diff --git a/deps/db-sync/scripts/start-weather-session.sh b/deps/db-sync/scripts/start-weather-session.sh
index a15995449c..356949eb01 100755
--- a/deps/db-sync/scripts/start-weather-session.sh
+++ b/deps/db-sync/scripts/start-weather-session.sh
@@ -3,34 +3,20 @@ set -euo pipefail
 
 BASE_URL="${BASE_URL:-http://127.0.0.1:8787}"
 TOKEN="${TOKEN:-dev-token}"
-SESSION_ID="${SESSION_ID:-weather}"
+SESSION_ID="${SESSION_ID:-p2}"
 
 create_payload() {
   cat <<JSON
 {
-  "id": "${SESSION_ID}",
-  "source": {
-    "node-id": "task-node-1",
-    "node-title": "Check weather in Hangzhou",
-    "node-revision": "2026-02-02T00:00:00Z",
-    "snapshot": {
-      "content": "#Task tell me the weather today in Hangzhou",
-      "references": [],
-      "attachments": []
-    }
-  },
-  "intent": {
-    "title": "Weather query",
-    "summary": "Ask codex for weather in Hangzhou today"
-  },
+  "session-id": "${SESSION_ID}",
+  "node-id": "task-node-1",
+  "node-title": "Check weather in Hangzhou",
+  "content": "Tell me the weather today in Hangzhou.",
+  "attachments": [],
   "agent": {
     "provider": "codex",
     "mode": "build",
     "permission-mode": "default"
-  },
-  "audit": {
-    "requested-at": 1769980800000,
-    "priority": "normal"
   }
 }
 JSON
diff --git a/deps/db-sync/src/logseq/db_sync/malli_schema.cljs b/deps/db-sync/src/logseq/db_sync/malli_schema.cljs
index 7dfa94256e..a8131b9d69 100644
--- a/deps/db-sync/src/logseq/db_sync/malli_schema.cljs
+++ b/deps/db-sync/src/logseq/db_sync/malli_schema.cljs
@@ -217,22 +217,14 @@
    :any
    http-error-response-schema])
 
-(def agent-task-source-schema
+(def sessions-create-request-schema
   [:map
+   [:session-id :string]
    [:node-id :string]
    [:node-title :string]
-   [:node-revision :any]
-   [:snapshot {:optional true} :any]])
-
-(def agent-task-schema
-  [:map
-   [:id :string]
-   [:source agent-task-source-schema]
-   [:intent {:optional true} :map]
-   [:agent {:optional true} [:or :string :map]]
-   [:audit {:optional true} :map]])
-
-(def sessions-create-request-schema agent-task-schema)
+   [:content :string]
+   [:attachments [:sequential :string]]
+   [:agent [:or :string :map]]])
 
 (def sessions-message-request-schema
   [:map
diff --git a/deps/db-sync/src/logseq/db_sync/worker/agent/request.cljs b/deps/db-sync/src/logseq/db_sync/worker/agent/request.cljs
new file mode 100644
index 0000000000..bc4a7e665d
--- /dev/null
+++ b/deps/db-sync/src/logseq/db_sync/worker/agent/request.cljs
@@ -0,0 +1,13 @@
+(ns logseq.db-sync.worker.agent.request)
+
+(defn normalize-session-create
+  [body]
+  (when (map? body)
+    (let [attachments (:attachments body)
+          attachments (when (sequential? attachments) (vec attachments))]
+      (cond-> {:id (:session-id body)
+               :source {:node-id (:node-id body)
+                        :node-title (:node-title body)}
+               :intent {:content (:content body)}
+               :agent (:agent body)}
+        (some? attachments) (assoc-in [:intent :attachments] attachments)))))
diff --git a/deps/db-sync/src/logseq/db_sync/worker/agent/runtime_provider.cljs b/deps/db-sync/src/logseq/db_sync/worker/agent/runtime_provider.cljs
index f99980d685..1552af985c 100644
--- a/deps/db-sync/src/logseq/db_sync/worker/agent/runtime_provider.cljs
+++ b/deps/db-sync/src/logseq/db_sync/worker/agent/runtime_provider.cljs
@@ -24,6 +24,22 @@
 (defn- strip-trailing-slash [s]
   (string/replace (or s "") #"/+$" ""))
 
