From 76a13c44412f0cde97deec043c777931f5dbf909 Mon Sep 17 00:00:00 2001
From: svemagie <869694+svemagie@users.noreply.github.com>
Date: Mon, 23 Mar 2026 18:53:41 +0100
Subject: [PATCH] fix: normalize related to array in seeAlsoLinks filter

Indiekit stores a single related URL as a plain string, not a YAML list.
Iterating over a string yields characters, breaking the See Also section.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 eleventy.config.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/eleventy.config.js b/eleventy.config.js
index f18a894..ca501e6 100644
--- a/eleventy.config.js
+++ b/eleventy.config.js
@@ -1128,7 +1128,8 @@ export default function (eleventyConfig) {
       const key = String(url).replace(/\/$/, "");
       if (!seen.has(key)) { seen.add(key); result.push(String(url)); }
     };
-    for (const url of (relatedUrls || [])) add(url);
+    const relArray = !relatedUrls ? [] : Array.isArray(relatedUrls) ? relatedUrls : [relatedUrls];
+    for (const url of relArray) add(url);
     try {
       const content = readFileSync(inputPath, "utf-8");
       const escaped = siteUrl.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");