# Persona B2B

- **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:** [Abdelhalim Ramzy](https://cerebralvalley.ai/u/halim_ramzy)
- **GitHub:** https://github.com/halim-eng1/persona-b2b-meta-hackathon
- **Demo video:** https://youtube.com/shorts/vMrbJKpD2VI
- **Gallery:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3117

Persona B2B is an autonomous, privacy-first, on-device AI communication and stateful commerce engine for Android. Designed for local commerce and SMBs, it operates as an unattended background daemon that intercepts customer inquiries across text, voice notes, and product images.

The app solves the friction of manual commerce messaging by providing:

Real-Time Multimodal Understanding: Converts WhatsApp voice notes via on-device MediaCodec (16kHz PCM WAV) and transcribes them via Meta's muse-voice-transcribe-1.0. It processes customer product photos via muse-spark-1.3 Vision to match catalog items.

Zero-Cold-Start Deterministic RAG: A lightweight, purely mathematical 384-dimensional feature hashing and BM25 ranking engine featuring local dialect/commerce synonym expansion (e.g., هاتف/موبايل, سعر/بكام), retrieving top-8 relevant context chunks with 0ms model download.

Unified Single-Stage Reasoning: Pipes queries and retrieved knowledge into muse-spark-1.3 for single-pass authoritative answering, automated order JSON extraction, Room DB insertion, and instant quick-reply dispatch.

Dual Operational Modes: Seamlessly toggles between a B2B Merchant Sales Agent and an isolated Personal Executive Assistant.

## More from Meta Global AI Developer Hackathon

- [Team Verdict](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3114)
- [AegisQuorum](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3115)
- [ArkAI](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3116)
- [Escape This Photo](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3118)
- [Vikzar](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3119)
- [Ehtesham Warsi](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3120)

---

Markdown version of https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3117. Site index for agents: https://cerebralvalley.ai/llms.txt · full text: https://cerebralvalley.ai/llms-full.txt