diff --git a/scripts/publish_test_metrics.py b/scripts/publish_test_metrics.py
index 79fc260..41bfea8 100755
--- a/scripts/publish_test_metrics.py
+++ b/scripts/publish_test_metrics.py
@@ -134,6 +134,12 @@ def _count_source_lines_over_500(root: Path) -> int:
     return over
 
 
+def _count_source_files(root: Path) -> int:
+    if not root.exists():
+        return 0
+    return sum(1 for path in root.rglob("*.py") if path.is_file())
+
+
 def _load_json(path: Path) -> dict | None:
     if not path.exists():
         return None
@@ -259,6 +265,7 @@ def main() -> int:
     coverage_pct = _load_coverage_percent(coverage_path)
     gate_rc = _load_gate_rc(gate_rc_path)
     docs_rc = _load_gate_rc(docs_rc_path)
+    source_files_total = _count_source_files(source_root)
     source_lines_over_500 = _count_source_lines_over_500(source_root)
     passed = max(totals["tests"] - totals["failures"] - totals["errors"] - totals["skipped"], 0)
     outcome = "ok" if totals["tests"] > 0 and totals["failures"] == 0 and totals["errors"] == 0 else "failed"
@@ -296,6 +303,8 @@ def main() -> int:
             f'atlasbot_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 platform_quality_gate_build_info gauge",