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From: Nazir Bilal Yavuz <[email protected]>
To: Jelte Fennema-Nio <[email protected]>
Cc: Andres Freund <[email protected]>
Cc: Thomas Munro <[email protected]>
Cc: [email protected]
Subject: Re: Heads Up: cirrus-ci is shutting down June 1st
Date: Tue, 19 May 2026 01:27:52 +0300
Message-ID: <CAN55FZ30Np67cATsqYxF1SsP598VoRv4hJQZ4w9RA3Qe55prnQ@mail.gmail.com> (raw)
In-Reply-To: <[email protected]>
References: <3ydjipcr7kbss57nvi67noplncqhesl5eyb6wgol4ccjxynspv@yatlykpribmm>
	<[email protected]>

Hi,

On Tue, 19 May 2026 at 00:22, Jelte Fennema-Nio <[email protected]> wrote:
>
> On Thu, 9 Apr 2026 at 22:55, Andres Freund <[email protected]> wrote:
> > https://cirruslabs.org/ burries the lede a bit, but it has further down:
> >   "Cirrus CI will shut down effective Monday, June 1, 2026."
>
> June 1st is getting really close. *In less than two weeks we won't have
> a working CI anymore*. Effectively that's probably one week of calendar
> dev time that's left, because almost everyone is at PGConf.dev right
> now.
>
> So today I decided to take a stab at an initial GitHub Actions yaml
> file, as that seemed like the only viable option within that timeline.
> Note: Claude Code wrote this file entirely, following extensive
> back-and-forth with me after repeatadly getting red builds due to some
> differences between Cirrus and Github Actions.

Thank you for working on this!

> But finally, I managed to get a green build for all systems that we
> support on Cirrus CI!
>
> IMPORTANT CONTEXT: I only did a cursory review of the workflow file that
> Claude created. So there's probably still a bunch of cleanup to do, but
> I at least wanted to share this initial base. I don't know if I'll have
> any more time to work on this before June 1st. I have a newborn that's
> taking up a lot of my spare time. So, I'd be very happy if someone else
> wants to take this patch over and get it to a committable state.

I am actually working on the same thing and I was about to create a
new thread, I am glad that I checked my emails before doing that. I
can take this patch and move forward.

I am attaching my WIP version for visibility. My version doesn't have
BSD operating systems and uses Ubuntu instead of Debian. I didn't know
that containers can be used like you did. Another difference between
our versions is that mine has helper scripts to call things like
installing dependencies, configure, build and test. I did it that way
as we can use these helper scripts for other CI providers in the
future.

I think we can merge these two patches and move forward that way. I am
planning to review your patch and see what I can come up with to get
it to a committable state.

> A few things (apart from more extensive review) that I think should be
> improved soon (but maybe not before the first commit):
> 1. io_uring support is disabled. I couldn't get it to work on the GitHub
>    Actions runners, I think it's disabled in the host kernel. @Andres

I managed to get it to work. I think it was due to memlock and I
solved it by running this command: 'sudo prlimit --pid $$
--memlock=unlimited:unlimited' before running the tests.

> 2. It's not using pre-built images at the moment, except for the Linux
>    docker images I think. So it re-downloads a bunch of dependencies for
>    every build for most OSes. @Bilal or @Andres

Yes, that is a problem and needs to be handled separately.

One other problem is the logs. Github Actions' logs are not public,
you need to sign in to see them. I think we can solve them by
uploading logs to the public when the task fails but perhaps that can
be handled afterwards.

--
Regards,
Nazir Bilal Yavuz
Microsoft


Attachments:

  [application/octet-stream] v1-0001-nbyavuz-Add-Github-Actions-as-CI-provider.patch (45.6K, 2-v1-0001-nbyavuz-Add-Github-Actions-as-CI-provider.patch)
  download | inline diff:
From fb877cdd7ed13cb41376049fadcf19f84a27094f Mon Sep 17 00:00:00 2001
From: Nazir Bilal Yavuz <[email protected]>
Date: Mon, 18 May 2026 23:05:36 +0300
Subject: [PATCH v1] Add Github Actions as CI provider

---
 .github/workflows/main.yml                   | 747 +++++++++++++++++++
 src/tools/ci/ci_provider_helpers.sh          | 443 +++++++++++
 src/tools/ci/ci_provider_windows_helpers.ps1 |  93 +++
 3 files changed, 1283 insertions(+)
 create mode 100644 .github/workflows/main.yml
 create mode 100755 src/tools/ci/ci_provider_helpers.sh
 create mode 100644 src/tools/ci/ci_provider_windows_helpers.ps1

diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
new file mode 100644
index 00000000000..6366ac3d8e3
--- /dev/null
+++ b/.github/workflows/main.yml
@@ -0,0 +1,747 @@
+# GitHub Actions CI workflow
+
+name: Postgres Github Actions CI
+
+on:
+  push:
+    branches: [ "*" ]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  # Never cancel in-progress runs on master to ensure all commits are tested.
+  cancel-in-progress: ${{ github.ref != 'refs/heads/master' }}
+
+env:
+  PGCTLTIMEOUT: 120
+  PG_TEST_EXTRA: kerberos ldap ssl libpq_encryption load_balance oauth
+  CCACHE_MAXSIZE: 250M
+  CI_OS_ONLY_JOBS: sanitycheck linux macos windows mingw compilerwarnings
+
+  MBUILD_TARGET: all testprep
+  MTEST_ARGS: --print-errorlogs --no-rebuild -C build
+  CHECK: check-world PROVE_FLAGS=--timer
+  CHECKFLAGS: -Otarget
+
+  MESON_COMMON_PG_CONFIG_ARGS: -Dcassert=true -Dinjection_points=true
+  MESON_COMMON_FEATURES: >-
+    -Dauto_features=disabled
+    -Dldap=enabled
+    -Dssl=openssl
+    -Dtap_tests=enabled
+    -Dplperl=enabled
+    -Dplpython=enabled
+    -Ddocs=enabled
+    -Dicu=enabled
+    -Dlibxml=enabled
+    -Dlibxslt=enabled
+    -Dlz4=enabled
+    -Dpltcl=enabled
+    -Dreadline=enabled
+    -Dzlib=enabled
+    -Dzstd=enabled
+
+  LINUX_CONFIGURE_FEATURES: >-
+    --with-gssapi
+    --with-icu
+    --with-ldap
+    --with-libcurl
+    --with-libxml
+    --with-libxslt
+    --with-llvm
+    --with-lz4
+    --with-pam
+    --with-perl
+    --with-python
+    --with-selinux
+    --with-ssl=openssl
+    --with-systemd
+    --with-tcl --with-tclconfig=/usr/lib/tcl8.6/
+    --with-uuid=ossp
+    --with-zstd
+
+  ARTIFACT_RETENTION_DAYS: 30
+  MESON_LOG_PATHS: |
+    build*/testrun/**/*.log
+    build*/testrun/**/*.diffs
+    build*/testrun/**/regress_log_*
+    build*/meson-logs/*.txt
+
+
+jobs:
+  # Add 'ci-os-only: <job1> <job2> ...' to the commit description to run
+  # only specific jobs. Valid names:
+  #   sanitycheck, linux, macos, windows, mingw, compilerwarnings
+  # Jobs can be space or comma-separated.
+  # Example: 'ci-os-only: macos, linux' runs only macOS and Linux jobs.
+  # If omitted, all jobs run.
+  ci-config:
+    name: CI Configuration
+    runs-on: ubuntu-24.04
+    timeout-minutes: 1
+    outputs:
+      run-sanitycheck: ${{ steps.parse.outputs.run-sanitycheck }}
+      run-linux: ${{ steps.parse.outputs.run-linux }}
+      run-macos: ${{ steps.parse.outputs.run-macos }}
+      run-windows: ${{ steps.parse.outputs.run-windows }}
+      run-mingw: ${{ steps.parse.outputs.run-mingw }}
+      run-compilerwarnings: ${{ steps.parse.outputs.run-compilerwarnings }}
+    steps:
+      - name: Parse ci-os-only from commit message
+        id: parse
+        env:
+          # NOTE: github.event.head_commit.message is null on pull_request
+          # events. This workflow only triggers on push, so this is fine.
+          # If a pull_request trigger is added later, the filter will be
+          # silently disabled unless this is reworked.
+          COMMIT_MSG: ${{ github.event.head_commit.message }}
+        run: |
+          set -e
+          CI_ONLY=$(echo "${COMMIT_MSG}" | grep -i '^ci-os-only:' | head -1 | sed 's/^[^:]*://' | tr ',' ' ' | xargs)
+          if [ -z "${CI_ONLY}" ]; then
+            echo "No ci-os-only filter found, all jobs enabled"
+            for name in ${CI_OS_ONLY_JOBS}; do
+              echo "run-${name}=true" >> "${GITHUB_OUTPUT}"
+            done
+          else
+            echo "ci-os-only filter: ${CI_ONLY}"
+            for name in ${CI_OS_ONLY_JOBS}; do
+              if echo " ${CI_ONLY} " | grep -qi " ${name} "; then
+                echo "run-${name}=true" >> "${GITHUB_OUTPUT}"
+              else
+                echo "run-${name}=false" >> "${GITHUB_OUTPUT}"
+              fi
+            done
+          fi
+
+
+  sanity-check:
+    name: SanityCheck
+    needs: ci-config
+    if: needs.ci-config.outputs.run-sanitycheck == 'true'
+    runs-on: ubuntu-24.04
+    timeout-minutes: 15
+
+    env:
+      BUILD_JOBS: 8
+      TEST_JOBS: 8
+      CCACHE_DIR: ${{ github.workspace }}/ccache_dir
+      CCACHE_MAXSIZE: 150M
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+
+      - name: System info
+        run: src/tools/ci/ci_provider_helpers.sh github_actions sysinfo
+
+      - name: Install dependencies
+        run: sudo src/tools/ci/ci_provider_helpers.sh github_actions install_packages linux minimal
+
+      - name: Restore ccache
+        uses: actions/cache@v5
+        with:
+          path: ${{ env.CCACHE_DIR }}
+          key: ccache-${{ github.job }}-${{ github.ref }}-${{ github.sha }}
+          restore-keys: |
+            ccache-${{ github.job }}-${{ github.ref }}-
+            ccache-${{ github.job }}-
+
+      - name: Setup cores
+        run: sudo src/tools/ci/ci_provider_helpers.sh github_actions setup_cores linux /tmp/cores $(whoami)
+
+      - name: Configure
+        run: |
+          set -e
+          src/tools/ci/ci_provider_helpers.sh github_actions configure_meson build \
+            --buildtype=debug \
+            --auto-features=disabled \
+            -Ddefault_library=shared \
+            -Dtap_tests=enabled
+
+      - name: Build
+        run: src/tools/ci/ci_provider_helpers.sh github_actions build_meson build ${BUILD_JOBS} ${MBUILD_TARGET}
+
+      - name: Test (minimal)
+        run: |
+          set -e
+          # Allow locked memory for AIO and core dumps for debugging failures.
+          sudo prlimit --pid $$ --memlock=unlimited:unlimited --core=unlimited:unlimited
+          src/tools/ci/ci_provider_helpers.sh github_actions sanity_test ${TEST_JOBS} ${MTEST_ARGS}
+
+      - name: Upload logs on failure
+        if: failure()
+        uses: actions/upload-artifact@v7
+        with:
+          name: ${{ github.job }}-logs-${{ github.run_id }}
+          path: ${{ env.MESON_LOG_PATHS }}
+          retention-days: ${{ env.ARTIFACT_RETENTION_DAYS }}
+
+
+  linux-meson:
+    name: Linux - Ubuntu 24.04 - Meson
+    needs: [ci-config, sanity-check]
+    if: |
+      !cancelled() &&
+      needs.ci-config.outputs.run-linux == 'true' &&
+      needs.sanity-check.result != 'failure'
+    runs-on: ubuntu-24.04
+    timeout-minutes: 45
+
+    env:
+      BUILD_JOBS: 4
+      TEST_JOBS: 8
+      CCACHE_DIR: /tmp/ccache_dir
+      CCACHE_MAXSIZE: 400M
+      # NOTE: GitHub Actions does not allow referencing one env var from
+      # another in the same env block (neither workflow- nor job-level env
