AI Dev Tool: Firefox 157 will include

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Preview Code

```python
# AI Dev Tool: FastAPI Pydantic v2 Micro-SaaS Boilerplate with JPEG XL Support
# Description: A production-ready FastAPI boilerplate with Pydantic v2 and support for JPEG XL images
# Author: [Your Name]

from fastapi import FastAPI, UploadFile, File
from fastapi.responses import JSONResponse
from pydantic import BaseModel
from typing import Optional
import uvicorn
from PIL import Image
import io
import os

app = FastAPI()

# Define a Pydantic model for image metadata
class ImageMetadata(BaseModel):
    """Image metadata model"""
    filename: str
    width: int
    height: int
    format: str

# Define a route for uploading images
# ... full runnable version includes tests & documentation