Extractive summary: selects the N most salient sentences via TextRank (TF-IDF cosine + PageRank) — a pure algorithm, no LLM, so deterministic and free of inference cost. Returns the summary and each chosen sentence with a salience score and index. Extractive (selects existing sentences), NOT abstractive/generative — that is the point: reproducible and model-free. Pre-condense a page before an LLM call. Provided text only. Over 1 MB truncated.

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