# calculateGroundingScore

**Kind:** Function

**Source:** [`atloria-monorepo/packages/doc-automation/src/v2/stages/stage-11-verification/grounding-checker.ts`](https://github.com/sherkety/atloria/blob/main/atloria-monorepo/packages/doc-automation/src/v2/stages/stage-11-verification/grounding-checker.ts#L139)

Calculate grounding score for entity mentions against known entities.

For each mention, checks if it fuzzy-matches (Jaccard >= 0.5) any known entity.
- score = matchedCount / totalMentions
- Returns 0.5 (neutral) if totalMentions === 0

## Signature

```ts
function calculateGroundingScore(mentions: string[], knownEntities: string[]): GroundingScoreResult
```

## Parameters

| Name | Type |
|---|---|
| `mentions` | `string[]` |
| `knownEntities` | `string[]` |

**Returns:** `GroundingScoreResult`