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Svelte changelog digest

Jun 23 - Jun 29, 2025. Useful releases, risky migrations, and noisy updates from the Svelte channel.

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Svelte updates in 2025-w26

Trace Waterfall View Improvements

  • Added support for displaying standalone INP spans in the trace waterfall view.
  • Introduced a streamlined list of attributes attached to each span.
  • Enabled visualization of logs linked to specific spans.

AI Agent Monitoring — Open Beta

  • Added a unified AI agent monitoring dashboard featuring tracing, tool visibility, model performance metrics, and deep context
  • Enables rapid identification of failures, pinpointing where and why they occurred

v4.1.11

  • Fixed the heuristic to skip candidate migrations inside emit() calls.
  • Added extraction of candidates with variants for Clojure/ClojureScript keywords and support for Vite 7 in @tailwindcss/vite.
  • Documented the new CLI option watch=always.

Sentry Flutter SDK 9.0

  • Adds GA Session Replay for mobile.
  • Introduces feature flags, open‑beta Logs, and native JS error support.
  • Adds Release Health for Flutter Web and improves trace‑error linking.

AI PR Review and Test generation-- Now in Beta

  • Introduce AI-powered PR review and test generation in beta
  • Add @sentry comment in PR to trigger missing test creation and automated code review
  • Provides automated test generation and review for submitted changes