2.6.0-rc.1

Preview for testing completion-waiting Nexus cancellation. Stable remains 2.5.32.

• Deliver cancellation at the original owned service-call boundary and wait for the linked workflow's cleanup.
• Preserve the original call, cancellation lineage and cleanup deadline through duplicate requests and cold replay. An existing returned run does not grant cancellation ownership.
• Service mode requires a compatible runtime and SDK advertising nexus_cooperative_cancellation. A pinned Server image does not change when this package is published.

Exact Composer requirement: durable-workflow/workflow:2.6.0-rc.1.

Source qualification and limits: #840. The actual published PHP/Python cohort, Server preview image and downstream inspection are being qualified under #753. This preview does not claim that acceptance is complete.