Subsection Polisher (local, pre-merge)

Purpose: upgrade one sections/S<sub_id>.md (H3 body-only) so it reads like survey prose before you merge into output/DRAFT.md.

This is intentionally local: fix one unit at a time, rerun gates, and converge without rewriting the whole paper.

Role cards (use explicitly)

Local Section Editor

Mission: improve one H3’s argument density and paper voice without changing citation keys.

Do:

• Rewrite the opener as tension -> why it matters -> thesis (end paragraph 1 with thesis).
• Add explicit contrasts and one evaluation anchor when missing.
• Add a subsection-specific limitation that changes interpretation.

Avoid: