# Rajan Bajaj

- **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:** [Rajan Bajaj](https://cerebralvalley.ai/u/rbajaj97)
- **GitHub:** https://github.com/rajanbajaj/openlens
- **Demo video:** https://www.youtube.com/watch?v=8J1IAJMVaL8
- **Gallery:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1024

OpenLens is a modular, extensible, AI-powered search engine. Basic search is the core. Everything advanced is an independent, configurable plugin — add, remove, enable, or disable without touching
  core.

  Original idea in one line: search you can inspect — your own crawl, your own ranking, every decision explained.

  How it works:

  • Provider independence: OpenSearch, authenticated external APIs (e.g. Bing), and a custom index built by OpenLens crawler + indexer. All return normalized results through one provider manager. Custom
    index is the long-term differentiator — now the Postgres-backed default, single source of truth, no external search dependency.
  • 10-stage deterministic pipeline: query processing → provider selection → retrieval → normalization → mandatory filtering → deduplication → scoring → reranking → enrichment → response assembly.
  • Plugins own capabilities: query understanding, child-safe / privacy filters, trust scoring, fairness / perspective reranking, enrichment, AI summarization. Optional failures isolate, mandatory safety
    fails closed.
  • Ranking owned by OpenLens, not providers: relevance, credibility, freshness, diversity, plus per-mode profiles for default, child-safe, news, shopping, travel. Gender-neutral, evidence-aware — never
    popularity over truth.
  • Safety by design, AI as optional: safety and privacy enforced in the tool layer, not the prompt. AI Mode answers only from the index with [n] citations, Powered by … attribution, and honest
    extractive fallbacks.
  • Values: neutrality over engagement, safety by construction, transparency, your data / your index. Non-goals: maps, web-scale crawling, third-party search APIs, tracking profiles.

## More from Meta Global AI Developer Hackathon

- [Spartans](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1021)
- [zeroflaw](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1022)
- [Golden services](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1023)
- [poxonetics](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1025)
- [LessonCast](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1026)
- [KrishiBondhu](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1027)

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