GuardContentBlock

Defined in: src/types/messages.ts:836

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:854

Parameters

Parameter	Type
data	GuardContentBlockData

Returns

GuardContentBlock

Properties

type

readonly type: "guardContentBlock";

Defined in: src/types/messages.ts:842

Discriminator for guard content.

---

text?

readonly optional text?: GuardContentText;

Defined in: src/types/messages.ts:847

Text content with evaluation qualifiers.

Implementation of

GuardContentBlockData.text

---

image?

readonly optional image?: GuardContentImage;

Defined in: src/types/messages.ts:852

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:874

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:874
guardContent.text?	{ qualifiers: GuardQualifier[]; text: string; }	Text content with evaluation qualifiers.	src/types/messages.ts:823
guardContent.text.qualifiers	GuardQualifier[]	Qualifiers that specify how this content should be evaluated.	src/types/messages.ts:792
guardContent.text.text	string	The text content to be evaluated.	src/types/messages.ts:797
guardContent.image?	{ format: GuardImageFormat; source: { bytes: string; }; }	Image content with evaluation qualifiers.	src/types/messages.ts:828
guardContent.image.format	GuardImageFormat	Image format.	src/types/messages.ts:807
guardContent.image.source	{ bytes: string; }	Image source (bytes only).	src/types/messages.ts:812
guardContent.image.source.bytes	string	-	src/types/messages.ts:783

Implementation of

JSONSerializable.toJSON

---

fromJSON()

static fromJSON(data): GuardContentBlock;

Defined in: src/types/messages.ts:895

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