diff --git a/.github/workflows/add-issue-header.yml b/.github/workflows/add-issue-header.yml
deleted file mode 100644
index 3cbc23af578d10..00000000000000
--- a/.github/workflows/add-issue-header.yml
+++ /dev/null
@@ -1,54 +0,0 @@
-name: Add issue header
-# Automatically edits an issue's descriptions with a header,
-# one of:
-#
-# - Bug report
-# - Crash report
-# - Feature or enhancement
-
-on:
-  issues:
-    types:
-      # Only ever run once
-      - opened
-
-
-jobs:
-  add-header:
-    runs-on: ubuntu-latest
-    permissions:
-      issues: write
-    timeout-minutes: 5
-    steps:
-      - uses: actions/github-script@v7
-        with:
-          # language=JavaScript
-          script: |
-            // https://devguide.python.org/triage/labels/#type-labels
-            const HEADERS = new Map([
-              ['type-bug', 'Bug report'],
-              ['type-crash', 'Crash report'],
-              ['type-feature', 'Feature or enhancement'],
-            ]);
-            let issue_data = await github.rest.issues.get({
-              issue_number: context.issue.number,
-              owner: context.repo.owner,
-              repo: context.repo.repo
-            }).then(issue => issue.data);
-            let header = '';
-            for (const label_data of issue_data.labels) {
-                const label_name = (typeof label_data === 'string') ? label_data : label_data.name;
-                if (HEADERS.has(label_name)) {
-                    header = HEADERS.get(label_name);
-                    break;
-                }
-            }
-            if (header !== '') {
-              console.log(`Setting new header: ${header}`);
-              await github.rest.issues.update({
-                  issue_number: context.issue.number,
-                  owner: context.repo.owner,
-                  repo: context.repo.repo,
-                  body: `# ${header}\n\n${issue_data.body.replaceAll('\r', '')}`
-              });
-            }
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b192508c78685c..fe0780f0d15428 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -3,13 +3,7 @@ name: Tests
 on:
   workflow_dispatch:
   push:
-    branches:
-    - 'main'
-    - '3.*'
   pull_request:
-    branches:
-    - 'main'
-    - '3.*'
 
 permissions:
   contents: read
@@ -36,638 +30,3 @@ jobs:
     #   }}
     #
     uses: ./.github/workflows/reusable-context.yml
-
-  check-docs:
-    name: Docs
-    needs: build-context
-    if: fromJSON(needs.build-context.outputs.run-docs)
-    uses: ./.github/workflows/reusable-docs.yml
-
-  check-autoconf-regen:
-    name: 'Check if Autoconf files are up to date'
-    # Don't use ubuntu-latest but a specific version to make the job
-    # reproducible: to get the same tools versions (autoconf, aclocal, ...)
-    runs-on: ubuntu-24.04
-    container:
-      image: ghcr.io/python/autoconf:2025.01.02.12581854023
-    timeout-minutes: 60
-    needs: build-context
-    if: needs.build-context.outputs.run-tests == 'true'
-    steps:
-      - name: Install Git
-        run: |
-          apt update && apt install git -yq
-          git config --global --add safe.directory "$GITHUB_WORKSPACE"
-      - uses: actions/checkout@v4
-        with:
-          fetch-depth: 1
-          persist-credentials: false
-      - name: Check Autoconf and aclocal versions
-        run: |
-          grep "Generated by GNU Autoconf 2.72" configure
-          grep "aclocal 1.16.5" aclocal.m4
-          grep -q "runstatedir" configure
-          grep -q "PKG_PROG_PKG_CONFIG" aclocal.m4
-      - name: Regenerate autoconf files
-        # Same command used by Tools/build/regen-configure.sh ($AUTORECONF)
-        run: autoreconf -ivf -Werror
-      - name: Check for changes
-        run: |
-          git add -u
-          changes=$(git status --porcelain)
-          # Check for changes in regenerated files
-          if test -n "$changes"; then
-            echo "Generated files not up to date."
-            echo "Perhaps you forgot to run make regen-configure ;)"
-            echo "configure files must be regenerated with a specific version of autoconf."
-            echo "$changes"
-            echo ""
-            git diff --staged || true
-            exit 1
-          fi
-
-  check-generated-files:
-    name: 'Check if generated files are up to date'
-    # Don't use ubuntu-latest but a specific version to make the job
-    # reproducible: to get the same tools versions (autoconf, aclocal, ...)
-    runs-on: ubuntu-24.04
-    timeout-minutes: 60
-    needs: build-context
-    if: needs.build-context.outputs.run-tests == 'true'
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          persist-credentials: false
-      - uses: actions/setup-python@v5
-        with:
-          python-version: '3.x'
-      - name: Runner image version
-        run: echo "IMAGE_OS_VERSION=${ImageOS}-${ImageVersion}" >> "$GITHUB_ENV"
-      - name: Restore config.cache
-        uses: actions/cache@v4
-        with:
-          path: config.cache
-          # Include env.pythonLocation in key to avoid changes in environment when setup-python updates Python
-          key: ${{ github.job }}-${{ env.IMAGE_OS_VERSION }}-${{ needs.build-context.outputs.config-hash }}-${{ env.pythonLocation }}
-      - name: Install dependencies
-        run: sudo ./.github/workflows/posix-deps-apt.sh
-      - name: Add ccache to PATH
-        run: echo "PATH=/usr/lib/ccache:$PATH" >> "$GITHUB_ENV"
-      - name: Configure ccache action
-        uses: hendrikmuhs/ccache-action@v1.2
-        with:
-          save: false
-      - name: Configure CPython
-        run: |
-          # Build Python with the libpython dynamic library
-          ./configure --config-cache --with-pydebug --enable-shared
-      - name: Build CPython
-        run: |
-          make -j4 regen-all
-          make regen-stdlib-module-names regen-sbom regen-unicodedata
-      - name: Check for changes
-        run: |
-          git add -u
-          changes=$(git status --porcelain)
-          # Check for changes in regenerated files
-          if test -n "$changes"; then
-            echo "Generated files not up to date."
-            echo "Perhaps you forgot to run make regen-all or build.bat --regen. ;)"
-            echo "configure files must be regenerated with a specific version of autoconf."
-            echo "$changes"
-            echo ""
-            git diff --staged || true
-            exit 1
-          fi
-      - name: Check exported libpython symbols
-        run: make smelly
-      - name: Check limited ABI symbols
-        run: make check-limited-abi
-      - name: Check for unsupported C global variables
-        if: github.event_name == 'pull_request'  # $GITHUB_EVENT_NAME
-        run: make check-c-globals
-
-  build-windows:
-    name: >-
-      Windows
-      ${{ fromJSON(matrix.free-threading) && '(free-threading)' || '' }}
-    needs: build-context
-    if: fromJSON(needs.build-context.outputs.run-windows-tests)
-    strategy:
-      fail-fast: false
-      matrix:
-        arch:
-          - x64
-          - Win32
-          - arm64
-        free-threading:
-          - false
-          - true
-        exclude:
-          # Skip Win32 on free-threaded builds
-          - { arch: Win32, free-threading: true }
-    uses: ./.github/workflows/reusable-windows.yml
-    with:
-      arch: ${{ matrix.arch }}
-      free-threading: ${{ matrix.free-threading }}
-
-  build-windows-msi:
-    name: >-  # ${{ '' } is a hack to nest jobs under the same sidebar category
-      Windows MSI${{ '' }}
-    needs: build-context
-    if: fromJSON(needs.build-context.outputs.run-windows-msi)
-    strategy:
-      fail-fast: false
-      matrix:
-        arch:
-        - x86
-        - x64
-        - arm64
-    uses: ./.github/workflows/reusable-windows-msi.yml
-    with:
-      arch: ${{ matrix.arch }}
-
-  build-macos:
-    name: >-
-      macOS
-      ${{ fromJSON(matrix.free-threading) && '(free-threading)' || '' }}
-    needs: build-context
-    if: needs.build-context.outputs.run-tests == 'true'
-    strategy:
-      fail-fast: false
-      matrix:
-        # Cirrus and macos-14 are M1, macos-13 is default GHA Intel.
-        # macOS 13 only runs tests against the GIL-enabled CPython.
-        # Cirrus used for upstream, macos-14 for forks.
