/ucx-py/recipe.yaml
+++ b/conda/recipes/ucx-py/recipe.yaml
@@ -35,7 +35,9 @@ requirements:
     - ucx
   run:
     - numpy>=1.23,<3.0a0
-    - pynvml>=12.0.0,<13.0.0a0
+    # 'nvidia-ml-py' provides the 'pynvml' module, since v12.560.30
+    # ref: https://github.com/conda-forge/nvidia-ml-py-feedstock/pull/24
+    - nvidia-ml-py>=12.560.30
     - python
     - ucx >=1.17.0,<1.20.0
   ignore_run_exports:
diff --git a/dependencies.yaml b/dependencies.yaml
index e2c6a94f..1ef0e2f9 100644
--- a/dependencies.yaml
+++ b/dependencies.yaml
@@ -142,7 +142,9 @@ dependencies:
       - output_types: [conda, requirements, pyproject]
         packages:
           - numpy>=1.23,<3.0a0
-          - pynvml>=12.0.0,<13.0.0a0
+          # 'nvidia-ml-py' provides the 'pynvml' module, since v12.560.30
+          # ref: https://github.com/conda-forge/nvidia-ml-py-feedstock/pull/24
+          - nvidia-ml-py>=12.560.30
   depends_on_cupy:
     common:
       - output_types: conda
diff --git a/pyproject.toml b/pyproject.toml
index 888e3790..bd10c830 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,7 +31,7 @@ license = { text = "BSD-3-Clause" }
 requires-python = ">=3.10"
 dependencies = [
     "numpy>=1.23,<3.0a0",
-    "pynvml>=12.0.0,<13.0.0a0",
+    "nvidia-ml-py>=12.560.30",
 ] # This list was generated by `rapids-dependency-file-generator`. To make changes, edit dependencies.yaml and run `rapids-dependency-file-generator`.
 classifiers = [
     "Intended Audience :: Developers",

From b7428920faad7bb73a1fb3c38ff7e77bad170fc0 Mon Sep 17 00:00:00 2001
From: James Lamb <jaylamb20@gmail.com>
Date: Fri, 5 Sep 2025 15:03:44 -0500
Subject: [PATCH 09/11] Merge pull request #1166 from
 jameslamb/update-cuda13-workflow-refs

