From fc31f33fad245a993076df9aa53b52d811e7670a Mon Sep 17 00:00:00 2001
From: andreolf <francesco.andreoli@hotmail.com>
Date: Mon, 24 Aug 2026 17:24:49 +0200
Subject: [PATCH] Support <details> collapsing in markdown

The markdown sanitizer's allowlist did not include the <details> and
<summary> tags, so GitHub-style collapsible sections were stripped and
their contents rendered flat. Add both tags to ALLOWED_TAGS and the
"open" attribute to ALLOWED_ATTR, so collapsible sections render and
<details open> starts expanded.

Closes 390f3f295881bfc418eafd3532ea326fe365c7a2
---
 src/lib/markdown.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/lib/markdown.ts b/src/lib/markdown.ts
index 430af0b56..32d1d8d8d 100644
--- a/src/lib/markdown.ts
+++ b/src/lib/markdown.ts
@@ -30,6 +30,7 @@ export const sanitizeConfig: Config = {
     "href",
     "id",
     "name",
+    "open",
     "rel",
     "src",
     "target",
@@ -46,6 +47,7 @@ export const sanitizeConfig: Config = {
     "code",
     "dd",
     "del",
+    "details",
     "div",
     "dl",
     "dt",
@@ -67,6 +69,7 @@ export const sanitizeConfig: Config = {
     "radicle-external-link",
     "s",
     "strong",
+    "summary",
     "table",
     "tbody",
     "td",