diff --git a/static/platform-protocol-specs/control-plane-api.openapi.yaml b/static/platform-protocol-specs/control-plane-api.openapi.yaml
index 8b5ae1ca08..766ed29efc 100644
--- a/static/platform-protocol-specs/control-plane-api.openapi.yaml
+++ b/static/platform-protocol-specs/control-plane-api.openapi.yaml
@@ -1,7 +1,7 @@
 openapi: 3.1.0
 info:
   title: durable-workflow.v2.control-plane-api
-  version: "11"
+  version: "12"
   summary: Durable Workflow control-plane HTTP+JSON API
   description: >
     Normative OpenAPI specification for the standalone Durable Workflow
@@ -399,6 +399,53 @@ paths:
         - $ref: "#/components/parameters/WorkflowIdPath"
       responses:
         "200": { $ref: "#/components/responses/ControlPlaneEnvelope" }
+  /workflows/{workflowId}/observation:
+    get:
+      tags: [workflows]
+      operationId: observeWorkflow
+      description: >-
+        Bounded run metadata, projected current waits, the first 50 parent and
+        child links with independent outcomes, and the ten most recent failure
+        references and a history page of 200 events by default. Does not load child
+        histories, decode application values or load the cancellation tree.
+        External payload references remain opaque. The stored current pointer is observed without repair
+        or canonical command validation. Missing evidence stays unknown. Use the
+        existing debug API for full inspection. History cursors authenticate the
+        selected run and preserve the original sequence ceiling.
+      parameters:
+        - $ref: "#/components/parameters/ControlPlaneVersionHeader"
+        - $ref: "#/components/parameters/WorkflowIdPath"
+        - name: search_attribute_keys
+          in: query
+          schema: { type: array, maxItems: 20, items: { type: string, minLength: 1, maxLength: 255 } }
+        - name: history_page_size
+          in: query
+          schema: { type: integer, minimum: 1, maximum: 1000, default: 200 }
+        - name: history_page_token
+          in: query
+          schema: { type: string, maxLength: 4096 }
+      responses:
+        "200": { $ref: "#/components/responses/ControlPlaneEnvelope" }
+  /workflows/{workflowId}/runs/{runId}/observation:
+    get:
+      tags: [workflows]
+      operationId: observeWorkflowRun
+      description: The same bounded observation for one explicit retained run.
+      parameters:
+        - $ref: "#/components/parameters/ControlPlaneVersionHeader"
+        - $ref: "#/components/parameters/WorkflowIdPath"
+        - $ref: "#/components/parameters/RunIdPath"
+        - name: search_attribute_keys
+          in: query
+          schema: { type: array, maxItems: 20, items: { type: string, minLength: 1, maxLength: 255 } }
+        - name: history_page_size
+          in: query
+          schema: { type: integer, minimum: 1, maximum: 1000, default: 200 }
+        - name: history_page_token
+          in: query
+          schema: { type: string, maxLength: 4096 }
+      responses:
+        "200": { $ref: "#/components/responses/ControlPlaneEnvelope" }
   /workflows/{workflowId}/debug:
     get:
       tags: [workflows]
diff --git a/static/stable-releases.json b/static/stable-releases.json
index aab13d1b27..0e0ca70d19 100644
--- a/static/stable-releases.json
+++ b/static/stable-releases.json
@@ -4,11 +4,11 @@
   "updated_at": "2026-10-06",
   "artifacts": {
     "cli": "2.2.0",
-    "sdk-php": "2.2.2",
+    "sdk-php": "2.2.3",
     "sdk-python": "2.4.0",
     "sdk-rust": "3.2.0",
-    "server": "2.5.4",
-    "waterline": "2.1.0",
-    "workflow": "2.4.4"
+    "server": "2.5.5",
+    "waterline": "2.2.0",
+    "workflow": "2.4.5"
   }
 }