docs: update changelog for prepare and publish actions

Add two focused subdirectory composite actions:

- prepare/action.yml: downloads the vociferate binary, runs it to update
  changelog and release-version, then commits, tags, and pushes — replacing
  the boilerplate git steps consumers previously had to write inline.

- publish/action.yml: extracts the matching changelog section and creates or
  updates the Gitea/GitHub release. Outputs release-id, tag, and version so
  consumers can upload their own assets after it runs.

Simplify the vociferate workflows to use ./prepare and ./publish directly,
validating both actions in the self-release pipeline.

Update README to show the clean two-action usage pattern.

.gitea/workflows/do-release.yml

@@ -22,8 +22,8 @@ jobs:
     runs-on: ubuntu-latest
     container: docker.io/catthehacker/ubuntu:act-latest
     outputs:
-      tag: ${{ steps.resolve-tag.outputs.tag }}
+      tag: ${{ steps.publish.outputs.tag }}
-      version: ${{ steps.resolve-tag.outputs.version }}
+      version: ${{ steps.publish.outputs.version }}
     defaults:
       run:
         shell: bash
@@ -36,35 +36,12 @@ jobs:
           fetch-depth: 0
           ref: ${{ github.ref }}
 
-      - name: Resolve release tag
-        id: resolve-tag
-        env:
-          INPUT_TAG: ${{ inputs.tag }}
-          GITHUB_REF_VALUE: ${{ github.ref }}
-        run: |
-          set -euo pipefail
-
-          provided_tag="$(printf '%s' "${INPUT_TAG:-}" | sed 's/^[[:space:]]\+//; s/[[:space:]]\+$//')"
-          if [[ -n "$provided_tag" ]]; then
-            normalized_version="${provided_tag#v}"
-            tag="v${normalized_version}"
-          elif [[ "${GITHUB_REF_VALUE}" == refs/tags/* ]]; then
-            tag="${GITHUB_REF_VALUE#refs/tags/}"
-            normalized_version="${tag#v}"
-          else
-            echo "A tag input is required when the workflow is not running from a tag push" >&2
-            exit 1
-          fi
-
-          echo "tag=$tag" >> "$GITHUB_OUTPUT"
-          echo "version=$normalized_version" >> "$GITHUB_OUTPUT"
-
       - name: Checkout requested tag
         if: ${{ inputs.tag != '' }}
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
-          ref: refs/tags/${{ steps.resolve-tag.outputs.tag }}
+          ref: ${{ startsWith(inputs.tag, 'v') && format('refs/tags/{0}', inputs.tag) || format('refs/tags/v{0}', inputs.tag) }}
 
       - name: Setup Go
         uses: actions/setup-go@v5
@@ -74,90 +51,16 @@ jobs:
           cache: true
           cache-dependency-path: go.sum
 
