list block

This canonical lookup describes the published list interaction shape, the present renderer support, its return path, and the trust boundary that applies when it is shown to a person.

Type	Contract	Agent may send	Platform may produce	Web renderer	Mobile renderer
list	Published	Allowed	No documented platform producer.	ListBlock	ListBlockView

list

Allowed

A titled bounded list of up to fifty short lines.

Return path

None; this is display content.

Trust and visibility

Agent-provided display content; no platform authority is attached. Every item is untrusted text that clients escape.

Stability

Available end to end.

Field	Required	Published constraint
type	Yes	literal "list"
title	Yes	string · 1–200 characters
items	Yes	array · 1–50 items · items: string · 1–500 characters

JSON

{
  "type": "list",
  "title": "What I checked",
  "items": [
    "Fare rules",
    "Seat availability",
    "Baggage allowance"
  ]
}

Web preview

What I checked

Fare rules
Seat availability
Baggage allowance