From 37c3020600cfe6755a7887240f9f4ccc429d3839 Mon Sep 17 00:00:00 2001
From: Anton Volkov <antonwolfy@gmail.com>
Date: Mon, 5 Oct 2026 22:51:29 +0200
Subject: [PATCH 1/4] Enable support of Python 3.15

Add Python 3.15 to the CI matrices and package metadata:
- pyproject.toml: add the 3.15 classifier and bump requires-python to <3.16
- conda-package(-cf): add 3.15 build/test rows (numpy 2.5), pinned to the
  GIL-enabled cp315 ABI like the existing 3.14 rows
- build_pip: add 3.15 rows with and without --pre
- clang smoke builds: add 3.15 and allow-prereleases in setup-python
- update the Python version lists in AGENTS.md files
---
 .github/workflows/build-with-clang.yml        |  4 +++-
 .../workflows/build-with-standard-clang.yml   |  4 +++-
 .github/workflows/build_pip.yml               |  6 ++++++
 .github/workflows/conda-package-cf.yml        | 20 +++++++++++++++++++
 .github/workflows/conda-package.yml           | 20 +++++++++++++++++++
 AGENTS.md                                     |  2 +-
 CHANGELOG.md                                  |  1 +
 conda-recipe/AGENTS.md                        |  2 +-
 mkl_umath/tests/AGENTS.md                     |  2 +-
 pyproject.toml                                |  3 ++-
 10 files changed, 58 insertions(+), 6 deletions(-)

diff --git a/.github/workflows/build-with-clang.yml b/.github/workflows/build-with-clang.yml
index 77bcdd3f..a5ac2fde 100644
--- a/.github/workflows/build-with-clang.yml
+++ b/.github/workflows/build-with-clang.yml
@@ -14,7 +14,7 @@ jobs:
 
     strategy:
       matrix:
-        python: ["3.10", "3.11", "3.12", "3.13", "3.14", "3.14t"]
+        python: ["3.10", "3.11", "3.12", "3.13", "3.14", "3.14t", "3.15"]
         numpy_version: ["'numpy>=2'"]
 
     env:
@@ -47,6 +47,8 @@ jobs:
         uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
         with:
           python-version: ${{ matrix.python }}
+          # allow the 3.15 release candidate until 3.15 is final
+          allow-prereleases: true
           architecture: x64
 
       - name: Checkout repo
diff --git a/.github/workflows/build-with-standard-clang.yml b/.github/workflows/build-with-standard-clang.yml
index fe77b903..860e88bd 100644
--- a/.github/workflows/build-with-standard-clang.yml
+++ b/.github/workflows/build-with-standard-clang.yml
@@ -14,7 +14,7 @@ jobs:
 
     strategy:
       matrix:
-        python: ["3.10", "3.11", "3.12", "3.13", "3.14", "3.14t"]
+        python: ["3.10", "3.11", "3.12", "3.13", "3.14", "3.14t", "3.15"]
         numpy_version: ["'numpy>=2'"]
 
     env:
@@ -38,6 +38,8 @@ jobs:
         uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
         with:
           python-version: ${{ matrix.python }}
+          # allow the 3.15 release candidate until 3.15 is final
+          allow-prereleases: true
           architecture: x64
 
       - name: Checkout repo
diff --git a/.github/workflows/build_pip.yml b/.github/workflows/build_pip.yml
index 1104584b..1fdd99ae 100644
--- a/.github/workflows/build_pip.yml
+++ b/.github/workflows/build_pip.yml
@@ -33,6 +33,12 @@ jobs:
           - python: "3.14"
             python_spec: "3.14.* *_cp314t"
             use_pre: "--pre"
+          - python: "3.15"
+            python_spec: "3.15.* *_cp315"
+            use_pre: ""
+          - python: "3.15"
+            python_spec: "3.15.* *_cp315"
+            use_pre: "--pre"
 
