Citation Injector (deterministic baseline edits; budget-as-constraints)

Purpose: make the pipeline converge when the draft is:

• locally citation-dense but globally under-cited (too few unique keys), or
• overly reusing the same citations across many subsections.

This skill is intentionally conservative and scriptable:

• the script edits output/DRAFT.md directly using the budget report as constraints
• injections stay evidence-neutral (NO NEW FACTS) and use only in-scope keys already listed for each H3

Inputs

• output/DRAFT.md
• output/CITATION_BUDGET_REPORT.md (from citation-diversifier)
• outline/outline.yml (H3 id/title mapping)
• citations/ref.bib (must contain every injected key)

Outputs