-      - name: Extract release notes from changelog
-        id: release-notes
-        env:
-          RELEASE_VERSION: ${{ steps.resolve-tag.outputs.version }}
-        run: |
-          set -euo pipefail
-
-          release_notes="$(awk -v version="$RELEASE_VERSION" '
-            $0 ~ "^## \\[" version "\\] - " {capture=1}
-            capture {
-              if ($0 ~ "^## \\[" && $0 !~ "^## \\[" version "\\] - ") exit
-              print
-            }
-          ' changelog.md)"
-
-          if [[ -z "${release_notes//[[:space:]]/}" ]]; then
-            echo "Release notes section for ${RELEASE_VERSION} was not found in changelog.md" >&2
-            exit 1
-          fi
-
-          notes_file="$RUNNER_TEMP/release-notes.md"
-          printf '%s\n' "$release_notes" > "$notes_file"
-
-          echo "notes_file=$notes_file" >> "$GITHUB_OUTPUT"
-
       - name: Create or update release
-        id: release
+        id: publish
-        env:
+        uses: ./publish
-          TAG_NAME: ${{ steps.resolve-tag.outputs.tag }}
+        with:
-          RELEASE_NOTES_FILE: ${{ steps.release-notes.outputs.notes_file }}
+          token: ${{ secrets.GITHUB_TOKEN }}
-        run: |
+          version: ${{ inputs.tag }}
-          set -euo pipefail
-
-          release_notes="$(cat "$RELEASE_NOTES_FILE")"
-          escaped_release_notes="$(printf '%s' "$release_notes" | sed 's/\\/\\\\/g; s/"/\\"/g; :a;N;$!ba;s/\n/\\n/g')"
-          release_api="${GITHUB_API_URL:-${GITHUB_SERVER_URL%/}/api/v1}/repos/${GITHUB_REPOSITORY}/releases"
-          release_by_tag_api="${release_api}/tags/${TAG_NAME}"
-
-          status_code="$(curl -sS -o release-existing.json -w '%{http_code}' \
-            -H "Authorization: token ${RELEASE_TOKEN}" \
-            -H "Content-Type: application/json" \
-            "${release_by_tag_api}")"
-
-          if [[ "$status_code" == "200" ]]; then
-            existing_release_id="$(sed -n 's/.*"id"[[:space:]]*:[[:space:]]*\([0-9][0-9]*\).*/\1/p' release-existing.json | head -n 1)"
-            if [[ -z "$existing_release_id" ]]; then
-              echo "Failed to parse existing release id for ${TAG_NAME}" >&2
-              cat release-existing.json >&2
-              exit 1
-            fi
-
-            curl --fail-with-body \
-              -X PATCH \
-              -H "Authorization: token ${RELEASE_TOKEN}" \
-              -H "Content-Type: application/json" \
-              "${release_api}/${existing_release_id}" \
-              --data "{\"tag_name\":\"${TAG_NAME}\",\"target\":\"${GITHUB_SHA}\",\"name\":\"${TAG_NAME}\",\"body\":\"${escaped_release_notes}\",\"draft\":false,\"prerelease\":false}" \
-              --output release.json
-          elif [[ "$status_code" != "404" ]]; then
-            echo "Unexpected response while checking release ${TAG_NAME}: HTTP ${status_code}" >&2
-            cat release-existing.json >&2
-            exit 1
-          else
-            curl --fail-with-body \
-              -X POST \
-              -H "Authorization: token ${RELEASE_TOKEN}" \
-              -H "Content-Type: application/json" \
-              "${release_api}" \
-              --data "{\"tag_name\":\"${TAG_NAME}\",\"target\":\"${GITHUB_SHA}\",\"name\":\"${TAG_NAME}\",\"body\":\"${escaped_release_notes}\",\"draft\":false,\"prerelease\":false}" \
-              --output release.json
-          fi
-
-          release_id="$(sed -n 's/.*"id"[[:space:]]*:[[:space:]]*\([0-9][0-9]*\).*/\1/p' release.json | head -n 1)"
-          if [[ -z "$release_id" ]]; then
-            echo "Failed to parse release id from API response" >&2
-            cat release.json >&2
-            exit 1
-          fi
-
-          echo "id=$release_id" >> "$GITHUB_OUTPUT"
 
       - name: Build release binaries
         env:
-          RELEASE_VERSION: ${{ steps.resolve-tag.outputs.version }}
+          RELEASE_VERSION: ${{ steps.publish.outputs.version }}
         run: |
           set -euo pipefail
 
@@ -178,7 +81,8 @@ jobs:
 
       - name: Upload release binaries
         env:
-          RELEASE_ID: ${{ steps.release.outputs.id }}
+          RELEASE_ID: ${{ steps.publish.outputs.release-id }}
+          RELEASE_VERSION: ${{ steps.publish.outputs.version }}
         run: |
           set -euo pipefail
 
@@ -213,8 +117,8 @@ jobs:
 
       - name: Summarize published release
         env:
-          TAG_NAME: ${{ steps.resolve-tag.outputs.tag }}
+          TAG_NAME: ${{ steps.publish.outputs.tag }}
-          RELEASE_VERSION: ${{ steps.resolve-tag.outputs.version }}
+          RELEASE_VERSION: ${{ steps.publish.outputs.version }}
         run: |
           set -euo pipefail
 

.gitea/workflows/prepare-release.yml

@@ -21,8 +21,6 @@ jobs:
     defaults:
       run:
         shell: bash
-    env:
-      RELEASE_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -37,91 +35,20 @@ jobs:
           cache: true
           cache-dependency-path: go.sum
 