     steps:
       - name: Checkout repo
diff --git a/.github/workflows/conda-package-cf.yml b/.github/workflows/conda-package-cf.yml
index 52b680ef..04c68592 100644
--- a/.github/workflows/conda-package-cf.yml
+++ b/.github/workflows/conda-package-cf.yml
@@ -39,6 +39,10 @@ jobs:
             numpy: "2.3"
             python_spec: "3.14.* *_cp314t"
             python_tag: "3.14t"
+          - python: "3.15"
+            numpy: "2.5"
+            python_spec: "3.15.* *_cp315"
+            python_tag: "3.15"
     steps:
       - name: Cancel Previous Runs
         uses: styfle/cancel-workflow-action@d07a454dad7609a92316b57b23c9ccfd4f59af66 # 0.13.1
@@ -125,6 +129,12 @@ jobs:
             numpy: 'numpy">=2"'
             experimental: false
             runner: ubuntu-latest
+          - python: "3.15"
+            python_spec: "3.15.* *_cp315"
+            python_tag: "3.15"
+            numpy: 'numpy">=2"'
+            experimental: false
+            runner: ubuntu-latest
     continue-on-error: ${{ matrix.experimental }}
     env:
       CHANNELS: -c conda-forge --override-channels
@@ -225,6 +235,10 @@ jobs:
             numpy: "2.3"
             python_spec: "3.14.* *_cp314t"
             python_tag: "3.14t"
+          - python: "3.15"
+            numpy: "2.5"
+            python_spec: "3.15.* *_cp315"
+            python_tag: "3.15"
     env:
       conda-bld: C:\Miniconda\conda-bld\win-64\
     steps:
@@ -305,6 +319,12 @@ jobs:
             numpy: 'numpy">=2"'
             experimental: false
             runner: windows-latest
+          - python: "3.15"
+            python_spec: "3.15.* *_cp315"
+            python_tag: "3.15"
+            numpy: 'numpy">=2"'
+            experimental: false
+            runner: windows-latest
     continue-on-error: ${{ matrix.experimental }}
     env:
       workdir: '${{ github.workspace }}'
diff --git a/.github/workflows/conda-package.yml b/.github/workflows/conda-package.yml
index e0d85a1e..39152e91 100644
--- a/.github/workflows/conda-package.yml
+++ b/.github/workflows/conda-package.yml
@@ -39,6 +39,10 @@ jobs:
             numpy: "2.3"
             python_spec: "3.14.* *_cp314t"
             python_tag: "3.14t"
+          - python: "3.15"
+            numpy: "2.5"
+            python_spec: "3.15.* *_cp315"
+            python_tag: "3.15"
     steps:
       - name: Cancel Previous Runs
         uses: styfle/cancel-workflow-action@d07a454dad7609a92316b57b23c9ccfd4f59af66 # 0.13.1
@@ -135,6 +139,12 @@ jobs:
             numpy: 'numpy">=2"'
             experimental: false
             runner: ubuntu-latest
+          - python: "3.15"
+            python_spec: "3.15.* *_cp315"
+            python_tag: "3.15"
+            numpy: 'numpy">=2"'
+            experimental: false
+            runner: ubuntu-latest
     continue-on-error: ${{ matrix.experimental }}
     env:
       CHANNELS: -c https://software.repos.intel.com/python/conda -c conda-forge --override-channels
@@ -235,6 +245,10 @@ jobs:
             numpy: "2.3"
             python_spec: "3.14.* *_cp314t"
             python_tag: "3.14t"
+          - python: "3.15"
+            numpy: "2.5"
+            python_spec: "3.15.* *_cp315"
+            python_tag: "3.15"
     env:
       conda-bld: C:\Miniconda\conda-bld\win-64\
     steps:
@@ -322,6 +336,12 @@ jobs:
             numpy: 'numpy">=2"'
             experimental: false
             runner: windows-latest
+          - python: "3.15"
+            python_spec: "3.15.* *_cp315"
+            python_tag: "3.15"
+            numpy: 'numpy">=2"'
+            experimental: false
+            runner: windows-latest
     continue-on-error: ${{ matrix.experimental }}
     env:
       workdir: '${{ github.workspace }}'
diff --git a/AGENTS.md b/AGENTS.md
index 01525618..840cac24 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -41,7 +41,7 @@ CC=icx pip install --no-deps --no-build-isolation .  # clang is also supported i
 
 ## CI/CD
 - **Platforms:** Linux, Windows
-- **Python versions:** 3.10, 3.11, 3.12, 3.13, 3.14
+- **Python versions:** 3.10, 3.11, 3.12, 3.13, 3.14, 3.15
 - **Workflows:** `.github/workflows/`
   - `conda-package.yml` — main conda build/test pipeline
   - `conda-package-cf.yml` — conda-forge-oriented build/test pipeline
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 14f0aa29..f0da8acf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [dev] - YYYY-MM-DD
 