-        os:
-        - ghcr.io/cirruslabs/macos-runner:sonoma
-        - macos-14
-        - macos-13
-        is-fork:  # only used for the exclusion trick
-        - ${{ github.repository_owner != 'python' }}
-        free-threading:
-        - false
-        - true
-        exclude:
-        - os: ghcr.io/cirruslabs/macos-runner:sonoma
-          is-fork: true
-        - os: macos-14
-          is-fork: false
-        - os: macos-13
-          free-threading: true
-    uses: ./.github/workflows/reusable-macos.yml
-    with:
-      config_hash: ${{ needs.build-context.outputs.config-hash }}
-      free-threading: ${{ matrix.free-threading }}
-      os: ${{ matrix.os }}
-
-  build-ubuntu:
-    name: >-
-      Ubuntu
-      ${{ fromJSON(matrix.free-threading) && '(free-threading)' || '' }}
-      ${{ fromJSON(matrix.bolt) && '(bolt)' || '' }}
-    needs: build-context
-    if: needs.build-context.outputs.run-tests == 'true'
-    strategy:
-      fail-fast: false
-      matrix:
-        bolt:
-        - false
-        - true
-        free-threading:
-        - false
-        - true
-        os:
-        - ubuntu-24.04
-        - ubuntu-24.04-arm
-        exclude:
-        # Do not test BOLT with free-threading, to conserve resources
-        - bolt: true
-          free-threading: true
-        # BOLT currently crashes during instrumentation on aarch64
-        - os: ubuntu-24.04-arm
-          bolt: true
-    uses: ./.github/workflows/reusable-ubuntu.yml
-    with:
-      config_hash: ${{ needs.build-context.outputs.config-hash }}
-      bolt-optimizations: ${{ matrix.bolt }}
-      free-threading: ${{ matrix.free-threading }}
-      os: ${{ matrix.os }}
-
-  build-ubuntu-ssltests:
-    name: 'Ubuntu SSL tests with OpenSSL'
-    runs-on: ${{ matrix.os }}
-    timeout-minutes: 60
-    needs: build-context
-    if: needs.build-context.outputs.run-tests == 'true'
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [ubuntu-24.04]
-        openssl_ver: [3.0.16, 3.1.8, 3.2.4, 3.3.3, 3.4.1]
-        # See Tools/ssl/make_ssl_data.py for notes on adding a new version
-    env:
-      OPENSSL_VER: ${{ matrix.openssl_ver }}
-      MULTISSL_DIR: ${{ github.workspace }}/multissl
-      OPENSSL_DIR: ${{ github.workspace }}/multissl/openssl/${{ matrix.openssl_ver }}
-      LD_LIBRARY_PATH: ${{ github.workspace }}/multissl/openssl/${{ matrix.openssl_ver }}/lib
-    steps:
-    - uses: actions/checkout@v4
-      with:
-        persist-credentials: false
-    - name: Runner image version
-      run: echo "IMAGE_OS_VERSION=${ImageOS}-${ImageVersion}" >> "$GITHUB_ENV"
-    - name: Restore config.cache
-      uses: actions/cache@v4
-      with:
-        path: config.cache
-        key: ${{ github.job }}-${{ env.IMAGE_OS_VERSION }}-${{ needs.build-context.outputs.config-hash }}
-    - name: Register gcc problem matcher
-      run: echo "::add-matcher::.github/problem-matchers/gcc.json"
-    - name: Install dependencies
-      run: sudo ./.github/workflows/posix-deps-apt.sh
-    - name: Configure OpenSSL env vars
-      run: |
-        echo "MULTISSL_DIR=${GITHUB_WORKSPACE}/multissl" >> "$GITHUB_ENV"
-        echo "OPENSSL_DIR=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}" >> "$GITHUB_ENV"
-        echo "LD_LIBRARY_PATH=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}/lib" >> "$GITHUB_ENV"
-    - name: 'Restore OpenSSL build'
-      id: cache-openssl
-      uses: actions/cache@v4
-      with:
-        path: ./multissl/openssl/${{ env.OPENSSL_VER }}
-        key: ${{ matrix.os }}-multissl-openssl-${{ env.OPENSSL_VER }}
-    - name: Install OpenSSL
-      if: steps.cache-openssl.outputs.cache-hit != 'true'
-      run: python3 Tools/ssl/multissltests.py --steps=library --base-directory "$MULTISSL_DIR" --openssl "$OPENSSL_VER" --system Linux
-    - name: Add ccache to PATH
-      run: |
-        echo "PATH=/usr/lib/ccache:$PATH" >> "$GITHUB_ENV"
-    - name: Configure ccache action
-      uses: hendrikmuhs/ccache-action@v1.2
-      with:
-        save: false
-    - name: Configure CPython
-      run: ./configure CFLAGS="-fdiagnostics-format=json" --config-cache --enable-slower-safety --with-pydebug --with-openssl="$OPENSSL_DIR"
-    - name: Build CPython
-      run: make -j4
-    - name: Display build info
-      run: make pythoninfo
-    - name: SSL tests
-      run: ./python Lib/test/ssltests.py
-
-  build-wasi:
-    name: 'WASI'
-    needs: build-context
-    if: needs.build-context.outputs.run-tests == 'true'
-    uses: ./.github/workflows/reusable-wasi.yml
-    with:
-      config_hash: ${{ needs.build-context.outputs.config-hash }}
-
-  test-hypothesis:
-    name: "Hypothesis tests on Ubuntu"
-    runs-on: ubuntu-24.04
-    timeout-minutes: 60
-    needs: build-context
-    if: needs.build-context.outputs.run-tests == 'true'
-    env:
-      OPENSSL_VER: 3.0.16
-      PYTHONSTRICTEXTENSIONBUILD: 1
-    steps:
-    - uses: actions/checkout@v4
-      with:
-        persist-credentials: false
-    - name: Register gcc problem matcher
-      run: echo "::add-matcher::.github/problem-matchers/gcc.json"
-    - name: Install dependencies
-      run: sudo ./.github/workflows/posix-deps-apt.sh
-    - name: Configure OpenSSL env vars
-      run: |
-        echo "MULTISSL_DIR=${GITHUB_WORKSPACE}/multissl" >> "$GITHUB_ENV"
-        echo "OPENSSL_DIR=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}" >> "$GITHUB_ENV"
-        echo "LD_LIBRARY_PATH=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}/lib" >> "$GITHUB_ENV"
-    - name: 'Restore OpenSSL build'
-      id: cache-openssl
-      uses: actions/cache@v4
-      with:
-        path: ./multissl/openssl/${{ env.OPENSSL_VER }}
-        key: ${{ runner.os }}-multissl-openssl-${{ env.OPENSSL_VER }}
-    - name: Install OpenSSL
-      if: steps.cache-openssl.outputs.cache-hit != 'true'
-      run: python3 Tools/ssl/multissltests.py --steps=library --base-directory "$MULTISSL_DIR" --openssl "$OPENSSL_VER" --system Linux
-    - name: Add ccache to PATH
-      run: |
-        echo "PATH=/usr/lib/ccache:$PATH" >> "$GITHUB_ENV"
-    - name: Configure ccache action
-      uses: hendrikmuhs/ccache-action@v1.2
-      with:
-        save: false
-    - name: Setup directory envs for out-of-tree builds
-      run: |
-        echo "CPYTHON_RO_SRCDIR=$(realpath -m "${GITHUB_WORKSPACE}"/../cpython-ro-srcdir)" >> "$GITHUB_ENV"
-        echo "CPYTHON_BUILDDIR=$(realpath -m "${GITHUB_WORKSPACE}"/../cpython-builddir)" >> "$GITHUB_ENV"
-    - name: Create directories for read-only out-of-tree builds
-      run: mkdir -p "$CPYTHON_RO_SRCDIR" "$CPYTHON_BUILDDIR"
-    - name: Bind mount sources read-only
-      run: sudo mount --bind -o ro "$GITHUB_WORKSPACE" "$CPYTHON_RO_SRCDIR"
-    - name: Runner image version
-      run: echo "IMAGE_OS_VERSION=${ImageOS}-${ImageVersion}" >> "$GITHUB_ENV"
-    - name: Restore config.cache
-      uses: actions/cache@v4
-      with:
-        path: ${{ env.CPYTHON_BUILDDIR }}/config.cache
-        key: ${{ github.job }}-${{ env.IMAGE_OS_VERSION }}-${{ needs.build-context.outputs.config-hash }}
-    - name: Configure CPython out-of-tree
-      working-directory: ${{ env.CPYTHON_BUILDDIR }}
-      run: |
-        ../cpython-ro-srcdir/configure \
-          --config-cache \
-          --with-pydebug \
-          --enable-slower-safety \
-          --with-openssl="$OPENSSL_DIR"
-    - name: Build CPython out-of-tree
-      working-directory: ${{ env.CPYTHON_BUILDDIR }}
-      run: make -j4
-    - name: Display build info
-      working-directory: ${{ env.CPYTHON_BUILDDIR }}
-      run: make pythoninfo
-    - name: Remount sources writable for tests
-      # some tests write to srcdir, lack of pyc files slows down testing
-      run: sudo mount "$CPYTHON_RO_SRCDIR" -oremount,rw
-    - name: Setup directory envs for out-of-tree builds
-      run: |
-        echo "CPYTHON_BUILDDIR=$(realpath -m "${GITHUB_WORKSPACE}"/../cpython-builddir)" >> "$GITHUB_ENV"
-    - name: "Create hypothesis venv"
-      working-directory: ${{ env.CPYTHON_BUILDDIR }}
-      run: |
-        VENV_LOC=$(realpath -m .)/hypovenv
-        VENV_PYTHON=$VENV_LOC/bin/python
-        echo "HYPOVENV=${VENV_LOC}" >> "$GITHUB_ENV"
-        echo "VENV_PYTHON=${VENV_PYTHON}" >> "$GITHUB_ENV"
-        ./python -m venv "$VENV_LOC" && "$VENV_PYTHON" -m pip install -r "${GITHUB_WORKSPACE}/Tools/requirements-hypothesis.txt"
-    - name: 'Restore Hypothesis database'
-      id: cache-hypothesis-database
-      uses: actions/cache@v4
-      with:
-        path: ${{ env.CPYTHON_BUILDDIR }}/.hypothesis/
-        key: hypothesis-database-${{ github.head_ref || github.run_id }}
-        restore-keys: |
-          hypothesis-database-
-    - name: "Run tests"
-      working-directory: ${{ env.CPYTHON_BUILDDIR }}
-      run: |
-        # Most of the excluded tests are slow test suites with no property tests
-        #
-        # (GH-104097) test_sysconfig is skipped because it has tests that are
-        # failing when executed from inside a virtual environment.
