> ## Documentation Index
> Fetch the complete documentation index at: https://docs.platform.nora.my/llms.txt
> Use this file to discover all available pages before exploring further.

# Retrieval presets

> Save a retrieval configuration and reuse it across Agents.

A **Retrieval preset** is a named bundle of retrieval settings. Instead of tuning every Agent by hand, you tune once and reuse.

## Anatomy of a preset

* **Name** — how you'll refer to it.
* **Top K** — how many chunks to return per query. Default 6.
* **Score cutoff** — minimum fused score to include. Default 0.15 (RRF space).
* **Vector weight** / **Keyword weight** — hybrid balance.
* **Reranker** — optional cross-encoder rerank pass on the top 20 candidates. Improves quality; adds \~200ms latency.
* **Query expansion** — on/off, count.
* **Filters** — always-on metadata filters.
* **Grounding** — verify against causal graph, on/off.

## Creating a preset

1. **Workspace → Retrieval presets → New**.
2. Set the knobs.
3. Test with a few real queries.
4. Save.

Attach to an Agent from the Agent block's Inspector, **Retrieval preset** field.

## Common presets to start from

Nora ships three built-in presets you can duplicate and modify:

* **Balanced (default)** — hybrid, top 6, no reranker. Good general starting point.
* **Precise** — hybrid + reranker + higher cutoff. For high-stakes answers where quality > latency.
* **Fast** — keyword-only, top 4, no reranker. For live chat where sub-second response matters.

## Per-Agent overrides

Sometimes an Agent needs a slight variation. You can override individual preset fields on the Agent without cloning the whole preset — the Inspector shows an "override" indicator when a field diverges from the preset.

## Preset versions

Presets are versioned like Flows. Changing one doesn't affect production runs until you publish the Agent that uses it. This means you can safely tune a preset in Draft and A/B test the difference.

## Testing multiple presets side-by-side

In the preset editor, hit **Compare**. Pick 2-3 presets and a query. Nora runs the query against each and shows the ranked results side by side with score breakdowns.

Great for choosing between a "faster but noisier" and "slower but tighter" configuration.