matplotlib · QuLogic · Feb 25, 2026 · Mar 6, 2026 · Mar 6, 2026 · Mar 6, 2026
diff --git a/.circleci/config.yml b/.circleci/config.yml
@@ -103,10 +103,10 @@ commands:
       - run:
           name: Install Python dependencies
           command: |
-            python -m pip install --user -r requirements/dev/build-requirements.txt
+            python -m pip install --user --group build
             python -m pip install --user \
                 numpy<< parameters.numpy_version >> \
-                -r requirements/doc/doc-requirements.txt
+                --group doc
             python -m pip install --no-deps --user \
                 git+https://github.com/matplotlib/mpl-sphinx-theme.git
 

diff --git a/.github/dependabot.yml b/.github/dependabot.yml
@@ -9,3 +9,9 @@ updates:
       actions:
         patterns:
           - "*"
+  - package-ecosystem: "pip"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    exclude-paths:
+      - "ci/minver-requirements.txt"
diff --git a/.github/labeler.yml b/.github/labeler.yml
@@ -1,7 +1,9 @@
 ---
 "CI: Run cibuildwheel":
   - changed-files:
-      - any-glob-to-any-file: ['.github/workflows/cibuildwheel.yml']
+      - any-glob-to-any-file:
+          - '.github/workflows/cibuildwheel.yml'
+          - '.github/workflows/wasm.yml'
 "CI: Run cygwin":
   - changed-files:
       - any-glob-to-any-file: ['.github/workflows/cygwin.yml']

diff --git a/.github/workflows/autoclose_comment.yml b/.github/workflows/autoclose_comment.yml
@@ -0,0 +1,80 @@
+---
+name: autoclose comment
+# Post comment on PRs when labeled with "status: autoclose candidate".
+# Based on scikit-learn's autoclose bot at
+# https://github.com/scikit-learn/scikit-learn/blob/main/.github/workflows/autoclose-comment.yml
+
+permissions:
+  contents: read
+  pull-requests: write
+
+on:
+  pull_request_target:
+    types:
+      - labeled
+
+env:
+  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+  GH_REPO: ${{ github.repository }}
+  PULL_REQUEST_NUMBER: ${{ github.event.pull_request.number }}
+
+jobs:
+  post_comment:
+    name: post_comment
+    if: "${{ contains(github.event.label.name, 'status: autoclose candidate') }}"
+    runs-on: ubuntu-latest
+
+    steps:
+
+      - name: comment on potential autoclose
+        run: |
+          gh api \
+          --method POST \
+          -H "Accept: application/vnd.github+json" \
+          -H "X-GitHub-Api-Version: 2022-11-28" \
+          /repos/$GH_REPO/issues/$PULL_REQUEST_NUMBER/comments \
+          -f "body=$BODY"
+        env:
+          BODY: >
+            ⏰ This pull request might be automatically closed in two weeks from now.
+
+
+            Thank you for your contribution to Matplotlib and for the effort you
+            have put into this PR. This pull request does not yet meet the
+            quality and clarity standards needed for an effective review.
+            Project maintainers have limited time for code reviews, and our goal
+            is to prioritize well-prepared contributions to keep Matplotlib
+            maintainable.
+
+
+            Matplotlib maintainers cannot provide one-to-one guidance on this PR.
+            However, if you ask focused, well-researched questions, a community
+            member may be willing to help. 💬
+
+
+            To increase the chance of a productive review:
+
+            - Use [the template provided in the PR
+            description](https://github.com/matplotlib/matplotlib/blob/main/.github/PULL_REQUEST_TEMPLATE.md)
+            and fill it out as completely as possible, especially the summary and AI Disclosure sections.
+
+            - Make sure your PR conforms to our [PR
+            checklist](https://matplotlib.org/devdocs/devel/pr_guide.html#summary-for-pull-request-authors).
+
+
+            As the author, you are responsible for driving this PR, which entails doing
+            necessary background research as well as presenting its context and your
+            thought process. If you are a new contributor, or do not know how to
+            fulfill these requirements, we recommend that you familiarize
+            yourself with Matplotlib's
+            [development conventions](https://matplotlib.org/devdocs/devel/index.html)
+            or engage with the community via our [Discourse](https://discourse.matplotlib.org/)
+            or one of our [meetings](https://scientific-python.org/calendars/)
+            before submitting code.
+
+
+            If you substantially improve this PR within two weeks, leave a comment
+            and a team member may remove the `status: autoclose candidate` label and the
+            PR stays open. Cosmetic changes or incomplete fixes will not be
+            sufficient. Maintainers will assess improvements on their own
+            schedule. Please do not ping (`@`) maintainers.
diff --git a/.github/workflows/autoclose_schedule.yml b/.github/workflows/autoclose_schedule.yml
@@ -0,0 +1,37 @@
+---
+name: autoclose schedule
+# Autoclose PRs labeled with "status: autoclose candidate" after 2 weeks.
+# Based on scikit-learn's implementation at
+# https://github.com/scikit-learn/scikit-learn/blob/main/.github/workflows/autoclose-schedule.yml
+
+permissions:
+  contents: read
+  pull-requests: write
+
+on:
+  schedule:
+    - cron: '0 2 * * *'  # runs daily at 02:00 UTC
+  workflow_dispatch:
+
+env:
+  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+jobs:
+
+  autoclose:
+    name: autoclose labeled PRs
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2
+      - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405  # v6.2.0
+        with:
+          python-version: '3.13'
+      - name: Install PyGithub
+        run: pip install -Uq PyGithub
+
+      - name: Checkout repository
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2
+
+      - name: Close PRs labeled more than 14 days ago
+        run: |
+          python tools/autoclose_prs.py
diff --git a/.github/workflows/cibuildwheel.yml b/.github/workflows/cibuildwheel.yml
@@ -140,7 +140,7 @@ jobs:
 
