git:20260811.925f2d0 to git:20260924.29cdc2b

+ ## Never store book extractions

+

+ Book extractions, book summaries and chapter-by-chapter notes must never be stored in this

+ repository (no `book-extractions/`, `extracted-books/` or `docs/book-study/` folder, no

+ `*-extraction.md` book files). Keeping them infringes copyright. Knowledge from purchased books

+ enters only as paraphrased, task-oriented skill content and `references/` files (procedures,

+ decision rules, checklists, templates, original worked examples) with a short citation

+ (Author (Year) *Title*). Verbatim quotations stay rare and under 25 words. Never cite a local

+ ebook path or shadow-library file name. Staging notes live outside the repository and are never

+ linked from skills. `scripts/source_ingestion_guardrail.py` (also run by

+ `scripts/skill_catalog_guardrails.py`) fails if an extraction folder exists, a `*-extraction.md`

+ book file exists, or a Markdown file links into an extraction folder. Plan and audit documents

+ may name books but must not store their content.

+