-        "${VENV_PYTHON}" -m test \
-          -W \
-          --slowest \
-          -j4 \
-          --timeout 900 \
-          -x test_asyncio \
-          -x test_multiprocessing_fork \
-          -x test_multiprocessing_forkserver \
-          -x test_multiprocessing_spawn \
-          -x test_concurrent_futures \
-          -x test_socket \
-          -x test_subprocess \
-          -x test_signal \
-          -x test_sysconfig
-    - uses: actions/upload-artifact@v4
-      if: always()
-      with:
-        name: hypothesis-example-db
-        path: ${{ env.CPYTHON_BUILDDIR }}/.hypothesis/examples/
-
-  build-asan:
-    name: 'Address sanitizer'
-    runs-on: ${{ matrix.os }}
-    timeout-minutes: 60
-    needs: build-context
-    if: needs.build-context.outputs.run-tests == 'true'
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [ubuntu-24.04]
-    env:
-      OPENSSL_VER: 3.0.16
-      PYTHONSTRICTEXTENSIONBUILD: 1
-      ASAN_OPTIONS: detect_leaks=0:allocator_may_return_null=1:handle_segv=0
-    steps:
-    - uses: actions/checkout@v4
-      with:
-        persist-credentials: false
-    - name: Runner image version
-      run: echo "IMAGE_OS_VERSION=${ImageOS}-${ImageVersion}" >> "$GITHUB_ENV"
-    - name: Restore config.cache
-      uses: actions/cache@v4
-      with:
-        path: config.cache
-        key: ${{ github.job }}-${{ env.IMAGE_OS_VERSION }}-${{ needs.build-context.outputs.config-hash }}
-    - name: Register gcc problem matcher
-      run: echo "::add-matcher::.github/problem-matchers/gcc.json"
-    - name: Install dependencies
-      run: sudo ./.github/workflows/posix-deps-apt.sh
-    - name: Set up GCC-10 for ASAN
-      uses: egor-tensin/setup-gcc@v1
-      with:
-        version: 10
-    - name: Configure OpenSSL env vars
-      run: |
-        echo "MULTISSL_DIR=${GITHUB_WORKSPACE}/multissl" >> "$GITHUB_ENV"
-        echo "OPENSSL_DIR=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}" >> "$GITHUB_ENV"
-        echo "LD_LIBRARY_PATH=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}/lib" >> "$GITHUB_ENV"
-    - name: 'Restore OpenSSL build'
-      id: cache-openssl
-      uses: actions/cache@v4
-      with:
-        path: ./multissl/openssl/${{ env.OPENSSL_VER }}
-        key: ${{ matrix.os }}-multissl-openssl-${{ env.OPENSSL_VER }}
-    - name: Install OpenSSL
-      if: steps.cache-openssl.outputs.cache-hit != 'true'
-      run: python3 Tools/ssl/multissltests.py --steps=library --base-directory "$MULTISSL_DIR" --openssl "$OPENSSL_VER" --system Linux
-    - name: Add ccache to PATH
-      run: |
-        echo "PATH=/usr/lib/ccache:$PATH" >> "$GITHUB_ENV"
-    - name: Configure ccache action
-      uses: hendrikmuhs/ccache-action@v1.2
-      with:
-        save: ${{ github.event_name == 'push' }}
-        max-size: "200M"
-    - name: Configure CPython
-      run: ./configure --config-cache --with-address-sanitizer --without-pymalloc
-    - name: Build CPython
-      run: make -j4
-    - name: Display build info
-      run: make pythoninfo
-    - name: Tests
-      run: xvfb-run make ci
-
-  build-tsan:
-    name: >-
-      Thread sanitizer
-      ${{ fromJSON(matrix.free-threading) && '(free-threading)' || '' }}
-    needs: build-context
-    if: needs.build-context.outputs.run-tests == 'true'
-    strategy:
-      fail-fast: false
-      matrix:
-        free-threading:
-        - false
-        - true
-    uses: ./.github/workflows/reusable-tsan.yml
-    with:
-      config_hash: ${{ needs.build-context.outputs.config-hash }}
-      free-threading: ${{ matrix.free-threading }}
-
-  cross-build-linux:
-    name: Cross build Linux
-    runs-on: ubuntu-latest
-    timeout-minutes: 60
-    needs: build-context
-    if: needs.build-context.outputs.run-tests == 'true'
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          persist-credentials: false
-      - name: Runner image version
-        run: echo "IMAGE_OS_VERSION=${ImageOS}-${ImageVersion}" >> "$GITHUB_ENV"
-      - name: Restore config.cache
-        uses: actions/cache@v4
-        with:
-          path: config.cache
-          key: ${{ github.job }}-${{ env.IMAGE_OS_VERSION }}-${{ needs.build-context.outputs.config-hash }}
-      - name: Register gcc problem matcher
-        run: echo "::add-matcher::.github/problem-matchers/gcc.json"
-      - name: Set build dir
-        run:
-          # an absolute path outside of the working directoy
-          echo "BUILD_DIR=$(realpath ${{ github.workspace }}/../build)" >> "$GITHUB_ENV"
-      - name: Install dependencies
-        run: sudo ./.github/workflows/posix-deps-apt.sh
-      - name: Configure host build
-        run: ./configure --prefix="$BUILD_DIR/host-python"
-      - name: Install host Python
-        run: make -j8 install
-      - name: Run test subset with host build
-        run: |
-          "$BUILD_DIR/host-python/bin/python3" -m test test_sysconfig test_site test_embed
-      - name: Configure cross build
-        run: ./configure --prefix="$BUILD_DIR/cross-python" --with-build-python="$BUILD_DIR/host-python/bin/python3"
-      - name: Install cross Python
-        run: make -j8 install
-      - name: Run test subset with host build
-        run: |
-          "$BUILD_DIR/cross-python/bin/python3" -m test test_sysconfig test_site test_embed
-
-  # CIFuzz job based on https://google.github.io/oss-fuzz/getting-started/continuous-integration/
-  cifuzz:
-    name: CIFuzz
-    runs-on: ubuntu-latest
-    timeout-minutes: 60
-    needs: build-context
-    if: needs.build-context.outputs.run-ci-fuzz == 'true'
-    permissions:
-      security-events: write
-    strategy:
-      fail-fast: false
-      matrix:
-        sanitizer: [address, undefined, memory]
-    steps:
-      - name: Build fuzzers (${{ matrix.sanitizer }})
-        id: build
-        uses: google/oss-fuzz/infra/cifuzz/actions/build_fuzzers@master
-        with:
-          oss-fuzz-project-name: cpython3
-          sanitizer: ${{ matrix.sanitizer }}
-      - name: Run fuzzers (${{ matrix.sanitizer }})
-        uses: google/oss-fuzz/infra/cifuzz/actions/run_fuzzers@master
-        with:
-          fuzz-seconds: 600
-          oss-fuzz-project-name: cpython3
-          output-sarif: true
-          sanitizer: ${{ matrix.sanitizer }}
-      - name: Upload crash
-        if: failure() && steps.build.outcome == 'success'
-        uses: actions/upload-artifact@v4
-        with:
-          name: ${{ matrix.sanitizer }}-artifacts
-          path: ./out/artifacts
-      - name: Upload SARIF
-        if: always() && steps.build.outcome == 'success'
-        uses: github/codeql-action/upload-sarif@v3
-        with:
-          sarif_file: cifuzz-sarif/results.sarif
-          checkout_path: cifuzz-sarif
-
-  all-required-green:  # This job does nothing and is only used for the branch protection
-    name: All required checks pass
-    runs-on: ubuntu-latest
-    timeout-minutes: 5
-    needs:
-    - build-context  # Transitive dependency, needed to access `run-tests` value
-    - check-docs
-    - check-autoconf-regen
-    - check-generated-files
-    - build-windows
-    - build-windows-msi
-    - build-macos
-    - build-ubuntu
-    - build-ubuntu-ssltests
-    - build-wasi
-    - test-hypothesis
-    - build-asan
-    - build-tsan
-    - cross-build-linux
-    - cifuzz
-    if: always()
-
-    steps:
-    - name: Check whether the needed jobs succeeded or failed
-      uses: re-actors/alls-green@05ac9388f0aebcb5727afa17fcccfecd6f8ec5fe
-      with:
-        allowed-failures: >-
-          build-windows-msi,
-          build-ubuntu-ssltests,
-          test-hypothesis,
-          cifuzz,
-        allowed-skips: >-
-          ${{
-            !fromJSON(needs.build-context.outputs.run-docs)
-            && '
-            check-docs,
-            '
-            || ''
-          }}
-          ${{
-            needs.build-context.outputs.run-tests != 'true'
-            && '
-            check-autoconf-regen,
-            check-generated-files,
-            build-macos,
-            build-ubuntu,
-            build-ubuntu-ssltests,
-            build-wasi,
-            test-hypothesis,
-            build-asan,
-            build-tsan,
-            cross-build-linux,
-            '
-            || ''
-          }}
-          ${{
-            !fromJSON(needs.build-context.outputs.run-windows-tests)
-            && '
-            build-windows,
-            '
-            || ''
-          }}
-          ${{
-            !fromJSON(needs.build-context.outputs.run-ci-fuzz)
-            && '
-            cifuzz,
-            '
-            || ''
-          }}
-        jobs: ${{ toJSON(needs) }}
diff --git a/.github/workflows/documentation-links.yml b/.github/workflows/documentation-links.yml
deleted file mode 100644
index a09a30587b35eb..00000000000000
--- a/.github/workflows/documentation-links.yml
+++ /dev/null
@@ -1,28 +0,0 @@
-name: Read the Docs PR preview
-# Automatically edits a pull request's descriptions with a link
-# to the documentation's preview on Read the Docs.
-
-on:
-  pull_request_target:
-    types:
-      - opened
-    paths:
-    - 'Doc/**'
-    - '.github/workflows/doc.yml'
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
-  cancel-in-progress: true
-
-jobs:
-  documentation-links:
-    runs-on: ubuntu-latest
-    permissions:
-      pull-requests: write
-    timeout-minutes: 5
-
-    steps:
-      - uses: readthedocs/actions/preview@v1
-        with:
-          project-slug: "cpython-previews"
-          single-version: "true"
diff --git a/.github/workflows/jit.yml b/.github/workflows/jit.yml
deleted file mode 100644
index 116e0c1e945e38..00000000000000
--- a/.github/workflows/jit.yml
+++ /dev/null
@@ -1,155 +0,0 @@
-name: JIT
-on:
-  pull_request:
-    paths:
-      - '**jit**'
-      - 'Python/bytecodes.c'
-      - 'Python/optimizer*.c'
-      - '!Python/perf_jit_trampoline.c'
-      - '!**/*.md'
-      - '!**/*.ini'
-  push:
-    paths:
-      - '**jit**'
-      - 'Python/bytecodes.c'
-      - 'Python/optimizer*.c'
-      - '!Python/perf_jit_trampoline.c'
-      - '!**/*.md'
-      - '!**/*.ini'
-  workflow_dispatch:
-
-permissions:
-  contents: read
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
-  cancel-in-progress: true
-
-env:
-  FORCE_COLOR: 1
-
-jobs:
-  interpreter:
-    name: Interpreter (Debug)
-    runs-on: ubuntu-24.04
-    timeout-minutes: 90
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          persist-credentials: false
-      - name: Build tier two interpreter
-        run: |
-          ./configure --enable-experimental-jit=interpreter --with-pydebug
-          make all --jobs 4
-      - name: Test tier two interpreter
-        run: |
-          ./python -m test --multiprocess 0 --timeout 4500 --verbose2 --verbose3
-  jit:
-    name: ${{ matrix.target }} (${{ matrix.debug && 'Debug' || 'Release' }})
-    needs: interpreter
-    runs-on: ${{ matrix.runner }}
-    timeout-minutes: 90
-    strategy:
-      fail-fast: false
-      matrix:
-        target:
-          - i686-pc-windows-msvc/msvc
-          - x86_64-pc-windows-msvc/msvc
-          - aarch64-pc-windows-msvc/msvc
-          - x86_64-apple-darwin/clang
-          - aarch64-apple-darwin/clang
-          - x86_64-unknown-linux-gnu/gcc
-          - aarch64-unknown-linux-gnu/gcc
-        debug:
-          - true
-          - false
-        llvm:
-          - 19
-        include:
-          - target: i686-pc-windows-msvc/msvc
-            architecture: Win32
-            runner: windows-latest
-          - target: x86_64-pc-windows-msvc/msvc
-            architecture: x64
-            runner: windows-latest
-          - target: aarch64-pc-windows-msvc/msvc
-            architecture: ARM64
-            runner: windows-11-arm
-          - target: x86_64-apple-darwin/clang
-            architecture: x86_64
-            runner: macos-13
-          - target: aarch64-apple-darwin/clang
-            architecture: aarch64
-            runner: macos-14
-          - target: x86_64-unknown-linux-gnu/gcc
-            architecture: x86_64
-            runner: ubuntu-24.04
-          - target: aarch64-unknown-linux-gnu/gcc
-            architecture: aarch64
-            runner: ubuntu-24.04-arm
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          persist-credentials: false
-      - uses: actions/setup-python@v5
-        with:
-          python-version: '3.11'
-
-      # PCbuild downloads LLVM automatically:
-      - name: Windows
-        if: runner.os == 'Windows'
-        run: |
-          ./PCbuild/build.bat --experimental-jit ${{ matrix.debug && '-d' || '' }} -p ${{ matrix.architecture }}
-          ./PCbuild/rt.bat ${{ matrix.debug && '-d' || '' }} -p ${{ matrix.architecture }} -q --multiprocess 0 --timeout 4500 --verbose2 --verbose3
-
-        # The `find` line is required as a result of https://github.com/actions/runner-images/issues/9966.
