Project ideas from Hacker News discussions.

Don't classify, hallucinate

📝 Discussion Summary (Click to expand)

Top Themes of the Discussion

# Theme Key Takeaway & Supporting Quote
1 LLM‑augmented categorization using embeddings Many users rely on embedding pools to fetch a shortlist of candidate categories, then feed that list to an LLM for final classification. “Using a Nano model, a tad worse than shipping a vocabulary to a larger OpenAI model… no classification is perfect.”softwaredoug
2 Cost & latency concerns Deployments stress the need for fast, cheap inference; a 2‑second LLM call was called “pretty slow” and “a huge impact”. “Isn't search engines quicker than calling a LLM? … 2s LLM call is pretty slow.”Colegno
3 Critiques & alternative lightweight approaches Several commenters argue that simple embedding similarity or HyDE‑style hallucinated “prototype” docs often outperform LLMs and are cheaper/faster. “Just embed the query, compare it to the embedding of the categories, then ship only categories that are close to it in the prompt to a smaller model?”tantalor

These three themes capture the most common viewpoints: effective yet expensive LLM pipelines, the pressing need for speed and cost efficiency, and the push toward simpler embedding‑based or hybrid solutions.


🚀 Project Ideas

LLM‑Query Router

Summary

  • Routes user queries to the most relevant taxonomy category while dramatically cutting token usage.
  • Provides a deterministic fallback path for edge cases, improving reliability for high‑traffic APIs.

Details

Key Value
Target Audience E‑commerce platforms, search engines, API providers
Core Feature Query‑to‑category routing with confidence‑based fallback
Tech Stack Python, DistilBERT + GPT‑4‑lite, FastAPI, PostgreSQL
Difficulty Medium
Monetization Revenue-ready: Pay-per-query API

Notes

  • HN commenters stress that “browsing harms the store if not careful” – this offers a lightweight pre‑filter before a full browse.
  • Sparks discussion on embedding‑search vs LLM routing and cost trade‑offs.

TaxonomyGuard AI

Summary

  • Generates synthetic taxonomy entries from product descriptions to expand catalogs without manual tagging.
  • Self‑checks generated categories via embedding similarity to suppress hallucinations.

Details

Key Value
Target Audience Marketplace sellers, product data teams, catalog managers
Core Feature Automated taxonomy expansion with built‑in validation
Tech Stack Llama‑3‑8B, Sentence‑Transformers, Elasticsearch, Docker
Difficulty High
Monetization Revenue-ready: Subscription tier ($49/mo)

Notes

  • Reference to HN insight “Embedding sort gives you a better shortlist” – turns that into a SaaS service.
  • Opens conversation on structured data generation for e‑commerce and costs of LLM‑driven catalog building.

BrowseLite Service

Summary

  • Wraps a user’s browsing session with an LLM overlay that suggests minimal navigation steps to reach desired categories.
  • Lets users confirm or edit suggested pathways before the browser loads extra pages.

Details

Key Value
Target Audience Power shoppers, multi‑category users, UI/UX teams
Core Feature Navigation pathway optimization with confidence scores
Tech Stack Next.js, GPT‑4‑Turbo, GraphQL API, Redis cache
Difficulty Low
Monetization Revenue-ready: Freemium (free tier, $15/mo premium)

Notes

  • Directly addresses HN concern “Browsing can harm the store if not careful” by offering a non‑intrusive guidance layer.
  • Provides a practical utility for reducing latency and improving conversion while showcasing LLM UI innovation.

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