diff --git a/server/utils/promptComfy.ts b/server/utils/promptComfy.ts
index 87c835f..ba8a4da 100644
--- a/server/utils/promptComfy.ts
+++ b/server/utils/promptComfy.ts
@@ -1,8 +1,8 @@
+import { comfyInputFilename } from '~/server/utils/comfy'
 import { getSidecarImageHost } from '~/server/utils/imageComfy'
 import { ensureSidecarReady } from '~/server/utils/imageComfyLifecycle'
 import { buildVisionPromptWorkflow } from '~/server/utils/promptWorkflow'
 import { normalizeShotScript } from '~/utils/parseRecommend'
-import { comfyJobPrefix } from '~/utils/outputNames'
 
 export type PromptJobStatus = 'queued' | 'running' | 'complete' | 'error'
 
@@ -42,18 +42,10 @@ async function promptComfyFetch(path: string, init?: RequestInit) {
   }
 }
 
-function promptInputFilename(original: string, jobId?: string) {
-  const raw = String(original || 'still.png')
-  const dot = raw.lastIndexOf('.')
-  const ext = (dot >= 0 ? raw.slice(dot) : '.png').replace(/[^.a-zA-Z0-9]/g, '') || '.png'
-  const base = (dot >= 0 ? raw.slice(0, dot) : raw).replace(/[^a-zA-Z0-9._-]+/g, '_').slice(0, 48) || 'still'
-  return `${comfyJobPrefix(jobId)}_${base}${ext}`
-}
-
 async function uploadPromptImage(file: { filename: string; data: Buffer; type?: string }, jobId?: string) {
   const body = new FormData()
   const blob = new Blob([new Uint8Array(file.data)], { type: file.type || 'application/octet-stream' })
-  const filename = promptInputFilename(file.filename, jobId)
+  const filename = comfyInputFilename(file.filename, file.data, jobId)
   body.append('image', blob, filename)
   body.append('overwrite', 'true')
   body.append('type', 'input')