diff --git a/content/ns.md b/content/ns.md
new file mode 100644
index 00000000..e0dff9c9
--- /dev/null
+++ b/content/ns.md
@@ -0,0 +1,96 @@
+# Misskey Extensions to ActivityPub
+
+This page documents the extensions to ActivityPub that Misskey uses. This page lists some context items defined in JSON-LD contexts and explains their semantics.
+
+This document uses [compact IRIs](https://www.w3.org/TR/json-ld/#dfn-compact-iri).
+The prefix `ap` is used to refer to `https://www.w3.org/ns/activitystreams#`.
+The prefix `misskey` is used to refer to `https://misskey-hub-net/ns#`.
+
+## `_misskey_content`
+
+- compact IRI: `misskey:_misskey_content`
+- canonical IRI: `https://misskey-hub.net/ns#_misskey_content`
+
+:::warning
+This value is deprecated and might be removed in the future.
+See also <https://github.com/misskey-dev/misskey/pull/8787>.
+:::
+
+This value is identical to having a `source` property like this:
+
+```js
+source: {
+	content: _misskey_content,
+	mediaType: "text/x.misskeymarkdown"
+}
+```
+
+Where `_misskey_content` represents the value of the field described in this section.
+
+## `_misskey_summary`
+
+- compact IRI: `misskey:_misskey_summary`
+- canonical IRI: `https://misskey-hub.net/ns#_misskey_summary`
+
+Used on actors to display their summary as MFM. The content is same as `summary`, but in MFM form.
+
+## `_misskey_quote`
+
+- compact IRI: `misskey:_misskey_quote`
+- canonical IRI: `https://misskey-hub.net/ns#_misskey_quote`
+
+:::tip
+Ways to potentially provide this information using the core ActivityPub vocabulary are currently underway, see <https://github.com/misskey-dev/misskey/issues/8722>.
+:::
+
+Indicates that this note is quoting another note. It contains the `id` of the note being quoted.
+
+This seems to be identical to `https://fedibird.com/ns#quoteUri`.
+Misskey also uses `as:quoteUrl` for this but this was not adopted to the ActivityPub specification.
+This is for compatibility with some other ActivityPub programs that operate using this.
+
+## `_misskey_reaction`
+
+- compact IRI: `misskey:_misskey_reaction`
+- canonical IRI: `https://misskey-hub.net/ns#_misskey_reaction`
+
+Misskey federates its reactions as `Like` activities.
+What kind of reaction was used is conveyed using this field.
+Misskey also sets `ap:content` of the `Like` activity to the same value.
+
+The content will be a string that either contains a single Unicode Emoji or a string that starts and ends with a colon. In the latter case the reaction uses a custom emoji, and the `tag` property will be set to contain the data of the respective emoji.
+
+## `_misskey_votes`
+
+- compact IRI: `misskey:_misskey_votes`
+- canonical IRI: `https://misskey-hub.net/ns#_misskey_votes`
+
+This value is used for `Question` activities to indicate the number of votes an option currently has.
+This value is identical to having a `replies` property like this:
+
+```js
+replies: {
+	type: 'Collection',
+	totalItems: _misskey_votes
+}
+```
+
+Where `_misskey_votes` represents the value of the field described in this section.
+
+## `_misskey_talk`
+
+- compact IRI: `misskey:_misskey_talk`
+- canonical IRI: `https://misskey-hub.net/ns#_misskey_talk`
+
+This value is used for `Note` type objects to indicate that they are a Misskey chat message.
+Misskey handles these kinds of messages specially, e.g. it will apply different audience scoping rules and show them via a different API than usual `Note` objects.
+
+This field can only take the value of `true` (or be absent).
+
+## `isCat`
+
+- compact IRI: `misskey:isCat`
+- canonical IRI: `https://misskey-hub.net/ns#isCat`
+
+Used on actors to indicate that they in some way identify as a cat, expressed as a boolean value.
+If this property is set to `true`, displaying the actor or their notes will have some special effects attached in some clients.
diff --git a/pages/ns.vue b/pages/ns.vue
new file mode 100644
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--- /dev/null
+++ b/pages/ns.vue
@@ -0,0 +1,58 @@
+<template>
+    <div class="relative container mx-auto max-w-screen-xl p-6 lg:py-0 grid docs-main">
+        <div class="lg:hidden sticky top-16 -mx-6 -mt-6 overflow-y-auto bg-slate-50 dark:bg-slate-900 z-[9890] border-b dark:border-slate-700 text-sm flex items-start">
+            <details v-if="data?.body && data.body.toc.links.length > 0" class="peer flex-grow flex-shrink-0" :open="openState">
+                <summary class="py-4 cursor-pointer">
+                    {{ $t('_docs._toc.title') }}
+                </summary>
+                <div class="pb-4 px-6 max-h-[65vh] overflow-y-auto">
+                    <DocsTocLinks :links="data?.body.toc.links" @child-click="openState = false" />
+                </div>
+            </details>
+        </div>
+        <div class="pt-6 lg:p-6 w-full overflow-x-hidden">
+            <template v-if="data?.body">
+                <ContentRenderer v-if="data.body.children.length > 0" :value="data" class="markdown-body w-full mb-6">
+                </ContentRenderer>
+            </template>
+        </div>
+        <div class="hidden lg:block text-sm">
+            <div class="sticky top-16 h-[calc(100vh-4rem)] overflow-y-auto py-6 pl-6">
+                <h3 class="font-bold mb-6">{{ $t('_docs._toc.title') }}</h3>
+                <DocsTocLinks v-if="data?.body" :links="data?.body.toc.links" class="break-words" />
+            </div>
+        </div>
+    </div>
+</template>
+
+<script setup lang="ts">
+const openState = ref<boolean>(false);
+
+definePageMeta({
+    layout: 'slim',
+});
+
+defineI18nRoute(false);
+
+const route = useRoute();
+
+const { data } = await useAsyncData('global-ns', () => queryContent(`/ns`).findOne());
+
+if (!data.value) {
+    throw createError({ statusCode: 404, statusMessage: 'page not found' });
+}
+
+route.meta.title = data.value?.title;
+</script>
+
+<style scoped>
+.docs-main {
+    grid-template-columns: 1fr;
+}
+
+@screen lg {
+    .docs-main {
+        grid-template-columns: 1fr 14rem;
+    }
+}
+</style>
\ No newline at end of file
diff --git a/server/plugins/i18nRedirector.ts b/server/plugins/i18nRedirector.ts
index 4957df78..f70f3015 100644
--- a/server/plugins/i18nRedirector.ts
+++ b/server/plugins/i18nRedirector.ts
@@ -2,7 +2,7 @@ import { useRuntimeConfig } from '#imports';
 
 export default defineNitroPlugin((nitroApp) => {
   nitroApp.hooks.hook('render:html', (html, { event }) => {
-    if (event.path.includes("_nuxt") || event.path.match(/\d{3}\.html/)) {
+    if (event.path.includes("_nuxt") || event.path.match(/\d{3}\.html/) || event.path.match(/^\/ns/)) {
       return;
     }