-        # This is a bug in the macOS runner image where the pre-installed Python is installed in the same
-        # directory as the Homebrew Python, which causes the build to fail for macos-13. This line removes
-        # the symlink to the pre-installed Python so that the Homebrew Python is used instead.
-      - name: macOS
-        if: runner.os == 'macOS'
-        run: |
-          brew update
-          find /usr/local/bin -lname '*/Library/Frameworks/Python.framework/*' -delete
-          brew install llvm@${{ matrix.llvm }}
-          export SDKROOT="$(xcrun --show-sdk-path)"
-          ./configure --enable-experimental-jit --enable-universalsdk --with-universal-archs=universal2 ${{ matrix.debug && '--with-pydebug' || '' }}
-          make all --jobs 4
-          ./python.exe -m test --multiprocess 0 --timeout 4500 --verbose2 --verbose3
-
-      - name: Linux
-        if: runner.os == 'Linux'
-        run: |
-          sudo bash -c "$(wget -O - https://apt.llvm.org/llvm.sh)" ./llvm.sh ${{ matrix.llvm }}
-          export PATH="$(llvm-config-${{ matrix.llvm }} --bindir):$PATH"
-          ./configure --enable-experimental-jit ${{ matrix.debug && '--with-pydebug' || '' }}
-          make all --jobs 4
-          ./python -m test --multiprocess 0 --timeout 4500 --verbose2 --verbose3
-
-  # XXX: GH-133171
-  # jit-with-disabled-gil:
-  #   name: Free-Threaded (Debug)
-  #   needs: interpreter
-  #   runs-on: ubuntu-24.04
-  #   timeout-minutes: 90
-  #   strategy:
-  #     fail-fast: false
-  #     matrix:
-  #       llvm:
-  #         - 19
-  #   steps:
-  #     - uses: actions/checkout@v4
-  #       with:
-  #         persist-credentials: false
-  #     - uses: actions/setup-python@v5
-  #       with:
-  #         python-version: '3.11'
-  #     - name: Build with JIT enabled and GIL disabled
-  #       run: |
-  #         sudo bash -c "$(wget -O - https://apt.llvm.org/llvm.sh)" ./llvm.sh ${{ matrix.llvm }}
-  #         export PATH="$(llvm-config-${{ matrix.llvm }} --bindir):$PATH"
-  #         ./configure --enable-experimental-jit --with-pydebug --disable-gil
-  #         make all --jobs 4
-  #     - name: Run tests
-  #       run: |
-  #         ./python -m test --multiprocess 0 --timeout 4500 --verbose2 --verbose3
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
deleted file mode 100644
index d74ce8fcc256dc..00000000000000
--- a/.github/workflows/lint.yml
+++ /dev/null
@@ -1,28 +0,0 @@
-name: Lint
-
-on: [push, pull_request, workflow_dispatch]
-
-permissions:
-  contents: read
-
-env:
-  FORCE_COLOR: 1
-  RUFF_OUTPUT_FORMAT: github
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
-  cancel-in-progress: true
-
-jobs:
-  lint:
-    runs-on: ubuntu-latest
-    timeout-minutes: 10
-
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          persist-credentials: false
-      - uses: actions/setup-python@v5
-        with:
-          python-version: "3.x"
-      - uses: pre-commit/action@v3.0.1
diff --git a/.github/workflows/mypy.yml b/.github/workflows/mypy.yml
deleted file mode 100644
index 908daaf3a6019a..00000000000000
--- a/.github/workflows/mypy.yml
+++ /dev/null
@@ -1,67 +0,0 @@
-# Workflow to run mypy on select parts of the CPython repo
-name: mypy
-
-on:
-  push:
-    branches:
-      - main
-  pull_request:
-    paths:
-      - ".github/workflows/mypy.yml"
-      - "Lib/_colorize.py"
-      - "Lib/_pyrepl/**"
-      - "Lib/test/libregrtest/**"
-      - "Lib/tomllib/**"
-      - "Misc/mypy/**"
-      - "Tools/build/generate_sbom.py"
-      - "Tools/cases_generator/**"
-      - "Tools/clinic/**"
-      - "Tools/jit/**"
-      - "Tools/peg_generator/**"
-      - "Tools/requirements-dev.txt"
-      - "Tools/wasm/**"
-  workflow_dispatch:
-
-permissions:
-  contents: read
-
-env:
-  PIP_DISABLE_PIP_VERSION_CHECK: 1
-  FORCE_COLOR: 1
-  TERM: xterm-256color  # needed for FORCE_COLOR to work on mypy on Ubuntu, see https://github.com/python/mypy/issues/13817
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
-  cancel-in-progress: true
-
-jobs:
-  mypy:
-    name: Run mypy on ${{ matrix.target }}
-    runs-on: ubuntu-latest
-    timeout-minutes: 10
-    strategy:
-      fail-fast: false
-      matrix:
-        target: [
-          "Lib/_pyrepl",
-          "Lib/test/libregrtest",
-          "Lib/tomllib",
-          "Tools/build",
-          "Tools/cases_generator",
-          "Tools/clinic",
-          "Tools/jit",
-          "Tools/peg_generator",
-          "Tools/wasm",
-        ]
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          persist-credentials: false
-      - uses: actions/setup-python@v5
-        with:
-          python-version: "3.13"
-          cache: pip
-          cache-dependency-path: Tools/requirements-dev.txt
-      - run: pip install -r Tools/requirements-dev.txt
-      - run: python3 Misc/mypy/make_symlinks.py --symlink
-      - run: mypy --config-file ${{ matrix.target }}/mypy.ini
diff --git a/.github/workflows/new-bugs-announce-notifier.yml b/.github/workflows/new-bugs-announce-notifier.yml
deleted file mode 100644
index 9f1a8a824e5f19..00000000000000
--- a/.github/workflows/new-bugs-announce-notifier.yml
+++ /dev/null
@@ -1,60 +0,0 @@
-name: new-bugs-announce notifier
-
-on:
-  issues:
-    types:
-      - opened
-
-permissions:
-  issues: read
-
-jobs:
-  notify-new-bugs-announce:
-    runs-on: ubuntu-latest
-    timeout-minutes: 10
-    steps:
-      - uses: actions/setup-node@v4
-        with:
-          node-version: 20
-      - run: npm install mailgun.js form-data
-      - name: Send notification
-        uses: actions/github-script@v7
-        env:
-          MAILGUN_API_KEY: ${{ secrets.MAILGUN_PYTHON_ORG_MAILGUN_KEY }}
-        with:
-          script: |
-            const Mailgun = require("mailgun.js");
-            const formData = require('form-data');
-            const mailgun = new Mailgun(formData);
-            const DOMAIN = "mailgun.python.org";
-            const mg = mailgun.client({username: 'api', key: process.env.MAILGUN_API_KEY});
-            github.rest.issues.get({
-              issue_number: context.issue.number,
-              owner: context.repo.owner,
-              repo: context.repo.repo,
-            })
-            .then(function(issue) {
-              const payload = {
-                author : issue.data.user.login,
-                issue  : issue.data.number,
-                title  : issue.data.title,
-                url    : issue.data.html_url,
-                labels : issue.data.labels.map(label => { return label.name }).join(", "),
-                assignee : issue.data.assignees.map(assignee => { return assignee.login }),
-                // We need to truncate the body size, because the max size for
-                // the whole payload is 16kb. We want to be safe and assume that
-                // body can take up to ~8kb of space.