+      # is exposed via the ${{ env.* }} context here). The SANITIZER_FLAGS
+      # value is therefore duplicated in CFLAGS/CXXFLAGS/LDFLAGS below; keep
+      # them in sync.
+      SANITIZER_FLAGS: -fsanitize=alignment,undefined
+      CFLAGS: -Og -ggdb -fno-sanitize-recover=all -fsanitize=alignment,undefined
+      CXXFLAGS: -Og -ggdb -fno-sanitize-recover=all -fsanitize=alignment,undefined
+      LDFLAGS: -fsanitize=alignment,undefined
+      CC: ccache gcc
+      CXX: ccache g++
+      UBSAN_OPTIONS: print_stacktrace=1:disable_coredump=0:abort_on_error=1:verbosity=2
+      ASAN_OPTIONS: print_stacktrace=1:disable_coredump=0:abort_on_error=1:detect_leaks=0:detect_stack_use_after_return=0
+      DEBUGINFOD_URLS: "https://debuginfod.debian.net"
+      LINUX_MESON_FEATURES: -Duuid=e2fs
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+
+      - name: System info
+        run: src/tools/ci/ci_provider_helpers.sh github_actions sysinfo
+
+      - name: Install dependencies
+        run: sudo src/tools/ci/ci_provider_helpers.sh github_actions install_packages linux full_32bit
+
+      - name: Restore ccache
+        uses: actions/cache@v5
+        with:
+          path: ${{ env.CCACHE_DIR }}
+          key: ccache-${{ github.job }}-${{ github.ref }}-${{ github.sha }}
+          restore-keys: |
+            ccache-${{ github.job }}-${{ github.ref }}-
+            ccache-${{ github.job }}-
+
+      - name: Setup cores
+        run: sudo src/tools/ci/ci_provider_helpers.sh github_actions setup_cores linux /tmp/cores $(whoami)
+
+      - name: Configure (64-bit)
+        run: |
+          set -e
+          src/tools/ci/ci_provider_helpers.sh github_actions configure_meson build \
+            ${MESON_COMMON_PG_CONFIG_ARGS} \
+            --buildtype=debug \
+            ${LINUX_MESON_FEATURES} -Dllvm=enabled
+
+      - name: Build (64-bit)
+        run: |
+          set -e
+          src/tools/ci/ci_provider_helpers.sh github_actions build_meson build ${BUILD_JOBS} ${MBUILD_TARGET}
+          ninja -C build -t missingdeps
+
+      - name: Test (64-bit)
+        env:
+          PG_TEST_INITDB_EXTRA_OPTS: -c io_method=io_uring
+        run: |
+          set -e
+          # Allow locked memory for AIO and core dumps for debugging failures.
+          sudo prlimit --pid $$ --memlock=unlimited:unlimited --core=unlimited:unlimited
+          src/tools/ci/ci_provider_helpers.sh github_actions test_meson ${TEST_JOBS} ${MTEST_ARGS}
+          # so that we don't upload 64bit logs if 32bit fails
+          rm -rf build/
+
+      - name: Install conflicting 32-bit packages
+        run: sudo src/tools/ci/ci_provider_helpers.sh github_actions install_packages linux full_32bit_extra
+
+      - name: Configure (32-bit)
+        env:
+          CC: ccache gcc -m32
+          CXX: ccache g++ -m32
+        run: |
+          set -e
+          src/tools/ci/ci_provider_helpers.sh github_actions configure_meson build-32 \
+            ${MESON_COMMON_PG_CONFIG_ARGS} \
+            --buildtype=debug \
+            --pkg-config-path /usr/lib/i386-linux-gnu/pkgconfig/ \
+            -DPERL=perl5.38-i386-linux-gnu \
+            ${LINUX_MESON_FEATURES} -Dlibnuma=disabled -Dliburing=disabled
+
+      - name: Build (32-bit)
+        run: |
+          set -e
+          src/tools/ci/ci_provider_helpers.sh github_actions build_meson build-32 ${BUILD_JOBS} ${MBUILD_TARGET}
+          ninja -C build-32 -t missingdeps
+
+      - name: Test (32-bit)
+        env:
+          # Override MTEST_ARGS to point at the 32-bit build directory.
+          MTEST_ARGS: --print-errorlogs --no-rebuild -C build-32
+        run: |
+          set -e
+          # Allow locked memory for AIO and core dumps for debugging failures.
+          sudo prlimit --pid $$ --memlock=unlimited:unlimited --core=unlimited:unlimited
+          PYTHONCOERCECLOCALE=0 LANG=C \
+            src/tools/ci/ci_provider_helpers.sh github_actions test_meson ${TEST_JOBS} ${MTEST_ARGS}
+
+      - name: Core dump backtraces
+        if: failure()
+        run: src/tools/ci/cores_backtrace.sh linux /tmp/cores
+
+      - name: Upload logs on failure
+        if: failure()
+        uses: actions/upload-artifact@v7
+        with:
+          name: ${{ github.job }}-logs-${{ github.run_id }}
+          path: ${{ env.MESON_LOG_PATHS }}
+          retention-days: ${{ env.ARTIFACT_RETENTION_DAYS }}
+
+
+  linux-autoconf:
+    name: Linux - Ubuntu 24.04 - Autoconf
+    needs: [ci-config, sanity-check]
+    if: |
+      !cancelled() &&
+      needs.ci-config.outputs.run-linux == 'true' &&
+      needs.sanity-check.result != 'failure'
+    runs-on: ubuntu-24.04
+    timeout-minutes: 30
+
+    env:
+      BUILD_JOBS: 4
+      TEST_JOBS: 8
+      CCACHE_DIR: /tmp/ccache_dir
+      # NOTE: GitHub Actions does not allow referencing one env var from
+      # another in the same env block (neither workflow- nor job-level env
+      # is exposed via the ${{ env.* }} context here). The SANITIZER_FLAGS
+      # value is therefore duplicated in CFLAGS/CXXFLAGS/LDFLAGS below; keep
+      # them in sync.
+      SANITIZER_FLAGS: -fsanitize=address
+      CFLAGS: -Og -ggdb -fno-sanitize-recover=all -fsanitize=address
+      CXXFLAGS: -Og -ggdb -fno-sanitize-recover=all -fsanitize=address
+      LDFLAGS: -fsanitize=address
+      CC: ccache gcc
+      CXX: ccache g++
+      UBSAN_OPTIONS: print_stacktrace=1:disable_coredump=0:abort_on_error=1:verbosity=2
+      ASAN_OPTIONS: print_stacktrace=1:disable_coredump=0:abort_on_error=1:detect_leaks=0:detect_stack_use_after_return=0
+      PG_TEST_PG_COMBINEBACKUP_MODE: --copy-file-range
+      DEBUGINFOD_URLS: "https://debuginfod.debian.net"
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+
+      - name: System info
+        run: src/tools/ci/ci_provider_helpers.sh github_actions sysinfo
+
+      - name: Install dependencies
+        run: sudo src/tools/ci/ci_provider_helpers.sh github_actions install_packages linux full
+
+      - name: Restore ccache
+        uses: actions/cache@v5
+        with:
+          path: ${{ env.CCACHE_DIR }}
+          key: ccache-${{ github.job }}-${{ github.ref }}-${{ github.sha }}
+          restore-keys: |
+            ccache-${{ github.job }}-${{ github.ref }}-
+            ccache-${{ github.job }}-
+
+      - name: Setup cores
+        run: sudo src/tools/ci/ci_provider_helpers.sh github_actions setup_cores linux /tmp/cores $(whoami)
+
+      - name: Setup hosts
+        run: sudo src/tools/ci/ci_provider_helpers.sh github_actions setup_hosts
+
+      - name: Configure
+        run: |
