add comments

packages/app/package.json

@@ -55,7 +55,8 @@
     "escape-string-regexp": "5.0.0 or above exports only ESM",
     "next": "/Sandbox rendering is crashed with v12.3 or above ",
     "string-width": "5.0.0 or above exports only ESM.",
-    "prom-client": "!!DO NOT REMOVE!! A peer dependency of @promster."
+    "prom-client": "!!DO NOT REMOVE!! A peer dependency of @promster.",
+    "remark-wiki-link": "!!DO NOT REMOVE!! including 'mdast-util-wiki-link' and 'micromark-extension-wiki-link' required by pukiwiki-like-linker"
   },
   "dependencies": {
     "@akebifiky/remark-simple-plantuml": "^1.0.2",

packages/app/src/services/renderer/remark-plugins/pukiwiki-like-linker.ts

@@ -1,3 +1,4 @@
+// 'mdast-util-wiki-link' and 'micromark-extension-wiki-link' are included in 'remark-wiki-link' package
 import { fromMarkdown, toMarkdown } from 'mdast-util-wiki-link';
 import { syntax } from 'micromark-extension-wiki-link';
 import { Plugin } from 'unified';