-      - name: Resolve release version
-        id: resolve-version
-        env:
-          INPUT_VERSION: ${{ inputs.version }}
-        run: |
-          set -euo pipefail
-
-          provided_version="$(printf '%s' "${INPUT_VERSION:-}" | sed 's/^[[:space:]]\+//; s/[[:space:]]\+$//')"
-
-          if [[ -n "$provided_version" ]]; then
-            release_version="$provided_version"
-          else
-            if ! release_version="$(go run ./cmd/vociferate --recommend --root . 2>release-recommendation.err)"; then
-              recommendation_error="$(tr '\n' ' ' < release-recommendation.err | sed 's/[[:space:]]\+/ /g' | sed 's/^ //; s/ $//')"
-              echo "Resolve release version: ${recommendation_error}" >&2
-              exit 1
-            fi
-          fi
-
-          echo "RELEASE_VERSION=$release_version" >> "$GITHUB_ENV"
-          echo "version=$release_version" >> "$GITHUB_OUTPUT"
-
-      - name: Prepare release files
-        run: |
-          set -euo pipefail
-          go run ./cmd/vociferate \
-            --root . \
-            --version "$RELEASE_VERSION" \
-            --date "$(date -u +%F)" \
-            --changelog changelog.md
-
       - name: Run tests
-        run: |
+        run: go test ./...
-          set -euo pipefail
-          go test ./...
 
-      - name: Configure git author
+      - name: Prepare and tag release
-        run: |
+        id: prepare
-          set -euo pipefail
+        uses: ./prepare
-          git config user.name "gitea-actions[bot]"
+        with:
-          git config user.email "gitea-actions[bot]@users.noreply.local"
+          version: ${{ inputs.version }}
-
+          token: ${{ secrets.GITHUB_TOKEN }}
-      - name: Commit release changes and push tag
-        run: |
-          set -euo pipefail
-
-          normalized_version="${RELEASE_VERSION#v}"
-          tag="v${normalized_version}"
-
-          if git rev-parse "$tag" >/dev/null 2>&1; then
-            echo "Tag ${tag} already exists" >&2
-            exit 1
-          fi
-
-          case "$GITHUB_SERVER_URL" in
-            https://*)
-              authed_remote="https://oauth2:${RELEASE_TOKEN}@${GITHUB_SERVER_URL#https://}/${GITHUB_REPOSITORY}.git"
-              ;;
-            http://*)
-              authed_remote="http://oauth2:${RELEASE_TOKEN}@${GITHUB_SERVER_URL#http://}/${GITHUB_REPOSITORY}.git"
-              ;;
-            *)
-              echo "Unsupported GITHUB_SERVER_URL: ${GITHUB_SERVER_URL}" >&2
-              exit 1
-              ;;
-          esac
-
-          git remote set-url origin "$authed_remote"
-          git add changelog.md release-version
-          git commit -m "release: prepare ${tag}"
-          git tag "$tag"
-          git push origin HEAD
-          git push origin "$tag"
 
       - name: Summarize prepared release
         run: |
           set -euo pipefail
-
+          tag="${{ steps.prepare.outputs.version }}"
-          normalized_version="${RELEASE_VERSION#v}"
-          tag="v${normalized_version}"
-
           {
             echo "## Release Prepared"
             echo
-            echo "- Updated files were committed to main."
-            echo "- Tag pushed: ${tag}"
-            echo "- The tag-triggered Do Release workflow will create or update the release and publish binaries."
-          } >> "$GITHUB_STEP_SUMMARY"

README.md

@@ -81,24 +81,10 @@ If a release already exists for the same tag, the workflow updates its release n
 
 ## Reuse In Other Repositories
 
-You can reuse vociferate in two ways.
+Vociferate ships two composite actions that together cover the full release flow.
+Pin both to the same released tag.
 