+          set -e
+          src/tools/ci/ci_provider_helpers.sh github_actions configure_autoconf \
+            "${LINUX_CONFIGURE_FEATURES}" \
+            --enable-cassert --enable-injection-points --enable-debug \
+            --enable-tap-tests --enable-nls \
+            --with-segsize-blocks=6 \
+            --with-libnuma \
+            --with-liburing \
+            CLANG="ccache clang"
+
+      - name: Build
+        run: src/tools/ci/ci_provider_helpers.sh github_actions build_autoconf ${BUILD_JOBS} world-bin
+
+      - name: Test
+        run: |
+          set -e
+          # Allow locked memory for AIO and core dumps for debugging failures.
+          sudo prlimit --pid $$ --memlock=unlimited:unlimited --core=unlimited:unlimited
+          src/tools/ci/ci_provider_helpers.sh github_actions test_autoconf ${TEST_JOBS} ${CHECK} ${CHECKFLAGS}
+
+      - name: Core dump backtraces
+        if: failure()
+        run: src/tools/ci/cores_backtrace.sh linux /tmp/cores
+
+      - name: Upload logs on failure
+        if: failure()
+        uses: actions/upload-artifact@v7
+        with:
+          name: ${{ github.job }}-logs-${{ github.run_id }}
+          path: |
+            **/*.log
+            **/*.diffs
+            **/regress_log_*
+          retention-days: ${{ env.ARTIFACT_RETENTION_DAYS }}
+
+
+  macos-meson:
+    name: macOS - Sequoia - Meson
+    needs: [ci-config, sanity-check]
+    if: |
+      !cancelled() &&
+      needs.ci-config.outputs.run-macos == 'true' &&
+      needs.sanity-check.result != 'failure'
+    runs-on: macos-15
+    timeout-minutes: 30
+
+    env:
+      BUILD_JOBS: 4
+      TEST_JOBS: 8
+      CCACHE_DIR: ${{ github.workspace }}/ccache
+      CFLAGS: -Og -ggdb
+      CXXFLAGS: -Og -ggdb
+      CC: ccache cc
+      CXX: ccache c++
+      PG_TEST_PG_UPGRADE_MODE: --clone
+      PG_TEST_PG_COMBINEBACKUP_MODE: --clone
+      MESON_FEATURES: >-
+        -Dbonjour=enabled
+        -Ddtrace=enabled
+        -Dgssapi=enabled
+        -Dlibcurl=enabled
+        -Dnls=enabled
+        -Duuid=e2fs
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+
+      - name: System info
+        run: src/tools/ci/ci_provider_helpers.sh github_actions sysinfo
+
+      - name: Install dependencies
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          set -e
+          sudo -E src/tools/ci/ci_provider_helpers.sh github_actions install_packages macos
+          echo "/opt/local/sbin:/opt/local/bin" >> ${GITHUB_PATH}
+
+      - name: Restore ccache
+        uses: actions/cache@v5
+        with:
+          path: ${{ env.CCACHE_DIR }}
+          key: ccache-${{ github.job }}-${{ github.ref }}-${{ github.sha }}
+          restore-keys: |
+            ccache-${{ github.job }}-${{ github.ref }}-
+            ccache-${{ github.job }}-
+
+      - name: Setup cores
+        run: sudo src/tools/ci/ci_provider_helpers.sh github_actions setup_cores macos "${HOME}/cores"
+
+      - name: Configure
+        env:
+          PKG_CONFIG_PATH: /opt/local/lib/pkgconfig
+        run: |
+          set -e
+          src/tools/ci/ci_provider_helpers.sh github_actions configure_meson build \
+            ${MESON_COMMON_PG_CONFIG_ARGS} \
+            --buildtype=debug \
+            ${MESON_COMMON_FEATURES} ${MESON_FEATURES} \
+            -Dextra_include_dirs=/opt/local/include \
+            -Dextra_lib_dirs=/opt/local/lib
+
+      - name: Build
+        run: src/tools/ci/ci_provider_helpers.sh github_actions build_meson build ${BUILD_JOBS} ${MBUILD_TARGET}
+
+      - name: Test
+        run: |
+          set -e
+          ulimit -c unlimited
+          ulimit -n 1024
+          src/tools/ci/ci_provider_helpers.sh github_actions test_meson ${TEST_JOBS} ${MTEST_ARGS}
+
+      - name: Core dump backtraces
+        if: failure()
+        run: src/tools/ci/cores_backtrace.sh macos "${HOME}/cores"
+
+      - name: Upload logs on failure
+        if: failure()
+        uses: actions/upload-artifact@v7
+        with:
+          name: ${{ github.job }}-logs-${{ github.run_id }}
+          path: ${{ env.MESON_LOG_PATHS }}
+          retention-days: ${{ env.ARTIFACT_RETENTION_DAYS }}
+
+
+  windows-msvc:
+    name: Windows - Server 2022, VS 2022 - Meson & ninja
+    needs: [ci-config, sanity-check]
+    if: |
+      !cancelled() &&
+      needs.ci-config.outputs.run-windows == 'true' &&
+      needs.sanity-check.result != 'failure'
+    runs-on: windows-2022
+    timeout-minutes: 60
+
+    env:
+      BUILD_JOBS: 4
+      TEST_JOBS: 8
+      PG_TEST_USE_UNIX_SOCKETS: 1
+      PG_REGRESS_SOCK_DIR: ${{ github.workspace }}
+      MESON_FEATURES: >-
+        -Dcpp_args=/std:c++20
+        -Dauto_features=disabled
+        -Dtap_tests=enabled
+        -Dldap=enabled
+        -Dssl=openssl
+        -Dplperl=enabled
+        -Dplpython=enabled
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+
+      - name: System info
+        run: src/tools/ci/ci_provider_windows_helpers.ps1 github_actions sysinfo
+
+      - name: Disable Windows Defender
+        shell: powershell
+        run: src/tools/ci/ci_provider_windows_helpers.ps1 github_actions disable_defender
+
+      - name: Install dependencies
+        shell: powershell
+        run: src/tools/ci/ci_provider_windows_helpers.ps1 github_actions install_packages
+
+      - name: Setup hosts file
+        shell: powershell
+        run: src/tools/ci/ci_provider_windows_helpers.ps1 github_actions setup_hosts
+
+      - name: Setup MSVC environment and configure
+        shell: cmd
+        run: |
+          call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
+          meson setup %MESON_COMMON_PG_CONFIG_ARGS% --backend ninja --buildtype debug -Db_pch=true -DTAR=c:\windows\system32\tar.exe %MESON_FEATURES% build
+
+      - name: Build
+        shell: cmd
+        run: |
+          call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
+          ninja -C build -j%BUILD_JOBS% %MBUILD_TARGET%
+          ninja -C build -t missingdeps
+
+      - name: Test
+        shell: cmd
+        run: |
+          call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
+          REM Grant Everyone full control on the build directory so that
+          REM postgres.exe can access data files after it drops admin
+          REM privileges via CreateRestrictedToken().
+          icacls build /grant Everyone:(OI)(CI)(F) /T /Q
+          meson test %MTEST_ARGS% --num-processes %TEST_JOBS%
+
+      - name: Upload logs on failure
+        if: failure()
+        uses: actions/upload-artifact@v7
