fix(upgrade): fix repo URLs, make upgrade failures fatal, scope git add to fern/, fix heredoc escaping

Co-Authored-By: barry.zou <barry.zou@buildwithfern.com>

Author: devin-ai-integration[bot]

actions/upgrade/README.md

@@ -34,7 +34,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: fern-api/fern-github-actions/actions/upgrade@v1
+      - uses: fern-api/actions/upgrade@v1
         with:
           fern-token: ${{ secrets.FERN_TOKEN }}
 ```

actions/upgrade/action.yml

@@ -65,17 +65,15 @@ runs:
         FERN_TOKEN: ${{ inputs.fern-token }}
       run: |
         echo "Running fern upgrade..."
-        ${{ steps.cli.outputs.fern-cmd }} upgrade --yes || \
-          echo "::warning::fern upgrade exited with non-zero code"
+        ${{ steps.cli.outputs.fern-cmd }} upgrade --yes
 
     - name: Run fern generator upgrade
       shell: bash
       env:
         FERN_TOKEN: ${{ inputs.fern-token }}
       run: |
         echo "Running fern generator upgrade..."
-        ${{ steps.cli.outputs.fern-cmd }} generator upgrade --yes || \
-          echo "::warning::fern generator upgrade exited with non-zero code"
+        ${{ steps.cli.outputs.fern-cmd }} generator upgrade --yes
         # TODO: FER-9669 — Check automation config before running upgrades
 
     - name: Compute upgrade diff
@@ -93,6 +91,7 @@ runs:
         GH_TOKEN: ${{ inputs.github-token }}
         GITHUB_TOKEN: ${{ inputs.github-token }}
         PR_TITLE: ${{ steps.diff.outputs.pr-title }}
+        PR_BODY: ${{ steps.diff.outputs.pr-body }}
         COMMIT_MSG: ${{ steps.diff.outputs.commit-msg }}
       run: |
         BRANCH="fern/upgrade"
@@ -114,8 +113,8 @@ runs:
         git fetch origin "$DEFAULT_BRANCH"
         git checkout -B "$BRANCH" "origin/$DEFAULT_BRANCH"
 
-        # Stage all changes
-        git add -A
+        # Stage only fern config changes (fern.config.json + generators.yml)
+        git add fern/
         if git diff --cached --quiet; then
           echo "No changes to commit"
           echo "pr-url=" >> "$GITHUB_OUTPUT"
@@ -126,10 +125,8 @@ runs:
         git commit -m "$COMMIT_MSG"
         git push --force origin "$BRANCH"
 
-        # Write PR body to temp file to avoid shell escaping issues
-        cat > /tmp/pr-body.md << 'PREOF'
-        ${{ steps.diff.outputs.pr-body }}
-        PREOF
+        # Write PR body to temp file via env var to avoid shell escaping issues
+        printf '%s' "$PR_BODY" > /tmp/pr-body.md
 
         # Create or update PR
         EXISTING_PR=$(gh pr list --head "$BRANCH" --state open --json number --jq '.[0].number // empty')

actions/upgrade/scripts/diff.js

@@ -170,7 +170,7 @@ function buildPrBody(diff) {
 
   sections.push("---");
   sections.push(
-    "\uD83E\uDD16 This PR was automatically created by [fern-upgrade](https://github.com/fern-api/fern-github-actions/tree/main/actions/upgrade)"
+    "\uD83E\uDD16 This PR was automatically created by [fern-upgrade](https://github.com/fern-api/actions/tree/main/actions/upgrade)"
   );
 
   return sections.join("\n");