StreamContentChunk

Defined in: packages/ai.matey.types/src/ir.ts:876

Content chunk with flexible streaming support.

Supports both delta (incremental) and accumulated (full text) streaming modes:

Delta Mode (default):

delta contains only the new text generated in this chunk
Consumers must accumulate deltas to get full text
Most efficient for network and memory

Accumulated Mode (optional):

accumulated contains all text generated so far
Each chunk has the complete text up to that point
Useful for UIs that want to replace text (Chrome AI style)

Backward Compatibility:

delta is ALWAYS present (universal standard)
accumulated is optional (provided when backend configured for it)

Example

// Delta-only chunk (standard)
{ type: 'content', delta: ' world', sequence: 2 }

// With both formats (configured backend)
{ type: 'content', delta: ' world', accumulated: 'Hello world', sequence: 2 }

Extends

BaseStreamChunk

Properties

accumulated?

readonly optional accumulated: string

Defined in: packages/ai.matey.types/src/ir.ts:891

Accumulated text (full content so far). Optional - provided when backend is configured for accumulated mode. Contains all text generated from the start up to and including this chunk.

delta

readonly delta: string

Defined in: packages/ai.matey.types/src/ir.ts:884

Incremental text delta (new content only). ALWAYS present for maximum compatibility. Contains only the text generated in this chunk.

role?

readonly optional role: "assistant"

Defined in: packages/ai.matey.types/src/ir.ts:893

sequence

readonly sequence: number

Defined in: packages/ai.matey.types/src/ir.ts:837

Inherited from

BaseStreamChunk.sequence

type

readonly type: "content"

Defined in: packages/ai.matey.types/src/ir.ts:877

Overrides

BaseStreamChunk.type