diff --git a/.github/workflows/build-ast-grep-py.yml b/.github/workflows/build-ast-grep-py.yml
new file mode 100644
index 000000000..675a6b989
--- /dev/null
+++ b/.github/workflows/build-ast-grep-py.yml
@@ -0,0 +1,101 @@
+# SPDX-FileCopyrightText: 2026 The RISE Project
+# SPDX-License-Identifier: MIT
+---
+# This workflow is based on:
+# https://github.com/ast-grep/ast-grep/blob/0.45.2/.github/workflows/pyo3.yml
+name: Build ast-grep-py wheels (riscv64)
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'ast-grep-py version to build (git tag, e.g. 0.45.2)'
+        required: true
+        default: '0.45.2'
+  pull_request:
+    paths:
+      - '.github/workflows/build-ast-grep-py.yml'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ inputs.version || '0.45.2' }}-${{ 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 0.45.2 there.
+  AST_GREP_PY_VERSION: ${{ inputs.version || '0.45.2' }}
+  MANYLINUX_RISCV64_IMAGE: quay.io/pypa/manylinux_2_39_riscv64
+
+jobs:
+  setup:
+    uses: $/.github/workflows/_setup.yml
+
+  build_wheels:
+    needs: [setup]
+    name: Build ast-grep-py ${{ inputs.version || '0.45.2' }} ${{ matrix.python }}-manylinux_riscv64
+    runs-on: ubuntu-24.04-riscv
+    timeout-minutes: 360
+    strategy:
+      fail-fast: false
+      matrix:
+        # No abi3 feature on pyo3 in crates/pyo3/Cargo.toml, so upstream
+        # ships one wheel per interpreter (matches PyPI's cp3xx-cp3xx tags).
+        python: ["cp312", "cp313", "cp314", "cp314t"]
+
+    steps:
+      # Checked out at the workspace root: crates/pyo3 is a member of the
+      # ast-grep Cargo workspace and builds against its sibling crates.
+      - name: Checkout ast-grep v${{ env.AST_GREP_PY_VERSION }}
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1  # v7.0.1
+        with:
+          repository: ast-grep/ast-grep
+          ref: ${{ env.AST_GREP_PY_VERSION }}
+          persist-credentials: false
+
+      - name: Stage LICENSE beside crates/pyo3's pyproject.toml
+        # maturin globs LICEN[CS]E* relative to the pyproject directory,
+        # which is crates/pyo3 -- so upstream's published wheel carries no
+        # licence text at all.
+        run: cp LICENSE crates/pyo3/LICENSE
+
+      - name: Build wheel
+        uses: pypa/cibuildwheel@1828c10ab37f080699c7b81cea34097c684a7074  # v4.2.0
+        with:
+          package-dir: crates/pyo3
+          output-dir: wheelhouse/
+          # musllinux is dropped: rustup.rs ships no riscv64 musl toolchain.
+          only: ${{ matrix.python }}-manylinux_riscv64
+        env:
+          CIBW_MANYLINUX_RISCV64_IMAGE: ${{ env.MANYLINUX_RISCV64_IMAGE }}
+          # ast-grep ships no [tool.cibuildwheel], so the Rust toolchain its
+          # maturin backend needs is installed in-container here.
+          CIBW_BEFORE_ALL_LINUX: >-
+            curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
+          CIBW_ENVIRONMENT_LINUX: PATH="$PATH:$HOME/.cargo/bin"
+          CIBW_TEST_REQUIRES: pytest
+          # test-sources resolves against the checkout root, not package-dir.
+          CIBW_TEST_SOURCES: crates/pyo3/tests crates/pyo3/pyproject.toml
+          CIBW_TEST_COMMAND: >-
+            cd crates/pyo3 &&
+            python -c "import ast_grep_py.ast_grep_py as m, importlib.metadata as md;
+            assert m.__file__.endswith('.so'), m.__file__;
+            assert {p.name for p in md.files('ast-grep-py') if 'licenses' in str(p)} == {'LICENSE'}" &&
+            python -m pytest -v tests
+
+      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
+        with:
+          name: ast-grep-py-${{ env.AST_GREP_PY_VERSION }}-${{ matrix.python }}-manylinux_riscv64
+          path: wheelhouse/*.whl
+          if-no-files-found: error
+
+  publish:
+    name: Publish ast-grep-py ${{ inputs.version || '0.45.2' }}
+    needs: [setup, build_wheels]
+    permissions:
+      contents: write
+      pull-requests: write
+    uses: $/.github/workflows/_publish-wheel.yml
+    with:
+      artifact-pattern: ast-grep-py-${{ inputs.version || '0.45.2' }}-*-manylinux_riscv64