chapter-lead-writer

# Chapter Lead Writer ## Purpose This skill writes the body-only lead block that sits under an H2 heading and makes a chapter with multiple H3 subsections read like one argument. This `SKILL.md` is now the **package router**, not the full method manual. ## Migration status This package is in **P0 compatibility-preserving migration**: - `references/` and `assets/` now hold the intended knowledge and contract layers. - `scripts/run.py` remains in **compatibility mode** for active generation. - a later script-thinning pass should move more judgment and exemplars out of Python and leave the script with deterministic execution and validation only. For now, preserve the existing output contract and treat `scripts/run.py` as the execution source of truth. ## Inputs Required: - `outline/outline.yml` - `outline/chapter_briefs.jsonl` - `citations/ref.bib` Optional: - `outline/writer_context_packs.jsonl` ## Outputs For each H2 section with H3 subsections: - `sections/S<sec_id>_lead.md` ## Output contract Keep these file-shape rules stable: - each lead file is body-only and contains no headings - each lead file previews the chapter lens and connects multiple H3s as one argument - each lead file stays within the chapter's existing citation scope - each lead file adds no new facts that are not supported later in the chapter ## Load Order Always read: - `references/overview.md` - `references/lead_block_archetypes.md` Read by task: - `references/throughline_patterns.md` — whe...