 ### Added
+* Enabled support of Python 3.15 [gh-279](https://github.com/IntelPython/mkl_umath/pull/279)
 * Added support for free-threaded (GIL-disabled) CPython builds: the Cython extension is compiled with `freethreading_compatible=True` and `_ufuncs` declares `Py_MOD_GIL_NOT_USED`, so importing `mkl_umath` no longer re-enables the GIL [gh-255](https://github.com/IntelPython/mkl_umath/pull/255)
 
 ### Changed
diff --git a/conda-recipe/AGENTS.md b/conda-recipe/AGENTS.md
index 08182026..c5bd2f93 100644
--- a/conda-recipe/AGENTS.md
+++ b/conda-recipe/AGENTS.md
@@ -11,7 +11,7 @@ Conda package build recipe for Intel channel distribution.
 
 ## Build configuration
 - **Channels:** `https://software.repos.intel.com/python/conda`, `conda-forge`
-- **Python versions:** 3.10, 3.11, 3.12, 3.13, 3.14
+- **Python versions:** 3.10, 3.11, 3.12, 3.13, 3.14, 3.15
 - **Build system:** meson-python (via `python -m build`)
 - **Compilers:** Intel C compiler (icx)
 - **Dependencies:** mkl-devel, intel-openmp, dpcpp_{linux,win}-64, numpy
diff --git a/mkl_umath/tests/AGENTS.md b/mkl_umath/tests/AGENTS.md
index abc3d058..a9f4d5c9 100644
--- a/mkl_umath/tests/AGENTS.md
+++ b/mkl_umath/tests/AGENTS.md
@@ -20,7 +20,7 @@ pytest mkl_umath/tests/
 
 ## CI integration
 - Tests run in conda-package.yml workflow
-- Separate test jobs per Python version (3.10-3.14)
+- Separate test jobs per Python version (3.10-3.15)
 - Linux + Windows platforms
 
 ## Adding tests
diff --git a/pyproject.toml b/pyproject.toml
index 13f65fb4..64a913ae 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -50,6 +50,7 @@ classifiers = [
   "Programming Language :: Python :: 3.12",
   "Programming Language :: Python :: 3.13",
   "Programming Language :: Python :: 3.14",
+  "Programming Language :: Python :: 3.15",
   "Programming Language :: Python :: Free Threading :: 2 - Beta",
   "Programming Language :: Python :: Implementation :: CPython",
   "Topic :: Software Development",
@@ -65,7 +66,7 @@ keywords = ["mkl_umath"]
 license = "BSD-3-Clause"
 name = "mkl_umath"
 readme = { file = "README.md", content-type = "text/markdown" }
-requires-python = ">=3.10,<3.15"
+requires-python = ">=3.10,<3.16"
 
 [project.optional-dependencies]
 test = ["pytest"]

From cdeff83c19b750c740d480fe65ae77e432cc94a4 Mon Sep 17 00:00:00 2001
From: Anton Volkov <antonwolfy@gmail.com>
Date: Tue, 6 Oct 2026 12:26:07 +0200
Subject: [PATCH 2/4] Add python_rc channel for the Python 3.15 release
 candidate

conda-forge's Python 3.15 RC builds depend on the _python_rc marker
package, which is only published in conda-forge/label/python_rc. Add
that channel to every conda build/test step and setup-miniconda
'channels' input that resolves Python 3.15; setup-miniconda creates
its environment using only its own 'channels' input, so the channel
added to the later conda build/CHANNELS steps is not enough.
---
 .github/workflows/build_pip.yml        |  3 ++-
 .github/workflows/conda-package-cf.yml | 18 ++++++++++--------
 .github/workflows/conda-package.yml    | 18 ++++++++++--------
 3 files changed, 22 insertions(+), 17 deletions(-)

diff --git a/.github/workflows/build_pip.yml b/.github/workflows/build_pip.yml
index 1fdd99ae..f6566977 100644
--- a/.github/workflows/build_pip.yml
+++ b/.github/workflows/build_pip.yml
@@ -51,7 +51,8 @@ jobs:
         with:
           use-mamba: true
           miniforge-version: latest
-          channels: https://software.repos.intel.com/python/conda, conda-forge
+          # conda-forge/label/python_rc carries the 3.15 release candidate
+          channels: https://software.repos.intel.com/python/conda, conda-forge, conda-forge/label/python_rc
           conda-remove-defaults: true
           activate-environment: test
           python-version: ${{ matrix.python }}
diff --git a/.github/workflows/conda-package-cf.yml b/.github/workflows/conda-package-cf.yml
index 04c68592..fe4a4eae 100644
--- a/.github/workflows/conda-package-cf.yml
+++ b/.github/workflows/conda-package-cf.yml
@@ -89,7 +89,7 @@ jobs:
 
