From 07f0e79e20aaf6250cf111a410aed149d92d6609 Mon Sep 17 00:00:00 2001
From: thuanbui <thuanbui87@gmail.com>
Date: Thu, 12 Mar 2026 14:04:33 +0900
Subject: [PATCH] fix: prevent overwriting existing frontmatter fields with
 custom taxonomy slugs

---
 src/parser.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/parser.js b/src/parser.js
index a166e70..9a2b5bb 100644
--- a/src/parser.js
+++ b/src/parser.js
@@ -226,6 +226,10 @@ function populateFrontmatter(posts) {
 		// inject custom taxonomy slugs into frontmatter, each taxonomy as its own field
 		Object.entries(post.customTaxonomies).forEach(([domain, slugs]) => {
 			if (slugs.length > 0) {
+				if (post.frontmatter.hasOwnProperty(domain)) {
+					console.warn(`⚠️  Skipping custom taxonomy '${domain}' on post '${post.slug}' because it conflicts with an existing frontmatter field.`);
+					return;
+				}
 				post.frontmatter[domain] = slugs;
 			}
 		});