diff --git a/scripts/publish_test_metrics.py b/scripts/publish_test_metrics.py
index 2528339..4aeee92 100755
--- a/scripts/publish_test_metrics.py
+++ b/scripts/publish_test_metrics.py
@@ -187,8 +187,7 @@ def _post_text(url: str, payload: str) -> None:
             raise RuntimeError(f"push failed status={resp.status}")
 
 
-def _count_source_files_over_limit(repo_root: Path, max_lines: int = 500) -> int:
-    count = 0
+def _iter_source_files(repo_root: Path):
     for rel_root in SOURCE_SCAN_ROOTS:
         base = repo_root / rel_root
         if not base.exists():
@@ -200,9 +199,19 @@ def _count_source_files_over_limit(repo_root: Path, max_lines: int = 500) -> int
                 continue
             if path.name.endswith("_test.go") or path.name.endswith(".test.ts") or path.name.endswith(".test.tsx"):
                 continue
-            lines = len(path.read_text(encoding="utf-8", errors="ignore").splitlines())
-            if lines > max_lines:
-                count += 1
+            yield path
+
+
+def _count_source_files(repo_root: Path) -> int:
+    return sum(1 for _ in _iter_source_files(repo_root))
+
+
+def _count_source_files_over_limit(repo_root: Path, max_lines: int = 500) -> int:
+    count = 0
+    for path in _iter_source_files(repo_root):
+        lines = len(path.read_text(encoding="utf-8", errors="ignore").splitlines())
+        if lines > max_lines:
+            count += 1
     return count
 
 
@@ -306,6 +315,7 @@ def main() -> int:
     }
     gate_ok = bool(gate_summary.get("ok"))
     gate_issues = gate_summary.get("issues") or []
+    source_files_total = _count_source_files(repo_root)
     source_lines_over_500 = _count_source_files_over_limit(repo_root, max_lines=500)
     issue_checks = {
         str(issue.get("check") or "").strip().lower()
@@ -363,6 +373,8 @@ def main() -> int:
         f'pegasus_quality_gate_coverage_percent{{suite="{suite}"}} {coverage_pct:.3f}',
         "# TYPE platform_quality_gate_workspace_line_coverage_percent gauge",
         f'platform_quality_gate_workspace_line_coverage_percent{{suite="{suite}"}} {coverage_pct:.3f}',
+        "# TYPE platform_quality_gate_source_files_total gauge",
+        f'platform_quality_gate_source_files_total{{suite="{suite}"}} {source_files_total}',
         "# TYPE platform_quality_gate_source_lines_over_500_total gauge",
         f'platform_quality_gate_source_lines_over_500_total{{suite="{suite}"}} {source_lines_over_500}',
         "# TYPE pegasus_quality_gate_status gauge",