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AI in action: Adding AI-powered reviews

Blog post from Firebase

Post Details
Company
Date Published
Author
Alexander Nohe, Jeff Huleatt
Word Count
2,463
Company Posts That Month
6
Language
English
Hacker News Points
-
Post removed?
No
Summary

Friendly Eats adds an AI-assisted feature that suggests a one-to-five-star restaurant rating while users write reviews, while preserving the reviewer’s ability to override the recommendation. The implementation uses Firebase AI Logic, which protects Gemini credentials through a proxy, supports Firebase App Check to reduce abuse, and can prioritize an on-device model such as Gemini Nano before falling back to the lower-cost Gemini 2.5 Flash Lite model. To improve reliability and simplify client handling, the app requests structured JSON output containing only the rating and uses prompt examples to establish how positive and negative review language maps to scores. Input is debounced to avoid inference requests on every keystroke, and Firestore security rules validate that submitted reviews contain text and ratings remain within the allowed one-to-five range. The accompanying TypeScript and React examples show Firebase initialization, model configuration, rating generation, UI updates, loading feedback, and manual rating controls, illustrating an approach that balances usability, cost, security, and user control; as of August 2026, Vertex AI is called Agent Platform.

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