feat(agents): resolve unique advertised model variations (#3472)

.github/scripts/pr-walkthrough-workflow-contract_test.py

@@ -129,7 +129,7 @@ class PRWalkthroughWorkflowContractTest(unittest.TestCase):
             'PUBLIC_URL="${WALKTHROUGH_BASE_URL%/}/pr/${PR_NUMBER}/${SHORT_HEAD_SHA}.html"',
             "RESPONSE_META_PATH=pr-walkthrough-public.response",
             "curl --fail",
-            "--write-out '%{http_code}\\t%{content_type}\\t%{url_effective}'",
+            "--write-out '%{http_code}\\t%{content_type}\\t%{url_effective}\\n'",
             "response_status",
             'response_effective_url" != "$PUBLIC_URL"',
             "response_content_type",

.github/workflows/pr-walkthrough-reconcile.yml

@@ -69,7 +69,7 @@ jobs:
           if ! curl --fail --silent --show-error --location --max-time 30 \
             --retry 3 --retry-all-errors --retry-delay 2 --retry-max-time 30 \
             --output "$PUBLIC_HTML_PATH" \
-            --write-out '%{http_code}\t%{content_type}\t%{url_effective}' \
+            --write-out '%{http_code}\t%{content_type}\t%{url_effective}\n' \
             > "$RESPONSE_META_PATH" \
             "$PUBLIC_URL"; then
             echo "Canonical walkthrough is not publicly available; skipping repair." >> "$GITHUB_STEP_SUMMARY"