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1. NewsShip1 Oct 2026

   Claude Sonnet 4.5 deprecation — migrate to Sonnet 5.5 by Nov 30

   Claude Sonnet 4.5 (`claude-sonnet-4-5-20250929`) deprecated, retires Nov 30, 2026. Migrate to Sonnet 5.5 — any agent pinned to 4.5 needs a plan.

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