diff --git a/docs/openapi-tess.yaml b/docs/openapi-tess.yaml
index 29616d8..4a3241a 100644
--- a/docs/openapi-tess.yaml
+++ b/docs/openapi-tess.yaml
@@ -118,6 +118,62 @@ paths:
           responses: { '200': { description: Recovered } },
         },
     }
+  /api/coord/mos/handoff:
+    {
+      post:
+        {
+          summary: Submit Mos handoff,
+          parameters: [{ $ref: '#/components/parameters/correlation' }],
+          responses: { '200': { description: Receipt } },
+        },
+    }
+  /api/coord/mos/{handoffId}/observe:
+    {
+      get:
+        {
+          summary: Observe Mos handoff,
+          parameters:
+            [
+              { $ref: '#/components/parameters/handoffId' },
+              { $ref: '#/components/parameters/correlation' },
+            ],
+          responses: { '200': { description: Observation } },
+        },
+    }
+  /api/coord/mos/{handoffId}/result:
+    {
+      get:
+        {
+          summary: Get Mos handoff result,
+          parameters:
+            [
+              { $ref: '#/components/parameters/handoffId' },
+              { $ref: '#/components/parameters/correlation' },
+            ],
+          responses: { '200': { description: Result } },
+        },
+    }
+  /api/interaction/{agentName}/sessions/{sessionId}/stream:
+    {
+      get:
+        {
+          summary: Stream runtime events,
+          parameters:
+            [
+              { $ref: '#/components/parameters/agentName' },
+              { $ref: '#/components/parameters/sessionId' },
+              { $ref: '#/components/parameters/correlation' },
+            ],
+          responses:
+            {
+              '200':
+                {
+                  description: Event stream,
+                  content: { text/event-stream: { schema: { type: string } } },
+                },
+            },
+        },
+    }
   /api/memory/preferences:
     {
       get: { summary: List preferences, responses: { '200': { description: Preferences } } },
diff --git a/docs/tess/M5-003-DOCUMENTATION-CHECKLIST.md b/docs/tess/M5-003-DOCUMENTATION-CHECKLIST.md
index 336900b..5622d0a 100644
--- a/docs/tess/M5-003-DOCUMENTATION-CHECKLIST.md
+++ b/docs/tess/M5-003-DOCUMENTATION-CHECKLIST.md
@@ -1,6 +1,6 @@
 # TESS-M5-003 Documentation Checklist
 
-- [x] `openapi-tess.yaml`: authenticated interaction endpoints, Mos handoff/observe/result, memory search.
+- [x] `openapi-tess.yaml`: authenticated interaction endpoints including SSE stream, Mos handoff/observe/result, and memory preferences, insights, and search.
 - [x] User guide: authorized session and handoff workflows.
 - [x] Admin guide: provisioning, policy, health, and approval boundary.
 - [x] Developer guide: scope, durable state, and provider adapter contract.