---
title: Learn
description: Understand the architecture, retrieval method, and evidence contract behind Sci RAG Kit.
---

# Learn

These pages explain what happens between a source document and a cited answer, including the decisions that deliberately keep the system small.

<div class="srag-rows" markdown>

[<span class="srag-row__title">Architecture</span><span class="srag-row__copy">Follow ownership across packages, storage, concurrency, serving, and the five supported extension seams.</span>](architecture.md){ .srag-row }

[<span class="srag-row__title">Methodology</span><span class="srag-row__copy">Judge chunking, graph extraction, fusion, answering, and evaluation from the reasoning and evidence behind each choice.</span>](methodology.md){ .srag-row }

[<span class="srag-row__title">Evidence and rights</span><span class="srag-row__copy">See how provenance, citations, license classes, and metadata scope remain attached before and after ranking.</span>](evidence-and-rights.md){ .srag-row }

[<span class="srag-row__title">Glossary</span><span class="srag-row__copy">Translate RAG, RRF, HyDE, ablation, calibration, and corpus fingerprints into the meanings used by this project.</span>](glossary.md){ .srag-row }

</div>

Start with [Architecture](architecture.md) if you want to modify code. Start with [Methodology](methodology.md) if you need to defend the approach in a research or engineering review.
