# JolSetu

- **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:** [Rudra Sarker](https://cerebralvalley.ai/u/rudra496)
- **GitHub:** https://github.com/rudra496/jolsetu
- **Demo video:** https://github.com/rudra496/jolsetu/raw/main/JolSetu_Vision_Demo.mp4
- **Gallery:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1139

JolSetu Vision turns a $1 Gutzeit arsenic kit into a smart sensor: photograph the reacting vial next to its reference card and Meta AI reads it. SAM 3.1 segments the liquid column and the reference card out of messy real-world photos (text prompts liquid + chart), masks are decoded with Meta official meta-sam-parser package, and calibrated CIELAB colorimetry matches the mean color to the kit swatches. Muse Spark explains the result in spoken Bangla with SAFE/UNSAFE/RETEST verdicts and next steps, Muse Image draws pictorial safety sheets for low-literacy families, and the agent loop auto-logs every reading into JolSetu tamper-proof well registry (6,593 real Araihazar wells). Built on the shipped JolSetu PWA (Xylem GSIC 2026). Everything new in this submission was built Oct 26 - Nov 4, 2026; the README section and commit history mark exactly what is new.

## More from Meta Global AI Developer Hackathon

- [Nanang](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1136)
- [KineticLab](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1137)
- [Esmada Zimba](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1138)
- [Antiscamplus](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1140)
- [Amuseworthy](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1141)
- [HSP](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1142)

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Markdown version of https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1139. Site index for agents: https://cerebralvalley.ai/llms.txt · full text: https://cerebralvalley.ai/llms-full.txt