Citation Diversifier (budget-as-constraints) [NO NEW FACTS]

Purpose: fix a common survey failure mode:

• the draft reads under-cited (or reuses the same few citations everywhere)
• the pipeline fails the global unique-citation gate

This skill does not change prose by itself. It produces a constraint sheet: output/CITATION_BUDGET_REPORT.md.

Inputs

• output/DRAFT.md
• outline/outline.yml (H3 ids/titles; used to allocate budgets per subsection)
• outline/writer_context_packs.jsonl (source of allowed_bibkeys_{selected,mapped,chapter,global} per H3)
• citations/ref.bib

Output

• output/CITATION_BUDGET_REPORT.md