evidence-anchor/workplans/EANCH-WP-0003-non-pdf-selectors.md

id	type	title	domain	repo	status	owner	topic_slug	created	updated	spec_refs	state_hub_workstream_id
EANCH-WP-0003	workplan	Non-PDF selectors: HTML/Markdown DOM range + structural anchoring	infotech	evidence-anchor	proposed	codex	citation_evidence_mvp	2026-07-08	2026-07-08	INTENT.md SCOPE.md ../citation-evidence/wiki/SharedContracts.md ../citation-evidence/docs/decisions/ADR-0006-selector-ownership-split.md	04f8a4b7-41fe-4546-8471-364a8b9a6c26

EANCH-WP-0003 — Non-PDF Selectors (HTML / Markdown)

Goal

Extend anchoring beyond PDFs to non-paginated documents (HTML, Markdown), delivering the DomRangeSelector and StructuralSelector concepts that INTENT.md names but the MVP left as never. The extracted package already models format-neutral resolution (DocumentViewerAdapter, canonical-text selectors); this workplan fills in the DOM branch of SelectionCapture and a concrete HTML/Markdown viewer adapter.

Depends on the extraction (EANCH-WP-0001) being complete. Independent of the resolution-hardening track (EANCH-WP-0002) except where both touch the shared enum — coordinate contract changes in the umbrella wiki first.

Background

• src/types.ts: DomSelectionCapture = never (reserved) — the capture union only has a PDF branch today.
• citation-engine shared selector types already declare DomRangeSelector and StructuralSelector as never placeholders; promoting them is a shared-contract change and must land in citation-engine first (ADR-0006: selector types live in engine).

Task Breakdown

T01 — Contract: promote DomRange/Structural selector types in citation-engine

id: EANCH-WP-0003-T01
status: todo
priority: high
state_hub_task_id: "de7df94f-2ddf-4920-949e-6e693131a9de"

Define the real DomRangeSelector and StructuralSelector shapes (DOM path + range offsets; heading/section/block/AST path) in citation-engine's shared selector module, plus the DomSelectionCapture payload contract in the wiki. Land this in the engine + SharedContracts.md before writing anchor behavior.

T02 — Selector creation from a DOM/Markdown selection

id: EANCH-WP-0003-T02
status: todo
priority: high
depends_on: [T01]
state_hub_task_id: "aa1bc68d-c15a-41e0-813d-c4ccec4914c9"

Implement createSelectors for the DOM branch: build TextQuote + TextPosition (against canonical text) plus DomRange + Structural selectors from a captured DOM selection. Add unit tests mirroring the PDF create tests.

T03 — Resolution for non-paginated documents

id: EANCH-WP-0003-T03
status: todo
priority: high
depends_on: [T02]
state_hub_task_id: "2bdedc91-1ed2-41ed-b4a0-a9a0d7a6b4b0"

Extend resolveSelectors to resolve DomRange/Structural selectors and rank them in the confidence ladder alongside the existing text selectors, keeping paginated (PDF) and non-paginated resolution on shared concepts. Tests for re-render stability (structural fallback when offsets shift).

T04 — HTML/Markdown viewer adapter

id: EANCH-WP-0003-T04
status: todo
priority: medium
depends_on: [T03]
state_hub_task_id: "286267fe-d348-4494-bbe2-dd7818bcadbd"

Add a DocumentViewerAdapter implementation for rendered HTML/Markdown (selection capture, scroll-to-target, highlight render), behind a subpath export analogous to evidence-anchor/pdf, with viewer-specific deps confined to that boundary.

T05 — Verification + close-out

id: EANCH-WP-0003-T05
status: todo
priority: high
depends_on: [T04]
state_hub_task_id: "9ff39c83-eca8-46a1-9b28-8a728ddf220d"

Package green (pnpm test/typecheck/lint); engine contract change verified in citation-engine; any umbrella consumer green; fix-consistency clean; progress note.