# Gifty Tech

- **Event:** [Meta Global AI Developer Hackathon](https://cerebralvalley.ai/e/meta-ai-developer-hackathon)
- **When:** Oct 26, 12:00 PM – Nov 4, 9:00 PM (EST)
- **Where:** Online
- **Team:** [Hung Nguyen](https://cerebralvalley.ai/u/HungGiftyTech)
- **GitHub:** https://github.com/deskcorvn/ChoZ-agent
- **Demo video:** https://youtu.be/ZX22A_AQk5k
- **Gallery:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1615

Chợ Z is Gifty Tech's marketplace inside Zalo, used by small Vietnamese sellers who list from a phone. Listing is the bottleneck: typing a title, price, stock and description on a phone takes over a minute per product and photos are poor. The Chợ Z listing agent (built during this hackathon) turns one photo and one sentence spoken in Vietnamese into a checked listing in about 20 seconds for about two cents.

Muse Voice Transcribe hears the seller; Muse Spark 1.3 drafts the listing as strict JSON and asks at once if the stock was not said; the draft is grounded in the producer's catalog (retrieval with sources: the pack label beats the price list beats the seller's words), and a second Spark pass checks every claim against the photo and the marketplace's written rules, citing the rule. SAM 3.1 cuts out the real product onto a studio room painted by Muse Image.

It is built to hold up in production: prompt-injection on photos is quoted and ignored, contact data is masked before anything leaves the server, prohibited items are blocked by the model and by a rule in code, someone else's or an AI-generated photo is flagged, sellers can appeal a block to a person, every decision goes into a hash-chained audit log, and the agent is also an MCP server whose publish always needs the seller. 193 live runs are published with confidence intervals, including the one miss we found and fixed. For the same listing it can also make a short promo: Muse Image paints scenes around the real box and Kling renders them over MCP.

## More from Meta Global AI Developer Hackathon

- [Devcules](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1612)
- [Sahil Singh](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1613)
- [KisanAi](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1614)
- [Nikita goyal](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1616)
- [Gateward](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1617)
- [StackOne](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1618)

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Markdown version of https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1615. Site index for agents: https://cerebralvalley.ai/llms.txt · full text: https://cerebralvalley.ai/llms-full.txt