**Comprehensive, LLM-Testable Specification for the “AI Bulk Image Renamer” SaaS**

### 0. Terminology
01. *Batch* = one drag-and-drop upload event containing ≤ N images, where N depends on the user’s plan.  
02. *Basic* = default free plan, quota = 50 images / calendar month.  
03. *Pro*   = paid plan,   quota = 500 images / calendar month.  
04. *Max*   = paid plan,   quota = 1 000 images / calendar month.  
05. *Keyword Set*          = the list of keywords a user provides or the system extends.  
06. *Enhanced Keyword Set* = Keyword Set after pressing “Enhance keywords with AI”.  
07. *AI Vision Descriptor* = tags the vision model returns for one image.  
08. *Proposed Filename*    = final, human‑readable name generated for one image.  
09. *Review Table*         = screen listing every original filename beside its Proposed Filename before download.  

### 1. High‑Level Goals
10. The product shall let any authenticated user rename many images in one batch using a combination of user‑supplied keywords and automatic computer‑vision tags.  
11. The product shall output renamed images that are search‑engine‑friendly, syntactically safe for all major file systems, and semantically descriptive of image content.  
12. The product shall monetise via tiered monthly quotas and Stripe‑handled subscriptions.  
hallo