-Use the composite action directly in your prepare workflow:
+### `prepare` — update files, commit, and push tag
-
-```yaml
-- name: Prepare release files
-  uses: git.hrafn.xyz/aether/vociferate@v1.0.0
-  with:
-    version-file: internal/myapp/version/version.go
-    version-pattern: 'const Version = "([^"]+)"'
-    changelog: changelog.md
-```
-
-Set `version` only when you want to override the recommended version.
-Pin the composite action to a released tag. It downloads a prebuilt Linux binary from vociferate releases and caches it on the runner, so it does not require installing Go.
-For repositories using changelog-based versioning (the default), omit `version-file` and `version-pattern` entirely. Only set them for repositories that embed the version inside source code.
-
-A complete release setup should also split preparation from publication. For example:
 
 ```yaml
 name: Prepare Release
@@ -118,73 +104,67 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Prepare release files
+      - uses: git.hrafn.xyz/aether/vociferate/prepare@v1.0.0
-        id: prepare
-        uses: git.hrafn.xyz/aether/vociferate@v1.0.0
         with:
           version: ${{ inputs.version }}
+          token: ${{ secrets.GITHUB_TOKEN }}
+```
 
-      - name: Commit and push prepared release
+Downloads a prebuilt vociferate binary, runs it to update `changelog.md` and
+`release-version`, then commits those changes to the default branch and pushes
+the release tag. Does not require Go on the runner.
+
+For repositories that embed the version inside source code, pass `version-file`
+and `version-pattern`:
+
+```yaml
+- uses: git.hrafn.xyz/aether/vociferate/prepare@v1.0.0
+  with:
+    version-file: internal/myapp/version/version.go
+    version-pattern: 'const Version = "([^"]+)"'
+    git-add-files: changelog.md internal/myapp/version/version.go
+    token: ${{ secrets.GITHUB_TOKEN }}
+```
+
+### `publish` — create release with changelog notes
+
+```yaml
+name: Do Release
+
+on:
+  push:
+    tags:
+      - "v*.*.*"
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: git.hrafn.xyz/aether/vociferate/publish@v1.0.0
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+```
+
+Reads the matching section from `changelog.md` and creates or updates the
+Gitea/GitHub release with those notes. The `version` input is optional — when
+omitted it is derived from the current tag ref automatically.
+
+The `publish` action outputs `release-id` so you can upload additional release
+assets after it runs:
+
+```yaml
+- id: publish
+  uses: git.hrafn.xyz/aether/vociferate/publish@v1.0.0
+  with:
+    token: ${{ secrets.GITHUB_TOKEN }}
+
+- name: Upload my binary
   run: |
-          set -euo pipefail
+    curl --fail-with-body -X POST \
-          tag="${{ steps.prepare.outputs.version }}"
+      -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
-          git config user.name "gitea-actions[bot]"
+      -H "Content-Type: application/octet-stream" \
-          git config user.email "gitea-actions[bot]@users.noreply.local"
+      "${{ github.api_url }}/repos/${{ github.repository }}/releases/${{ steps.publish.outputs.release-id }}/assets?name=myapp" \
-          git add changelog.md release-version
+      --data-binary "@dist/myapp"
-          git commit -m "release: prepare ${tag}"
-          git tag "$tag"
-          git push origin HEAD
-          git push origin "$tag"
-```
-
-Then use a separate tag workflow to publish the release from the tagged revision:
-
-```yaml
-name: Do Release
-
-on:
-  push:
-    tags:
-      - "v*.*.*"
-
-jobs:
-  release:
-    uses: aether/vociferate/.gitea/workflows/do-release.yml@main
-    secrets: inherit
-```
-
-Call the reusable prepare workflow:
-
-```yaml
-name: Prepare Release
-
-on:
-  workflow_dispatch:
-    inputs:
-      version:
-        description: Optional semantic version override.
-        required: false
-
-jobs:
-  release:
-    uses: aether/vociferate/.gitea/workflows/prepare-release.yml@main
-    with:
-      version: ${{ inputs.version }}
-    secrets: inherit
-```
-
-And publish from tags with:
-
-```yaml
-name: Do Release
-
-on:
-  push:
-    tags:
-      - "v*.*.*"
-
-jobs:
-  release:
-    uses: aether/vociferate/.gitea/workflows/do-release.yml@main
-    secrets: inherit
 ```

changelog.md

@@ -13,6 +13,11 @@ A `### Breaking` section is used in addition to Keep a Changelog's standard sect
 
