item/delta

Streaming append to an open item’s field path (ephemeral-sourced, no sourceRange; opt-out-able).

Parameters

Type: ItemDeltaParams

item/delta params: a UTF-8-safe streaming append to an open item’s field. Ephemeral-sourced by definition: this params object has no sourceRange member at all. Deltas never bump revision.

Field	Type	Stability	Presence	Description
delta	string		required	The appended text; concatenation of a field path’s deltas in cursor order equals that field’s value on item/completed unless the surface saturated.
field	string		optional	Dotted field path the append targets ("summary.0", "output", …); absent means "text".
itemId	string		required	The open item being appended to.
sessionId	string		required	The owning session.
viewCursor	string		required	Opaque, strictly monotonic view cursor.

Source

schema/msp/experimental/msp.schema.json#/notifications/item~2Fdelta

{
  "description": "Streaming append to an open item's field path (ephemeral-sourced, no sourceRange; opt-out-able).",
  "params": {
    "$ref": "#/$defs/ItemDeltaParams"
  }
}