     steps:
       - name: Download sdist
-        uses: actions/download-artifact@70fc10c6e5e1ce46ad2ea6f2b72d43f7d47b13c3  # v8.0.0
+        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c  # v8.0.1
         with:
           name: cibw-sdist
           path: dist/

diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
@@ -34,7 +34,7 @@ jobs:
           persist-credentials: false
 
       - name: Initialize CodeQL
-        uses: github/codeql-action/init@0d579ffd059c29b07949a3cce3983f0780820c98  # v4.32.6
+        uses: github/codeql-action/init@38697555549f1db7851b81482ff19f1fa5c4fedc  # v4.34.1
         with:
           languages: ${{ matrix.language }}
 
@@ -45,4 +45,4 @@ jobs:
           pip install --user -v .
 
       - name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@0d579ffd059c29b07949a3cce3983f0780820c98  # v4.32.6
+        uses: github/codeql-action/analyze@38697555549f1db7851b81482ff19f1fa5c4fedc  # v4.34.1
diff --git a/.github/workflows/cygwin.yml b/.github/workflows/cygwin.yml
@@ -141,21 +141,21 @@ jobs:
         # FreeType build fails with bash, succeeds with dash
 
       - name: Cache pip
-        uses: actions/cache@cdf6c1fa76f9f475f3d7449005a359c84ca0f306  # v5.0.3
+        uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7  # v5.0.4
         with:
           path: C:\cygwin\home\runneradmin\.cache\pip
-          key: Cygwin-py3.${{ matrix.python-minor-version }}-pip-${{ hashFiles('requirements/*/*.txt') }}
+          key: Cygwin-py3.${{ matrix.python-minor-version }}-pip-${{ hashFiles('pyproject.toml') }}
           restore-keys: ${{ matrix.os }}-py3.${{ matrix.python-minor-version }}-pip-
 
       - name: Cache ccache
-        uses: actions/cache@cdf6c1fa76f9f475f3d7449005a359c84ca0f306  # v5.0.3
+        uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7  # v5.0.4
         with:
           path: C:\cygwin\home\runneradmin\.ccache
           key: Cygwin-py3.${{ matrix.python-minor-version }}-ccache-${{ hashFiles('src/*') }}
           restore-keys: Cygwin-py3.${{ matrix.python-minor-version }}-ccache-
 
       - name: Cache Matplotlib
-        uses: actions/cache@cdf6c1fa76f9f475f3d7449005a359c84ca0f306  # v5.0.3
+        uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7  # v5.0.4
         with:
           path: |
             C:\cygwin\home\runneradmin\.cache\matplotlib
@@ -175,15 +175,9 @@ jobs:
       - name: Install Python dependencies
         shell: bash.exe -eo pipefail -o igncr "{0}"
         run: |
-          python -m pip install --upgrade pip setuptools wheel
-          python -m pip install kiwisolver 'numpy>=1.22,<1.26' pillow importlib_resources
-          grep -v -F -e psutil requirements/testing/all.txt >requirements_test.txt
-          python -m pip install meson-python pybind11
+          python -m pip install --group build 'numpy>=1.25,<1.26'
           export PATH="/usr/local/bin:$PATH"
-          python -m pip install --no-build-isolation 'contourpy>=1.0.1'
-          python -m pip install --upgrade cycler fonttools \
-              packaging pyparsing python-dateutil 'setuptools-scm<10' \
-              -r requirements_test.txt sphinx ipython
+          python -m pip install --upgrade --group test sphinx ipython
           python -m pip install --upgrade pycairo 'cairocffi>=0.8' PyGObject &&
              python -c 'import gi; gi.require_version("Gtk", "3.0"); from gi.repository import Gtk' &&
              echo 'PyGObject is available' ||