 ### Changed
 
+- Two dedicated subdirectory composite actions replace the boilerplate inline workflow steps: `prepare/action.yml` runs vociferate, commits updated files, and pushes the release tag; `publish/action.yml` extracts release notes from the changelog and creates or updates the release. Consumer repositories need only a checkout step and a single `uses:` call per workflow stage.
+- `publish/action.yml` outputs `release-id`, `tag`, and `version` so consumers can upload their own release assets after the release is created.
+- `prepare/action.yml` accepts a `git-add-files` input so repositories using a custom `version-file` can stage the correct set of files for the release commit.
+- The `prepare-release.yml` and `do-release.yml` vociferate workflows now use the local `./prepare` and `./publish` actions, validating the actions in the self-release pipeline.
+
 - Release version recommendation now reads the current version from the most recent released section in the changelog instead of requiring a separate version file. When no prior releases exist the version defaults to `0.0.0`, yielding `v1.0.0` as the first recommended tag.
 - `vociferate prepare` creates the `release-version` file if it does not already exist, removing the need to pre-seed it in new repositories.
 - Release automation is now split into a prepare workflow that updates and tags `main`, and a tag-driven publish workflow that creates the release from the tagged revision.

prepare/action.yml

@@ -0,0 +1,210 @@
+name: vociferate/prepare
+description: >
+  Download vociferate, prepare release files, then commit, tag, and push.
+  The repository must be checked out before this action runs.
+
+inputs:
+  token:
+    description: >
+      Token used to download the vociferate binary and to push the release
+      commit and tag. Defaults to the workflow token.
+    required: false
+    default: ''
+  version:
+    description: >
+      Optional semantic version override (with or without leading v). When
+      omitted, the recommended next version is derived from the changelog.
+    required: false
+    default: ''
+  version-file:
+    description: >
+      Path to version file relative to repository root. When omitted, the
+      current version is derived from the most recent released section in
+      the changelog.
+    required: false
+    default: ''
+  version-pattern:
+    description: >
+      Regular expression with one capture group containing the version value.
+      Only required when version-file is set.
+    required: false
+    default: ''
+  changelog:
+    description: Path to changelog file relative to repository root.
+    required: false
+    default: changelog.md
+  git-user-name:
+    description: Name for the release commit author.
+    required: false
+    default: 'gitea-actions[bot]'
+  git-user-email:
+    description: Email for the release commit author.
+    required: false
+    default: 'gitea-actions[bot]@users.noreply.local'
+  git-add-files:
+    description: >
+      Space-separated list of file paths to stage for the release commit.
+      Defaults to changelog.md and release-version. Adjust when using a
+      custom version-file.
+    required: false
+    default: 'changelog.md release-version'
+
+outputs:
+  version:
+    description: >
+      The resolved version tag (e.g. v1.2.3) that was committed and pushed.
+    value: ${{ steps.run-vociferate.outputs.version }}
+
+runs:
+  using: composite
+  steps:
+    - name: Resolve vociferate binary metadata
+      id: resolve-binary
+      shell: bash
+      env:
+        ACTION_REF: ${{ github.action_ref }}
+        SERVER_URL: ${{ github.server_url }}
+        API_URL: ${{ github.api_url }}
+        TOKEN: ${{ inputs.token != '' && inputs.token || github.token }}
+        RUNNER_ARCH: ${{ runner.arch }}
+        RUNNER_TEMP: ${{ runner.temp }}
+      run: |
+        set -euo pipefail
+
+        case "$RUNNER_ARCH" in
+          X64)   arch="amd64" ;;
+          ARM64) arch="arm64" ;;
+          *)
+            echo "Unsupported runner architecture: $RUNNER_ARCH" >&2
+            exit 1
+            ;;
+        esac
+
+        release_tag="$ACTION_REF"
+        if [[ -z "$release_tag" || "$release_tag" == refs/* || "$release_tag" != v* ]]; then
+          release_tag="$(curl -fsSL \
+            -H "Authorization: token ${TOKEN}" \
+            -H "Content-Type: application/json" \
+            "${API_URL}/repos/aether/vociferate/releases/latest" | sed -n 's/.*"tag_name"[[:space:]]*:[[:space:]]*"\([^"]*\)".*/\1/p' | head -n 1)"
