description: ARS deep-research three-way-scan mode — WHY / HOW / WHAT paper comparison model: sonnet

Trigger the deep-research skill in three-way-scan mode. Produces a compact paper shortlist compared by WHY / HOW / WHAT plus a cross-paper synthesis (common WHY, divergent HOW, strongest WHAT, unresolved gap). Lighter than lit-review; escalate to lit-review / systematic-review for full coverage. Fidelity spectrum, low oversight.

Mode reference: MODE_REGISTRY.md § deep-research. Skill entry: deep-research/SKILL.md.