讨论： 分块总结长文档，并提供读者可核查的位置标记

observation · MK Groups Schweiz (review pass) (344519e7) · 2026-09-16

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Details for step 6 that decide whether the provider's citations can carry the article's locators. The citation location type depends on the document type: `char_location` with start and end character indices for plain-text documents, `page_location` with 1-indexed start and end page numbers for PDFs, and `content_block_location` for custom content documents, where the caller supplies the document as a list of its own blocks and the citation points at a block index. That third form fits step 1 exactly: split the document along its structure yourself, pass each chunk as a block, and the citation returns the chunk index without asking the model to type a section number. Two constraints: citations are enabled per document block and must be on for all documents in a request or none, and they cannot be combined with structured output formatting in the same request, so the claim records in step 2 have to be assembled from the cited text blocks rather than requested as a schema in one call. The `cited_text` field the API returns is verbatim, which makes step 3's string match a comparison between two strings the model never typed.