From a3aeeac2c3bf12ad2a5f0dae0f2fd2ae4442cfde Mon Sep 17 00:00:00 2001
From: Truman Gao <106889354+tdgao@users.noreply.github.com>
Date: Tue, 16 Jun 2026 12:47:16 -0600
Subject: [PATCH] fix: babric mods incorrectly detected as fabric (#6407)

* fix: babric mods incorrectly detected as fabric

* remove: standard version, just check for fabric normalized beta version number

* add comment
---
 .../src/helpers/infer/loader-parsers.ts       | 24 +++++++++++++++----
 1 file changed, 20 insertions(+), 4 deletions(-)

diff --git a/apps/frontend/src/helpers/infer/loader-parsers.ts b/apps/frontend/src/helpers/infer/loader-parsers.ts
index ee453ea1b..476297349 100644
--- a/apps/frontend/src/helpers/infer/loader-parsers.ts
+++ b/apps/frontend/src/helpers/infer/loader-parsers.ts
@@ -132,23 +132,39 @@ export function createLoaderParsers(
 				),
 			}
 		},
-		// Fabric
+		// Fabric (or Babric for mc version beta 1.7.3)
 		'fabric.mod.json': (file: string): InferredVersionInfo => {
 			const metadata = JSON.parse(file) as any
 
-			const detectedGameVersions = metadata.depends
+			const mcDependency = metadata.depends?.minecraft
+			const mcDependencies = Array.isArray(mcDependency) ? mcDependency : [mcDependency]
+
+			let detectedGameVersions = metadata.depends
 				? getGameVersionsMatchingSemverRange(metadata.depends.minecraft, simplifiedGameVersions)
 				: []
 			const loaders: string[] = []
 
+			// Detect Beta 1.7.3 -> Babric
+			const hasBabricVersion = mcDependencies.some(
+				(version: string | undefined) => version?.includes('1.0.0-beta.7.3'), // this is fabric's normalized mc version format
+			)
+
 			// Detect 1.3-1.13 -> legacy-fabric
 			const hasLegacyVersions = detectedGameVersions.some((version) => {
 				const match = version.match(/^1\.(\d+)/)
 				return match && parseInt(match[1]) >= 3 && parseInt(match[1]) <= 13
 			})
 
-			if (hasLegacyVersions) loaders.push('legacy-fabric')
-			else loaders.push('fabric')
+			if (hasBabricVersion) {
+				loaders.push('babric')
+				detectedGameVersions = gameVersions
+					.filter((version) => version.version === 'b1.7.3')
+					.map((version) => version.version)
+			} else if (hasLegacyVersions) {
+				loaders.push('legacy-fabric')
+			} else {
+				loaders.push('fabric')
+			}
 
 			return {
 				name: `${project.title} ${metadata.version}`,