+        with:
+          name: ${{ github.job }}-logs-${{ github.run_id }}
+          path: |
+            ${{ env.MESON_LOG_PATHS }}
+            crashlog-*.txt
+          retention-days: ${{ env.ARTIFACT_RETENTION_DAYS }}
+
+
+  windows-mingw:
+    name: Windows - Server 2022, MinGW64 - Meson
+    needs: [ci-config, sanity-check]
+    if: |
+      !cancelled() &&
+      needs.ci-config.outputs.run-mingw == 'true' &&
+      needs.sanity-check.result != 'failure'
+    runs-on: windows-2022
+    timeout-minutes: 60
+
+    defaults:
+      run:
+        shell: msys2 {0}
+
+    env:
+      BUILD_JOBS: 4
+      TEST_JOBS: 4
+      CCACHE_MAXSIZE: 500M
+      CCACHE_SLOPPINESS: pch_defines,time_macros
+      CCACHE_DEPEND: 1
+      PG_TEST_USE_UNIX_SOCKETS: 1
+      PG_REGRESS_SOCK_DIR: ${{ github.workspace }}
+
+    steps:
+      - name: Disable Windows Defender
+        shell: powershell
+        # Disable Windows Defender before installing packages to speed up the
+        # process. We cannot use the helper script here because it requires the
+        # repository to be checked out first, and checkout in turn requires
+        # MSYS2 to already be set up with all packages installed. To break this
+        # circular dependency, the Defender disabling logic is inlined below.
+        run: |
+          Set-MpPreference -DisableRealtimeMonitoring $true -SubmitSamplesConsent NeverSend -MAPSReporting Disable
+          # Verify Defender status
+          $status = Get-MpComputerStatus -ErrorAction SilentlyContinue
+          if ($status) {
+              Write-Host "RealTimeProtectionEnabled: $($status.RealTimeProtectionEnabled)"
+              Write-Host "AntivirusEnabled: $($status.AntivirusEnabled)"
+          }
+
+      - name: Setup MSYS2
+        uses: msys2/setup-msys2@v2
+        with:
+          msystem: UCRT64
+          update: true
+          install: >-
+            git bison flex make diffutils
+            mingw-w64-ucrt-x86_64-ccache
+            mingw-w64-ucrt-x86_64-docbook-xml
+            mingw-w64-ucrt-x86_64-gcc
+            mingw-w64-ucrt-x86_64-icu
+            mingw-w64-ucrt-x86_64-libbacktrace
+            mingw-w64-ucrt-x86_64-libxml2
+            mingw-w64-ucrt-x86_64-libxslt
+            mingw-w64-ucrt-x86_64-lz4
+            mingw-w64-ucrt-x86_64-make
+            mingw-w64-ucrt-x86_64-meson
+            mingw-w64-ucrt-x86_64-perl
+            mingw-w64-ucrt-x86_64-pkg-config
+            mingw-w64-ucrt-x86_64-python-cryptography
+            mingw-w64-ucrt-x86_64-python-pip
+            mingw-w64-ucrt-x86_64-python-pytest
+            mingw-w64-ucrt-x86_64-readline
+            mingw-w64-ucrt-x86_64-zlib
+
+      - name: Checkout
+        uses: actions/checkout@v5
+
+      - name: System info
+        run: src/tools/ci/ci_provider_helpers.sh github_actions sysinfo
+
+      - name: Install IPC::Run
+        run: src/tools/ci/ci_provider_helpers.sh github_actions install_ipc_run
+
+      - name: Restore ccache
+        uses: actions/cache@v5
+        with:
+          path: C:/msys64/ccache
+          key: ccache-${{ github.job }}-${{ github.ref }}-${{ github.sha }}
+          restore-keys: |
+            ccache-${{ github.job }}-${{ github.ref }}-
+            ccache-${{ github.job }}-
+
+      - name: Configure
+        env:
+          CCACHE_DIR: C:/msys64/ccache
+          # Keep -Dnls explicitly disabled (creates too many files, causes slowdown)
+          MESON_FEATURES: -Dnls=disabled
+        run: |
+          set -e
+          src/tools/ci/ci_provider_helpers.sh github_actions configure_meson build \
+            ${MESON_COMMON_PG_CONFIG_ARGS} \
+            -Ddebug=true -Doptimization=g -Db_pch=true \
+            ${MESON_COMMON_FEATURES} ${MESON_FEATURES} \
+            -DTAR=c:/windows/system32/tar.exe
+
+      - name: Build
+        run: src/tools/ci/ci_provider_helpers.sh github_actions build_meson build ${BUILD_JOBS} ${MBUILD_TARGET}
+
+      - name: Test
+        run: src/tools/ci/ci_provider_helpers.sh github_actions test_meson ${TEST_JOBS} ${MTEST_ARGS}
+
+      - name: Upload logs on failure
+        if: failure()
+        uses: actions/upload-artifact@v7
+        with:
+          name: ${{ github.job }}-logs-${{ github.run_id }}
+          path: |
+            ${{ env.MESON_LOG_PATHS }}
+            crashlog-*.txt
+          retention-days: ${{ env.ARTIFACT_RETENTION_DAYS }}
+
+
+  compiler-warnings:
+    name: CompilerWarnings
+    needs: [ci-config, sanity-check]
+    if: |
+      !cancelled() &&
+      needs.ci-config.outputs.run-compilerwarnings == 'true' &&
+      needs.sanity-check.result != 'failure'
+    runs-on: ubuntu-24.04
+    timeout-minutes: 60
+
+    env:
+      BUILD_JOBS: 4
+      CCACHE_DIR: /tmp/ccache_dir
+      CCACHE_MAXSIZE: 1G
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+
+      - name: System info
+        run: |
+          set -e
+          src/tools/ci/ci_provider_helpers.sh github_actions sysinfo
+          gcc -v
+          clang -v
+
+      - name: Install dependencies
+        run: sudo src/tools/ci/ci_provider_helpers.sh github_actions install_packages linux compiler_warnings
+
+      - name: Restore ccache
+        uses: actions/cache@v5
+        with:
+          path: ${{ env.CCACHE_DIR }}
+          key: ccache-${{ github.job }}-${{ github.ref }}-${{ github.sha }}
+          restore-keys: |
+            ccache-${{ github.job }}-${{ github.ref }}-
+            ccache-${{ github.job }}-
+
+      - name: Setup Werror
+        run: src/tools/ci/ci_provider_helpers.sh github_actions compiler_warnings_setup
+
+      - name: "Warnings: gcc (cassert off, dtrace on)"
+        run: src/tools/ci/ci_provider_helpers.sh github_actions compiler_warnings_gcc_no_cassert ${BUILD_JOBS} "${LINUX_CONFIGURE_FEATURES}"
+
+      - name: "Warnings: gcc (cassert on, dtrace off)"
+        run: src/tools/ci/ci_provider_helpers.sh github_actions compiler_warnings_gcc_cassert ${BUILD_JOBS} "${LINUX_CONFIGURE_FEATURES}"
+
+      - name: "Warnings: clang (cassert off, dtrace off)"
+        run: src/tools/ci/ci_provider_helpers.sh github_actions compiler_warnings_clang_no_cassert ${BUILD_JOBS} "${LINUX_CONFIGURE_FEATURES}"
+
+      - name: "Warnings: clang (cassert on, dtrace on)"
+        run: src/tools/ci/ci_provider_helpers.sh github_actions compiler_warnings_clang_cassert ${BUILD_JOBS} "${LINUX_CONFIGURE_FEATURES}"
+
+      - name: "Warnings: mingw cross-compile"
+        run: src/tools/ci/ci_provider_helpers.sh github_actions compiler_warnings_mingw_cross ${BUILD_JOBS}