diff --git a/.github/workflows/linting.yml b/.github/workflows/linting.yml
@@ -18,7 +18,7 @@ jobs:
       - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405  # v6.2.0
         with:
           python-version: "3.x"
-      - uses: j178/prek-action@0bb87d7f00b0c99306c8bcb8b8beba1eb581c037  # v1.1.1
+      - uses: j178/prek-action@79f765515bd648eb4d6bb1b17277b7cb22cb6468  # v2.0.0
         with:
           extra_args: --hook-stage manual --all-files
 
@@ -69,7 +69,7 @@ jobs:
           python-version: '3.11'
 
       - name: Install mypy
-        run: pip3 install -r requirements/testing/mypy.txt -r requirements/testing/all.txt
+        run: pip3 install --group build --group typing
 
       - name: Set up reviewdog
         uses: reviewdog/action-setup@d8a7baabd7f3e8544ee4dbde3ee41d0011c3a93f  # v1.5.0

diff --git a/.github/workflows/nightlies.yml b/.github/workflows/nightlies.yml
@@ -32,28 +32,28 @@ jobs:
         run: |
           PROJECT_REPO="matplotlib/matplotlib"
           BRANCH="main"
-          WORKFLOW_NAME="cibuildwheel.yml"
           ARTIFACT_PATTERN="cibw-wheels-*"
 
-          gh run --repo "${PROJECT_REPO}" \
-             list --branch "${BRANCH}" \
-                  --workflow "${WORKFLOW_NAME}" \
-                  --json event,status,conclusion,databaseId > runs.json
-          RUN_ID=$(
-            jq --compact-output \
-              '[
-                .[] |
-                # Filter on "push" events to main (merged PRs) ...
-                select(.event == "push") |
-                # that have completed successfully ...
-                select(.status == "completed" and .conclusion == "success")
-               ] |
-              # and get ID of latest build of wheels.
-              sort_by(.databaseId) | reverse | .[0].databaseId' runs.json
-          )
-          gh run --repo "${PROJECT_REPO}" view "${RUN_ID}"
-          gh run --repo "${PROJECT_REPO}" \
-             download "${RUN_ID}" --pattern "${ARTIFACT_PATTERN}"
+          for WORKFLOW_NAME in cibuildwheel.yml wasm.yml; do
+            gh run --repo "${PROJECT_REPO}" \
+               list --branch "${BRANCH}" \
+                    --workflow "${WORKFLOW_NAME}" \
+                    --json event,status,conclusion,databaseId > runs.json
+            RUN_ID=$(
+              jq --compact-output \
+                '[
+                  .[] |
+                  # Filter on "push" events to main (merged PRs) ...
+                  select(.event == "push") |
+                  # that have completed successfully ...
+                  select(.status == "completed" and .conclusion == "success")
+                 ] |
+                # and get ID of latest build of wheels.
+                sort_by(.databaseId) | reverse | .[0].databaseId' runs.json
+            )
+            gh run --repo "${PROJECT_REPO}" view "${RUN_ID}"
+            gh run --repo "${PROJECT_REPO}" download "${RUN_ID}" --pattern "${ARTIFACT_PATTERN}"
+          done
 
           mkdir dist
           mv ${ARTIFACT_PATTERN}/*.whl dist/

diff --git a/.github/workflows/pr_welcome.yml b/.github/workflows/pr_welcome.yml
@@ -26,7 +26,10 @@ jobs:
             If you have not heard from us in a week or so, please leave a new
             comment below and that should bring it to our attention.
             Most of our reviewers are volunteers and sometimes things fall
-            through the cracks.
+            through the cracks. We also ask that you please finish addressing
+            any review comments on this PR and wait for it to be merged (or
+            closed) before opening a new one, as it can be a valuable learning
+            experience to go through the review process.
 
 
             You can also join us [on
@@ -38,7 +41,7 @@ jobs:
             please see [the developer
             guide](https://matplotlib.org/devdocs/devel/index.html).
 