-                body   : issue.data.body.substring(0, 8000)
-              };
-
-              const data = {
-                from: "CPython Issues <github@mailgun.python.org>",
-                to: "new-bugs-announce@python.org",
-                subject: `[Issue ${issue.data.number}] ${issue.data.title}`,
-                template: "new-github-issue",
-                'o:tracking-clicks': 'no',
-                'h:X-Mailgun-Variables': JSON.stringify(payload)
-              };
-              return mg.messages.create(DOMAIN, data)
-            })
-            .then(msg => console.log(msg));
diff --git a/.github/workflows/posix-deps-apt.sh b/.github/workflows/posix-deps-apt.sh
deleted file mode 100755
index d5538cd9367ec6..00000000000000
--- a/.github/workflows/posix-deps-apt.sh
+++ /dev/null
@@ -1,26 +0,0 @@
-#!/bin/sh
-apt-get update
-
-apt-get -yq install \
-    build-essential \
-    pkg-config \
-    ccache \
-    gdb \
-    lcov \
-    libb2-dev \
-    libbz2-dev \
-    libffi-dev \
-    libgdbm-dev \
-    libgdbm-compat-dev \
-    liblzma-dev \
-    libncurses5-dev \
-    libreadline6-dev \
-    libsqlite3-dev \
-    libssl-dev \
-    lzma \
-    lzma-dev \
-    strace \
-    tk-dev \
-    uuid-dev \
-    xvfb \
-    zlib1g-dev
diff --git a/.github/workflows/project-updater.yml b/.github/workflows/project-updater.yml
deleted file mode 100644
index 1d9d637ec848a6..00000000000000
--- a/.github/workflows/project-updater.yml
+++ /dev/null
@@ -1,31 +0,0 @@
-name: Update GH projects
-
-on:
-  issues:
-    types:
-      - opened
-      - labeled
-
-permissions:
-  contents: read
-
-jobs:
-  add-to-project:
-    name: Add issues to projects
-    runs-on: ubuntu-latest
-    timeout-minutes: 10
-    strategy:
-      fail-fast: false
-      matrix:
-        include:
-          # if an issue has any of these labels, it will be added
-          # to the corresponding project
-          - { project:  2, label: "release-blocker, deferred-blocker" }
-          - { project: 32, label: sprint }
-
-    steps:
-      - uses: actions/add-to-project@v1.0.0
-        with:
-          project-url: https://github.com/orgs/python/projects/${{ matrix.project }}
-          github-token: ${{ secrets.ADD_TO_PROJECT_PAT }}
-          labeled: ${{ matrix.label }}
diff --git a/.github/workflows/regen-abidump.sh b/.github/workflows/regen-abidump.sh
deleted file mode 100644
index 251bb3857ecfcb..00000000000000
--- a/.github/workflows/regen-abidump.sh
+++ /dev/null
@@ -1,8 +0,0 @@
-set -ex
-
-export DEBIAN_FRONTEND=noninteractive
-./.github/workflows/posix-deps-apt.sh
-apt-get install -yq abigail-tools python3
-export CFLAGS="-g3 -O0"
-./configure --enable-shared && make
-make regen-abidump
diff --git a/.github/workflows/require-pr-label.yml b/.github/workflows/require-pr-label.yml
deleted file mode 100644
index 7e534c58c798d1..00000000000000
--- a/.github/workflows/require-pr-label.yml
+++ /dev/null
@@ -1,61 +0,0 @@
-name: Check labels
-
-on:
-  pull_request:
-    types: [opened, reopened, labeled, unlabeled, synchronize]
-
-jobs:
-  label-dnm:
-    name: DO-NOT-MERGE
-    if: github.repository_owner == 'python'
-    runs-on: ubuntu-latest
-    permissions:
-      pull-requests: read
-    timeout-minutes: 10
-
-    steps:
-      - name: Check there's no DO-NOT-MERGE
-        uses: mheap/github-action-required-labels@v5
-        with:
-          mode: exactly
-          count: 0
-          labels: |
-            DO-NOT-MERGE
-
-  label-reviews:
-    name: Unresolved review
-    if: github.repository_owner == 'python'
-    runs-on: ubuntu-latest
-    permissions:
-      pull-requests: read
-    timeout-minutes: 10
-
-    steps:
-      # Check that the PR is not awaiting changes from the author due to previous review.
-      - name: Check there's no required changes
-        uses: mheap/github-action-required-labels@v5
-        with:
-          mode: exactly
-          count: 0
-          labels: |
-            awaiting changes
-            awaiting change review
-      - id: is-feature
-        name: Check whether this PR is a feature (contains a "type-feature" label)
-        uses: mheap/github-action-required-labels@v5
-        with:
-          mode: exactly
-          count: 1
-          labels: |
-            type-feature
-          exit_type: success  # don't fail the check if the PR is not a feature, just record the result
-      # In case of a feature PR, check for a complete review (contains an "awaiting merge" label).
-      - id: awaiting-merge
-        if: steps.is-feature.outputs.status == 'success'
-        name: Check for complete review
-        uses: mheap/github-action-required-labels@v5
-        with:
-          mode: exactly
-          count: 1
-          labels: |
-            awaiting merge
diff --git a/.github/workflows/reusable-context.yml b/.github/workflows/reusable-context.yml
index 73e036a146f5d4..458cdc24241542 100644
--- a/.github/workflows/reusable-context.yml
+++ b/.github/workflows/reusable-context.yml
@@ -67,6 +67,20 @@ jobs:
             || ''
           }}
 
+    - run: git remote -vvv
+    - run: git -P branch -v
+    - run: git -P branch -r -v
+    - run: echo ref= ${{ github.ref }}
+    - run: echo sha= ${{ github.sha }}
+    - run: echo repository= ${{ github.repository }}
+    - run: echo event.pull_request.head.sha= ${{ github.event.pull_request.head.sha }}
+    - run: echo head_ref= ${{ github.head_ref }}
+    - run: echo base_ref= ${{ github.base_ref }}
+    - run: echo env.GITHUB_HEAD_REF= ${{ env.GITHUB_HEAD_REF }}
+    - run: echo $GITHUB_HEAD_REF
+    - run: echo $GITHUB_BASE_REF
+    - run: echo head sha or sha = ${{ github.event.pull_request.head.sha || github.sha }}
+
     # Adapted from https://github.com/actions/checkout/issues/520#issuecomment-1167205721
     - name: Fetch commits to get branch diff
       if: github.event_name == 'pull_request'
@@ -89,6 +103,8 @@ jobs:
         commits: ${{ github.event.pull_request.commits }}
         refspec_base: '+${{ github.event.pull_request.base.sha }}:remotes/origin/${{ github.event.pull_request.base.ref }}'
         refspec_pr: '+${{ github.event.pull_request.head.sha }}:remotes/origin/${{ github.event.pull_request.head.ref }}'
+    - run: git -P branch -v
+    - run: git -P branch -r -v
 
     # We only want to run tests on PRs when related files are changed,
     # or when someone triggers a manual workflow run.
@@ -97,6 +113,8 @@ jobs:
       run: python Tools/build/compute-changes.py
       env:
         GITHUB_DEFAULT_BRANCH: ${{ github.event.repository.default_branch }}
+        CCF_TARGET_REF: ${{ github.base_ref || github.event.repository.default_branch }}
+        CCF_HEAD_REF: ${{ github.event.pull_request.head.sha || github.sha }}
 
     - name: Compute hash for config cache key
       id: config-hash
diff --git a/.github/workflows/reusable-docs.yml b/.github/workflows/reusable-docs.yml
deleted file mode 100644
index 657e0a6bf662f7..00000000000000
--- a/.github/workflows/reusable-docs.yml
+++ /dev/null
@@ -1,104 +0,0 @@
-name: Reusable Docs
-
-on:
-  workflow_call:
-  workflow_dispatch:
-
-permissions:
-  contents: read
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
-  cancel-in-progress: true
-
-env:
-  FORCE_COLOR: 1
-
-jobs:
-  build-doc:
-    name: 'Docs'
-    runs-on: ubuntu-latest
-    timeout-minutes: 60
-    env:
-      branch_base: 'origin/${{ github.event.pull_request.base.ref }}'
-      branch_pr: 'origin/${{ github.event.pull_request.head.ref }}'
-      commits: ${{ github.event.pull_request.commits }}
-      refspec_base: '+${{ github.event.pull_request.base.sha }}:remotes/origin/${{ github.event.pull_request.base.ref }}'
-      refspec_pr: '+${{ github.event.pull_request.head.sha }}:remotes/origin/${{ github.event.pull_request.head.ref }}'
-    steps:
-    - name: 'Check out latest PR branch commit'
-      uses: actions/checkout@v4
-      with:
-        persist-credentials: false
-        ref: >-
-          ${{
-            github.event_name == 'pull_request'
-            && github.event.pull_request.head.sha
-            || ''
-          }}
-    # Adapted from https://github.com/actions/checkout/issues/520#issuecomment-1167205721
-    - name: 'Fetch commits to get branch diff'
-      if: github.event_name == 'pull_request'
-      run: |
-        # Fetch enough history to find a common ancestor commit (aka merge-base):
-        git fetch origin "${refspec_pr}" --depth=$(( commits + 1 )) \
-          --no-tags --prune --no-recurse-submodules
-
-        # This should get the oldest commit in the local fetched history (which may not be the commit the PR branched from):
-        COMMON_ANCESTOR=$( git rev-list --first-parent --max-parents=0 --max-count=1 "${branch_pr}" )
-        DATE=$( git log --date=iso8601 --format=%cd "${COMMON_ANCESTOR}" )
-
-        # Get all commits since that commit date from the base branch (eg: master or main):
-        git fetch origin "${refspec_base}" --shallow-since="${DATE}" \
-          --no-tags --prune --no-recurse-submodules
-    - name: 'Set up Python'
-      uses: actions/setup-python@v5
-      with:
-        python-version: '3'
-        cache: 'pip'
-        cache-dependency-path: 'Doc/requirements.txt'
-    - name: 'Install build dependencies'
-      run: make -C Doc/ venv
-
-    # To annotate PRs with Sphinx nitpicks (missing references)
-    - name: 'Build HTML documentation'
-      continue-on-error: true
-      run: |
-        set -Eeuo pipefail
-        # Build docs with the nit-picky option; write warnings to file
-        make -C Doc/ PYTHON=../python SPHINXOPTS="--quiet --nitpicky --fail-on-warning --warning-file sphinx-warnings.txt" html
-    - name: 'Check warnings'
-      if: github.event_name == 'pull_request'
-      run: |
-        python Doc/tools/check-warnings.py \
-          --annotate-diff "${branch_base}" "${branch_pr}" \
-          --fail-if-regression \
-          --fail-if-improved \
-          --fail-if-new-news-nit
-
-  # Run "doctest" on HEAD as new syntax doesn't exist in the latest stable release
-  doctest:
-    name: 'Doctest'
-    runs-on: ubuntu-24.04
-    timeout-minutes: 60
-    steps:
-    - uses: actions/checkout@v4
-      with:
-        persist-credentials: false
-    - uses: actions/cache@v4
-      with:
-        path: ~/.cache/pip
-        key: ubuntu-doc-${{ hashFiles('Doc/requirements.txt') }}
-        restore-keys: |
-          ubuntu-doc-
-    - name: 'Install Dependencies'
-      run: sudo ./.github/workflows/posix-deps-apt.sh && sudo apt-get install wamerican
