diff --git a/packages/stage-ui-tachie/package.json b/packages/stage-ui-tachie/package.json
index cd1156110..739f5fe3e 100644
--- a/packages/stage-ui-tachie/package.json
+++ b/packages/stage-ui-tachie/package.json
@@ -23,8 +23,8 @@
     "./constants/emotions": "./src/constants/emotions.ts",
     "./stores": "./src/stores/index.ts",
     "./stores/tachie": "./src/stores/tachie.ts",
-    "./utils/tachie-archive": "./src/utils/tachieArchive.ts",
-    "./utils/tachie-preview": "./src/utils/tachiePreview.ts"
+    "./utils/tachie-archive": "./src/utils/tachie-archive.ts",
+    "./utils/tachie-preview": "./src/utils/tachie-preview.ts"
   },
   "scripts": {
     "typecheck": "vue-tsc --noEmit"
diff --git a/packages/stage-ui-tachie/src/components/scenes/tachie/model.vue b/packages/stage-ui-tachie/src/components/scenes/tachie/model.vue
index 448815a53..3392802d4 100644
--- a/packages/stage-ui-tachie/src/components/scenes/tachie/model.vue
+++ b/packages/stage-ui-tachie/src/components/scenes/tachie/model.vue
@@ -3,7 +3,7 @@ import type { Application } from '@pixi/app'
 import type { Texture } from '@pixi/core'
 
 import type { TachieEmotion } from '../../../constants/emotions'
-import type { TachieLoadedAssets } from '../../../utils/tachieArchive'
+import type { TachieLoadedAssets } from '../../../utils/tachie-archive'
 
 import { errorMessageFrom } from '@moeru/std'
 import { Texture as PixiTexture, Renderer } from '@pixi/core'
@@ -19,7 +19,7 @@ import { useTachie } from '../../../stores/tachie'
 import {
   loadTachieZip,
   MAX_TACHIE_ARCHIVE_BYTES,
-} from '../../../utils/tachieArchive'
+} from '../../../utils/tachie-archive'
 
 interface MountedTachie {
   assets: TachieLoadedAssets
diff --git a/packages/stage-ui-tachie/src/index.ts b/packages/stage-ui-tachie/src/index.ts
index 99d49259c..7283d3b8c 100644
--- a/packages/stage-ui-tachie/src/index.ts
+++ b/packages/stage-ui-tachie/src/index.ts
@@ -2,5 +2,5 @@ export { TachieCanvas, TachieModel } from './components/scenes/tachie'
 export { default as TachieScene } from './components/scenes/tachie.vue'
 export * from './constants/emotions'
 export * from './stores'
-export * from './utils/tachieArchive'
-export * from './utils/tachiePreview'
+export * from './utils/tachie-archive'
+export * from './utils/tachie-preview'
diff --git a/packages/stage-ui-tachie/src/utils/tachieArchive.test.ts b/packages/stage-ui-tachie/src/utils/tachie-archive.test.ts
similarity index 97%
rename from packages/stage-ui-tachie/src/utils/tachieArchive.test.ts
rename to packages/stage-ui-tachie/src/utils/tachie-archive.test.ts
index 557cdf5e1..f80c270a4 100644
--- a/packages/stage-ui-tachie/src/utils/tachieArchive.test.ts
+++ b/packages/stage-ui-tachie/src/utils/tachie-archive.test.ts
@@ -1,6 +1,6 @@
 import { describe, expect, it } from 'vitest'
 
-import { resolveTachieArchiveLayout } from './tachieArchive'
+import { resolveTachieArchiveLayout } from './tachie-archive'
 
 describe('resolveTachieArchiveLayout', () => {
   it('maps root images case-insensitively while ignoring metadata', () => {
diff --git a/packages/stage-ui-tachie/src/utils/tachieArchive.ts b/packages/stage-ui-tachie/src/utils/tachie-archive.ts
similarity index 100%
rename from packages/stage-ui-tachie/src/utils/tachieArchive.ts
rename to packages/stage-ui-tachie/src/utils/tachie-archive.ts
diff --git a/packages/stage-ui-tachie/src/utils/tachiePreview.ts b/packages/stage-ui-tachie/src/utils/tachie-preview.ts
similarity index 95%
rename from packages/stage-ui-tachie/src/utils/tachiePreview.ts
rename to packages/stage-ui-tachie/src/utils/tachie-preview.ts
index 25975f9ba..93b2474da 100644
--- a/packages/stage-ui-tachie/src/utils/tachiePreview.ts
+++ b/packages/stage-ui-tachie/src/utils/tachie-preview.ts
@@ -1,5 +1,5 @@
 import { DEFAULT_TACHIE_EMOTION } from '../constants/emotions'
-import { loadTachieZip } from './tachieArchive'
+import { loadTachieZip } from './tachie-archive'
 
 /**
  * Creates a compact, aspect-preserving preview from the required neutral image.