VALIDATION-PLANES-08: Require a list of checkboxes

What it demonstrates

list({everyItem:‘checkbox’, minItems}) requires a list block and constrains each item, reporting offenders at their own line.

Builds on: VALIDATION-PLANES-07: Require a block kind: a table

How it’s done

A TypeScript program against the library API; inline comments show the resulting values and behavior.

import { list } from "markdown-contract";

const c = contract({ body: sections({}, [
  section("Acceptance criteria", {
    content: list({ everyItem: "checkbox", minItems: 1 }),
  }),
]) });
// a plain (non-checkbox) bullet -> content/list/item-kind at that item's line

Surfaces exercised

• list() leaf, everyItem: 'checkbox', minItems (src/core/leaves.ts)
• content/list/item-kind per offending item (src/core/content.ts validateList)
• content/list/min-items