feat(flow): show tool usage in flow conversations

backend/migrations/20251007123506_update_conversation_message_types.down.sql

@@ -0,0 +1,3 @@
+-- Remove step_name and success columns
+ALTER TABLE flow_conversation_message DROP COLUMN IF EXISTS step_name;
+ALTER TABLE flow_conversation_message DROP COLUMN IF EXISTS success;

backend/migrations/20251007123506_update_conversation_message_types.up.sql

@@ -0,0 +1,8 @@
+-- Add up migration script here
+
+-- Extend MESSAGE_TYPE enum to include 'tool'
+ALTER TYPE MESSAGE_TYPE ADD VALUE 'tool';
+
+-- Add step_name and success columns to flow_conversation_message table
+ALTER TABLE flow_conversation_message ADD COLUMN step_name VARCHAR(255);
+ALTER TABLE flow_conversation_message ADD COLUMN success BOOLEAN DEFAULT TRUE NOT NULL;

backend/windmill-api/openapi.yaml

@@ -6529,15 +6529,22 @@ paths:
         - flow_conversation
       parameters:
         - $ref: "#/components/parameters/WorkspaceId"
+        - $ref: "#/components/parameters/Page"
+        - $ref: "#/components/parameters/PerPage"
         - name: conversation_id
           description: conversation id
           in: path
           required: true
           schema:
             type: string
             format: uuid
-        - $ref: "#/components/parameters/Page"
-        - $ref: "#/components/parameters/PerPage"
+        - name: after_id
+          description: id to fetch only the messages after that id
+          in: query
+          required: false
+          schema:
+            type: string
+            format: uuid
       responses:
         "200":
           description: conversation messages
@@ -14805,7 +14812,7 @@ components:
           description: The conversation this message belongs to
         message_type:
           type: string
-          enum: [user, assistant, system]
+          enum: [user, assistant, system, tool]
           description: Type of the message
         content:
           type: string
@@ -14819,6 +14826,12 @@ components:
           type: string
           format: date-time
           description: When the message was created
+        step_name:
+          type: string
+          description: The step name that produced that message
+        success:
+          type: boolean
+          description: Whether the message is a success
 
     EndpointTool:
       type: object
@@ -17332,7 +17345,7 @@ components:
         - OK
         - SKIP
         - FAIL
-    
+
     DucklakeInstanceCatalogDbStatusLogs:
       type: object
       properties:
@@ -17368,7 +17381,6 @@ components:
           description: Error message if the operation failed
           example: "Connection timeout"
 
-
     NewSqsTrigger:
       type: object
       properties: