haystack

Build RAG search pipelines with retrievers, rerankers, and generators.

Updated May 2, 2026
One-click install
npx skills add https://github.com/qcmuu/AI-Research-Skills --skill haystack
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: haystack
Source: https://github.com/qcmuu/AI-Research-Skills/tree/main/15-rag/haystack
Command: npx skills add https://github.com/qcmuu/AI-Research-Skills --skill haystack

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires haystack-ai, transformers, sentence-transformers.

What problem does it solve?

Haystack helps you build reliable retrieval-augmented generation (RAG) and search pipelines that combine document retrieval, optional reranking, and LLM generation for production use.

Core Features & Use Cases

  • Production RAG pipeline building: Compose end-to-end flows for retrieve → (rerank/join) → prompt → generate.
  • Hybrid retrieval and reranking: Combine keyword/BM25 and embedding-based retrieval, then rerank with models like cross-encoders.
  • Evaluation-driven development: Measure relevance and faithfulness to improve retrieval and generation behavior.

Example: You have a large enterprise document corpus and need accurate document Q&A with improved answers. Use Haystack to retrieve relevant passages, rerank them, and generate grounded responses, while also running evaluation to validate faithfulness and context relevance.

Quick Start

Install haystack-ai and tell your AI agent to create a basic pipeline that retrieves documents and uses an LLM to answer questions from the retrieved context.

Frequently Asked Questions about haystack

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I build a production RAG pipeline for document question answering?

To build a production RAG pipeline, you compose modular search flows that retrieve passages, optionally rerank them, and generate grounded LLM responses. This requires integrating retrievers, embedders, generators, and evaluators using haystack-ai components.

What is hybrid retrieval and reranking in enterprise search?

Hybrid retrieval and reranking in enterprise search combines keyword or BM25 retrieval with embedding-based retrieval, then reranks the combined results using cross-encoder models to improve passage relevance for large document corpora.

How do I measure and improve retrieval and generation behavior in a RAG pipeline?

You measure and improve RAG pipeline behavior through evaluation-driven development, measuring relevance and faithfulness to validate context relevance. This iterative process helps improve both document retrieval and LLM generation accuracy.

Can I use haystack-ai with transformers and sentence-transformers for multi-step workflows?

Yes, you can use haystack-ai with transformers and sentence-transformers for multi-step workflows. The framework supports modular pipeline composition across large corpora, enabling semantic retrieval, embedding generation, and complex search pipeline steps.

What's the best way to handle accurate document Q&A across a large enterprise corpus?

The best way to handle document Q&A across a large enterprise corpus is to retrieve relevant passages, rerank them with cross-encoders, and generate grounded responses. Running evaluation validates faithfulness and context relevance for improved answers.