Web Device MD structure · ARC 2.0.0-beta.28

heading

Web Device Markdown structure `heading`: purpose, boundaries, author entry, evidence, and sample honesty.

Web Device Markdown structure — not an AUP primitive; not a theme/site layout component.

Implementation path: content-reader / slides / embed modules under providers/runtime/web-device/src/.

Purpose

ATX/setext headings become document text nodes with level props.

One unit per page: this page documents only heading.
Do not treat MD structures as AUP primitive contracts (table, media, …).
Experimental or unverified names must not be published as full product capability.

# / setext headings

Web Device document (and slides path where noted).

released

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## Section title

Headings also feed the in-page-toc surface when the docs shell mounts it.

Item	Path
Reader / impl	`content-reader.ts`
Internal matrix	`docs/aup/capability-matrix.md` §6 (internal, non-routed)
Matrix row concept	`md-structure` · `heading`

Also feeds in-page TOC surfaces.