# `Nous.Decisions.Store.DuckDB`
[🔗](https://github.com/nyo16/nous/blob/v0.17.3/lib/nous/decisions/store/duckdb.ex#L2)

DuckDB-backed decision graph store.

Nodes and edges live in two DuckDB tables; path, ancestor and descendant
queries are recursive CTEs over the edge table (plain SQL — no DuckPGQ or
other extension to install, so the store works on a stock `duckdbex`).
Traversals are bounded (10 hops for a path, 100 for ancestors/descendants)
and cycle-safe via a visited-path check.

## Options

  * `:path` - database file path (default: `":memory:"`)

## Quick Start

    {:ok, state} = Nous.Decisions.Store.DuckDB.init([])
    node = Nous.Decisions.Node.new(%{type: :goal, label: "Ship v1.0"})
    {:ok, state} = Nous.Decisions.Store.DuckDB.add_node(state, node)

---

*Consult [api-reference.md](api-reference.md) for complete listing*