-            **Please let us know  if (and how) you use AI, it will help us give you
+            **Please let us know if (and how) you use AI, it will help us give you
             better feedback on your PR.**
 
 

diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
@@ -52,14 +52,14 @@ jobs:
           - name-suffix: "(Minimum Versions)"
             os: ubuntu-22.04
             python-version: '3.11'
-            extra-requirements: '-c requirements/testing/minver.txt'
+            extra-requirements: '-c ci/minver-requirements.txt'
             delete-font-cache: true
             # https://github.com/matplotlib/matplotlib/issues/29844
             pygobject-ver: '<3.52.0'
           - os: ubuntu-22.04
             python-version: '3.11'
             CFLAGS: "-fno-lto"  # Ensure that disabling LTO works.
-            extra-requirements: '-r requirements/testing/extra.txt'
+            extra-requirements: '--group test-extra'
             # https://github.com/matplotlib/matplotlib/issues/29844
             pygobject-ver: '<3.52.0'
           - name-suffix: "(Extra TeX packages)"
@@ -205,31 +205,33 @@ jobs:
           esac
 
       - name: Cache pip
-        uses: actions/cache@cdf6c1fa76f9f475f3d7449005a359c84ca0f306  # v5.0.3
+        uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7  # v5.0.4
         if: startsWith(runner.os, 'Linux')
         with:
           path: ~/.cache/pip
-          key: ${{ matrix.os }}-py${{ matrix.python-version }}-pip-${{ hashFiles('requirements/*/*.txt') }}
+          key: |
+            ${{ matrix.os }}-py${{ matrix.python-version }}-pip-${{
+            hashFiles('pyproject.toml', 'ci/minver-requirements.txt') }}
           restore-keys: |
             ${{ matrix.os }}-py${{ matrix.python-version }}-pip-
       - name: Cache pip
-        uses: actions/cache@cdf6c1fa76f9f475f3d7449005a359c84ca0f306  # v5.0.3
+        uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7  # v5.0.4
         if: startsWith(runner.os, 'macOS')
         with:
           path: ~/Library/Caches/pip
-          key: ${{ matrix.os }}-py${{ matrix.python-version }}-pip-${{ hashFiles('requirements/*/*.txt') }}
+          key: ${{ matrix.os }}-py${{ matrix.python-version }}-pip-${{ hashFiles('pyproject.toml') }}
           restore-keys: |
             ${{ matrix.os }}-py${{ matrix.python-version }}-pip-
       - name: Cache ccache
-        uses: actions/cache@cdf6c1fa76f9f475f3d7449005a359c84ca0f306  # v5.0.3
+        uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7  # v5.0.4
         with:
           path: |
             ~/.ccache
           key: ${{ matrix.os }}-py${{ matrix.python-version }}-ccache-${{ hashFiles('src/*') }}
           restore-keys: |
             ${{ matrix.os }}-py${{ matrix.python-version }}-ccache-
       - name: Cache Matplotlib
-        uses: actions/cache@cdf6c1fa76f9f475f3d7449005a359c84ca0f306  # v5.0.3
+        uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7  # v5.0.4
         with:
           path: |
             ~/.cache/matplotlib
@@ -254,12 +256,8 @@ jobs:
 
           # Install dependencies from PyPI.
           # Preinstall build requirements to enable no-build-isolation builds.
-          python -m pip install --upgrade $PRE \
-            'contourpy>=1.0.1' cycler fonttools kiwisolver importlib_resources \
-            packaging pillow 'pyparsing!=3.1.0' python-dateutil 'setuptools-scm<10' \
-            'meson-python>=0.13.1' 'pybind11>=2.13.2' \
-            -r requirements/testing/all.txt \
-            ${{ matrix.extra-requirements }}
+          python -m pip install --upgrade $PRE --prefer-binary \
+            --group build --group test ${{ matrix.extra-requirements }}
 
           # Install optional dependencies from PyPI.
           # Sphinx is needed to run sphinxext tests
@@ -417,7 +415,7 @@ jobs:
           fi
       - name: Upload code coverage
         if: ${{ !cancelled() && github.event_name != 'schedule' }}
-        uses: codecov/codecov-action@671740ac38dd9b0130fbe1cec585b89eea48d3de  # v5.5.2
+        uses: codecov/codecov-action@1af58845a975a7985b0beb0cbe6fbbb71a41dbad  # v5.5.3
         with:
           name: "${{ matrix.python-version }} ${{ matrix.os }} ${{ matrix.name-suffix }}"
           token: ${{ secrets.CODECOV_TOKEN }}