       - name: Build conda package
         run: |
-          CHANNELS=(-c "conda-forge" --override-channels)
+          CHANNELS=(-c "conda-forge" -c "conda-forge/label/python_rc" --override-channels)
           VERSIONS=(--python "${{ matrix.python_spec || matrix.python }}" --numpy "${{ matrix.numpy }}")
           TEST=(--no-test)
           echo "CONDA_BLD=${CONDA}/conda-bld/linux-64" >> "$GITHUB_ENV"
@@ -137,7 +137,7 @@ jobs:
             runner: ubuntu-latest
     continue-on-error: ${{ matrix.experimental }}
     env:
-      CHANNELS: -c conda-forge --override-channels
+      CHANNELS: -c conda-forge -c conda-forge/label/python_rc --override-channels
 
     steps:
       - name: Download artifact
@@ -171,7 +171,7 @@ jobs:
           cat "$GITHUB_WORKSPACE"/ver.json
       - name: Collect dependencies
         run: |
-          CHANNELS=(-c "$GITHUB_WORKSPACE/channel" -c "conda-forge" --override-channels)
+          CHANNELS=(-c "$GITHUB_WORKSPACE/channel" -c "conda-forge" -c "conda-forge/label/python_rc" --override-channels)
           PACKAGE_VERSION="$(python -c "${VER_SCRIPT1} ${VER_SCRIPT2}")"
           conda create -n "${{ env.TEST_ENV_NAME }}" "${PACKAGE_NAME}=${PACKAGE_VERSION}" "python=${{ matrix.python_spec || matrix.python }}" ${{ matrix.numpy }} "${CHANNELS[@]}" --only-deps --dry-run > lockfile
       - name: Display lockfile
@@ -195,7 +195,7 @@ jobs:
 
       - name: Install mkl_umath
         run: |
-          CHANNELS=(-c "$GITHUB_WORKSPACE/channel" -c "conda-forge" --override-channels)
+          CHANNELS=(-c "$GITHUB_WORKSPACE/channel" -c "conda-forge" -c "conda-forge/label/python_rc" --override-channels)
           PACKAGE_VERSION="$(python -c "${VER_SCRIPT1} ${VER_SCRIPT2}")"
           conda create -n "${{ env.TEST_ENV_NAME }}" "python=${{ matrix.python_spec || matrix.python }}" ${{ matrix.numpy }} "$PACKAGE_NAME=${PACKAGE_VERSION}" pytest "${CHANNELS[@]}"
           # Test installed packages
@@ -256,7 +256,8 @@ jobs:
           auto-update-conda: true
           miniforge-version: latest
           activate-environment: build
-          channels: conda-forge
+          # conda-forge/label/python_rc carries the 3.15 release candidate
+          channels: conda-forge,conda-forge/label/python_rc
           python-version: ${{ matrix.python }}
           conda-build-version: ${{ env.CONDA_BUILD_VERSION }}
 
@@ -286,7 +287,7 @@ jobs:
       - name: Build conda package
         run: |
           conda activate
-          conda build --no-test --python "${{ matrix.python_spec || matrix.python }}" --numpy ${{ matrix.numpy }} -c conda-forge --override-channels conda-recipe-cf
+          conda build --no-test --python "${{ matrix.python_spec || matrix.python }}" --numpy ${{ matrix.numpy }} -c conda-forge -c conda-forge/label/python_rc --override-channels conda-recipe-cf
 
       - name: Upload artifact
         uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
@@ -328,7 +329,7 @@ jobs:
     continue-on-error: ${{ matrix.experimental }}
     env:
       workdir: '${{ github.workspace }}'
-      CHANNELS: -c conda-forge --override-channels
+      CHANNELS: -c conda-forge -c conda-forge/label/python_rc --override-channels
 
     steps:
       - name: Download artifact
@@ -341,7 +342,8 @@ jobs:
           auto-update-conda: true
           miniforge-version: latest
           activate-environment: ${{ env.TEST_ENV_NAME }}
-          channels: conda-forge
+          # conda-forge/label/python_rc carries the 3.15 release candidate
+          channels: conda-forge,conda-forge/label/python_rc
           conda-remove-defaults: "true"
           python-version: ${{ matrix.python }}
 
diff --git a/.github/workflows/conda-package.yml b/.github/workflows/conda-package.yml
index 39152e91..d87c5685 100644
--- a/.github/workflows/conda-package.yml
+++ b/.github/workflows/conda-package.yml
@@ -94,7 +94,7 @@ jobs:
 