+
+      - name: "Warnings: docs build"
+        run: src/tools/ci/ci_provider_helpers.sh github_actions compiler_warnings_docs ${BUILD_JOBS}
+
+      - name: "Warnings: headerscheck & cpluspluscheck"
+        run: src/tools/ci/ci_provider_helpers.sh github_actions compiler_warnings_headerscheck ${BUILD_JOBS} "${LINUX_CONFIGURE_FEATURES}"
+
+      - name: Upload logs on failure
+        if: failure()
+        uses: actions/upload-artifact@v7
+        with:
+          name: ${{ github.job }}-logs-${{ github.run_id }}
+          path: |
+            **/*.log
+            **/*.diffs
+          retention-days: ${{ env.ARTIFACT_RETENTION_DAYS }}
diff --git a/src/tools/ci/ci_provider_helpers.sh b/src/tools/ci/ci_provider_helpers.sh
new file mode 100755
index 00000000000..5d72cc1d84e
--- /dev/null
+++ b/src/tools/ci/ci_provider_helpers.sh
@@ -0,0 +1,443 @@
+#!/bin/sh
+# src/tools/ci/provider_helpers/main.sh - Unified CI entry point for PostgreSQL
+#
+# Usage: main.sh <provider> <task> [args...]
+#
+# Providers:
+#   github_actions  - GitHub Actions
+#
+
+set -e
+
+PROVIDER="${1}"
+TASK="${2}"
+shift 2
+
+##############################################################################
+# Setup tasks
+##############################################################################
+
+task_sysinfo() {
+    echo "=== System Information ==="
+    echo "Provider: ${PROVIDER}"
+    echo "User: $(whoami)"
+    echo "Hostname: $(hostname)"
+    echo "Kernel: $(uname -a)"
+    echo ""
+    echo "=== Resource Limits (Hard) ==="
+    ulimit -a -H
+    echo ""
+    echo "=== Resource Limits (Soft) ==="
+    ulimit -a -S
+    echo ""
+    echo "=== Environment ==="
+    export
+}
+
+# install_packages <os> [profile]
+#   os:      linux | macos
+#   profile: minimal | full | full_32bit | compiler_warnings  (linux only)
+task_install_packages() {
+    local os="${1}"
+    local profile="${2:-full}"
+
+    case "${os}" in
+        linux)  _install_linux_packages "${profile}" ;;
+        macos)  _install_macos_packages ;;
+        *)
+            echo "Error: unsupported OS '${os}' for install_packages"
+            exit 1
+            ;;
+    esac
+}
+
+_install_linux_packages() {
+    local profile="${1}"
+
+    # Packages shared by every Linux build
+    local common="build-essential gdb git make meson ccache perl libperl-dev libipc-run-perl"
+
+    # Full dependency set for autoconf / meson builds
+    local full="
+        libreadline-dev libssl-dev zlib1g-dev libicu-dev
+        libxml2-dev libxslt1-dev gettext
+        liblz4-dev libzstd-dev
+        libldap-dev libkrb5-dev krb5-admin-server krb5-kdc krb5-user
+        libpam0g-dev uuid-dev libossp-uuid-dev
+        python3-dev libtcl8.6 tcl-dev
+        libcurl4-openssl-dev
+        llvm-dev clang
+        libselinux1-dev libsystemd-dev
+        systemtap-sdt-dev
+        libnuma-dev liburing-dev"
+
+    apt-get update -qq
+
+    case "${profile}" in
+        minimal)
+            DEBIAN_FRONTEND=noninteractive \
+                apt-get install -y -qq --no-install-recommends ${common}
+            ;;
+        full)
+            DEBIAN_FRONTEND=noninteractive \
+                apt-get install -y -qq --no-install-recommends ${common} ${full}
+            ;;
+        full_32bit)
+            dpkg --add-architecture i386
+            apt-get update -qq
+            DEBIAN_FRONTEND=noninteractive \
+                apt-get install -y -qq --no-install-recommends --no-remove \
+                ${common} ${full} \
+                gcc-multilib \
+                libicu-dev:i386 \
+                libldap2-dev:i386 \
+                liblz4-dev:i386 \
+                libpam-dev:i386 \
+                libperl-dev:i386 \
+                libpython3-dev:i386 \
+                libreadline-dev:i386 \
+                libselinux-dev:i386 \
+                libssl-dev:i386 \
+                libsystemd-dev:i386 \
+                libxml2-dev:i386 \
+                libxslt1-dev:i386 \
+                libzstd-dev:i386 \
+                tcl-dev:i386 \
+                uuid-dev:i386
+            ;;
+        full_32bit_extra)
+            # Packages that conflict with their amd64 counterparts (they
+            # install arch-independent files like curl-config). Install these
+            # with --force-overwrite after the 64-bit build and tests are done,
+            # so the 64-bit toolchain is not affected.
+            DEBIAN_FRONTEND=noninteractive \
+                apt-get install -y -qq --no-install-recommends \
+                -o Dpkg::Options::="--force-overwrite" \
+                libcurl4-openssl-dev:i386
+            ;;
+        compiler_warnings)
+            DEBIAN_FRONTEND=noninteractive \
+                apt-get install -y -qq --no-install-recommends \
+                ${common} ${full} \
+                gcc g++ clang \
+                gcc-mingw-w64-x86-64-posix g++-mingw-w64-x86-64-posix \
+                docbook-xml docbook-xsl xsltproc libxml2-utils
+            ;;
+        *)
+            echo "Error: unknown Linux package profile '${profile}'"
+            exit 1
+            ;;
+    esac
+}
+
+_install_macos_packages() {
+    local macports_version="2.10.1"
+    local macos_major_version
+    macos_major_version=$(sw_vers -productVersion | sed 's/\..*//')
+
+    if [ ! -x /opt/local/bin/port ]; then
+        echo "=== Installing MacPorts ==="
+        # Fetch the .pkg URL from the GitHub releases API for this macOS version.
+        local macports_url
+        local api_response
+        # Need to use GITHUB_TOKEN, otherwise might get API rate limit
+        # exceeded for ${ip_adress}. Only send the Authorization header when
+        # GITHUB_TOKEN is non-empty: an empty token results in a malformed
+        # "Authorization: token " header that some GitHub endpoints reject.
+        if [ -n "${GITHUB_TOKEN:-}" ]; then
+            api_response=$(curl -sH "Authorization: token ${GITHUB_TOKEN}" \
+                "https://api.github.com/repos/macports/macports-base/releases")
+        else
+            api_response=$(curl -s \
+                "https://api.github.com/repos/macports/macports-base/releases")
+        fi
+        macports_url=$(echo "${api_response}" | python3 -c "
+import json, sys, re
+releases = json.loads(sys.stdin.read(), strict=False)
+for rel in releases:
+    if not rel['tag_name'].startswith('v${macports_version}'):
+        continue
+    for asset in rel.get('assets', []):
+        if re.match(r'MacPorts-.*-${macos_major_version}-.*\.pkg\$', asset['name']):
