Add GitHub Actions workflow for automated PyPI publishing

Author: modpotato

.github/workflows/publish.yml

@@ -0,0 +1,53 @@
+on:
+name: Publish to PyPI
+
+on:
+  push:
+    tags:
+      - "v*"
+  workflow_dispatch:
+
+permissions:
+  contents: write
+  id-token: write
+
+jobs:
+  build-and-release:
+    runs-on: ubuntu-latest
+    environment: release
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Install uv
+        uses: astral-sh/setup-uv@v2
+
+      - name: Sync dependencies
+        run: uv sync --all-extras --dev
+
+      - name: Run packaging checks
+        run: uv run python -m compileall copilot_proxy
+
+      - name: Build distributions
+        run: uv build
+
+      - name: Validate metadata
+        run: uvx twine check dist/*
+
+      - name: Publish to PyPI
+        if: github.event_name == 'push'
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          packages-dir: dist
+          verbose: true
+
+      - name: Create GitHub release
+        if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/')
+        uses: softprops/action-gh-release@v2
+        with:
+          tag_name: ${{ github.ref_name }}
+          generate_release_notes: true
+          files: |
+            dist/copilot_proxy-*.tar.gz
+            dist/copilot_proxy-*.whl

README.md

@@ -140,6 +140,20 @@ Use `uv run pytest` (once tests are added) or `uvx ruff check .` for linting.
 
 Both `uv publish` commands expect the relevant API token to be available in the `UV_PUBLISH_TOKEN` environment variable.
 
+### GitHub Actions trusted publisher
+
+This repository includes `.github/workflows/publish.yml`, which builds and uploads releases automatically on GitHub tag releases. To enable it:
+
+1. Create a PyPI trusted publisher (pending or project-specific) pointing at:
+   - **Project**: `copilot-proxy`
+   - **Owner**: `modpotato`
+   - **Repository**: `copilot-proxy`
+   - **Workflow**: `publish.yml`
+   - **Environment**: `release`
+2. In GitHub, create the matching repository environment (`Settings → Environments → New environment → release`).
+3. Push a tag (e.g. `v0.1.0`) to GitHub (`git push origin v0.1.0`). The workflow will build with `uv`, publish to PyPI via OIDC, and create the GitHub release automatically.
+4. For dry runs, use the **Run workflow** button; the manual dispatch builds and validates without publishing or creating a release.
+
 ## License
 
 This project is licensed under the MIT License - see the LICENSE file for details.