       - name: Build conda package
         run: |
-          CHANNELS=(-c "https://software.repos.intel.com/python/conda" -c "conda-forge" --override-channels)
+          CHANNELS=(-c "https://software.repos.intel.com/python/conda" -c "conda-forge" -c "conda-forge/label/python_rc" --override-channels)
           VERSIONS=(--python "${{ matrix.python_spec || matrix.python }}" --numpy "${{ matrix.numpy }}")
           TEST=(--no-test)
 
@@ -147,7 +147,7 @@ jobs:
             runner: ubuntu-latest
     continue-on-error: ${{ matrix.experimental }}
     env:
-      CHANNELS: -c https://software.repos.intel.com/python/conda -c conda-forge --override-channels
+      CHANNELS: -c https://software.repos.intel.com/python/conda -c conda-forge -c conda-forge/label/python_rc --override-channels
 
     steps:
       - name: Download artifact
@@ -181,7 +181,7 @@ jobs:
           cat "$GITHUB_WORKSPACE"/ver.json
       - name: Collect dependencies
         run: |
-          CHANNELS=(-c "$GITHUB_WORKSPACE/channel" -c "https://software.repos.intel.com/python/conda" -c "conda-forge" --override-channels)
+          CHANNELS=(-c "$GITHUB_WORKSPACE/channel" -c "https://software.repos.intel.com/python/conda" -c "conda-forge" -c "conda-forge/label/python_rc" --override-channels)
           PACKAGE_VERSION="$(python -c "${VER_SCRIPT1} ${VER_SCRIPT2}")"
           conda create -n "${{ env.TEST_ENV_NAME }}" "${PACKAGE_NAME}=${PACKAGE_VERSION}" "python=${{ matrix.python_spec || matrix.python }}" ${{ matrix.numpy }} "${CHANNELS[@]}" --only-deps --dry-run > lockfile
       - name: Display lockfile
@@ -205,7 +205,7 @@ jobs:
 
       - name: Install mkl_umath
         run: |
-          CHANNELS=(-c "$GITHUB_WORKSPACE/channel" -c "https://software.repos.intel.com/python/conda" -c "conda-forge" --override-channels)
+          CHANNELS=(-c "$GITHUB_WORKSPACE/channel" -c "https://software.repos.intel.com/python/conda" -c "conda-forge" -c "conda-forge/label/python_rc" --override-channels)
           PACKAGE_VERSION="$(python -c "${VER_SCRIPT1} ${VER_SCRIPT2}")"
           conda create -n "${{ env.TEST_ENV_NAME }}" "python=${{ matrix.python_spec || matrix.python }}" ${{ matrix.numpy }} "$PACKAGE_NAME=${PACKAGE_VERSION}" pytest "${CHANNELS[@]}"
           # Test installed packages
@@ -266,7 +266,8 @@ jobs:
           auto-update-conda: true
           miniforge-version: latest
           activate-environment: build
-          channels: conda-forge
+          # conda-forge/label/python_rc carries the 3.15 release candidate
+          channels: conda-forge,conda-forge/label/python_rc
           python-version: ${{ matrix.python }}
           conda-build-version: ${{ env.CONDA_BUILD_VERSION }}
 
@@ -297,7 +298,7 @@ jobs:
       - name: Build conda package
         run: |
           conda activate
-          conda build --no-test --python "${{ matrix.python_spec || matrix.python }}" --numpy ${{ matrix.numpy }} -c https://software.repos.intel.com/python/conda -c conda-forge --override-channels conda-recipe
+          conda build --no-test --python "${{ matrix.python_spec || matrix.python }}" --numpy ${{ matrix.numpy }} -c https://software.repos.intel.com/python/conda -c conda-forge -c conda-forge/label/python_rc --override-channels conda-recipe
 
