ci: auto-publish a GitHub Release on every merge to master (#4)

Each merge patch-bumps the version and cuts a release with auto-generated
notes. Releases show up in followers' feeds and notify watchers — recurring,
hands-off discoverability. Add "[skip release]" to a commit to skip one.

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

Author: burrows99

.github/workflows/release.yml

@@ -0,0 +1,50 @@
+name: Auto Release
+
+# Every merge to master publishes a GitHub Release with auto-generated notes.
+# Releases surface in the feeds of people who follow you and notify everyone
+# watching the repo — the closest GitHub has to "posting" an update, and it
+# keeps the repo looking active for discovery. Include "[skip release]" in a
+# merge/commit message to skip a given release.
+on:
+  push:
+    branches: [master]
+
+permissions:
+  contents: write
+
+concurrency:
+  group: auto-release
+  cancel-in-progress: false
+
+jobs:
+  release:
+    if: "!contains(github.event.head_commit.message, '[skip release]')"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0 # need full history + tags to compute the next version
+
+      - name: Compute next version (patch bump)
+        id: ver
+        run: |
+          latest="$(git tag -l 'v[0-9]*.[0-9]*.[0-9]*' --sort=-v:refname | head -n1)"
+          if [ -z "$latest" ]; then
+            next="v0.1.0"
+          else
+            v="${latest#v}"
+            major="${v%%.*}"; rest="${v#*.}"; minor="${rest%%.*}"; patch="${rest##*.}"
+            next="v${major}.${minor}.$((patch + 1))"
+          fi
+          echo "tag=$next" >> "$GITHUB_OUTPUT"
+          echo "Next release: $next (previous: ${latest:-none})"
+
+      - name: Publish release
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          gh release create "${{ steps.ver.outputs.tag }}" \
+            --repo "${{ github.repository }}" \
+            --target "${{ github.sha }}" \
+            --title "${{ steps.ver.outputs.tag }}" \
+            --generate-notes