CircleCI has consolidated three config-breaking changes onto a September 21 cutoff. Teams using legacy v2.0 syntax, out-of-scope parameters or unsupported regex constructs need to migrate before pipelines begin failing at compilation time.
Edge Scripts no longer have to sit behind bunny.net’s automatic cache. New pre-cache hooks can execute before cache lookup, while a separate Cache API lets scripts read, write and delete regional cache entries under application control.
Cloudflare’s RUM measurement model now distinguishes hard navigations, native soft navigations and routing-API fallbacks. For React, Vue, Angular, Svelte and other client-routed sites, the immediate consequence is a metric discontinuity: pageviews and Core Web Vitals can shift without an underlying traffic change.
Sentry has completed a breaking alerting migration. Legacy alert APIs are gone; metric detection now lives in Monitors while notification routing lives in Alerts, and old direct integrations must use the replacement endpoints.