chore: sync pr-check.yml from Template-Generic [skip ci]

.mokogitea/workflows/pr-check.yml

@@ -5,8 +5,8 @@
 # FILE INFORMATION
 # DEFGROUP: Gitea.Workflow
 # INGROUP: mokocli.CI
-# REPO: https://git.mokoconsulting.tech/mokoconsulting-tech/mokocli
-# PATH: /templates/workflows/universal/pr-check.yml.template
+# REPO: https://git.mokoconsulting.tech/MokoConsulting/Template-Generic
+# PATH: /.mokogitea/workflows/pr-check.yml
 # VERSION: 09.23.00
 # BRIEF: PR gate — branch policy + code validation before merge
 
@@ -97,6 +97,46 @@ jobs:
           echo "Branch policy: OK (${HEAD} → ${BASE})"
           echo "## Branch Policy: Passed" >> $GITHUB_STEP_SUMMARY
 
+  # ── Docs Update Gate (main PRs) ─────────────────────────────────────────
+  require-docs:
+    name: Require Docs Update
+    runs-on: ubuntu-latest
+    # Enforce only on PRs merging into main: README.md + CHANGELOG.md must both be updated.
+    if: ${{ github.base_ref == 'main' }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Require README.md and CHANGELOG.md in the PR diff
+        run: |
+          BASE="${{ github.event.pull_request.base.sha }}"
+          HEAD="${{ github.event.pull_request.head.sha }}"
+          CHANGED="$(git diff --name-only "$BASE" "$HEAD" 2>/dev/null || true)"
+          if [ -z "$CHANGED" ]; then
+            git fetch -q origin "${{ github.base_ref }}" 2>/dev/null || true
+            CHANGED="$(git diff --name-only "origin/${{ github.base_ref }}...HEAD" 2>/dev/null || true)"
+          fi
+          echo "Changed files in PR:"
+          echo "$CHANGED"
+          MISSING=""
+          echo "$CHANGED" | grep -qxE 'README\.md' || MISSING="README.md"
+          echo "$CHANGED" | grep -qxE 'CHANGELOG\.md' || MISSING="${MISSING:+$MISSING, }CHANGELOG.md"
+          if [ -n "$MISSING" ]; then
+            echo "::error::PRs into main must update: ${MISSING}"
+            {
+              echo "## Docs Update Required"
+              echo ""
+              echo "PRs merging into \`main\` must update both **README.md** and **CHANGELOG.md**."
+              echo ""
+              echo "Not updated in this PR: **${MISSING}**"
+            } >> "$GITHUB_STEP_SUMMARY"
+            exit 1
+          fi
+          echo "Docs update present (README.md + CHANGELOG.md)"
+          echo "## Docs Update: Passed" >> "$GITHUB_STEP_SUMMARY"
+
   # ── Secret Scanning ──────────────────────────────────────────────────
   gitleaks:
     name: Secret Scan