diff --git a/.github/workflows/build-pydevd.yml b/.github/workflows/build-pydevd.yml
new file mode 100644
index 000000000..e42b78548
--- /dev/null
+++ b/.github/workflows/build-pydevd.yml
@@ -0,0 +1,108 @@
+# SPDX-FileCopyrightText: 2026 The RISE Project
+# SPDX-License-Identifier: MIT
+---
+# This workflow is based on: https://github.com/fabioz/PyDev.Debugger/blob/pydev_debugger_3_5_0/.github/workflows/pydevd-release-manylinux.yml
+name: Build pydevd wheels (riscv64)
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'pydevd version (git tag pydev_debugger_<version with _>, e.g. 3.5.0)'
+        required: true
+        default: '3.5.0'
+  pull_request:
+    paths:
+      - '.github/workflows/build-pydevd.yml'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ inputs.version || '3.5.0' }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read  # to fetch code (actions/checkout)
+
+env:
+  PYDEVD_VERSION: ${{ inputs.version || '3.5.0' }}
+  MANYLINUX_RISCV64_IMAGE: quay.io/pypa/manylinux_2_39_riscv64
+
+jobs:
+  setup:
+    uses: $/.github/workflows/_setup.yml
+
+  build_wheels:
+    needs: [setup]
+    name: Build pydevd ${{ inputs.version || '3.5.0' }} ${{ matrix.python }}-manylinux_riscv64
+    runs-on: ubuntu-24.04-riscv
+    timeout-minutes: 90
+    strategy:
+      fail-fast: false
+      matrix:
+        # No cp314t: upstream ships no cp3xxt wheel for pydevd, its own test
+        # matrix carries no free-threaded job, and setup.py's classifiers don't
+        # mention free threading (same signal debugpy used for its own pydevd
+        # build, CLAUDE.md gotcha 33).
+        python:
+          - "cp312"
+          - "cp313"
+          - "cp314"
+
+    steps:
+      # Upstream tags releases as `pydev_debugger_<version with _ instead of .>`.
+      - name: Resolve upstream tag
+        run: echo "PYDEVD_TAG=pydev_debugger_${PYDEVD_VERSION//./_}" >> "$GITHUB_ENV"
+
+      - name: Checkout pydevd ${{ env.PYDEVD_VERSION }}
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1  # v7.0.1
+        with:
+          repository: fabioz/PyDev.Debugger
+          ref: ${{ env.PYDEVD_TAG }}
+          persist-credentials: false
+
+      - name: Build wheels
+        uses: pypa/cibuildwheel@1828c10ab37f080699c7b81cea34097c684a7074  # v4.2.0
+        with:
+          output-dir: wheelhouse/
+          only: ${{ matrix.python }}-manylinux_riscv64
+        env:
+          CIBW_MANYLINUX_RISCV64_IMAGE: ${{ env.MANYLINUX_RISCV64_IMAGE }}
+          # Cython 3.3.0 enforces PEP-484 annotations more strictly and rejects
+          # _pydevd_sys_monitoring_cython.pyx's repeated `func_code_info: FuncCodeInfo = ...`
+          # as a redeclaration (CLAUDE.md gotcha 175).
+          CIBW_BEFORE_ALL: echo 'Cython<3.3.0' > /cython-constraint.txt
+          CIBW_ENVIRONMENT: >-
+            PIP_EXTRA_INDEX_URL=https://pypi.riseproject.dev/simple/
+            PIP_CONSTRAINT=/cython-constraint.txt
+          CIBW_TEST_SOURCES: conftest.py tests_python pytest.ini
+          # untangle parses the debuggee's XML protocol messages in debugger_unittest.py.
+          CIBW_TEST_REQUIRES: pytest untangle
+          CIBW_TEST_ENVIRONMENT: PYDEVD_USE_CYTHON=YES
+          CIBW_TEST_COMMAND: >-
+            python -c "import _pydevd_bundle.pydevd_cython as c;
+            import _pydevd_sys_monitoring._pydevd_sys_monitoring_cython as m;
+            assert c.__file__.endswith('.so'), c.__file__;
+            assert m.__file__.endswith('.so'), m.__file__" &&
+            python -m pytest {package}/tests_python/test_frame_eval_and_tracing.py
+            {package}/tests_python/test_frame_evaluator.py
+            {package}/tests_python/test_sys_monitoring.py
+            {package}/tests_python/test_tracing_gotchas.py
+            {package}/tests_python/test_tracing_on_top_level.py
+            {package}/tests_python/test_bytecode_manipulation.py
+            {package}/tests_python/test_safe_repr.py
+            {package}/tests_python/test_additional_thread_info.py
+
+      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
+        with:
+          name: pydevd-${{ env.PYDEVD_VERSION }}-${{ matrix.python }}-manylinux_riscv64
+          path: wheelhouse/*.whl
+          if-no-files-found: error
+
+  publish:
+    name: Publish pydevd ${{ inputs.version || '3.5.0' }}
+    needs: [setup, build_wheels]
+    permissions:
+      contents: write
+      pull-requests: write
+    uses: $/.github/workflows/_publish-wheel.yml
+    with:
+      artifact-pattern: pydevd-${{ inputs.version || '3.5.0' }}-*-manylinux_riscv64