diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4ca1c0a..e8fe20a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,15 @@ project follows [Semantic Versioning](https://semver.org/).
   before acquiring more work. Task and cancellation authority deadlines retain
   their original bounds.
 
+## [2.5.0] - 2026-10-18
+
+### Added
+
+- Replay cooperative cancellation at an original completion-waiting Nexus
+  service call. Cooperative workers advertise support for the owned
+  `workflow_run` binding. Delivery requires a compatible runtime and preserves
+  the original cancellation request and cleanup deadline.
+
 ## [2.4.2] - 2026-10-15
 
 ### Fixed
diff --git a/composer.json b/composer.json
index 2239ec9..69b3012 100644
--- a/composer.json
+++ b/composer.json
@@ -82,7 +82,7 @@
             }
         },
         "durable-workflow": {
-            "product-train": "2.4.2",
+            "product-train": "2.5.0",
             "supported-server-versions": "2.5.0",
             "worker-protocol-version": "1.20",
             "control-plane-version": "2",
diff --git a/docs/portal/build/workflows-activities.md b/docs/portal/build/workflows-activities.md
index 4db697b..2c2e655 100644
--- a/docs/portal/build/workflows-activities.md
+++ b/docs/portal/build/workflows-activities.md
@@ -67,9 +67,6 @@ fresh-construction correction is not released.
 
 ## Call a registered service
 
-This authoring API is introduced in the PHP SDK 2.3 prerelease. Install it with
-`composer require durable-workflow/sdk:^2.3@RC`.
-
 Use `serviceOperation()` inside a workflow to invoke a Server service endpoint.
 The call pauses until Server records its result. Worker restarts replay the same
 call identity and result without submitting another operation.
@@ -110,6 +107,13 @@ Service operations currently run sequentially outside cancellation scopes and
 operation groups. The worker reports `service_operations_unavailable` when the
 connected runtime does not advertise the command.
 
+With cooperative cancellation enabled, a completion-waiting call can deliver
+cancellation at its original service-call boundary. The runtime must advertise
+`nexus_cooperative_cancellation` for the `workflow_run` binding. The caller
+keeps its original cleanup deadline while its owned target finishes cleanup.
+Admission-only calls do not gain this waiting boundary, and returning an
+existing workflow does not grant cancellation ownership over it.
+
 ## Fan out durable work and join it once
 
 `all()` (also available as `parallel()`) captures one durable operation from each closure, schedules every leaf in one workflow-task completion, then suspends the Fiber until the group can join. The returned array always follows declaration order, even when the Server records completions in another order:
diff --git a/docs/quickstart-contract.json b/docs/quickstart-contract.json
index 54a3cb1..39cd3cb 100644
--- a/docs/quickstart-contract.json
+++ b/docs/quickstart-contract.json
@@ -3,9 +3,9 @@
   "schema_version": 2,
   "package": {
     "name": "durable-workflow/sdk",
-    "published_version": "2.4.2",
-    "composer_requirement": "2.4.2",
-    "onboarding_requirement": "^2.4"
+    "published_version": "2.5.0",
+    "composer_requirement": "2.5.0",
+    "onboarding_requirement": "^2.5"
   },
   "runtime_targets": {
     "server": {