From 91842d2e30b9be667cdc24c50fe85f8107ee9b78 Mon Sep 17 00:00:00 2001
From: Wickedness <y2keui@nate.com>
Date: Sun, 5 Jul 2026 15:14:24 +0900
Subject: [PATCH] Validate unit sprite PNG color mode

---
 scripts/verify-unit-sprite-asset-data.mjs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/scripts/verify-unit-sprite-asset-data.mjs b/scripts/verify-unit-sprite-asset-data.mjs
index bbf09d2..47ec609 100644
--- a/scripts/verify-unit-sprite-asset-data.mjs
+++ b/scripts/verify-unit-sprite-asset-data.mjs
@@ -208,6 +208,9 @@ function validatePngDimensions(errors, key, path, expected) {
   if (dimensions.width !== expected.width || dimensions.height !== expected.height) {
     errors.push(`${key}: expected ${expected.width}x${expected.height}, got ${dimensions.width}x${dimensions.height}`);
   }
+  if (dimensions.bitDepth !== 8 || dimensions.colorType !== 6) {
+    errors.push(`${key}: expected 8-bit RGBA PNG color type 6, got bitDepth=${dimensions.bitDepth} colorType=${dimensions.colorType}`);
+  }
 }
 
 function readPngDimensions(path) {
@@ -224,6 +227,8 @@ function readPngDimensions(path) {
 
   return {
     width: bytes.readUInt32BE(16),
-    height: bytes.readUInt32BE(20)
+    height: bytes.readUInt32BE(20),
+    bitDepth: bytes[24],
+    colorType: bytes[25]
   };
 }