-    - name: 'Configure CPython'
-      run: ./configure --with-pydebug
-    - name: 'Build CPython'
-      run: make -j4
-    - name: 'Install build dependencies'
-      run: make -C Doc/ PYTHON=../python venv
-    # Use "xvfb-run" since some doctest tests open GUI windows
-    - name: 'Run documentation doctest'
-      run: xvfb-run make -C Doc/ PYTHON=../python SPHINXERRORHANDLING="--fail-on-warning" doctest
diff --git a/.github/workflows/reusable-macos.yml b/.github/workflows/reusable-macos.yml
deleted file mode 100644
index de0c40221364ad..00000000000000
--- a/.github/workflows/reusable-macos.yml
+++ /dev/null
@@ -1,81 +0,0 @@
-name: Reusable macOS
-
-on:
-  workflow_call:
-    inputs:
-      config_hash:
-        required: true
-        type: string
-      free-threading:
-        required: false
-        type: boolean
-        default: false
-      os:
-        description: OS to run the job
-        required: true
-        type: string
-
-env:
-  FORCE_COLOR: 1
-
-jobs:
-  build-macos:
-    name: build and test (${{ inputs.os }})
-    runs-on: ${{ inputs.os }}
-    timeout-minutes: 60
-    env:
-      HOMEBREW_NO_ANALYTICS: 1
-      HOMEBREW_NO_AUTO_UPDATE: 1
-      HOMEBREW_NO_INSTALL_CLEANUP: 1
-      HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK: 1
-      PYTHONSTRICTEXTENSIONBUILD: 1
-      TERM: linux
-    steps:
-    - uses: actions/checkout@v4
-      with:
-        persist-credentials: false
-    - name: Runner image version
-      run: echo "IMAGE_OS_VERSION=${ImageOS}-${ImageVersion}" >> "$GITHUB_ENV"
-    - name: Restore config.cache
-      uses: actions/cache@v4
-      with:
-        path: config.cache
-        key: ${{ github.job }}-${{ env.IMAGE_OS_VERSION }}-${{ inputs.config_hash }}
-    - name: Install Homebrew dependencies
-      run: |
-        brew install pkg-config openssl@3.0 xz gdbm tcl-tk@8 make
-        # Because alternate versions are not symlinked into place by default:
-        brew link --overwrite tcl-tk@8
-    - name: Configure CPython
-      run: |
-        MACOSX_DEPLOYMENT_TARGET=10.15 \
-        GDBM_CFLAGS="-I$(brew --prefix gdbm)/include" \
-        GDBM_LIBS="-L$(brew --prefix gdbm)/lib -lgdbm" \
-        ./configure \
-          --config-cache \
-          --with-pydebug \
-          --enable-slower-safety \
-          --enable-safety \
-          ${{ inputs.free-threading && '--disable-gil' || '' }} \
-          --prefix=/opt/python-dev \
-          --with-openssl="$(brew --prefix openssl@3.0)"
-    - name: Build CPython
-      if : ${{ inputs.free-threading || inputs.os != 'macos-13' }}
-      run: gmake -j8
-    - name: Build CPython for compiler warning check
-      if : ${{ !inputs.free-threading && inputs.os == 'macos-13' }}
-      run: set -o pipefail; gmake -j8 --output-sync 2>&1 | tee compiler_output_macos.txt
-    - name: Display build info
-      run: make pythoninfo
-    - name: Check compiler warnings
-      if : ${{ !inputs.free-threading && inputs.os == 'macos-13' }}
-      run: >-
-        python3 Tools/build/check_warnings.py
-        --compiler-output-file-path=compiler_output_macos.txt
-        --warning-ignore-file-path=Tools/build/.warningignore_macos
-        --compiler-output-type=clang
-        --fail-on-regression
-        --fail-on-improvement
-        --path-prefix="./"
-    - name: Tests
-      run: make ci
diff --git a/.github/workflows/reusable-tsan.yml b/.github/workflows/reusable-tsan.yml
deleted file mode 100644
index 6a58e5305f8e09..00000000000000
--- a/.github/workflows/reusable-tsan.yml
+++ /dev/null
@@ -1,94 +0,0 @@
-name: Reusable Thread Sanitizer
-
-on:
-  workflow_call:
-    inputs:
-      config_hash:
-        required: true
-        type: string
-      free-threading:
-        description: Whether to use free-threaded mode
-        required: false
-        type: boolean
-        default: false
-
-env:
-  FORCE_COLOR: 1
-
-jobs:
-  build-tsan-reusable:
-    name: 'Thread sanitizer'
-    runs-on: ubuntu-24.04
-    timeout-minutes: 60
-    steps:
-    - uses: actions/checkout@v4
-      with:
-        persist-credentials: false
-    - name: Runner image version
-      run: echo "IMAGE_OS_VERSION=${ImageOS}-${ImageVersion}" >> "$GITHUB_ENV"
-    - name: Restore config.cache
-      uses: actions/cache@v4
-      with:
-        path: config.cache
-        key: ${{ github.job }}-${{ env.IMAGE_OS_VERSION }}-${{ inputs.config_hash }}
-    - name: Install dependencies
-      run: |
-        sudo ./.github/workflows/posix-deps-apt.sh
-        # Install clang-18
-        wget https://apt.llvm.org/llvm.sh
-        chmod +x llvm.sh
-        sudo ./llvm.sh 17  # gh-121946: llvm-18 package is temporarily broken
-        sudo update-alternatives --install /usr/bin/clang clang /usr/bin/clang-17 100
-        sudo update-alternatives --set clang /usr/bin/clang-17
-        sudo update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-17 100
-        sudo update-alternatives --set clang++ /usr/bin/clang++-17
-        # Reduce ASLR to avoid TSAN crashing
-        sudo sysctl -w vm.mmap_rnd_bits=28
-    - name: TSAN option setup
-      run: |
-        echo "TSAN_OPTIONS=log_path=${GITHUB_WORKSPACE}/tsan_log suppressions=${GITHUB_WORKSPACE}/Tools/tsan/suppressions${{
-            fromJSON(inputs.free-threading)
-            && '_free_threading'
-            || ''
-          }}.txt handle_segv=0" >> "$GITHUB_ENV"
-        echo "CC=clang" >> "$GITHUB_ENV"
-        echo "CXX=clang++" >> "$GITHUB_ENV"
-    - name: Add ccache to PATH
-      run: |
-        echo "PATH=/usr/lib/ccache:$PATH" >> "$GITHUB_ENV"
-    - name: Configure ccache action
-      uses: hendrikmuhs/ccache-action@v1.2
-      with:
-        save: ${{ github.event_name == 'push' }}
-        max-size: "200M"
-    - name: Configure CPython
-      run: >-
-        ./configure
-        --config-cache
-        --with-thread-sanitizer
-        --with-pydebug
-        ${{ fromJSON(inputs.free-threading) && '--disable-gil' || '' }}
-    - name: Build CPython
-      run: make -j4
-    - name: Display build info
-      run: make pythoninfo
-    - name: Tests
-      run: ./python -m test --tsan -j4
-    - name: Parallel tests
-      if: fromJSON(inputs.free-threading)
-      run: ./python -m test --tsan-parallel --parallel-threads=4 -j4
-    - name: Display TSAN logs
-      if: always()
-      run: find "${GITHUB_WORKSPACE}" -name 'tsan_log.*' | xargs head -n 1000
-    - name: Archive TSAN logs
-      if: always()
-      uses: actions/upload-artifact@v4
-      with:
-        name: >-
-          tsan-logs-${{
-            fromJSON(inputs.free-threading)
-            && 'free-threading'
-            || 'default'
-          }}
-        path: tsan_log.*
-        if-no-files-found: ignore
diff --git a/.github/workflows/reusable-ubuntu.yml b/.github/workflows/reusable-ubuntu.yml
deleted file mode 100644
index 76b19fd5d1a72e..00000000000000
--- a/.github/workflows/reusable-ubuntu.yml
+++ /dev/null
@@ -1,127 +0,0 @@
-name: Reusable Ubuntu
-
-on:
-  workflow_call:
-    inputs:
-      config_hash:
-        required: true
-        type: string
-      bolt-optimizations:
-        description: Whether to enable BOLT optimizations
-        required: false
-        type: boolean
-        default: false
-      free-threading:
-        description: Whether to use free-threaded mode
-        required: false
-        type: boolean
-        default: false
-      os:
-         description: OS to run the job
-         required: true
-         type: string
-
-env:
-  FORCE_COLOR: 1
-
-jobs:
-  build-ubuntu-reusable:
-    name: build and test (${{ inputs.os }})
-    runs-on: ${{ inputs.os }}
-    timeout-minutes: 60
-    env:
-      OPENSSL_VER: 3.0.15
-      PYTHONSTRICTEXTENSIONBUILD: 1
-      TERM: linux
-    steps:
-    - uses: actions/checkout@v4
-      with:
-        persist-credentials: false
-    - name: Register gcc problem matcher
-      run: echo "::add-matcher::.github/problem-matchers/gcc.json"
-    - name: Install dependencies
-      run: sudo ./.github/workflows/posix-deps-apt.sh
-    - name: Install Clang and BOLT
-      if: ${{ fromJSON(inputs.bolt-optimizations) }}
-      run: |
-        sudo bash -c "$(wget -O - https://apt.llvm.org/llvm.sh)" ./llvm.sh 19
-        sudo apt-get install bolt-19
-        echo PATH="$(llvm-config-19 --bindir):$PATH" >> $GITHUB_ENV
-    - name: Configure OpenSSL env vars
-      run: |
-        echo "MULTISSL_DIR=${GITHUB_WORKSPACE}/multissl" >> "$GITHUB_ENV"
-        echo "OPENSSL_DIR=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}" >> "$GITHUB_ENV"
-        echo "LD_LIBRARY_PATH=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}/lib" >> "$GITHUB_ENV"
-    - name: 'Restore OpenSSL build'
-      id: cache-openssl
-      uses: actions/cache@v4
-      with:
-        path: ./multissl/openssl/${{ env.OPENSSL_VER }}
-        key: ${{ inputs.os }}-multissl-openssl-${{ env.OPENSSL_VER }}
-    - name: Install OpenSSL
-      if: steps.cache-openssl.outputs.cache-hit != 'true'
-      run: python3 Tools/ssl/multissltests.py --steps=library --base-directory "$MULTISSL_DIR" --openssl "$OPENSSL_VER" --system Linux
-    - name: Add ccache to PATH
-      run: |
-        echo "PATH=/usr/lib/ccache:$PATH" >> "$GITHUB_ENV"
-    - name: Configure ccache action
-      uses: hendrikmuhs/ccache-action@v1.2
-      with:
-        save: ${{ github.event_name == 'push' }}
-        max-size: "200M"
-    - name: Setup directory envs for out-of-tree builds
-      run: |
-        echo "CPYTHON_RO_SRCDIR=$(realpath -m "${GITHUB_WORKSPACE}"/../cpython-ro-srcdir)" >> "$GITHUB_ENV"
-        echo "CPYTHON_BUILDDIR=$(realpath -m "${GITHUB_WORKSPACE}"/../cpython-builddir)" >> "$GITHUB_ENV"
-    - name: Create directories for read-only out-of-tree builds
-      run: mkdir -p "$CPYTHON_RO_SRCDIR" "$CPYTHON_BUILDDIR"
-    - name: Bind mount sources read-only
-      run: sudo mount --bind -o ro "$GITHUB_WORKSPACE" "$CPYTHON_RO_SRCDIR"
-    - name: Runner image version
-      run: echo "IMAGE_OS_VERSION=${ImageOS}-${ImageVersion}" >> "$GITHUB_ENV"
-    - name: Restore config.cache
-      uses: actions/cache@v4
-      with:
-        path: ${{ env.CPYTHON_BUILDDIR }}/config.cache
-        key: ${{ github.job }}-${{ env.IMAGE_OS_VERSION }}-${{ inputs.config_hash }}
-    - name: Configure CPython out-of-tree
-      working-directory: ${{ env.CPYTHON_BUILDDIR }}
-      # `test_unpickle_module_race` writes to the source directory, which is
-      # read-only during builds — so we exclude it from profiling with BOLT.