Use branch-25.10 again
---
 .github/workflows/build.yaml                         |  8 ++++----
 .github/workflows/pr.yaml                            | 12 ++++++------
 .github/workflows/test.yaml                          |  4 ++--
 .github/workflows/trigger-breaking-change-alert.yaml |  2 +-
 4 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 7b0cabf4..502f5d3f 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -34,7 +34,7 @@ concurrency:
 jobs:
   conda-python-build:
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/conda-python-build.yaml@cuda13.0
+    uses: rapidsai/shared-workflows/.github/workflows/conda-python-build.yaml@branch-25.10
     with:
       build_type: ${{ inputs.build_type || 'branch' }}
       branch: ${{ inputs.branch }}
@@ -44,7 +44,7 @@ jobs:
   upload-conda:
     needs: [conda-python-build]
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/conda-upload-packages.yaml@cuda13.0
+    uses: rapidsai/shared-workflows/.github/workflows/conda-upload-packages.yaml@branch-25.10
     with:
       build_type: ${{ inputs.build_type || 'branch' }}
       branch: ${{ inputs.branch }}
@@ -52,7 +52,7 @@ jobs:
       sha: ${{ inputs.sha }}
   wheel-build:
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-build.yaml@cuda13.0
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-build.yaml@branch-25.10
     with:
       build_type: ${{ inputs.build_type || 'branch' }}
       branch: ${{ inputs.branch }}
@@ -64,7 +64,7 @@ jobs:
   wheel-publish:
     needs: wheel-build
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-publish.yaml@cuda13.0
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-publish.yaml@branch-25.10
     with:
       build_type: ${{ inputs.build_type || 'branch' }}
       branch: ${{ inputs.branch }}
diff --git a/.github/workflows/pr.yaml b/.github/workflows/pr.yaml
index 2d7a2db9..a2a23ec2 100644
--- a/.github/workflows/pr.yaml
+++ b/.github/workflows/pr.yaml
@@ -16,7 +16,7 @@ jobs:
       - wheel-tests
       - telemetry-setup
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/pr-builder.yaml@cuda13.0
+    uses: rapidsai/shared-workflows/.github/workflows/pr-builder.yaml@branch-25.10
     with:
       needs: ${{ toJSON(needs) }}
   telemetry-setup:
@@ -33,20 +33,20 @@ jobs:
   checks:
     secrets: inherit
     needs: telemetry-setup
-    uses: rapidsai/shared-workflows/.github/workflows/checks.yaml@cuda13.0
+    uses: rapidsai/shared-workflows/.github/workflows/checks.yaml@branch-25.10
     with:
       ignored_pr_jobs: telemetry-summarize
   conda-python-build:
     needs: checks
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/conda-python-build.yaml@cuda13.0
+    uses: rapidsai/shared-workflows/.github/workflows/conda-python-build.yaml@branch-25.10
     with:
       build_type: pull-request
       script: ci/build_python.sh
   conda-python-tests:
     needs: conda-python-build
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/conda-python-tests.yaml@cuda13.0
+    uses: rapidsai/shared-workflows/.github/workflows/conda-python-tests.yaml@branch-25.10
     with:
       build_type: pull-request
       container-options: "--cap-add CAP_SYS_PTRACE --shm-size=8g --ulimit=nofile=1000000:1000000"
@@ -54,7 +54,7 @@ jobs:
   wheel-build:
     needs: checks
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-build.yaml@cuda13.0
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-build.yaml@branch-25.10
     with:
       build_type: pull-request
       script: ci/build_wheel.sh
@@ -63,7 +63,7 @@ jobs:
   wheel-tests:
     needs: wheel-build
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-test.yaml@cuda13.0
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-test.yaml@branch-25.10
     with:
       build_type: pull-request
       script: ci/test_wheel.sh
diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 7e6eb506..4403315b 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -25,7 +25,7 @@ on:
 jobs:
   conda-python-tests:
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/conda-python-tests.yaml@cuda13.0
+    uses: rapidsai/shared-workflows/.github/workflows/conda-python-tests.yaml@branch-25.10
     with:
       build_type: ${{ inputs.build_type }}
       branch: ${{ inputs.branch }}
@@ -35,7 +35,7 @@ jobs:
       container-options: "--cap-add CAP_SYS_PTRACE --shm-size=8g --ulimit=nofile=1000000:1000000"
   wheel-tests:
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/wheels-test.yaml@cuda13.0
+    uses: rapidsai/shared-workflows/.github/workflows/wheels-test.yaml@branch-25.10
     with:
       build_type: ${{ inputs.build_type }}
       branch: ${{ inputs.branch }}
diff --git a/.github/workflows/trigger-breaking-change-alert.yaml b/.github/workflows/trigger-breaking-change-alert.yaml
index 72751d07..48bf37af 100644
--- a/.github/workflows/trigger-breaking-change-alert.yaml
+++ b/.github/workflows/trigger-breaking-change-alert.yaml
@@ -12,7 +12,7 @@ jobs:
   trigger-notifier:
     if: contains(github.event.pull_request.labels.*.name, 'breaking')
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/breaking-change-alert.yaml@cuda13.0
+    uses: rapidsai/shared-workflows/.github/workflows/breaking-change-alert.yaml@branch-25.10
     with:
       sender_login: ${{ github.event.sender.login }}
       sender_avatar: ${{ github.event.sender.avatar_url }}

From 51f87cd97adc9584b8441402ea797e029bfc6496 Mon Sep 17 00:00:00 2001
From: Peter Andreas Entschev <peter@entschev.com>
Date: Tue, 16 Sep 2025 11:41:07 +0200
Subject: [PATCH 10/11] Add deprecation warning to docs (#1167)

Add a deprecation warning to docs to advise users to migrate to UCXX.

Authors:
  - Peter Andreas Entschev (https://github.com/pentschev)

Approvers:
  - Mads R. B. Kristensen (https://github.com/madsbk)

URL: https://github.com/rapidsai/ucx-py/pull/1167
---
 docs/source/index.rst | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/docs/source/index.rst b/docs/source/index.rst
index a531e189..e2d58b7b 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -1,6 +1,10 @@
 UCX-Py
 ======
 
+.. warning::
+
+    UCX-Py is deprecated, version 0.45 was its last release and it will receive no further updates. Users are advised to migrate to `UCXX <https://github.com/rapidsai/ucxx>`_ immediately. `UCXX documentation <https://docs.rapids.ai/api/ucxx/nightly/>`_.
+
 UCX-Py is the Python interface for `UCX <https://github.com/openucx/ucx>`_, a low-level high-performance networking library.  UCX and UCX-Py supports several transport methods including InfiniBand and NVLink while still using traditional networking protocols like TCP.
 
 

From 93b2e9de975129db192d853e7824a079bc2a77cf Mon Sep 17 00:00:00 2001
From: Peter Andreas Entschev <peter@entschev.com>
Date: Thu, 18 Sep 2025 17:37:38 +0200
Subject: [PATCH 11/11] Make final discontinuation changes (#1169)

This is expected to be the last commit to UCX-Py. It updates the README and docs warnings to inform users that UCX-Py has been permanently discontinued. Along with it, this change removes CUDA 13 mentions from docs, since there will be no CUDA 13 packages released for UCX-Py, however, the functional changes to allow building with CUDA 13 are kept should those be needed for any reason in the near-term.

