Agent with S3 Pre-signed URL Input

1"""S3 pre-signed URL input with Gemini.
2
3Pass files from S3 using pre-signed URLs without downloading.
4Supports files up to 100MB. Requires Gemini 3.x models.
5"""
6
7import boto3
8from kern.agent import Agent
9from kern.media import File
10from kern.models.google import Gemini
11
12s3_client = boto3.client("s3")
13presigned_url = s3_client.generate_presigned_url(
14    "get_object",
15    Params={
16        "Bucket": "kern-public",
17        "Key": "recipes/ThaiRecipes.pdf",
18    },
19    ExpiresIn=3600,
20)
21
22agent = Agent(
23    model=Gemini(id="gemini-3-flash-preview"),
24    markdown=True,
25)
26
27agent.print_response(
28    "What is this document about? Answer in one sentence.",
29    files=[
30        File(
31            url=presigned_url,
32            mime_type="application/pdf",
33        )
34    ],
35)