From 7fa0a277c6507d89dc50fc23a314217d22ca4e2f Mon Sep 17 00:00:00 2001
From: Truman Gao <106889354+tdgao@users.noreply.github.com>
Date: Mon, 16 Mar 2026 05:52:16 -0700
Subject: [PATCH] feat: handle geyser extension (#5582)

* feat: add geyser extension detection

* feat: only show geyser if inferred
---
 .../components/LoaderPicker.vue                       |  5 +++--
 .../ui/create-project-version/stages/LoadersStage.vue |  5 ++++-
 apps/frontend/src/helpers/infer/loader-parsers.ts     | 11 +++++++++++
 3 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/apps/frontend/src/components/ui/create-project-version/components/LoaderPicker.vue b/apps/frontend/src/components/ui/create-project-version/components/LoaderPicker.vue
index eedf25212..4c0ed3356 100644
--- a/apps/frontend/src/components/ui/create-project-version/components/LoaderPicker.vue
+++ b/apps/frontend/src/components/ui/create-project-version/components/LoaderPicker.vue
@@ -45,9 +45,10 @@ import { Chips, FormattedTag, TagItem } from '@modrinth/ui'
 
 const selectedLoaders = defineModel<string[]>({ default: [] })
 
-const { loaders } = defineProps<{
+const { loaders, includeGeyser } = defineProps<{
 	loaders: Labrinth.Tags.v2.Loader[]
 	toggleLoader: (loader: string) => void
+	includeGeyser?: boolean
 }>()
 
 const loaderGroup = ref<GroupLabels>('mods')
@@ -92,7 +93,7 @@ function groupLoaders(loaders: Labrinth.Tags.v2.Loader[]) {
 		'bungeecord',
 		'velocity',
 		'waterfall',
-		'geyser',
+		...(includeGeyser ? ['geyser'] : []),
 	]
 
 	const SHADER_SORT = ['optifine', 'iris', 'canvas', 'vanilla']
diff --git a/apps/frontend/src/components/ui/create-project-version/stages/LoadersStage.vue b/apps/frontend/src/components/ui/create-project-version/stages/LoadersStage.vue
index 63aba691d..a0ff8f677 100644
--- a/apps/frontend/src/components/ui/create-project-version/stages/LoadersStage.vue
+++ b/apps/frontend/src/components/ui/create-project-version/stages/LoadersStage.vue
@@ -4,6 +4,7 @@
 			v-model="draftVersion.loaders"
 			:loaders="generatedState.loaders"
 			:toggle-loader="toggleLoader"
+			:include-geyser="includeGeyser"
 		/>
 
 		<div v-if="draftVersion.loaders.length" class="space-y-1">
@@ -52,7 +53,9 @@ const generatedState = useGeneratedState()
 
 const loaders = computed(() => generatedState.value.loaders)
 
-const { draftVersion } = injectManageVersionContext()
+const { draftVersion, inferredVersionData } = injectManageVersionContext()
+
+const includeGeyser = computed(() => inferredVersionData.value?.loaders?.includes('geyser'))
 
 const toggleLoader = (loader: string) => {
 	if (draftVersion.value.loaders.includes(loader)) {
diff --git a/apps/frontend/src/helpers/infer/loader-parsers.ts b/apps/frontend/src/helpers/infer/loader-parsers.ts
index 365664b90..a50928dd6 100644
--- a/apps/frontend/src/helpers/infer/loader-parsers.ts
+++ b/apps/frontend/src/helpers/infer/loader-parsers.ts
@@ -236,6 +236,17 @@ export function createLoaderParsers(
 				loaders: ['sponge'],
 			}
 		},
+		// Geyser Extensions
+		'extension.yml': (file: string): InferredVersionInfo => {
+			const metadata = yaml.load(file) as any
+
+			return {
+				name: metadata.version ? `${project.title} ${metadata.version}` : '',
+				version_number: metadata.version,
+				version_type: versionType(metadata.version),
+				loaders: ['geyser'],
+			}
+		},
 		// Modpacks
 		'modrinth.index.json': (file: string): InferredVersionInfo => {
 			const metadata = JSON.parse(file) as any