The Timeline
Summer ‘26 release notes went live April 22, 2026. Preview sandboxes upgrade around May 9. Production weekends are June 5, 12, and 13 — your instance goes during one of those windows depending on pod. Confirm your exact window in Trust.
What’s in the Box
Agentforce is no longer a separate layer — it’s woven into Sales Cloud views, marketing authoring tools, and service console workflows. A new Field Access tab in Object Manager consolidates field-level security visibility. LWC preview now works directly in VS Code or browser.
Flow and Tableau
Flow control gains batch sizing and cleaner error handling — production automation stabilizes. Tableau Next is GA for ISVs, opening embedded analytics paths. The AI Content Summarizer component is available in Lightning App Builder.
What to Prepare
Run your regression suite against preview. Audit Agentforce topic instructions — Summer ‘26 tweaks Atlas default behavior. Trust Layer defaults are stricter in this release; re-audit masking rules on any existing prompts.