The context · October 2025
Next.js 16 was announced in October 2025, including Cache Components and changes to the framework’s development and routing conventions. [1]
A proposed project brief inspired by the period’s developments. This is an idea for exploration, not an announced Sansa product, an approved roadmap or a claim of completed client work.
Choose the journeys that matter
List the routes involved in signing in, completing the core task and managing account details. Record rendering, caching and integration assumptions for those routes. Read the target version’s migration guidance before choosing an implementation approach.
Upgrade in an isolated environment
Resolve compatibility issues and verify the important journeys using representative accounts and data. Test stale content, access changes and failed submissions as well as the successful path. Avoid adding unrelated product features while the framework behaviour is changing.
Deliver an operationally useful handover
The proposed result is an upgrade branch, a compatibility record and a release checklist tied to observed behaviour. Include monitoring and a recovery route for the deployment. The decision to release should be based on the application’s checks, not solely on the framework’s new capabilities.
Source & context
Next.js · Next.js 16, 21 October 2025This retrospective was written for the archive in September 2026. The linked primary source documents the announcement or event; the practical interpretation and proposed approach are Sansa’s editorial perspective. Public examples do not imply a client relationship. Product capabilities and guidance may have changed since the period discussed.
Another perspective · October 2025
Caching is a product decision hiding in infrastructure
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