diff --git a/models_gen.go b/models_gen.go
index 1d36a16..a821ac7 100644
--- a/models_gen.go
+++ b/models_gen.go
@@ -5763,6 +5763,8 @@ type InvestigationTarget struct {
 	Dashboard DashboardInvestigationTarget `json:"dashboard,omitzero" toon:"dashboard,omitempty"`
 	// Entry kind: `dashboard` opens a dashboard panel, `query` opens an Explore query. It decides whether `dashboard` or `query` must be supplied; supplying the other one is rejected.
 	Kind string `json:"kind" toon:"kind"`
+	// One-sentence plain text explaining what this entry helps confirm during investigation. Literal text, not a template, and not part of the alert identity. At most 512 bytes; control characters are rejected.
+	Purpose string `json:"purpose,omitempty" toon:"purpose,omitempty"`
 	// Configuration for the `query` kind; required when `kind` is `query`, and rejected when `kind` is `dashboard`.
 	Query QueryInvestigationTarget `json:"query,omitzero" toon:"query,omitempty"`
 	// Window around the event time, required on every saved entry. A zero-length window is rejected; defaults belong to the editor.
@@ -7793,8 +7795,8 @@ type QueryFramesResult struct {
 
 // QueryInvestigationTarget is generated from the Flashduty OpenAPI schema.
 type QueryInvestigationTarget struct {
-	// Data source the query runs against.
-	DatasourceID int64 `json:"datasource_id" toon:"datasource_id"`
+	// Data source the query runs against. Omit (or set 0) to run on the alert event's own datasource.
+	DatasourceID int64 `json:"datasource_id,omitempty" toon:"datasource_id,omitempty"`
 	// Query payload.
 	Query DashboardQuery `json:"query" toon:"query"`
 }
diff --git a/openapi/openapi.en.json b/openapi/openapi.en.json
index d7d57a3..bab6114 100644
--- a/openapi/openapi.en.json
+++ b/openapi/openapi.en.json
@@ -29229,6 +29229,11 @@
             ],
             "description": "Entry kind: `dashboard` opens a dashboard panel, `query` opens an Explore query. It decides whether `dashboard` or `query` must be supplied; supplying the other one is rejected."
           },
+          "purpose": {
+            "type": "string",
+            "maxLength": 512,
+            "description": "One-sentence plain text explaining what this entry helps confirm during investigation. Literal text, not a template, and not part of the alert identity. At most 512 bytes; control characters are rejected."
+          },
           "time_range": {
             "$ref": "#/components/schemas/InvestigationTimeRange",
             "description": "Window around the event time, required on every saved entry. A zero-length window is rejected; defaults belong to the editor."
@@ -29303,9 +29308,9 @@
           "datasource_id": {
             "type": "integer",
             "format": "int64",
-            "minimum": 1,
+            "minimum": 0,
             "maximum": 9007199254740991,
-            "description": "Data source the query runs against."
+            "description": "Data source the query runs against. Omit (or set 0) to run on the alert event's own datasource."
           },
           "query": {
             "$ref": "#/components/schemas/DashboardQuery",
@@ -29313,7 +29318,6 @@
           }
         },
         "required": [
-          "datasource_id",
           "query"
         ]
       },
diff --git a/openapi/openapi.zh.json b/openapi/openapi.zh.json
index 171481a..bbbf579 100644
--- a/openapi/openapi.zh.json
+++ b/openapi/openapi.zh.json
@@ -29229,6 +29229,11 @@
             ],
             "description": "入口类型：`dashboard` 打开仪表盘面板，`query` 打开 Explore 查询。它决定必须提供 `dashboard` 还是 `query`，提供另一个会被拒绝。"
           },
+          "purpose": {
+            "type": "string",
+            "maxLength": 512,
+            "description": "一句话纯文本，说明该入口帮助确认什么排查意图。不是模板，也不参与告警身份计算。不超过 512 字节；不允许包含控制字符。"
+          },
           "time_range": {
             "$ref": "#/components/schemas/InvestigationTimeRange",
             "description": "事件时间前后的取数窗口，每个已保存的入口都必填。长度为 0 的窗口会被拒绝；默认值由前端编辑器提供。"
@@ -29303,9 +29308,9 @@
           "datasource_id": {
             "type": "integer",
             "format": "int64",
-            "minimum": 1,
+            "minimum": 0,
             "maximum": 9007199254740991,
-            "description": "查询所用的数据源。"
+            "description": "查询所用的数据源。省略（或填 0）表示使用告警事件自身的数据源。"
           },
           "query": {
             "$ref": "#/components/schemas/DashboardQuery",
@@ -29313,7 +29318,6 @@
           }
         },
         "required": [
-          "datasource_id",
           "query"
         ]
       },