-      run: >-
-        PROFILE_TASK='-m test --pgo --ignore test_unpickle_module_race'
-        ../cpython-ro-srcdir/configure
-        --config-cache
-        --with-pydebug
-        --enable-slower-safety
-        --enable-safety
-        --with-openssl="$OPENSSL_DIR"
-        ${{ fromJSON(inputs.free-threading) && '--disable-gil' || '' }}
-        ${{ fromJSON(inputs.bolt-optimizations) && '--enable-bolt' || '' }}
-    - name: Build CPython out-of-tree
-      if: ${{ inputs.free-threading }}
-      working-directory: ${{ env.CPYTHON_BUILDDIR }}
-      run: make -j
-    - name: Build CPython out-of-tree (for compiler warning check)
-      if: ${{ !inputs.free-threading }}
-      working-directory: ${{ env.CPYTHON_BUILDDIR }}
-      run: set -o pipefail; make -j --output-sync 2>&1 | tee compiler_output_ubuntu.txt
-    - name: Display build info
-      working-directory: ${{ env.CPYTHON_BUILDDIR }}
-      run: make pythoninfo
-    - name: Check compiler warnings
-      if: ${{ !inputs.free-threading }}
-      run: >-
-        python Tools/build/check_warnings.py
-        --compiler-output-file-path="${CPYTHON_BUILDDIR}/compiler_output_ubuntu.txt"
-        --warning-ignore-file-path "${GITHUB_WORKSPACE}/Tools/build/.warningignore_ubuntu"
-        --compiler-output-type=gcc
-        --fail-on-regression
-        --fail-on-improvement
-        --path-prefix="../cpython-ro-srcdir/"
-    - name: Remount sources writable for tests
-      # some tests write to srcdir, lack of pyc files slows down testing
-      run: sudo mount "$CPYTHON_RO_SRCDIR" -oremount,rw
-    - name: Tests
-      working-directory: ${{ env.CPYTHON_BUILDDIR }}
-      run: xvfb-run make ci
diff --git a/.github/workflows/reusable-wasi.yml b/.github/workflows/reusable-wasi.yml
deleted file mode 100644
index 6beb91e66d4027..00000000000000
--- a/.github/workflows/reusable-wasi.yml
+++ /dev/null
@@ -1,84 +0,0 @@
-name: Reusable WASI
-
-on:
-  workflow_call:
-    inputs:
-      config_hash:
-        required: true
-        type: string
-
-env:
-  FORCE_COLOR: 1
-
-jobs:
-  build-wasi-reusable:
-    name: 'build and test'
-    runs-on: ubuntu-24.04
-    timeout-minutes: 60
-    env:
-      WASMTIME_VERSION: 22.0.0
-      WASI_SDK_VERSION: 24
-      WASI_SDK_PATH: /opt/wasi-sdk
-      CROSS_BUILD_PYTHON: cross-build/build
-      CROSS_BUILD_WASI: cross-build/wasm32-wasip1
-    steps:
-    - uses: actions/checkout@v4
-      with:
-        persist-credentials: false
-    # No problem resolver registered as one doesn't currently exist for Clang.
-    - name: "Install wasmtime"
-      uses: bytecodealliance/actions/wasmtime/setup@v1
-      with:
-        version: ${{ env.WASMTIME_VERSION }}
-    - name: "Restore WASI SDK"
-      id: cache-wasi-sdk
-      uses: actions/cache@v4
-      with:
-        path: ${{ env.WASI_SDK_PATH }}
-        key: ${{ runner.os }}-wasi-sdk-${{ env.WASI_SDK_VERSION }}
-    - name: "Install WASI SDK"  # Hard-coded to x64.
-      if: steps.cache-wasi-sdk.outputs.cache-hit != 'true'
-      run: |
-        mkdir "${WASI_SDK_PATH}" && \
-        curl -s -S --location "https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-${WASI_SDK_VERSION}/wasi-sdk-${WASI_SDK_VERSION}.0-x86_64-linux.tar.gz" | \
-        tar --strip-components 1 --directory "${WASI_SDK_PATH}" --extract --gunzip
-    - name: "Configure ccache action"
-      uses: hendrikmuhs/ccache-action@v1.2
-      with:
-        save: ${{ github.event_name == 'push' }}
-        max-size: "200M"
-    - name: "Add ccache to PATH"
-      run: echo "PATH=/usr/lib/ccache:$PATH" >> "$GITHUB_ENV"
-    - name: "Install Python"
-      uses: actions/setup-python@v5
-      with:
-        python-version: '3.x'
-    - name: "Runner image version"
-      run: echo "IMAGE_OS_VERSION=${ImageOS}-${ImageVersion}" >> "$GITHUB_ENV"
-    - name: "Restore Python build config.cache"
-      uses: actions/cache@v4
-      with:
-        path: ${{ env.CROSS_BUILD_PYTHON }}/config.cache
-        # Include env.pythonLocation in key to avoid changes in environment when setup-python updates Python.
-        # Include the hash of `Tools/wasm/wasi.py` as it may change the environment variables.
-        # (Make sure to keep the key in sync with the other config.cache step below.)
-        key: ${{ github.job }}-${{ env.IMAGE_OS_VERSION }}-${{ env.WASI_SDK_VERSION }}-${{ env.WASMTIME_VERSION }}-${{ inputs.config_hash }}-${{ hashFiles('Tools/wasm/wasi.py') }}-${{ env.pythonLocation }}
-    - name: "Configure build Python"
-      run: python3 Tools/wasm/wasi.py configure-build-python -- --config-cache --with-pydebug
-    - name: "Make build Python"
-      run: python3 Tools/wasm/wasi.py make-build-python
-    - name: "Restore host config.cache"
-      uses: actions/cache@v4
-      with:
-        path: ${{ env.CROSS_BUILD_WASI }}/config.cache
-        # Should be kept in sync with the other config.cache step above.
-        key: ${{ github.job }}-${{ env.IMAGE_OS_VERSION }}-${{ env.WASI_SDK_VERSION }}-${{ env.WASMTIME_VERSION }}-${{ inputs.config_hash }}-${{ hashFiles('Tools/wasm/wasi.py') }}-${{ env.pythonLocation }}
-    - name: "Configure host"
-      # `--with-pydebug` inferred from configure-build-python
-      run: python3 Tools/wasm/wasi.py configure-host -- --config-cache
-    - name: "Make host"
-      run: python3 Tools/wasm/wasi.py make-host
-    - name: "Display build info"
-      run: make --directory "${CROSS_BUILD_WASI}" pythoninfo
-    - name: "Test"
-      run: make --directory "${CROSS_BUILD_WASI}" test
diff --git a/.github/workflows/reusable-windows-msi.yml b/.github/workflows/reusable-windows-msi.yml
deleted file mode 100644
index a50de344bba4da..00000000000000
--- a/.github/workflows/reusable-windows-msi.yml
+++ /dev/null
@@ -1,31 +0,0 @@
-name: Reusable Windows MSI
-
-on:
-  workflow_call:
-    inputs:
-      arch:
-        description: CPU architecture
-        required: true
-        type: string
-
-permissions:
-  contents: read
-
-env:
-  FORCE_COLOR: 1
-
-jobs:
-  build:
-    name: installer for ${{ inputs.arch }}
-    runs-on: ${{ inputs.arch == 'arm64' && 'windows-11-arm' || 'windows-latest' }}
-    timeout-minutes: 60
-    env:
-      ARCH: ${{ inputs.arch }}
-      IncludeFreethreaded: true
-    steps:
-    - uses: actions/checkout@v4
-      with:
-        persist-credentials: false
-    - name: Build CPython installer
-      run: ./Tools/msi/build.bat --doc -"${ARCH}"
-      shell: bash
diff --git a/.github/workflows/reusable-windows.yml b/.github/workflows/reusable-windows.yml
deleted file mode 100644
index 37c802095b0f2f..00000000000000
--- a/.github/workflows/reusable-windows.yml
+++ /dev/null
@@ -1,50 +0,0 @@
-name: Reusable Windows
-
-on:
-  workflow_call:
-    inputs:
-      arch:
-        description: CPU architecture
-        required: true
-        type: string
-      free-threading:
-        description: Whether to compile CPython in free-threading mode
-        required: false
-        type: boolean
-        default: false
-
-env:
-  FORCE_COLOR: 1
-  IncludeUwp: >-
-    true
-
-jobs:
-  build:
-    name: Build and test (${{ inputs.arch }})
-    runs-on: ${{ inputs.arch == 'arm64' && 'windows-11-arm' || 'windows-latest' }}
-    timeout-minutes: 60
-    env:
-      ARCH: ${{ inputs.arch }}
-    steps:
-    - uses: actions/checkout@v4
-      with:
-        persist-credentials: false
-    - name: Register MSVC problem matcher
-      if: inputs.arch != 'Win32'
-      run: echo "::add-matcher::.github/problem-matchers/msvc.json"
-    - name: Build CPython
-      run: >-
-        .\\PCbuild\\build.bat
-        -e -d -v
-        -p "${ARCH}"
-        ${{ fromJSON(inputs.free-threading) && '--disable-gil' || '' }}
-      shell: bash
-    - name: Display build info
-      run: .\\python.bat -m test.pythoninfo
-    - name: Tests
-      run: >-
-        .\\PCbuild\\rt.bat
-        -p "${ARCH}"
-        -d -q --fast-ci
-        ${{ fromJSON(inputs.free-threading) && '--disable-gil' || '' }}
-      shell: bash
diff --git a/.github/workflows/stale.yml b/.github/workflows/stale.yml
deleted file mode 100644
index febb2dd823a8fe..00000000000000
--- a/.github/workflows/stale.yml
+++ /dev/null
@@ -1,26 +0,0 @@
-name: Mark stale pull requests
-
-on:
-  schedule:
-  - cron: "0 */6 * * *"
-
-jobs:
-  stale:
-    if: github.repository_owner == 'python'
-    runs-on: ubuntu-latest
-    permissions:
-      pull-requests: write
-    timeout-minutes: 10
-
-    steps:
-    - name: "Check PRs"
-      uses: actions/stale@v9
-      with:
-        repo-token: ${{ secrets.GITHUB_TOKEN }}
-        stale-pr-message: 'This PR is stale because it has been open for 30 days with no activity.'