+            print(asset['browser_download_url'])
+            sys.exit(0)
+")
+        if [ -z "${macports_url}" ]; then
+            echo "Error: could not find MacPorts package for macOS ${macos_major_version}"
+            exit 1
+        fi
+        echo "Downloading: ${macports_url}"
+        curl -fsSL -o /tmp/macports.pkg "${macports_url}"
+        installer -pkg /tmp/macports.pkg -target /
+        rm -f /tmp/macports.pkg
+    fi
+
+    export PATH=/opt/local/sbin/:/opt/local/bin/:${PATH}
+
+    echo "=== Installing packages via MacPorts ==="
+    port install -N \
+        ccache icu kerberos5 lz4 meson openldap openssl \
+        p5.34-io-tty p5.34-ipc-run python312 tcl zstd
+    /opt/local/bin/port select python3 python312
+}
+
+
+
+# setup_cores <os> [core_dir]
+task_setup_cores() {
+    local os="${1}"
+    local core_dir="${2:-/tmp/cores}"
+    local username="${3}"
+
+    mkdir -p "${core_dir}"
+    chmod 770 "${core_dir}"
+
+    case "${os}" in
+        linux)
+            local conf_file="/etc/security/limits.d/${username}.conf"
+
+            sysctl kernel.core_pattern="${core_dir}/%e-%s-%p.core"
+
+            touch "${conf_file}" && chown "${username}:${username}" "${conf_file}"
+            # Allow all users to create unlimited core dumps
+            echo '* - core unlimited' > "${conf_file}"
+            ;;
+        macos)
+            sysctl kern.corefile="${core_dir}/core.%P"
+            ;;
+        *)
+            echo "Error: unsupported OS '${os}' for setup_cores"
+            exit 1
+            ;;
+    esac
+}
+
+task_setup_hosts() {
+    echo "127.0.0.1 pg-loadbalancetest" >> /etc/hosts
+    echo "127.0.0.2 pg-loadbalancetest" >> /etc/hosts
+    echo "127.0.0.3 pg-loadbalancetest" >> /etc/hosts
+    echo "Updated /etc/hosts with load-balance test entries"
+}
+
+# install_ipc_run
+#   Installs IPC::Run for Perl (used by MinGW CI).
+task_install_ipc_run() {
+    echo "=== Installing IPC::Run ==="
+    echo "Check if IPC::Run is already installed, it shouldn't be at this point"
+    if perl -mIPC::Run -e 1 2>/dev/null; then echo "ERROR: IPC::Run already installed"; exit 1; fi
+    # MinGW CI tasks started failing after the package was updated from
+    # NJM/IPC-Run-20250809.0 to TODDR/IPC-Run-20260322.0. There is no way to
+    # install IPC::Run from an author without specifying the exact version number
+    # so install the latest working one. (NJM/IPC-Run-20250809.0.tar.gz). See:
+    # - https://postgr.es/m/CAN55FZ06xanSbJdHe-CurjX_qNuBWZDEvS1kAk36L38YCtZXnw%40mail.gmail.com
+    (echo; echo o conf recommends_policy 0; echo notest install NJM/IPC-Run-20250809.0.tar.gz) | cpan
+    # Check if IPC::Run is installed correctly
+    perl -mIPC::Run -e 1
+}
+
+##############################################################################
+# Configure tasks
+##############################################################################
+
+# configure_meson <build_dir> [meson_args...]
+task_configure_meson() {
+    local build_dir="${1}"
+    shift
+
+    meson setup "$(pwd)" "${build_dir}" "$@"
+}
+
+# configure_autoconf <configure_features> [configure_args...]
+task_configure_autoconf() {
+    local features="${1}"
+    shift
+
+    # shellcheck disable=SC2086
+    ./configure ${features} "$@"
+}
+
+##############################################################################
+# Build tasks
+##############################################################################
+
+# build_meson <build_dir> <jobs> <targets...>
+task_build_meson() {
+    local build_dir="${1}"
+    local jobs="${2}"
+    shift 2
+
+    ninja -C "${build_dir}" -j"${jobs}" "$@"
+}
+
+# build_autoconf <jobs> <targets...>
+task_build_autoconf() {
+    local jobs="${1}"
+    shift
+
+    make -s -j"${jobs}" "$@"
+}
+
+##############################################################################
+# Test tasks
+##############################################################################
+
+# test_meson <jobs> <mtest_args...>
+task_test_meson() {
+    local jobs="${1}"
+    shift
+
+    ulimit -c unlimited
+    meson test "$@" --num-processes "${jobs}"
+}
+
+# test_autoconf <jobs> <make_args...>
+task_test_autoconf() {
+    local jobs="${1}"
+    shift
+
+    ulimit -c unlimited
+    make -s -j"${jobs}" "$@"
+}
+
+# sanity_test <jobs> <mtest_args...>
+task_sanity_test() {
+    local jobs="${1}"
+    shift
+
+    ulimit -c unlimited
+    meson test "$@" --suite setup
+    meson test "$@" --num-processes "${jobs}" \
+        cube/regress pg_ctl/001_start_stop
+}
+
+task_compiler_warnings_setup() {
+    echo "COPT=-Werror" > src/Makefile.custom
+}
+
+# compiler_warnings_gcc_no_cassert <jobs> <configure_features>
+task_compiler_warnings_gcc_no_cassert() {
+    local jobs="${1}"
+    local features="${2}"
+
+    echo "====== gcc, cassert off, dtrace on ======"
+    # shellcheck disable=SC2086
+    ./configure --cache gcc-no-cassert.cache --enable-dtrace \
+        ${features} CC="ccache gcc" CXX="ccache g++" CLANG="ccache clang"
+    make -s -j"${jobs}" clean
+    make -s -j"${jobs}" world-bin
+}
+
+# compiler_warnings_gcc_cassert <jobs> <configure_features>
+task_compiler_warnings_gcc_cassert() {
+    local jobs="${1}"
+    local features="${2}"
+
+    echo "====== gcc, cassert on, dtrace off ======"
+    # shellcheck disable=SC2086
+    ./configure --cache gcc-cassert.cache --enable-cassert \
+        ${features} CC="ccache gcc" CXX="ccache g++" CLANG="ccache clang"
+    make -s -j"${jobs}" clean
+    make -s -j"${jobs}" world-bin
+}
+
+# compiler_warnings_clang_no_cassert <jobs> <configure_features>
+task_compiler_warnings_clang_no_cassert() {
+    local jobs="${1}"
+    local features="${2}"
+
+    echo "====== clang, cassert off, dtrace off ======"
+    # shellcheck disable=SC2086
+    ./configure --cache clang-no-cassert.cache \
+        ${features} CC="ccache clang" CXX="ccache clang++" CLANG="ccache clang"
+    make -s -j"${jobs}" clean
+    make -s -j"${jobs}" world-bin
+}
+
+# compiler_warnings_clang_cassert <jobs> <configure_features>
+task_compiler_warnings_clang_cassert() {
+    local jobs="${1}"
+    local features="${2}"
+
+    echo "====== clang, cassert on, dtrace on ======"
+    # shellcheck disable=SC2086
+    ./configure --cache clang-cassert.cache --enable-cassert --enable-dtrace \
+        ${features} CC="ccache clang" CXX="ccache clang++" CLANG="ccache clang"
+    make -s -j"${jobs}" clean
+    make -s -j"${jobs}" world-bin
+}
+
+# compiler_warnings_mingw_cross <jobs>
