update contribution guide

.github/workflows/pr-check.yml

@@ -0,0 +1,39 @@
+name: PR Description Check
+
+on:
+  pull_request:
+    types: [opened, edited, synchronize]
+
+jobs:
+  check-links:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check PR description for required links
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const body = context.payload.pull_request.body || '';
+
+            const hasClawhubLink = /https:\/\/clawhub\.ai\/[\w-]+\/[\w-]+/.test(body);
+            const hasGithubLink = /https:\/\/github\.com\/openclaw\/skills\/tree\/main\/skills\/[\w-]+\/[\w-]+/.test(body);
+
+            const errors = [];
+            if (!hasClawhubLink) {
+              errors.push('Missing ClawHub link (e.g. https://clawhub.ai/steipete/slack)');
+            }
+            if (!hasGithubLink) {
+              errors.push('Missing GitHub link (e.g. https://github.com/openclaw/skills/tree/main/skills/steipete/slack)');
+            }
+
+            if (errors.length > 0) {
+              const message = `## ❌ PR Description Check Failed\n\nYour PR description must include both links:\n\n${errors.map(e => '- ' + e).join('\n')}\n\nSee [CONTRIBUTING.md](../blob/main/CONTRIBUTING.md#pr-description) for details.`;
+
+              await github.rest.issues.createComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: context.issue.number,
+                body: message
+              });
+
+              core.setFailed('PR description is missing required links.');
+            }