diff --git a/app/package.json b/app/package.json
index 7a8b932..e75b00f 100644
--- a/app/package.json
+++ b/app/package.json
@@ -20,7 +20,6 @@
 		"@sveltejs/kit": "^2.57.0",
 		"@sveltejs/vite-plugin-svelte": "^7.0.0",
 		"@testing-library/svelte": "^5.3.1",
-		"@types/dompurify": "^3.0.5",
 		"jsdom": "^29.0.2",
 		"svelte": "^5.55.2",
 		"svelte-check": "^4.4.6",
@@ -33,7 +32,6 @@
 		"applesauce-loaders": "^5.1.0",
 		"applesauce-relay": "^5.2.0",
 		"applesauce-signers": "^5.2.0",
-		"dompurify": "^3.4.0",
 		"highlight.js": "^11.11.1",
 		"isomorphic-dompurify": "^3.10.0",
 		"marked": "^18.0.0",
diff --git a/app/src/lib/render/markdown.ts b/app/src/lib/render/markdown.ts
index 383fdfe..6a29211 100644
--- a/app/src/lib/render/markdown.ts
+++ b/app/src/lib/render/markdown.ts
@@ -14,6 +14,11 @@ hljs.registerLanguage('bash', bash);
 hljs.registerLanguage('sh', bash);
 hljs.registerLanguage('json', json);
 
+/**
+ * Lokaler Marked-Instance, damit die globale `marked`-Singleton nicht
+ * mutiert wird — andere Module können `marked` unbeeinflusst weiterverwenden.
+ * (Spec §3: lokale Ersetzbarkeit der Engine.)
+ */
 const markedInstance = new Marked({
 	breaks: true,
 	gfm: true,