Authors:
  - Peter Andreas Entschev (https://github.com/pentschev)

Approvers:
  - James Lamb (https://github.com/jameslamb)
  - Mads R. B. Kristensen (https://github.com/madsbk)

URL: https://github.com/rapidsai/ucx-py/pull/1169
---
 README.md               |  4 ++--
 docs/source/conf.py     |  8 ++++----
 docs/source/index.rst   |  2 +-
 docs/source/install.rst | 41 +++++++++++++++--------------------------
 4 files changed, 22 insertions(+), 33 deletions(-)

diff --git a/README.md b/README.md
index 0d8cbe1b..4cb3bc87 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
-> [!WARNING]
-> UCX-Py is deprecated and will be phased out soon, version 0.45 (RAPIDS 25.08) is expected to be the last release. Projects that rely on UCX-Py are advised to migrate to [UCXX](https://github.com/rapidsai/ucxx) immediately.
+> [!CAUTION]
+> UCX-Py has been discontinued, version 0.45 (RAPIDS 25.08) was its last release and it will receive no further updates, see the [RAPIDS Support Notice 50](https://docs.rapids.ai/notices/rsn0050/) for details. Projects depending on UCX-Py are advised to migrate to [UCXX](https://github.com/rapidsai/ucxx) immediately. [UCXX documentation](https://docs.rapids.ai/api/ucxx/nightly/).
 
 [![https://ucx-py.readthedocs.io/en/latest/](https://readthedocs.org/projects/ucx-py/badge/ "ReadTheDocs")]( https://ucx-py.readthedocs.io/en/latest/ )
 
diff --git a/docs/source/conf.py b/docs/source/conf.py
index b32017cf..4c997ca4 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -1,3 +1,6 @@
+# Copyright (c) 2019-2025, NVIDIA CORPORATION. All rights reserved.
+# See file LICENSE for terms.
+#
 # -*- coding: utf-8 -*-
 #
 # Configuration file for the Sphinx documentation builder.
@@ -19,11 +22,8 @@
 
 # -- Project information -----------------------------------------------------
 
-# The full version, including alpha/beta/rc tags.
-from ucp import __version__ as release
-
 # The short X.Y version.
-version = ".".join(release.split(".")[:2])
+version = "0.45.0"
 
 project = "ucx-py"
 copyright = "2019-2021, NVIDIA"
diff --git a/docs/source/index.rst b/docs/source/index.rst
index e2d58b7b..d6c898ab 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -3,7 +3,7 @@ UCX-Py
 
 .. warning::
 
-    UCX-Py is deprecated, version 0.45 was its last release and it will receive no further updates. Users are advised to migrate to `UCXX <https://github.com/rapidsai/ucxx>`_ immediately. `UCXX documentation <https://docs.rapids.ai/api/ucxx/nightly/>`_.
+    UCX-Py has been discontinued, version 0.45 (RAPIDS 25.08) was its last release and it will receive no further updates, see the `RAPIDS Support Notice 50 <https://docs.rapids.ai/notices/rsn0050/>`_ for details. Projects depending on UCX-Py are advised to migrate to `UCXX <https://github.com/rapidsai/ucxx>`_ immediately. `UCXX documentation <https://docs.rapids.ai/api/ucxx/nightly/>`_.
 
 UCX-Py is the Python interface for `UCX <https://github.com/openucx/ucx>`_, a low-level high-performance networking library.  UCX and UCX-Py supports several transport methods including InfiniBand and NVLink while still using traditional networking protocols like TCP.
 
diff --git a/docs/source/install.rst b/docs/source/install.rst
index f4cb7b7a..d826c8a7 100644
--- a/docs/source/install.rst
+++ b/docs/source/install.rst
@@ -40,10 +40,6 @@ Change `cuda-version` to pin to a different CUDA minor version if you'd like.
 
 ::
 
-    # CUDA 13
-    conda create -n ucx -c conda-forge -c rapidsai \
-      cuda-version=13.0 ucx-py
-
     # CUDA 12
     conda create -n ucx -c conda-forge -c rapidsai \
       cuda-version=12.9 ucx-py
@@ -56,23 +52,19 @@ be done if desired (e.g., to test for new capabilities or bug fixes).
 PyPI
 ----
 
-PyPI installation is possible and currently supports CUDA versions
-``12`` and ``13``. Packages are compatible with CPU-only workloads and any one can
+PyPI installation is possible and currently supports CUDA version
+``12``. Packages are compatible with CPU-only workloads and any one can
 be chosen if the application doesn't use CUDA, but currently there are
 no pre-built CPU-only packages available, so the CUDA package must be
-installed instead. CUDA versions are differentiated by the suffix
-``-cuXY``, where ``XY`` must be replaced with the desired CUDA version.
+installed instead.
 