+        fi
+
+        if [[ -z "$release_tag" ]]; then
+          echo "Unable to resolve a vociferate release tag for binary download" >&2
+          exit 1
+        fi
+
+        normalized_version="${release_tag#v}"
+        asset_name="vociferate_${normalized_version}_linux_${arch}"
+        cache_dir="${RUNNER_TEMP}/vociferate/${release_tag}/linux-${arch}"
+        binary_path="${cache_dir}/vociferate"
+        asset_url="${SERVER_URL}/aether/vociferate/releases/download/${release_tag}/${asset_name}"
+
+        mkdir -p "$cache_dir"
+
+        echo "release_tag=$release_tag"   >> "$GITHUB_OUTPUT"
+        echo "asset_name=$asset_name"     >> "$GITHUB_OUTPUT"
+        echo "asset_url=$asset_url"       >> "$GITHUB_OUTPUT"
+        echo "cache_dir=$cache_dir"       >> "$GITHUB_OUTPUT"
+        echo "binary_path=$binary_path"   >> "$GITHUB_OUTPUT"
+
+    - name: Restore cached vociferate binary
+      id: cache-vociferate
+      uses: actions/cache@v4
+      with:
+        path: ${{ steps.resolve-binary.outputs.cache_dir }}
+        key: vociferate-${{ steps.resolve-binary.outputs.release_tag }}-linux-${{ runner.arch }}
+
+    - name: Download vociferate binary
+      if: steps.cache-vociferate.outputs.cache-hit != 'true'
+      shell: bash
+      env:
+        TOKEN: ${{ inputs.token != '' && inputs.token || github.token }}
+        ASSET_URL: ${{ steps.resolve-binary.outputs.asset_url }}
+        BINARY_PATH: ${{ steps.resolve-binary.outputs.binary_path }}
+      run: |
+        set -euo pipefail
+
+        curl --fail --location \
+          -H "Authorization: token ${TOKEN}" \
+          -o "$BINARY_PATH" \
+          "$ASSET_URL"
+        chmod +x "$BINARY_PATH"
+
+    - name: Run vociferate
+      id: run-vociferate
+      shell: bash
+      env:
+        VOCIFERATE_BIN: ${{ steps.resolve-binary.outputs.binary_path }}
+        INPUT_VERSION: ${{ inputs.version }}
+      run: |
+        set -euo pipefail
+
+        common_args=(--root .)
+
+        if [[ -n "${{ inputs.version-file }}" ]]; then
+          common_args+=(--version-file "${{ inputs.version-file }}")
+        fi
+
+        if [[ -n "${{ inputs.version-pattern }}" ]]; then
+          common_args+=(--version-pattern "${{ inputs.version-pattern }}")
+        fi
+
+        if [[ -n "${{ inputs.changelog }}" ]]; then
+          common_args+=(--changelog "${{ inputs.changelog }}")
+        fi
+
+        provided_version="$(printf '%s' "${INPUT_VERSION:-}" | sed 's/^[[:space:]]\+//; s/[[:space:]]\+$//')"
+        if [[ -z "$provided_version" ]]; then
+          provided_version="$("$VOCIFERATE_BIN" "${common_args[@]}" --recommend)"
+        fi
+
+        normalized_version="${provided_version#v}"
+        tag="v${normalized_version}"
+
+        "$VOCIFERATE_BIN" "${common_args[@]}" --version "$provided_version" --date "$(date -u +%F)"
+
+        echo "version=$tag" >> "$GITHUB_OUTPUT"
+
+    - name: Commit and push release
+      shell: bash
+      env:
+        TOKEN: ${{ inputs.token != '' && inputs.token || github.token }}
+        GIT_USER_NAME: ${{ inputs.git-user-name }}
+        GIT_USER_EMAIL: ${{ inputs.git-user-email }}
+        GIT_ADD_FILES: ${{ inputs.git-add-files }}
+        RELEASE_TAG: ${{ steps.run-vociferate.outputs.version }}
+        GITHUB_SERVER_URL: ${{ github.server_url }}
+        GITHUB_REPOSITORY: ${{ github.repository }}
+      run: |
+        set -euo pipefail
+
+        if git rev-parse "$RELEASE_TAG" >/dev/null 2>&1; then
+          echo "Tag ${RELEASE_TAG} already exists" >&2
+          exit 1
+        fi
+
+        case "$GITHUB_SERVER_URL" in
+          https://*)
+            authed_remote="https://oauth2:${TOKEN}@${GITHUB_SERVER_URL#https://}/${GITHUB_REPOSITORY}.git"
+            ;;
+          http://*)
+            authed_remote="http://oauth2:${TOKEN}@${GITHUB_SERVER_URL#http://}/${GITHUB_REPOSITORY}.git"
+            ;;
+          *)
+            echo "Unsupported GITHUB_SERVER_URL: ${GITHUB_SERVER_URL}" >&2
+            exit 1
+            ;;
+        esac
+
+        git config user.name  "$GIT_USER_NAME"
+        git config user.email "$GIT_USER_EMAIL"
+        git remote set-url origin "$authed_remote"
+
+        for f in $GIT_ADD_FILES; do
+          git add "$f"
+        done
+
+        git commit -m "release: prepare ${RELEASE_TAG}"
+        git tag "$RELEASE_TAG"
+        git push origin HEAD
+        git push origin "$RELEASE_TAG"