+(defn- normalize-provider [value]
+  (when (string? value)
+    (let [normalized (-> value string/trim string/lower-case)]
+      (when-not (string/blank? normalized) normalized))))
+
+(defn provider-kind [^js env]
+  (or (normalize-provider (env-str env "AGENT_RUNTIME_PROVIDER"))
+      "sprites"))
+
+(defn runtime-provider-kind [^js env runtime]
+  (or (normalize-provider (:provider runtime))
+      (provider-kind env)))
+
+(defn fill-template [template sandbox-id]
+  (string/replace (or template "") "{sandbox_id}" (or sandbox-id "")))
+
 (defn- sanitize-name [name]
   (let [name (or name "task")
         sanitized (-> name
diff --git a/deps/db-sync/src/logseq/db_sync/worker/handler/agent.cljs b/deps/db-sync/src/logseq/db_sync/worker/handler/agent.cljs
index ebb944923b..ec8eecb04b 100644
--- a/deps/db-sync/src/logseq/db_sync/worker/handler/agent.cljs
+++ b/deps/db-sync/src/logseq/db_sync/worker/handler/agent.cljs
@@ -2,6 +2,7 @@
   (:require [lambdaisland.glogi :as log]
             [logseq.db-sync.common :as common]
             [logseq.db-sync.platform.core :as platform]
+            [logseq.db-sync.worker.agent.request :as agent-request]
             [logseq.db-sync.worker.auth :as auth]
             [logseq.db-sync.worker.http :as http]
             [logseq.db-sync.worker.routes.index :as routes]
@@ -48,8 +49,7 @@
              (http/bad-request "missing body")
              (let [body (js->clj result :keywordize-keys true)
                    body (http/coerce-http-request :sessions/create body)
-                   idempotency-key (.get (.-headers request) "idempotency-key")
-                   session-id (or (:id body) idempotency-key)]
+                   session-id (:session-id body)]
                (cond
                  (nil? body)
                  (http/bad-request "invalid body")
@@ -61,7 +61,7 @@
                  (if-let [^js stub (session-stub env session-id)]
                    (let [headers (base-headers request claims)
                          _ (.set headers "x-stream-base" (.-origin url))
-                         task (assoc body :id session-id)
+                         task (agent-request/normalize-session-create body)
                          body-json (js/JSON.stringify (clj->js task))
                          do-url (str (.-origin url) "/__session__/init")]
                      (forward-request stub do-url "POST" headers body-json))
diff --git a/deps/db-sync/test/logseq/db_sync/agent_request_test.cljs b/deps/db-sync/test/logseq/db_sync/agent_request_test.cljs
new file mode 100644
index 0000000000..def727fccc
--- /dev/null
+++ b/deps/db-sync/test/logseq/db_sync/agent_request_test.cljs
@@ -0,0 +1,35 @@
+(ns logseq.db-sync.agent-request-test
+  (:require [cljs.test :refer [deftest is testing]]
+            [logseq.db-sync.worker.agent.request :as request]
+            [logseq.db-sync.worker.http :as http]))
+
+(deftest sessions-create-coerce-test
+  (testing "accepts simplified sessions/create request"
+    (let [body {:session-id "sess-1"
+                :node-id "node-1"
+                :node-title "Title"
+                :content "Hello"
+                :attachments ["https://example.com/a.png"]
+                :agent "codex"}
+          coerced (http/coerce-http-request :sessions/create body)]
+      (is (= body coerced))))
+  (testing "rejects missing required fields"
+    (is (nil? (http/coerce-http-request :sessions/create {:session-id "sess-1"})))))
+
+(deftest normalize-session-create-test
+  (testing "normalizes simplified request into agent task"
+    (let [body {:session-id "sess-1"
+                :node-id "node-1"
+                :node-title "Title"
+                :content "Hello"
+                :attachments ["https://example.com/a.png" "https://example.com/b.png"]
+                :agent {:provider "codex"}}
+          normalized (request/normalize-session-create body)]
+      (is (= {:id "sess-1"
+              :source {:node-id "node-1"
+                       :node-title "Title"}
+              :intent {:content "Hello"
+                       :attachments ["https://example.com/a.png"
+                                     "https://example.com/b.png"]}
+              :agent {:provider "codex"}}
+             normalized)))))
diff --git a/deps/db-sync/test/logseq/db_sync/test_runner.cljs b/deps/db-sync/test/logseq/db_sync/test_runner.cljs
index 3bff7d2e99..36c7cc40d0 100644
--- a/deps/db-sync/test/logseq/db_sync/test_runner.cljs
+++ b/deps/db-sync/test/logseq/db_sync/test_runner.cljs
@@ -1,5 +1,6 @@
 (ns logseq.db-sync.test-runner
   (:require [cljs.test :as ct]
+            [logseq.db-sync.agent-request-test]
             [logseq.db-sync.agent-runtime-provider-test]
             [logseq.db-sync.node-config-test]
             [logseq.db-sync.platform-test]