Source: http://www.poma-ai.com/docs/grill/concepts/

# Concepts

The mental model behind Grill's ingestion pipeline, hybrid retrieval, and prompt-ready output.

## In this section

- [Ingestion](/grill/concepts/ingestion)
  What `POST /grill/ingest` does and how it differs from PrimeCut ingestion.
- [Retrieval](/grill/concepts/retrieval)
  Hybrid search internals — `min_relevance`, `max_tokens`, document scoping.
- [Retrieval tiers](/grill/concepts/retrieval-tiers)
  The three per-query tiers — standard, advanced, maximum — and their credit cost.
- [RetrievalContext format](/grill/concepts/retrieval-context)
  The XML and Markdown grammar Grill returns, sandwich ordering, citations.
- [Document management](/grill/concepts/document-management)
  List, inspect, and delete documents without touching the vector store.