Winter '26 for Developers

Slide deck from my talk on the key features for developers in the Winter '26 release of Salesforce. Presented to the London Salesforce Developer Trailblazer Group on 15th October 2025

Transcript

1. Winter ‘26 For Developers 1 Keir Bowden, CTA, MVP HoF
2. General
3. TLS Certificates CA/Browser Forum 25-0 unanimous decision Improved security Compromised certificates “self-destruct” Lifespan reducing October 2025 - 398 days March 2026 - 200 days March 2027 - 100 days March 2029 - 49 days Look at automated rotation
4. Test Discovery API Test Runner API API OAuth 2.0 Device Flow Authentication removed September 2, 2025 SOAP API login() call not available in API 65.0 Retired from API 31.0 - 64.0 in Summer ‘27 “Will no longer be supported and no longer available”
5. New deployment API states - Finalizing Deploy - Finalizing Deploy Failed API External Services Usage in Limits API - Active Objects - Active Operations - Object Properties - Objects - Operations - Registrations
6. Deployment Size
7. Sort List Views by Multiple Columns
8. Permissions Automatic Permission Set Licenses Removal after unassigning Permission Sets/Groups, except: - Updates made through user access policies - License is required by another permission set/group - Removing permission set from group - Unassigning >= 50 permission sets/groups at once
9. New Setup Home Page
10. New Setup Home Page
11. Field History Tracking
12. CLI Flow Tests Source Mobility GA sf flow run test - invoke flow tests sf flow get test - display results for specific test run Source tracking identifies moved files Opt out - SF_DISABLE_SOURCE_MOBILITY=true Change source org at sandbox refresh --source-id / --source-sandbox-name
13. SLDS2 - Previous (SLDS1)
14. SLDS2 - New
15. Event Studio Event Publishers Publish method Number of events published Last publish time Event Subscribers Subscription method Number of clients Number of events delivered Last delivery time
16. Artificial Intelligence
17. Preview Agent in VS Code Choose agent Use replay debugger Requires connected app
18. Agentforce Vibes FKA Agentforce for Developers bobbuzz.me.uk/AFVibesDataModel
19. Low Code
20. LWC Local Actions in Screen Flows
21. LWC Local Actions in Screen Flows
22. LWC Local Actions in Screen Flows
23. LWC Local Actions in Screen Flows
24. Generative AI Decisions
25. Generative AI Decisions
26. Use New Records in Flow Immediately
27. Trigger Flow on File Attachment
28. Preview Flow in Theme
29. Preview Flow in Theme
30. Structured Output from Custom Agent Actions
31. Structured Output from Custom Agent Actions
32. Structured Output from Custom Agent Actions
33. Structured Output from Custom Agent Actions bobbuzz.me.uk/FlowAgentOutput
34. Compare Flow Versions
35. Compare Flow Versions
36. Compare Flow Versions
37. Compare Flow Versions
38. Flow Nested Loops (Beta) Requires Also add related records (beta) Autolaunched flows only
39. Pro Code
40. Dynamic Aura Action Boxcar’ing Limits number of actions per Boxcar Based on number of XHR slots More parallel execution Greater variance on request/response Classic Boxcar often sequential, but not guaranteed May expose logic errors Can disable in Setup
41. Lightning Out 2.0 Embed custom LWC (only) in external apps Replaces Lightning Out (beta) Built on Lightning Web Runtime Components in iframes inside shadow DOM Override CSS custom attributes (and other component properties) Supports UI Bridge API
42. Lightning Out 2.0
43. Lightning Out 2.0
44. Apex - Access Modifiers on Abstract/Override Methods
45. Apex - Access Modifiers on Abstract/Override Methods
46. ApexDoc
47. Thank You