fix(publish): remove --abi3/--interpreter flags; abi3 via Cargo.toml feature

.github/workflows/publish.yml

@@ -5,14 +5,13 @@
 # same build + test steps that the `check` job in ci.yml runs.
 #
 # Publishes abi3 maturin wheels for:
-#   - linux  x86_64 + aarch64  (via QEMU)
-#   - macOS  x86_64 + arm64   (via two native runners, combined into universal2)
+#   - linux  x86_64 + aarch64  (via QEMU / manylinux)
+#   - macOS  universal2        (x86_64 + arm64 combined)
 #   - windows x86_64
 #
-# The wheel uses cp39 abi3 (--interpreter python3.9 --abi3) so one wheel covers
-# Python 3.9+ on each platform. pyproject.toml declares requires-python = ">=3.11"
-# which is still compatible (the abi3 tag is the build ABI floor, not the runtime
-# floor — pip enforces pyproject.toml's requires-python separately).
+# abi3 is activated by the `pyo3/abi3-py39` crate feature (set in Cargo.toml),
+# NOT by a --abi3 / --interpreter CLI flag to maturin. maturin detects the abi3
+# feature automatically and stamps the wheel tag `cp39-abi3`.
 
 name: publish
 
@@ -24,12 +23,10 @@ on:
     inputs:
       tag:
         description: "Tag to publish (e.g. v0.1.0)"
-        required: true
+        required: false
 
 env:
   CARGO_TERM_COLOR: always
-  # maturin needs this to pick the right Python for abi3 builds.
-  MATURIN_PYPI_TOKEN: ${{ secrets.PYPI_API_TOKEN }}
 
 jobs:
   # ── Linux x86_64 + aarch64 (manylinux) ───────────────────────────────────
@@ -44,19 +41,19 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: "3.11"
-      - name: build wheel (manylinux abi3)
+      - name: build wheel (manylinux, abi3 via pyo3/abi3-py39 crate feature)
         uses: PyO3/maturin-action@v1
         with:
           target: ${{ matrix.target }}
-          args: --release --out dist --features extension-module --interpreter python3.11 --abi3
+          args: --release --out dist --features extension-module
           manylinux: auto
           sccache: "true"
       - uses: actions/upload-artifact@v4
         with:
           name: wheels-linux-${{ matrix.target }}
           path: dist
 
-  # ── macOS x86_64 + arm64 (combined into universal2) ──────────────────────
+  # ── macOS universal2 (x86_64 + arm64 combined) ───────────────────────────
   macos:
     name: macos (universal2)
     runs-on: macos-latest
@@ -65,11 +62,11 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: "3.11"
-      - name: build wheel (universal2 abi3)
+      - name: build wheel (universal2, abi3 via pyo3/abi3-py39 crate feature)
         uses: PyO3/maturin-action@v1
         with:
           target: universal2-apple-darwin
-          args: --release --out dist --features extension-module --interpreter python3.11 --abi3
+          args: --release --out dist --features extension-module
           sccache: "true"
       - uses: actions/upload-artifact@v4
         with:
@@ -85,11 +82,11 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: "3.11"
-      - name: build wheel (abi3)
+      - name: build wheel (abi3 via pyo3/abi3-py39 crate feature)
         uses: PyO3/maturin-action@v1
         with:
           target: x86_64
-          args: --release --out dist --features extension-module --interpreter python3.11 --abi3
+          args: --release --out dist --features extension-module
           sccache: "true"
       - uses: actions/upload-artifact@v4
         with:
@@ -128,8 +125,12 @@ jobs:
           pattern: wheels-*
           merge-multiple: true
           path: dist
+      - name: list wheels
+        run: ls -la dist/
       - name: publish
         uses: PyO3/maturin-action@v1
         with:
           command: upload
           args: --non-interactive --skip-existing dist/*
+        env:
+          MATURIN_PYPI_TOKEN: ${{ secrets.PYPI_API_TOKEN }}