better recon info in certain (nested) situations

src/checks/defensive-guards.ts

@@ -41,14 +41,13 @@
  * @module pygienium/checks/defensive-guards
  */
 
-import { readdirSync } from "node:fs";
 import { join } from "node:path";
 import {
 	registerCheck,
 	type CheckDefinition,
 	type CheckScope,
 } from "./registry.js";
-import { isScopeSource, scopeRulesMarkdown } from "./scope.js";
+import { hasScopeSources, scopeRulesMarkdown } from "./scope.js";
 
 /** Output directory for this check's persistent reports. */
 export function defensiveGuardsOutputDir(cwd: string): string {
@@ -70,23 +69,13 @@ export function changesPath(cwd: string): string {
  * with zero source files gives the scanner nothing to analyse.
  */
 function defensiveGuardsGate(cwd: string): string | undefined {
-	let found = false;
 	try {
-		const entries = readdirSync(cwd);
-		for (const entry of entries) {
-			if (isScopeSource(entry)) {
-				found = true;
-				break;
-			}
-		}
+		if (hasScopeSources(cwd)) return undefined;
 	} catch {
 		// unreadable cwd → let the agent decide; don't block.
 		return undefined;
 	}
-	if (!found) {
-		return "no source files found to inspect";
-	}
-	return undefined;
+	return "no source files found to inspect";
 }
 
 /**