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The configured source value 7 is provenance only and must never be described as the number of platforms studied.","The finalrankingtable is the sole authority for rank, platform mentions, platform share, average rank, and best rank. Ignore any conflicting value embedded in a entity evidence bundle.","The Consensus Ranking table must contain exactly one row per finalrankingtable entity, in that order, using that exact entityname. Never split one ranked entity into two product, model, SKU, or product-line rows, and never add another ranking row for a brand already listed. Put recommended products or plans inside that entity's ranked section.","Platform mentions count only ranking-discovery mentions. Do not substitute the number of platforms that later completed a fit assessment.","Citation IDs inside each entity bundle are local to that entity. Consolidate sources by URL using the supplied source catalog.","The URLs were collected from platform responses and were not independently validated by either writer stage.","Each fitreviewurlorplaceholder is the final site-relative CMS path for that entity's review. Link the entity name to that exact path exactly once in its ranked prose section, outside tables and headings. Never replace it with a run ID, report ID, UUID, or local output path.","Use the exact entity-namespaced citation IDs from the source catalog (e.g. e1:); never transfer a citation between entities."],"methodology":{"fit_rating_contract":["strong","good","mixed","weak","uncertain"],"included_valid_platform_count":7,"maximum_finalists":10,"minimum_mentions":2,"name":"Home Improvement Consensus Index cross-platform AI consensus analysis","platforms_included":["anthropic","deepseek","google","grok","kimi","openai","perplexity"],"platforms_queried":["openai","anthropic","deepseek","grok","perplexity","kimi","google"],"stages":["ranking_discovery","fit_assessment","normalization","editorial_synthesis"],"version":"alias-table-1"},"provenance":{"generated_at":"2026-10-02 12:04:10.953667+00","research_date":"2026-10-02","source_snapshot_sha256":"3abc19bc2f194552d52c73225d6e8dda3f76870f0f7b6aef8df01a0550889955","verification_scope":"public_verification"},"ranking":{"candidates_evaluated":26,"qualified_finalists":10,"ranking_unit":"Window and door manufacturer, dealer, or installation company"},"schema_version":4,"summary":"Marvin is the consensus leader for custom shape windows in this 7-platform study, named by 6 of 7 platforms (85.7% share) at an average listed position of 1.67 and a best position of 1. Pella (5 mentions, 71.4%) and Andersen Circle and Arched Windows (5 mentions, 71.4%, best position 1) are the strongest alternatives for buyers who want a national dealer network with wood, fiberglass, or composite frame choices. Ventana USA is the standout for genuinely one-off vinyl shapes fabricated from customer templates, and Kolbe Windows & Doors is the premium wood and aluminum-clad pick. The study…","target_buyer":"A homeowner with arched, round or otherwise non-standard openings that no stock size will fit.","topic":{"base_category":"Window and Door Replacement","category_criteria":["custom fabrication capability","shape and size range","template accuracy","product range and frame materials","energy performance ratings","installation quality","lead time","price transparency","product and labor warranty","customer review strength"],"geography":"United States","slug":"best-custom-and-specialty-shape-window-manufacturers","title":"Best Custom and Specialty Shape Window Manufacturers","use_case":"custom shape windows"}}