feat: maturin — bundle Rust binary in Python wheel, matrix CI builds

- Rename binary devsper → devsper-runtime (no collision with Python entry point)
- Switch python/ build backend hatchling → maturin (bindings=bin)
- CI: 5-platform matrix (linux x64/arm64, mac x64/arm64, win x64)
- pip install devsper now ships devsper-runtime binary, zero extra steps

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: rithulkamesh

.github/workflows/publish.yml

@@ -90,31 +90,55 @@ jobs:
       - name: Publish devsper-bin
         run: cargo publish -p devsper-bin --no-verify || true
 
+  build-wheels:
+    name: Build wheels (${{ matrix.target }})
+    needs: test
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-latest
+            target: x86_64-unknown-linux-gnu
+          - os: ubuntu-latest
+            target: aarch64-unknown-linux-gnu
+          - os: macos-latest
+            target: x86_64-apple-darwin
+          - os: macos-latest
+            target: aarch64-apple-darwin
+          - os: windows-latest
+            target: x86_64-pc-windows-msvc
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: PyO3/maturin-action@v1
+        with:
+          target: ${{ matrix.target }}
+          args: --release --out dist
+          working-directory: python
+          manylinux: auto
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: wheels-${{ matrix.target }}
+          path: python/dist/
+
   publish-pypi:
     name: Publish to PyPI
-    needs: test
+    needs: build-wheels
     runs-on: ubuntu-latest
     environment:
       name: pypi
       url: https://pypi.org/project/devsper/
     permissions:
-      id-token: write  # required for trusted publisher (OIDC)
+      id-token: write
     steps:
-      - uses: actions/checkout@v4
-
-      - name: Set up Python
-        uses: actions/setup-python@v5
+      - uses: actions/download-artifact@v4
         with:
-          python-version: "3.11"
-
-      - name: Install build tools
-        run: pip install hatch
-
-      - name: Build wheel + sdist
-        working-directory: python
-        run: hatch build
+          pattern: wheels-*
+          merge-multiple: true
+          path: dist/
 
-      - name: Publish to PyPI (trusted publisher)
-        uses: pypa/gh-action-pypi-publish@release/v1
+      - uses: pypa/gh-action-pypi-publish@release/v1
         with:
-          packages-dir: python/dist/
+          packages-dir: dist/

crates/devsper-bin/Cargo.toml

@@ -11,7 +11,7 @@ version.workspace = true
 edition.workspace = true
 
 [[bin]]
-name = "devsper"
+name = "devsper-runtime"
 path = "src/main.rs"
 
 [dependencies]

python/pyproject.toml

@@ -1,10 +1,10 @@
 [build-system]
-requires = ["hatchling"]
-build-backend = "hatchling.build"
+requires = ["maturin>=1.7"]
+build-backend = "maturin"
 
 [project]
 name = "devsper"
-version = "3.0.1"
+version = "3.0.2"
 description = "Devsper runtime CLI — self-evolving AI workflow engine"
 readme = "README.md"
 requires-python = ">=3.11"
@@ -35,5 +35,8 @@ eval = [
 [project.scripts]
 devsper = "devsper.cli:main"
 
-[tool.hatch.build.targets.wheel]
-packages = ["devsper"]
+[tool.maturin]
+bindings = "bin"
+manifest-path = "../crates/devsper-bin/Cargo.toml"
+python-packages = ["devsper"]
+strip = true