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

# Read eval source

> Read the editable source behind one eval before changing it; returns the eval source document with its source text, edit mode and the reasons it can only be edited as source.

`evalSource(projectReference: String!, evalId: String!, input: WriteTargetInput): EvalSource!`

Requires project.evals.read.

## Arguments

| Argument | Type | Required |
| - | - | - |
| `projectReference` | [`String!`](https://veryfront.com/docs/cloud/graphql/types/string) | Yes |
| `evalId` | [`String!`](https://veryfront.com/docs/cloud/graphql/types/string) | Yes |
| `input` | [`WriteTargetInput`](https://veryfront.com/docs/cloud/graphql/types/writetargetinput) | No |

## Input fields

### input

[`WriteTargetInput`](https://veryfront.com/docs/cloud/graphql/types/writetargetinput)

| Field | Type | Required | Description |
| - | - | - | - |
| `sourceTargetKind` | [`WriteTargetKind`](https://veryfront.com/docs/cloud/graphql/types/writetargetkind) | No | The source to write; default project. |
| `targetBranchId` | [`ID`](https://veryfront.com/docs/cloud/graphql/types/id) | No | Required with the kind preview\_branch. |

## Response

Returns [`EvalSource!`](https://veryfront.com/docs/cloud/graphql/types/evalsource). Open the type for its fields and nested types.

| Field | Type | Description |
| - | - | - |
| `id` | [`ID!`](https://veryfront.com/docs/cloud/graphql/types/id) | |
| `name` | [`String!`](https://veryfront.com/docs/cloud/graphql/types/string) | |
| `description` | [`String`](https://veryfront.com/docs/cloud/graphql/types/string) | |
| `targetKind` | [`EvalTargetKind!`](https://veryfront.com/docs/cloud/graphql/types/evaltargetkind) | |
| `target` | [`String!`](https://veryfront.com/docs/cloud/graphql/types/string) | |
| `sourcePath` | [`String!`](https://veryfront.com/docs/cloud/graphql/types/string) | |
| `exportName` | [`String!`](https://veryfront.com/docs/cloud/graphql/types/string) | |
| `source` | [`String!`](https://veryfront.com/docs/cloud/graphql/types/string) | The source text of the eval file. |

[All fields of `EvalSource`](https://veryfront.com/docs/cloud/graphql/types/evalsource).

Types marked with `!` cannot be null. Lists use `[Type]` notation. The [type index](https://veryfront.com/docs/cloud/graphql/schema.md) lists all published input and response types.

## Example

```graphql title="query.graphql" theme={null}
query EvalSource($projectReference: String!, $evalId: String!, $input: WriteTargetInput) {
  evalSource(projectReference: $projectReference, evalId: $evalId, input: $input) {
    id
    name
    capabilities
    description
    dynamicFields
  }
}
```

```json title="variables.json" theme={null}
{
  "projectReference": "00000000-0000-4000-8000-000000000001",
  "evalId": "00000000-0000-4000-8000-000000000001"
}
```

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  Query

  Variables (JSON)
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