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Desktop / Research Tools
Ongoing

Hujjah

Privacy-first offline Islamic research engine with Quran, hadith, and AI chat.

Live Demo Repo
Period
Apr 2026 – May 2026
Role
Solo Developer

The Problem

Islamic research tools require internet access, leak privacy to third-party APIs, and lack proper hadith chain analysis.

The Approach

A privacy-first, offline-capable Islamic research engine with local AI inference, full Quran/hadith search, and sanad chain visualization.

Impact Highlights

  • Made 111 Quran translations searchable offline by indexing the full corpus into a native SQLite vault with FTS5 and Arabic diacritic normalization — no cloud at runtime.
  • Eliminated hallucination risk in Islamic Q&A with a RAG pipeline using BGE-M3 embeddings + llama.cpp (Qwen2.5 1.5B), grounding every response in sourced verses and hadith.
  • Made hadith chain scholarship accessible with an interactive sanad explorer — BFS graph traversal, React Flow infinite canvas, chain quality indicators, narrator enrichment via Wikidata/Wikipedia.
  • Solved the Bengali Islamic content gap with a three-tier hadith corpus, Sunnah.com import + github-classic Bengali fallback (re-linking 24K translations), and bilingual AI chat.
  • Delivered uninterrupted Quran audio by proxying the Islamic Network CDN with verse highlight/scroll, stay-in-surah auto-play, and resume support.
  • Shipped a production desktop app with Tauri 2.0 + Docker Compose, Cloudflare Tunnel deploy, fully offline — no account, no server, no API keys for core features.

Tech Stack

Next.jsTauri 2.0SQLiteFTS5llama.cppTransformers.jsONNXBGE-M3

Scope of Work

11
  • Tauri 2.0 + Next.js monorepo with native SQLite architecture.
  • Arabic FTS5 search with diacritic stripping and multi-language query normalization.
  • AI chatbot migrated to llama.cpp (Qwen2.5 1.5B) with extractive Bengali fallback and language auto-detection.
  • Sunnah.com hadith import pipeline; unified three-tier corpus with grading and translator switcher.
  • Sanad explorer: BFS level assignment, expandable nodes, hadith counts, React Flow draggable nodes, infinite canvas Map view.
  • RadialSanad and ChainPreview views with SVG connectors and GitHub-style edge routing.
  • Narrator search with FTS5 prefix matching, Arabic normalization, multi-language fallback.
  • Quran audio proxy with real progress bar, reciter selection, per-verse controls.
  • Settings page: appearance, AI model, Arabic font switcher, database sections.
  • Dark/light mode, Bengali/Arabic bilingual UI, mobile nav, collapsible chain sections.
  • Docker Compose, Cloudflare Tunnel deploy, Dockerfile with static path and sqlite3 binding fixes.