-        stale-pr-label: 'stale'
-        days-before-issue-stale: -1
-        days-before-pr-stale: 30
-        days-before-close: -1
-        ascending: true
-        operations-per-run: 120
diff --git a/.github/workflows/tail-call.yml b/.github/workflows/tail-call.yml
deleted file mode 100644
index 4636372e26c41b..00000000000000
--- a/.github/workflows/tail-call.yml
+++ /dev/null
@@ -1,140 +0,0 @@
-name: Tail calling interpreter
-on:
-  pull_request:
-    paths:
-      - '.github/workflows/tail-call.yml'
-      - 'Python/bytecodes.c'
-      - 'Python/ceval.c'
-      - 'Python/ceval_macros.h'
-      - 'Python/generated_cases.c.h'
-  push:
-    paths:
-      - '.github/workflows/tail-call.yml'
-      - 'Python/bytecodes.c'
-      - 'Python/ceval.c'
-      - 'Python/ceval_macros.h'
-      - 'Python/generated_cases.c.h'
-  workflow_dispatch:
-
-permissions:
-  contents: read
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
-  cancel-in-progress: true
-
-env:
-  FORCE_COLOR: 1
-
-jobs:
-  tail-call:
-    name: ${{ matrix.target }}
-    runs-on: ${{ matrix.runner }}
-    timeout-minutes: 90
-    strategy:
-      fail-fast: false
-      matrix:
-        target:
-# Un-comment as we add support for more platforms for tail-calling interpreters.
-#          - i686-pc-windows-msvc/msvc
-          - x86_64-pc-windows-msvc/msvc
-#          - aarch64-pc-windows-msvc/msvc
-          - x86_64-apple-darwin/clang
-          - aarch64-apple-darwin/clang
-          - x86_64-unknown-linux-gnu/gcc
-          - aarch64-unknown-linux-gnu/gcc
-          - free-threading
-        llvm:
-          - 20
-        include:
-#          - target: i686-pc-windows-msvc/msvc
-#            architecture: Win32
-#            runner: windows-latest
-          - target: x86_64-pc-windows-msvc/msvc
-            architecture: x64
-            runner: windows-latest
-#          - target: aarch64-pc-windows-msvc/msvc
-#            architecture: ARM64
-#            runner: windows-latest
-          - target: x86_64-apple-darwin/clang
-            architecture: x86_64
-            runner: macos-13
-          - target: aarch64-apple-darwin/clang
-            architecture: aarch64
-            runner: macos-14
-          - target: x86_64-unknown-linux-gnu/gcc
-            architecture: x86_64
-            runner: ubuntu-24.04
-          - target: aarch64-unknown-linux-gnu/gcc
-            architecture: aarch64
-            runner: ubuntu-24.04-arm
-          - target: free-threading
-            architecture: x86_64
-            runner: ubuntu-24.04
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          persist-credentials: false
-      - uses: actions/setup-python@v5
-        with:
-          python-version: '3.11'
-
-      - name: Native Windows (debug)
-        if: runner.os == 'Windows' && matrix.architecture != 'ARM64'
-        shell: cmd
-        run: |
-          choco install llvm --allow-downgrade --no-progress --version ${{ matrix.llvm }}.1.0
-          set PlatformToolset=clangcl
-          set LLVMToolsVersion=${{ matrix.llvm }}.1.0
-          set LLVMInstallDir=C:\Program Files\LLVM
-          call ./PCbuild/build.bat --tail-call-interp -d -p ${{ matrix.architecture }}
-          call ./PCbuild/rt.bat -d -p ${{ matrix.architecture }} -q --multiprocess 0 --timeout 4500 --verbose2 --verbose3
-
-      # No tests (yet):
-      - name: Emulated Windows (release)
-        if: runner.os == 'Windows' && matrix.architecture == 'ARM64'
-        shell: cmd
-        run: |
-          choco install llvm --allow-downgrade --no-progress --version ${{ matrix.llvm }}.1.0
-          set PlatformToolset=clangcl
-          set LLVMToolsVersion=${{ matrix.llvm }}.1.0
-          set LLVMInstallDir=C:\Program Files\LLVM
-          ./PCbuild/build.bat --tail-call-interp -p ${{ matrix.architecture }}
-
-        # The `find` line is required as a result of https://github.com/actions/runner-images/issues/9966.
-        # This is a bug in the macOS runner image where the pre-installed Python is installed in the same
-        # directory as the Homebrew Python, which causes the build to fail for macos-13. This line removes
-        # the symlink to the pre-installed Python so that the Homebrew Python is used instead.
-        # Note: when a new LLVM is released, the homebrew installation directory changes, so the builds will fail.
-        # We either need to upgrade LLVM or change the directory being pointed to.
-      - name: Native macOS (release)
-        if: runner.os == 'macOS'
-        run: |
-          brew update
-          find /usr/local/bin -lname '*/Library/Frameworks/Python.framework/*' -delete
-          brew install llvm@${{ matrix.llvm }}
-          export SDKROOT="$(xcrun --show-sdk-path)"
-          export PATH="/usr/local/opt/llvm/bin:$PATH"
-          export PATH="/opt/homebrew/opt/llvm/bin:$PATH"
-          CC=clang-20 ./configure --with-tail-call-interp
-          make all --jobs 4
-          ./python.exe -m test --multiprocess 0 --timeout 4500 --verbose2 --verbose3
-
-      - name: Native Linux (debug)
-        if: runner.os == 'Linux' && matrix.target != 'free-threading'
-        run: |
-          sudo bash -c "$(wget -O - https://apt.llvm.org/llvm.sh)" ./llvm.sh ${{ matrix.llvm }}
-          export PATH="$(llvm-config-${{ matrix.llvm }} --bindir):$PATH"
-          CC=clang-20 ./configure --with-tail-call-interp --with-pydebug
-          make all --jobs 4
-          ./python -m test --multiprocess 0 --timeout 4500 --verbose2 --verbose3
-
-      - name: Native Linux with free-threading (release)
-        if: matrix.target == 'free-threading'
-        run: |
-          sudo bash -c "$(wget -O - https://apt.llvm.org/llvm.sh)" ./llvm.sh ${{ matrix.llvm }}
-          export PATH="$(llvm-config-${{ matrix.llvm }} --bindir):$PATH"
-          CC=clang-20 ./configure --with-tail-call-interp --disable-gil
-          make all --jobs 4
-          ./python -m test --multiprocess 0 --timeout 4500 --verbose2 --verbose3
-
diff --git a/.github/workflows/verify-ensurepip-wheels.yml b/.github/workflows/verify-ensurepip-wheels.yml
deleted file mode 100644
index 463e7bf3355cc3..00000000000000
--- a/.github/workflows/verify-ensurepip-wheels.yml
+++ /dev/null
@@ -1,35 +0,0 @@
-name: Verify bundled wheels
-
-on:
-  workflow_dispatch:
-  push:
-    paths:
-      - 'Lib/ensurepip/_bundled/**'
-      - '.github/workflows/verify-ensurepip-wheels.yml'
-      - 'Tools/build/verify_ensurepip_wheels.py'
-  pull_request:
-    paths:
-      - 'Lib/ensurepip/_bundled/**'
-      - '.github/workflows/verify-ensurepip-wheels.yml'
-      - 'Tools/build/verify_ensurepip_wheels.py'
-
-permissions:
-  contents: read
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
-  cancel-in-progress: true
-
-jobs:
-  verify:
-    runs-on: ubuntu-latest
-    timeout-minutes: 10
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          persist-credentials: false
-      - uses: actions/setup-python@v5
-        with:
-          python-version: '3'
-      - name: Compare checksum of bundled wheels to the ones published on PyPI
-        run: ./Tools/build/verify_ensurepip_wheels.py
diff --git a/Tools/build/compute-changes.py b/Tools/build/compute-changes.py
index b3be7df2dba6d0..dd521bd1b998ac 100644
--- a/Tools/build/compute-changes.py
+++ b/Tools/build/compute-changes.py
@@ -59,9 +59,7 @@ def compute_changes() -> None:
     target_branch, head_branch = git_branches()
     if target_branch and head_branch:
         # Getting changed files only makes sense on a pull request
-        files = get_changed_files(
-            f"origin/{target_branch}", f"origin/{head_branch}"
-        )
+        files = get_changed_files(target_branch, head_branch)
         outputs = process_changed_files(files)
     else:
         # Otherwise, just run the tests
@@ -90,14 +88,14 @@ def compute_changes() -> None:
 
 
 def git_branches() -> tuple[str, str]:
-    target_branch = os.environ.get("GITHUB_BASE_REF", "")
-    target_branch = target_branch.removeprefix("refs/heads/")
-    print(f"target branch: {target_branch!r}")
+    target_ref = os.environ.get("CCF_TARGET_REF", "")
+    target_ref = target_ref.removeprefix("refs/heads/")
+    print(f"target ref: {target_ref!r}")
 
-    head_branch = os.environ.get("GITHUB_HEAD_REF", "")
-    head_branch = head_branch.removeprefix("refs/heads/")
-    print(f"head branch: {head_branch!r}")
-    return target_branch, head_branch
+    head_ref = os.environ.get("CCF_HEAD_REF", "")
+    head_ref = head_ref.removeprefix("refs/heads/")
+    print(f"head ref: {head_ref!r}")
+    return f"origin/{target_ref}", head_ref
 
 
 def get_changed_files(
@@ -109,6 +107,11 @@ def get_changed_files(
     changed_files_result = subprocess.run(
         args, stdout=subprocess.PIPE, check=True, encoding="utf-8"
     )
+    print()
+    print()
+    print(changed_files_result.stdout.strip())
+    print()
+    print()
     changed_files = changed_files_result.stdout.strip().splitlines()
     return frozenset(map(Path, filter(None, map(str.strip, changed_files))))