       - name: Upload artifact
         uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
@@ -345,7 +346,7 @@ jobs:
     continue-on-error: ${{ matrix.experimental }}
     env:
       workdir: '${{ github.workspace }}'
-      CHANNELS: -c https://software.repos.intel.com/python/conda -c conda-forge --override-channels
+      CHANNELS: -c https://software.repos.intel.com/python/conda -c conda-forge -c conda-forge/label/python_rc --override-channels
 
     steps:
       - name: Download artifact
@@ -358,7 +359,8 @@ jobs:
           auto-update-conda: true
           miniforge-version: latest
           activate-environment: ${{ env.TEST_ENV_NAME }}
-          channels: conda-forge
+          # conda-forge/label/python_rc carries the 3.15 release candidate
+          channels: conda-forge,conda-forge/label/python_rc
           conda-remove-defaults: "true"
           python-version: ${{ matrix.python }}
 

From 569e9e13a05d4a60a3e399da56399d9d556bdc0e Mon Sep 17 00:00:00 2001
From: Anton Volkov <antonwolfy@gmail.com>
Date: Tue, 13 Oct 2026 18:49:36 +0200
Subject: [PATCH 3/4] Drop release-candidate workarounds now that Python 3.15
 is final

Python 3.15.0 is released and available from both setup-python and the
main conda-forge channel, so the conda-forge/label/python_rc channel and
allow-prereleases in setup-python are no longer needed.
---
 .github/workflows/build_pip.yml        |  3 +--
 .github/workflows/conda-package-cf.yml | 18 ++++++++----------
 .github/workflows/conda-package.yml    | 18 ++++++++----------
 3 files changed, 17 insertions(+), 22 deletions(-)

diff --git a/.github/workflows/build_pip.yml b/.github/workflows/build_pip.yml
index f6566977..1fdd99ae 100644
--- a/.github/workflows/build_pip.yml
+++ b/.github/workflows/build_pip.yml
@@ -51,8 +51,7 @@ jobs:
         with:
           use-mamba: true
           miniforge-version: latest
-          # conda-forge/label/python_rc carries the 3.15 release candidate
-          channels: https://software.repos.intel.com/python/conda, conda-forge, conda-forge/label/python_rc
+          channels: https://software.repos.intel.com/python/conda, conda-forge
           conda-remove-defaults: true
           activate-environment: test
           python-version: ${{ matrix.python }}
diff --git a/.github/workflows/conda-package-cf.yml b/.github/workflows/conda-package-cf.yml
index fe4a4eae..04c68592 100644
--- a/.github/workflows/conda-package-cf.yml
+++ b/.github/workflows/conda-package-cf.yml
@@ -89,7 +89,7 @@ jobs:
 
       - name: Build conda package
         run: |
-          CHANNELS=(-c "conda-forge" -c "conda-forge/label/python_rc" --override-channels)
+          CHANNELS=(-c "conda-forge" --override-channels)
           VERSIONS=(--python "${{ matrix.python_spec || matrix.python }}" --numpy "${{ matrix.numpy }}")
           TEST=(--no-test)
           echo "CONDA_BLD=${CONDA}/conda-bld/linux-64" >> "$GITHUB_ENV"
@@ -137,7 +137,7 @@ jobs:
             runner: ubuntu-latest
     continue-on-error: ${{ matrix.experimental }}
     env:
-      CHANNELS: -c conda-forge -c conda-forge/label/python_rc --override-channels
+      CHANNELS: -c conda-forge --override-channels
 
     steps:
       - name: Download artifact
@@ -171,7 +171,7 @@ jobs:
           cat "$GITHUB_WORKSPACE"/ver.json
       - name: Collect dependencies
         run: |
-          CHANNELS=(-c "$GITHUB_WORKSPACE/channel" -c "conda-forge" -c "conda-forge/label/python_rc" --override-channels)
+          CHANNELS=(-c "$GITHUB_WORKSPACE/channel" -c "conda-forge" --override-channels)
           PACKAGE_VERSION="$(python -c "${VER_SCRIPT1} ${VER_SCRIPT2}")"
           conda create -n "${{ env.TEST_ENV_NAME }}" "${PACKAGE_NAME}=${PACKAGE_VERSION}" "python=${{ matrix.python_spec || matrix.python }}" ${{ matrix.numpy }} "${CHANNELS[@]}" --only-deps --dry-run > lockfile
       - name: Display lockfile
@@ -195,7 +195,7 @@ jobs:
 
