GuardContentBlock

Defined in: src/types/messages.ts:817

Guard content block for guardrail evaluation. Marks content that should be evaluated by guardrails for safety, grounding, or other policies. Can be used in both message content and system prompts.

Implements

• GuardContentBlockData
• JSONSerializable<{ guardContent: Serialized<GuardContentBlockData>; }>

Constructors

Constructor

new GuardContentBlock(data): GuardContentBlock;

Defined in: src/types/messages.ts:835

Parameters

Parameter	Type
data	GuardContentBlockData

Returns

GuardContentBlock

Properties

type

readonly type: "guardContentBlock";

Defined in: src/types/messages.ts:823

Discriminator for guard content.

---

text?

readonly optional text?: GuardContentText;

Defined in: src/types/messages.ts:828

Text content with evaluation qualifiers.

Implementation of

GuardContentBlockData.text

---

image?

readonly optional image?: GuardContentImage;

Defined in: src/types/messages.ts:833

Image content with evaluation qualifiers.

Implementation of

GuardContentBlockData.image

Methods

toJSON()

toJSON(): {
  guardContent: {
     text?: {
        qualifiers: GuardQualifier[];
        text: string;
     };
     image?: {
        format: GuardImageFormat;
        source: {
           bytes: string;
        };
     };
  };
};

Defined in: src/types/messages.ts:855

Serializes the GuardContentBlock to a JSON-compatible ContentBlockData object. Called automatically by JSON.stringify(). Uint8Array image bytes are encoded as base64 string.

Returns

{
  guardContent: {
     text?: {
        qualifiers: GuardQualifier[];
        text: string;
     };
     image?: {
        format: GuardImageFormat;
        source: {
           bytes: string;
        };
     };
  };
}

Name	Type	Description	Defined in
guardContent	{ text?: { qualifiers: GuardQualifier[]; text: string; }; image?: { format: GuardImageFormat; source: { bytes: string; }; }; }	-	src/types/messages.ts:855
guardContent.text?	{ qualifiers: GuardQualifier[]; text: string; }	Text content with evaluation qualifiers.	src/types/messages.ts:804
guardContent.text.qualifiers	GuardQualifier[]	Qualifiers that specify how this content should be evaluated.	src/types/messages.ts:773
guardContent.text.text	string	The text content to be evaluated.	src/types/messages.ts:778
guardContent.image?	{ format: GuardImageFormat; source: { bytes: string; }; }	Image content with evaluation qualifiers.	src/types/messages.ts:809
guardContent.image.format	GuardImageFormat	Image format.	src/types/messages.ts:788
guardContent.image.source	{ bytes: string; }	Image source (bytes only).	src/types/messages.ts:793
guardContent.image.source.bytes	string	-	src/types/messages.ts:764

Implementation of

JSONSerializable.toJSON

---

fromJSON()

static fromJSON(data): GuardContentBlock;

Defined in: src/types/messages.ts:876

Creates a GuardContentBlock instance from its wrapped data format. Base64-encoded image bytes are decoded back to Uint8Array.

Parameters

Parameter	Type	Description
data	{ guardContent: { text?: { qualifiers: GuardQualifier[]; text: string; }; image?: { format: GuardImageFormat; source: { bytes: string | Uint8Array<ArrayBufferLike>; }; }; }; }	Wrapped GuardContentBlockData to deserialize (accepts both string and Uint8Array for image bytes)
data.guardContent	{ text?: { qualifiers: GuardQualifier[]; text: string; }; image?: { format: GuardImageFormat; source: { bytes: string | Uint8Array<ArrayBufferLike>; }; }; }	-
data.guardContent.text?	{ qualifiers: GuardQualifier[]; text: string; }	Text content with evaluation qualifiers.
data.guardContent.text.qualifiers	GuardQualifier[]	Qualifiers that specify how this content should be evaluated.
data.guardContent.text.text	string	The text content to be evaluated.
data.guardContent.image?	{ format: GuardImageFormat; source: { bytes: string | Uint8Array<ArrayBufferLike>; }; }	Image content with evaluation qualifiers.
data.guardContent.image.format	GuardImageFormat	Image format.
data.guardContent.image.source	{ bytes: string | Uint8Array<ArrayBufferLike>; }	Image source (bytes only).
data.guardContent.image.source.bytes	string | Uint8Array<ArrayBufferLike>	-

Returns

GuardContentBlock

GuardContentBlock instance