Update changelog workflow to reject nightly builds (#20248)

.gemini/skills/docs-changelog/SKILL.md

@@ -59,6 +59,10 @@ To standardize the process of updating changelog files (`latest.md`,
 
 *Use this path if the version number ends in `.0`.*
 
+**Important:** Based on the version, you must choose to follow either section
+A.1 for stable releases or A.2 for preview releases. Do not follow the
+instructions for the other section.
+
 ### A.1: Stable Release (e.g., `v0.28.0`)
 
 For a stable release, you will generate two distinct summaries from the
@@ -73,7 +77,8 @@ detailed **highlights** section for the release-specific page.
         use the existing announcements in `docs/changelogs/index.md` and the
         example within
         `.gemini/skills/docs-changelog/references/index_template.md` as your
-        guide. This format includes PR links and authors.
+        guide. This format includes PR links and authors. Stick to 1 or 2 PR
+        links and authors.
     -   Add this new announcement to the top of `docs/changelogs/index.md`.
 
 2.  **Create Highlights and Update `latest.md`**:
@@ -105,6 +110,10 @@ detailed **highlights** section for the release-specific page.
 
 *Use this path if the version number does **not** end in `.0`.*
 
+**Important:** Based on the version, you must choose to follow either section
+B.1 for stable patches or B.2 for preview patches. Do not follow the
+instructions for the other section.
+
 ### B.1: Stable Patch (e.g., `v0.28.1`)
 
 - **Target File**: `docs/changelogs/latest.md`
@@ -113,10 +122,12 @@ detailed **highlights** section for the release-specific page.
         `# Latest stable release: {{version}}`
     2.  Update the rease date. The line should read,
         `Released: {{release_date_month_dd_yyyy}}`
-    3.  **Prepend** the processed "What's Changed" list from the temporary file
+    3.  Determine if a "What's Changed" section exists in the temporary file
+        If so, continue to step 4. Otherwise, skip to step 5.
+    4.  **Prepend** the processed "What's Changed" list from the temporary file
         to the existing "What's Changed" list in `latest.md`. Do not change or
         replace the existing list, **only add** to the beginning of it.
-    4.  In the "Full Changelog", edit **only** the end of the URL. Identify the
+    5.  In the "Full Changelog", edit **only** the end of the URL. Identify the
         last part of the URL that looks like `...{previous_version}` and update
         it to be `...{version}`.
 
@@ -133,10 +144,12 @@ detailed **highlights** section for the release-specific page.
         `# Preview release: {{version}}`
     2.  Update the rease date. The line should read,
         `Released: {{release_date_month_dd_yyyy}}`
-    3.  **Prepend** the processed "What's Changed" list from the temporary file
+    3.  Determine if a "What's Changed" section exists in the temporary file
+        If so, continue to step 4. Otherwise, skip to step 5.
+    4.  **Prepend** the processed "What's Changed" list from the temporary file
         to the existing "What's Changed" list in `preview.md`. Do not change or
         replace the existing list, **only add** to the beginning of it.
-    4.  In the "Full Changelog", edit **only** the end of the URL. Identify the
+    5.  In the "Full Changelog", edit **only** the end of the URL. Identify the
         last part of the URL that looks like `...{previous_version}` and update
         it to be `...{version}`.
 
@@ -149,5 +162,5 @@ detailed **highlights** section for the release-specific page.
 
 ## Finalize
 
-- After making changes, run `npm run format` to ensure consistency.
+- After making changes, run `npm run format` ONLY to ensure consistency.
 - Delete any temporary files created during the process.

.github/workflows/release-notes.yml

@@ -56,7 +56,18 @@ jobs:
           GH_TOKEN: '${{ secrets.GEMINI_CLI_ROBOT_GITHUB_PAT }}'
           BODY: '${{ github.event.inputs.body || github.event.release.body }}'
 
+      - name: 'Validate version'
+        id: 'validate_version'
+        run: |
+          if echo "${{ steps.release_info.outputs.VERSION }}" | grep -q "nightly"; then
+            echo "Nightly release detected. Stopping workflow."
+            echo "CONTINUE=false" >> "$GITHUB_OUTPUT"
+          else
+            echo "CONTINUE=true" >> "$GITHUB_OUTPUT"
+          fi
+
       - name: 'Generate Changelog with Gemini'
+        if: "steps.validate_version.outputs.CONTINUE == 'true'"
         uses: 'google-github-actions/run-gemini-cli@a3bf79042542528e91937b3a3a6fbc4967ee3c31' # ratchet:google-github-actions/run-gemini-cli@v0
         with:
           gemini_api_key: '${{ secrets.GEMINI_API_KEY }}'
@@ -70,7 +81,10 @@ jobs:
 
             Execute the release notes generation process using the information provided.
 
+            When you are done, please output your thought process and the steps you took for future debugging purposes.
+
       - name: 'Create Pull Request'
+        if: "steps.validate_version.outputs.CONTINUE == 'true'"
         uses: 'peter-evans/create-pull-request@v6'
         with:
           token: '${{ secrets.GEMINI_CLI_ROBOT_GITHUB_PAT }}'