       - name: Install mkl_umath
         run: |
-          CHANNELS=(-c "$GITHUB_WORKSPACE/channel" -c "conda-forge" -c "conda-forge/label/python_rc" --override-channels)
+          CHANNELS=(-c "$GITHUB_WORKSPACE/channel" -c "conda-forge" --override-channels)
           PACKAGE_VERSION="$(python -c "${VER_SCRIPT1} ${VER_SCRIPT2}")"
           conda create -n "${{ env.TEST_ENV_NAME }}" "python=${{ matrix.python_spec || matrix.python }}" ${{ matrix.numpy }} "$PACKAGE_NAME=${PACKAGE_VERSION}" pytest "${CHANNELS[@]}"
           # Test installed packages
@@ -256,8 +256,7 @@ jobs:
           auto-update-conda: true
           miniforge-version: latest
           activate-environment: build
-          # conda-forge/label/python_rc carries the 3.15 release candidate
-          channels: conda-forge,conda-forge/label/python_rc
+          channels: conda-forge
           python-version: ${{ matrix.python }}
           conda-build-version: ${{ env.CONDA_BUILD_VERSION }}
 
@@ -287,7 +286,7 @@ jobs:
       - name: Build conda package
         run: |
           conda activate
-          conda build --no-test --python "${{ matrix.python_spec || matrix.python }}" --numpy ${{ matrix.numpy }} -c conda-forge -c conda-forge/label/python_rc --override-channels conda-recipe-cf
+          conda build --no-test --python "${{ matrix.python_spec || matrix.python }}" --numpy ${{ matrix.numpy }} -c conda-forge --override-channels conda-recipe-cf
 
       - name: Upload artifact
         uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
@@ -329,7 +328,7 @@ jobs:
     continue-on-error: ${{ matrix.experimental }}
     env:
       workdir: '${{ github.workspace }}'
-      CHANNELS: -c conda-forge -c conda-forge/label/python_rc --override-channels
+      CHANNELS: -c conda-forge --override-channels
 
     steps:
       - name: Download artifact
@@ -342,8 +341,7 @@ jobs:
           auto-update-conda: true
           miniforge-version: latest
           activate-environment: ${{ env.TEST_ENV_NAME }}
-          # conda-forge/label/python_rc carries the 3.15 release candidate
-          channels: conda-forge,conda-forge/label/python_rc
+          channels: conda-forge
           conda-remove-defaults: "true"
           python-version: ${{ matrix.python }}
 
diff --git a/.github/workflows/conda-package.yml b/.github/workflows/conda-package.yml
index d87c5685..39152e91 100644
--- a/.github/workflows/conda-package.yml
+++ b/.github/workflows/conda-package.yml
@@ -94,7 +94,7 @@ jobs:
 
       - name: Build conda package
         run: |
-          CHANNELS=(-c "https://software.repos.intel.com/python/conda" -c "conda-forge" -c "conda-forge/label/python_rc" --override-channels)
+          CHANNELS=(-c "https://software.repos.intel.com/python/conda" -c "conda-forge" --override-channels)
           VERSIONS=(--python "${{ matrix.python_spec || matrix.python }}" --numpy "${{ matrix.numpy }}")
           TEST=(--no-test)
 
@@ -147,7 +147,7 @@ jobs:
             runner: ubuntu-latest
     continue-on-error: ${{ matrix.experimental }}
     env:
-      CHANNELS: -c https://software.repos.intel.com/python/conda -c conda-forge -c conda-forge/label/python_rc --override-channels
+      CHANNELS: -c https://software.repos.intel.com/python/conda -c conda-forge --override-channels
 
     steps:
       - name: Download artifact
@@ -181,7 +181,7 @@ jobs:
           cat "$GITHUB_WORKSPACE"/ver.json
       - name: Collect dependencies
         run: |
-          CHANNELS=(-c "$GITHUB_WORKSPACE/channel" -c "https://software.repos.intel.com/python/conda" -c "conda-forge" -c "conda-forge/label/python_rc" --override-channels)
+          CHANNELS=(-c "$GITHUB_WORKSPACE/channel" -c "https://software.repos.intel.com/python/conda" -c "conda-forge" --override-channels)
           PACKAGE_VERSION="$(python -c "${VER_SCRIPT1} ${VER_SCRIPT2}")"
           conda create -n "${{ env.TEST_ENV_NAME }}" "${PACKAGE_NAME}=${PACKAGE_VERSION}" "python=${{ matrix.python_spec || matrix.python }}" ${{ matrix.numpy }} "${CHANNELS[@]}" --only-deps --dry-run > lockfile
       - name: Display lockfile
@@ -205,7 +205,7 @@ jobs:
 