+task_compiler_warnings_mingw_cross() {
+    local jobs="${1}"
+
+    ./configure --host=x86_64-w64-mingw32 --enable-cassert \
+        --without-icu --without-zlib \
+        CC="ccache x86_64-w64-mingw32-gcc" \
+        CXX="ccache x86_64-w64-mingw32-g++"
+    make -s -j"${jobs}" clean
+    make -s -j"${jobs}" world-bin
+}
+
+# compiler_warnings_docs <jobs>
+task_compiler_warnings_docs() {
+    local jobs="${1}"
+
+    ./configure --cache docs.cache \
+        CC="ccache gcc" CXX="ccache g++" CLANG="ccache clang"
+    make -s -j"${jobs}" clean
+    make -s -j"${jobs}" -C doc
+}
+
+# compiler_warnings_headerscheck <jobs> <configure_features>
+task_compiler_warnings_headerscheck() {
+    local jobs="${1}"
+    local features="${2}"
+
+    # shellcheck disable=SC2086
+    ./configure ${features} --cache headerscheck.cache --quiet \
+        CC="ccache gcc" CXX="ccache g++" CLANG="ccache clang"
+    make -s -j"${jobs}" clean
+    make -s -j"${jobs}" -k -Otarget headerscheck cpluspluscheck \
+        EXTRAFLAGS='-fmax-errors=10'
+}
+
+##############################################################################
+# Dispatch
+##############################################################################
+
+case "${TASK}" in
+    sysinfo)            task_sysinfo "$@" ;;
+    install_packages)   task_install_packages "$@" ;;
+    install_ipc_run)    task_install_ipc_run "$@" ;;
+    setup_cores)        task_setup_cores "$@" ;;
+    setup_hosts)        task_setup_hosts "$@" ;;
+    configure_meson)    task_configure_meson "$@" ;;
+    configure_autoconf) task_configure_autoconf "$@" ;;
+    build_meson)        task_build_meson "$@" ;;
+    build_autoconf)     task_build_autoconf "$@" ;;
+    test_meson)         task_test_meson "$@" ;;
+    test_autoconf)      task_test_autoconf "$@" ;;
+    sanity_test)        task_sanity_test "$@" ;;
+    compiler_warnings_setup)            task_compiler_warnings_setup "$@" ;;
+    compiler_warnings_gcc_no_cassert)   task_compiler_warnings_gcc_no_cassert "$@" ;;
+    compiler_warnings_gcc_cassert)      task_compiler_warnings_gcc_cassert "$@" ;;
+    compiler_warnings_clang_no_cassert) task_compiler_warnings_clang_no_cassert "$@" ;;
+    compiler_warnings_clang_cassert)    task_compiler_warnings_clang_cassert "$@" ;;
+    compiler_warnings_mingw_cross)      task_compiler_warnings_mingw_cross "$@" ;;
+    compiler_warnings_docs)             task_compiler_warnings_docs "$@" ;;
+    compiler_warnings_headerscheck)     task_compiler_warnings_headerscheck "$@" ;;
+    *)
+        echo "Error: unknown task '${TASK}'"
+        echo ""
+        echo "Available tasks:"
+        echo "  sysinfo install_packages install_ipc_run setup_cores setup_hosts"
+        echo "  configure_meson configure_autoconf"
+        echo "  build_meson build_autoconf"
+        echo "  test_meson test_autoconf sanity_test"
+        echo "  compiler_warnings_setup compiler_warnings_gcc_no_cassert"
+        echo "  compiler_warnings_gcc_cassert compiler_warnings_clang_no_cassert"
+        echo "  compiler_warnings_clang_cassert compiler_warnings_mingw_cross"
+        echo "  compiler_warnings_docs compiler_warnings_headerscheck"
+        exit 1
+        ;;
+esac
diff --git a/src/tools/ci/ci_provider_windows_helpers.ps1 b/src/tools/ci/ci_provider_windows_helpers.ps1
new file mode 100644
index 00000000000..af9cdbc4431
--- /dev/null
+++ b/src/tools/ci/ci_provider_windows_helpers.ps1
@@ -0,0 +1,93 @@
+# src/tools/ci/provider_helpers/main.ps1
+#
+# Usage: main.ps1 <provider> <task> [args...]
+#
+# Providers:
+#   github_actions  - GitHub Actions
+#
+
+param(
+    [Parameter(Mandatory = $true, Position = 0)]
+    [string]$Provider,
+
+    [Parameter(Mandatory = $true, Position = 1)]
+    [string]$Task,
+
+    [Parameter(ValueFromRemainingArguments = $true)]
+    [string[]]$ExtraArgs
+)
+
+$ErrorActionPreference = "Stop"
+
+function Invoke-Sysinfo {
+    Write-Host "=== System Information ==="
+    Write-Host "Provider: $Provider"
+    chcp
+    systeminfo
+    Get-PSDrive -PSProvider FileSystem
+    Get-ChildItem Env: | Sort-Object Name
+}
+
+function Invoke-SetupHosts {
+    $hostsFile = "C:\Windows\System32\Drivers\etc\hosts"
+    Add-Content -Path $hostsFile -Value "127.0.0.1 pg-loadbalancetest"
+    Add-Content -Path $hostsFile -Value "127.0.0.2 pg-loadbalancetest"
+    Add-Content -Path $hostsFile -Value "127.0.0.3 pg-loadbalancetest"
+    Write-Host "Updated hosts file:"
+    Get-Content $hostsFile
+}
+
+function Invoke-DisableDefender {
+    Set-MpPreference -DisableRealtimeMonitoring $true -SubmitSamplesConsent NeverSend -MAPSReporting Disable
+    # Verify Defender status
+    $status = Get-MpComputerStatus -ErrorAction SilentlyContinue
+    if ($status) {
+        Write-Host "RealTimeProtectionEnabled: $($status.RealTimeProtectionEnabled)"
+        Write-Host "AntivirusEnabled: $($status.AntivirusEnabled)"
+    }
+}
+
+function Invoke-InstallPackages {
+    $before = $env:Path -split ';'
+
+    # First install only strawberryperl with the --version option,
+    # otherwise --version tag applies to all packages.
+    choco install -y --no-progress --force `
+        strawberryperl --version=5.42.0.1
+
+    choco install -y --no-progress `
+        meson `
+        ninja `
+        winflexbison3 `
+        diffutils `
+        pkgconfiglite `
+        openssl `
+        xsltproc `
+        zstandard `
+        python3
+
+    # Refresh PATH using Chocolatey's helper to pick up Machine PATH changes
+    Import-Module $env:ChocolateyInstall\helpers\chocolateyProfile.psm1
+    refreshenv
+    # Persist new PATH entries for subsequent steps.
+    # Deduplicate to avoid appending the same path multiple times when
+    # multiple installed packages contribute the same directory.
+    $after = $env:Path -split ';'
+    $new = $after | Where-Object { $_ -and $before -notcontains $_ } | Select-Object -Unique
+    Write-Host "=== New PATH entries ==="
+    $new | ForEach-Object { Write-Host "  $_" }
+    $new | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
+}
+
+switch ($Task) {
+    "sysinfo"          { Invoke-Sysinfo }
+    "setup_hosts"      { Invoke-SetupHosts }
+    "disable_defender" { Invoke-DisableDefender }
+    "install_packages" { Invoke-InstallPackages }
+    default {
+        Write-Error "Unknown task: $Task"
+        Write-Host ""
+        Write-Host "Available tasks: sysinfo setup_hosts disable_defender install_packages"
+        exit 1
+    }
+}
-- 
2.43.0



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