publish/action.yml

@@ -0,0 +1,152 @@
+name: vociferate/publish
+description: >
+  Extract release notes from the changelog and create or update a
+  Gitea/GitHub release. The repository must be checked out at the release
+  tag before this action runs.
+
+inputs:
+  token:
+    description: >
+      Token used to authenticate release API calls. Defaults to the
+      workflow token.
+    required: false
+    default: ''
+  version:
+    description: >
+      Semantic version to publish (with or without leading v). When omitted,
+      derived from the current git tag ref.
+    required: false
+    default: ''
+  changelog:
+    description: Path to changelog file relative to repository root.
+    required: false
+    default: changelog.md
+
+outputs:
+  release-id:
+    description: Numeric ID of the created or updated release.
+    value: ${{ steps.create-release.outputs.id }}
+  tag:
+    description: The tag used for the release (e.g. v1.2.3).
+    value: ${{ steps.resolve-version.outputs.tag }}
+  version:
+    description: The bare version string without leading v (e.g. 1.2.3).
+    value: ${{ steps.resolve-version.outputs.version }}
+
+runs:
+  using: composite
+  steps:
+    - name: Resolve release version
+      id: resolve-version
+      shell: bash
+      env:
+        INPUT_VERSION: ${{ inputs.version }}
+        GITHUB_REF_VALUE: ${{ github.ref }}
+      run: |
+        set -euo pipefail
+
+        provided="$(printf '%s' "${INPUT_VERSION:-}" | sed 's/^[[:space:]]\+//; s/[[:space:]]\+$//')"
+        if [[ -n "$provided" ]]; then
+          normalized="${provided#v}"
+          tag="v${normalized}"
+        elif [[ "${GITHUB_REF_VALUE}" == refs/tags/* ]]; then
+          tag="${GITHUB_REF_VALUE#refs/tags/}"
+          normalized="${tag#v}"
+        else
+          echo "A version input is required when the workflow is not running from a tag push" >&2
+          exit 1
+        fi
+
+        echo "tag=$tag"           >> "$GITHUB_OUTPUT"
+        echo "version=$normalized" >> "$GITHUB_OUTPUT"
+
+    - name: Extract release notes from changelog
+      id: extract-notes
+      shell: bash
+      env:
+        CHANGELOG: ${{ inputs.changelog != '' && inputs.changelog || 'changelog.md' }}
+        RELEASE_VERSION: ${{ steps.resolve-version.outputs.version }}
+        RUNNER_TEMP: ${{ runner.temp }}
+      run: |
+        set -euo pipefail
+
+        release_notes="$(awk -v version="$RELEASE_VERSION" '
+          $0 ~ "^## \\[" version "\\] - " {capture=1}
+          capture {
+            if ($0 ~ "^## \\[" && $0 !~ "^## \\[" version "\\] - ") exit
+            print
+          }
+        ' "$CHANGELOG")"
+
+        if [[ -z "${release_notes//[[:space:]]/}" ]]; then
+          echo "Release notes section for ${RELEASE_VERSION} was not found in ${CHANGELOG}" >&2
+          exit 1
+        fi
+
+        notes_file="${RUNNER_TEMP}/release-notes.md"
+        printf '%s\n' "$release_notes" > "$notes_file"
+        echo "notes_file=$notes_file" >> "$GITHUB_OUTPUT"