 ::
 
-    # CUDA 13
-    pip install ucx-py-cu13
-
     # CUDA 12
     pip install ucx-py-cu12
 
 UCX-Py has no direct dependency on CUDA, but the package specifies the
-``-cuXY`` prefix so that the correct ``libucx-cuXY`` package is selected.
+``-cu12`` prefix so that the correct ``libucx-cu12`` package is selected.
 This is also the reason why there are no CPU-only UCX-Py packages
 available at the moment, CPU-only builds of the UCX library are not
 currently available in PyPI.
@@ -109,17 +101,17 @@ Test Dependencies
         dask distributed cloudpickle
 
 
-UCX >= 1.17.0
+UCX >= 1.15.0
 ^^^^^^^^^^^^^
 
-Instructions for building UCX >= 1.17.0 (minimum version supported by UCX-Py), make sure to change ``git checkout v1.17.0`` to a newer version if desired:
+Instructions for building UCX >= 1.15.0 (minimum version supported by UCX-Py), make sure to change ``git checkout v1.15.0`` to a newer version if desired:
 
 ::
 
     conda activate ucx
     git clone https://github.com/openucx/ucx
     cd ucx
-    git checkout v1.17.0
+    git checkout v1.15.0
     ./autogen.sh
     mkdir build
     cd build
@@ -141,13 +133,13 @@ It is possible to enable InfiniBand support via the conda-forge rdma-core packag
     conda install -c conda-forge c-compiler cxx-compiler gcc_linux-64=11.* rdma-core=28.*
 
 
-After installing the necessary dependencies, it's now time to build UCX from source, make sure to change ``git checkout v1.17.0`` to a newer version if desired:
+After installing the necessary dependencies, it's now time to build UCX from source, make sure to change ``git checkout v1.15.0`` to a newer version if desired:
 
 ::
 
     git clone https://github.com/openucx/ucx
     cd ucx
-    git checkout v1.17.0
+    git checkout v1.15.0
     ./autogen.sh
     mkdir build
     cd build
@@ -217,7 +209,7 @@ Installing UCX-Py from source in a pip-only environment has additional limitatio
 UCX-Py with UCX from PyPI
 ^^^^^^^^^^^^^^^^^^^^^^^^^
 
-CUDA-enabled builds of the UCX libraries are available from PyPI, under the names ``libucx-cu12`` (CUDA 12) and ``libucx-cu13`` (CUDA 13).
+CUDA-enabled builds of the UCX libraries are available from PyPI, under the name ``libucx-cu12`` (CUDA 12).
 Notice that those builds do not currently include InfiniBand support, if InfiniBand is required you will
 need to provide a custom UCX install as described in the "UCX-Py with custom UCX install" section.
 
@@ -232,22 +224,19 @@ To build UCX-Py using those UCX packages (to avoid needing to build UCX from sou
     # or for develop build
     pip install -v -e .
 
-This will automatically handle installing appropriate, compatible ``libucx-cu{12,13}`` packages for build-time and runtime use.
-When you run UCX-Py code installed this way, it will load UCX libraries from the installed ``libucx-cu{12,13}`` package.
+This will automatically handle installing appropriate, compatible ``libucx-cu12`` packages for build-time and runtime use.
+When you run UCX-Py code installed this way, it will load UCX libraries from the installed ``libucx-cu12`` package.
 
 UCX-Py packages are built against the oldest version of UCX that UCX-Py supports, and can run against a range
 of ABI-compatible UCX versions.
 
 You can use packages from PyPI to customize the UCX version used at runtime.
-For example, to switch to using UCX 1.19 at runtime, run the following.
+For example, to switch to using UCX 1.18 at runtime, run the following.
 
 ::
 
-    # CUDA 13
-    pip install 'libucx-cu13>=1.19.0,<1.20'
-
     # CUDA 12
-    pip install 'libucx-cu12>=1.19.0,<1.20'
+    pip install 'libucx-cu12>=1.18.0,<1.19'
 
 
 UCX-Py with UCX system install
@@ -264,7 +253,7 @@ If a UCX system install is available, building and installing UCX-Py can be done
     # or for develop build
     pip install -v -e .
 
-To ensure that system install of UCX is always used at runtime (and not the ``libucx-cu{12,13}`` wheels), set the following
+To ensure that system install of UCX is always used at runtime (and not the ``libucx-cu12`` wheels), set the following
 environment variable in the runtime environment.
 
 ::