       - name: Install mkl_umath
         run: |
-          CHANNELS=(-c "$GITHUB_WORKSPACE/channel" -c "https://software.repos.intel.com/python/conda" -c "conda-forge" -c "conda-forge/label/python_rc" --override-channels)
+          CHANNELS=(-c "$GITHUB_WORKSPACE/channel" -c "https://software.repos.intel.com/python/conda" -c "conda-forge" --override-channels)
           PACKAGE_VERSION="$(python -c "${VER_SCRIPT1} ${VER_SCRIPT2}")"
           conda create -n "${{ env.TEST_ENV_NAME }}" "python=${{ matrix.python_spec || matrix.python }}" ${{ matrix.numpy }} "$PACKAGE_NAME=${PACKAGE_VERSION}" pytest "${CHANNELS[@]}"
           # Test installed packages
@@ -266,8 +266,7 @@ jobs:
           auto-update-conda: true
           miniforge-version: latest
           activate-environment: build
-          # conda-forge/label/python_rc carries the 3.15 release candidate
-          channels: conda-forge,conda-forge/label/python_rc
+          channels: conda-forge
           python-version: ${{ matrix.python }}
           conda-build-version: ${{ env.CONDA_BUILD_VERSION }}
 
@@ -298,7 +297,7 @@ jobs:
       - name: Build conda package
         run: |
           conda activate
-          conda build --no-test --python "${{ matrix.python_spec || matrix.python }}" --numpy ${{ matrix.numpy }} -c https://software.repos.intel.com/python/conda -c conda-forge -c conda-forge/label/python_rc --override-channels conda-recipe
+          conda build --no-test --python "${{ matrix.python_spec || matrix.python }}" --numpy ${{ matrix.numpy }} -c https://software.repos.intel.com/python/conda -c conda-forge --override-channels conda-recipe
 
       - name: Upload artifact
         uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
@@ -346,7 +345,7 @@ jobs:
     continue-on-error: ${{ matrix.experimental }}
     env:
       workdir: '${{ github.workspace }}'
-      CHANNELS: -c https://software.repos.intel.com/python/conda -c conda-forge -c conda-forge/label/python_rc --override-channels
+      CHANNELS: -c https://software.repos.intel.com/python/conda -c conda-forge --override-channels
 
     steps:
       - name: Download artifact
@@ -359,8 +358,7 @@ jobs:
           auto-update-conda: true
           miniforge-version: latest
           activate-environment: ${{ env.TEST_ENV_NAME }}
-          # conda-forge/label/python_rc carries the 3.15 release candidate
-          channels: conda-forge,conda-forge/label/python_rc
+          channels: conda-forge
           conda-remove-defaults: "true"
           python-version: ${{ matrix.python }}
 

From 7939a4234d285971d9d630a6d3a7e1af55abb170 Mon Sep 17 00:00:00 2001
From: Anton Volkov <antonwolfy@gmail.com>
Date: Tue, 13 Oct 2026 18:49:55 +0200
Subject: [PATCH 4/4] Drop allow-prereleases from the clang workflows now that
 Python 3.15 is final

---
 .github/workflows/build-with-clang.yml          | 2 --
 .github/workflows/build-with-standard-clang.yml | 2 --
 2 files changed, 4 deletions(-)

diff --git a/.github/workflows/build-with-clang.yml b/.github/workflows/build-with-clang.yml
index a5ac2fde..7bec94af 100644
--- a/.github/workflows/build-with-clang.yml
+++ b/.github/workflows/build-with-clang.yml
@@ -47,8 +47,6 @@ jobs:
         uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
         with:
           python-version: ${{ matrix.python }}
-          # allow the 3.15 release candidate until 3.15 is final
-          allow-prereleases: true
           architecture: x64
 
       - name: Checkout repo
diff --git a/.github/workflows/build-with-standard-clang.yml b/.github/workflows/build-with-standard-clang.yml
index 860e88bd..853cf627 100644
--- a/.github/workflows/build-with-standard-clang.yml
+++ b/.github/workflows/build-with-standard-clang.yml
@@ -38,8 +38,6 @@ jobs:
         uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
         with:
           python-version: ${{ matrix.python }}
-          # allow the 3.15 release candidate until 3.15 is final
-          allow-prereleases: true
           architecture: x64
 
       - name: Checkout repo