diff --git a/.github/workflows/build-pyrage.yml b/.github/workflows/build-pyrage.yml
new file mode 100644
index 000000000..e2fa4457b
--- /dev/null
+++ b/.github/workflows/build-pyrage.yml
@@ -0,0 +1,106 @@
+# SPDX-FileCopyrightText: 2026 The RISE Project
+# SPDX-License-Identifier: MIT
+---
+# This workflow is based on the `test`/`release-linux` jobs of
+# https://github.com/woodruffw/pyrage/blob/v1.4.0/.github/workflows/ci.yml and
+# https://github.com/woodruffw/pyrage/blob/v1.4.0/.github/workflows/release.yml
+name: Build pyrage wheels (riscv64)
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'pyrage version to build (git tag without the leading v, e.g. 1.4.0)'
+        required: true
+        default: '1.4.0'
+  pull_request:
+    paths:
+      - '.github/workflows/build-pyrage.yml'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ inputs.version || '1.4.0' }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read  # to fetch code (actions/checkout)
+
+env:
+  # `inputs.version` is empty on pull_request events; default to 1.4.0 there.
+  PYRAGE_VERSION: ${{ inputs.version || '1.4.0' }}
+  MANYLINUX_RISCV64_IMAGE: quay.io/pypa/manylinux_2_39_riscv64
+
+jobs:
+  setup:
+    uses: $/.github/workflows/_setup.yml
+
+  build_wheels:
+    needs: [setup]
+    name: Build pyrage ${{ inputs.version || '1.4.0' }} ${{ matrix.tag }}-manylinux_riscv64
+    runs-on: ubuntu-24.04-riscv
+    timeout-minutes: 60
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          # pyo3's abi3-py310 feature is on unconditionally, so one abi3 wheel
+          # serves every GIL-ful interpreter up to cp314 (abi3 wheels are
+          # forward-compatible; only the cp310 build actually compiles).
+          # cp314t is dropped (gotcha 322): v1.4.0's Cargo.lock pins pyo3
+          # 0.24.2, whose build script hard-errors "configured Python
+          # interpreter version (3.14) is newer than PyO3's maximum
+          # supported version (3.13)" for any non-abi3 (free-threaded)
+          # build. Bumping pyo3 needs a pyo3-file bump too and then breaks
+          # on pyo3 0.29's Python::with_gil -> try_attach rename across
+          # every src/*.rs file - too invasive for this port; upstream
+          # fixed this on main post-v1.4.0 by bumping to pyo3 0.29.2.
+          - tag: cp310-abi3
+            build: >-
+              cp310-manylinux_riscv64 cp311-manylinux_riscv64
+              cp312-manylinux_riscv64 cp313-manylinux_riscv64
+              cp314-manylinux_riscv64
+
+    steps:
+      - name: Checkout pyrage v${{ env.PYRAGE_VERSION }}
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1  # v7.0.1
+        with:
+          repository: woodruffw/pyrage
+          ref: v${{ env.PYRAGE_VERSION }}
+          persist-credentials: false
+
+      - name: Build and test wheel
+        uses: pypa/cibuildwheel@1828c10ab37f080699c7b81cea34097c684a7074  # v4.2.0
+        with:
+          output-dir: wheelhouse/
+        env:
+          # musllinux is dropped: rustup.rs ships no riscv64 musl toolchain.
+          CIBW_BUILD: ${{ matrix.build }}
+          CIBW_MANYLINUX_RISCV64_IMAGE: ${{ env.MANYLINUX_RISCV64_IMAGE }}
+          # pyrage ships no [tool.cibuildwheel], so the Rust toolchain its
+          # maturin backend needs is installed in-container here.
+          CIBW_BEFORE_ALL_LINUX: >-
+            curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
+          CIBW_ENVIRONMENT_LINUX: PATH="$PATH:$HOME/.cargo/bin"
+          CIBW_TEST_REQUIRES: pytest parameterized
+          CIBW_TEST_SOURCES: test
+          # No python-source in pyproject.toml, so maturin ships an auto-generated
+          # pyrage/__init__.py shim around the compiled pyrage/pyrage.*.so submodule
+          # (gotcha 314) - probe that submodule, not the top-level import.
+          CIBW_TEST_COMMAND: >-
+            python -c "import pyrage.pyrage as m; assert m.__file__.endswith('.so'), m.__file__" &&
+            python -m pytest -v test
+
+      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
+        with:
+          name: pyrage-${{ env.PYRAGE_VERSION }}-${{ matrix.tag }}-manylinux_riscv64
+          path: wheelhouse/*.whl
+          if-no-files-found: error
+
+  publish:
+    name: Publish pyrage ${{ inputs.version || '1.4.0' }}
+    needs: [setup, build_wheels]
+    permissions:
+      contents: write
+      pull-requests: write
+    uses: $/.github/workflows/_publish-wheel.yml
+    with:
+      artifact-pattern: pyrage-${{ inputs.version || '1.4.0' }}-*-manylinux_riscv64