+
+    - name: Create or update release
+      id: create-release
+      shell: bash
+      env:
+        TOKEN: ${{ inputs.token != '' && inputs.token || github.token }}
+        TAG_NAME: ${{ steps.resolve-version.outputs.tag }}
+        RELEASE_NOTES_FILE: ${{ steps.extract-notes.outputs.notes_file }}
+        GITHUB_API_URL: ${{ github.api_url }}
+        GITHUB_SERVER_URL: ${{ github.server_url }}
+        GITHUB_SHA: ${{ github.sha }}
+        GITHUB_REPOSITORY: ${{ github.repository }}
+      run: |
+        set -euo pipefail
+
+        release_notes="$(cat "$RELEASE_NOTES_FILE")"
+        escaped_release_notes="$(printf '%s' "$release_notes" | sed 's/\\/\\\\/g; s/"/\\"/g; :a;N;$!ba;s/\n/\\n/g')"
+        release_api="${GITHUB_API_URL:-${GITHUB_SERVER_URL%/}/api/v1}/repos/${GITHUB_REPOSITORY}/releases"
+        release_by_tag_api="${release_api}/tags/${TAG_NAME}"
+
+        status_code="$(curl -sS -o release-existing.json -w '%{http_code}' \
+          -H "Authorization: token ${TOKEN}" \
+          -H "Content-Type: application/json" \
+          "${release_by_tag_api}")"
+
+        if [[ "$status_code" == "200" ]]; then
+          existing_release_id="$(sed -n 's/.*"id"[[:space:]]*:[[:space:]]*\([0-9][0-9]*\).*/\1/p' release-existing.json | head -n 1)"
+          if [[ -z "$existing_release_id" ]]; then
+            echo "Failed to parse existing release id for ${TAG_NAME}" >&2
+            cat release-existing.json >&2
+            exit 1
+          fi
+
+          curl --fail-with-body \
+            -X PATCH \
+            -H "Authorization: token ${TOKEN}" \
+            -H "Content-Type: application/json" \
+            "${release_api}/${existing_release_id}" \
+            --data "{\"tag_name\":\"${TAG_NAME}\",\"target\":\"${GITHUB_SHA}\",\"name\":\"${TAG_NAME}\",\"body\":\"${escaped_release_notes}\",\"draft\":false,\"prerelease\":false}" \
+            --output release.json
+
+          echo "id=$existing_release_id" >> "$GITHUB_OUTPUT"
+        elif [[ "$status_code" != "404" ]]; then
+          echo "Unexpected response while checking release ${TAG_NAME}: HTTP ${status_code}" >&2
+          cat release-existing.json >&2
+          exit 1
+        else
+          curl --fail-with-body \
+            -X POST \
+            -H "Authorization: token ${TOKEN}" \
+            -H "Content-Type: application/json" \
+            "${release_api}" \
+            --data "{\"tag_name\":\"${TAG_NAME}\",\"target\":\"${GITHUB_SHA}\",\"name\":\"${TAG_NAME}\",\"body\":\"${escaped_release_notes}\",\"draft\":false,\"prerelease\":false}" \
+            --output release.json
+
+          release_id="$(sed -n 's/.*"id"[[:space:]]*:[[:space:]]*\([0-9][0-9]*\).*/\1/p' release.json | head -n 1)"
+          if [[ -z "$release_id" ]]; then
+            echo "Failed to parse release id from API response" >&2
+            cat release.json >&2
+            exit 1
+          fi
+
+          echo "id=$release_id" >> "$GITHUB_OUTPUT"
+        fi