feat: Ability to change workflow trigger

apps/api/src/services/WorkflowService.ts

@@ -194,6 +194,8 @@ export class WorkflowService {
       }
     }
 
+    // Use transaction to update workflow and TRIGGER step atomically
+    const updated = await prisma.$transaction(async tx => {
       const updateData: Prisma.WorkflowUpdateInput = {};
 
       if (data.name !== undefined) updateData.name = data.name;
@@ -205,7 +207,7 @@ export class WorkflowService {
       if (data.enabled !== undefined) updateData.enabled = data.enabled;
       if (data.allowReentry !== undefined) updateData.allowReentry = data.allowReentry;
 
-    const updated = await prisma.workflow.update({
+      const updatedWorkflow = await tx.workflow.update({
         where: {id: workflowId},
         data: updateData,
         include: {
@@ -215,11 +217,46 @@ export class WorkflowService {
         },
       });
 
+      // If triggerConfig changed and it's an EVENT trigger, update the TRIGGER step
+      if (data.triggerConfig !== undefined && updatedWorkflow.triggerType === 'EVENT') {
+        const newTriggerConfig = data.triggerConfig as {eventName?: string} | null;
+        const eventName = newTriggerConfig?.eventName;
+
+        if (eventName) {
+          // Find the TRIGGER step
+          const triggerStep = await tx.workflowStep.findFirst({
+            where: {
+              workflowId: workflowId,
+              type: 'TRIGGER',
+            },
+          });
+
+          if (triggerStep) {
+            // Update TRIGGER step config and name to match
+            await tx.workflowStep.update({
+              where: {id: triggerStep.id},
+              data: {
+                name: `Trigger: ${eventName}`,
+                config: {eventName},
+              },
+            });
+          }
+        }
+      }
+
+      return updatedWorkflow;
+    });
+
     // Invalidate workflow cache if enabled status changed or workflow is enabled
     if (data.enabled !== undefined || updated.enabled) {
       await EventService.invalidateWorkflowCache(projectId);
     }
 
+    // Also invalidate cache if triggerConfig changed on an enabled workflow
+    if (data.triggerConfig !== undefined && updated.enabled) {
+      await EventService.invalidateWorkflowCache(projectId);
+    }
+
     // Send notification if enabled status changed
     if (data.enabled !== undefined && data.enabled !== workflow.enabled) {
       if (data.enabled) {

apps/web/src/components/WorkflowBuilder.tsx

@@ -226,6 +226,22 @@ function CustomNode({
         onMouseLeave={() => setShowActions(false)}
       >
         {/* Action buttons - shown on hover */}
+        {showActions && data.type === 'TRIGGER' && (
+          <div className="absolute -top-3 -right-3 flex gap-1.5 z-10">
+            <Button
+              onClick={e => {
+                e.stopPropagation();
+                data.onEdit?.();
+              }}
+              variant="outline"
+              size="icon"
+              className="h-7 w-7 shadow-md"
+              title="Edit trigger settings"
+            >
+              <Settings className="h-3.5 w-3.5" />
+            </Button>
+          </div>
+        )}
         {showActions && data.type !== 'TRIGGER' && (
           <div className="absolute -top-3 -right-3 flex gap-1.5 z-10">
             <Button
@@ -322,6 +338,14 @@ function CustomNode({
             </div>
           </div>
         )}
+        {data.type === 'TRIGGER' && data.config?.eventName && (
+          <div className="mt-3 pt-3 border-t border-neutral-100">
+            <div className="flex items-center gap-2 text-xs text-neutral-600">
+              <Lightbulb className="h-3 w-3" />
+              <span className="truncate">{data.config.eventName}</span>
+            </div>
+          </div>
+        )}
         {data.type === 'WEBHOOK' && data.config?.url && (
           <div className="mt-3 pt-3 border-t border-neutral-100">
             <div className="flex items-center gap-2 text-xs text-neutral-600">
@@ -375,11 +399,23 @@ export function WorkflowBuilder({workflowId, steps, onUpdate}: WorkflowBuilderPr
   const [stepToDelete, setStepToDelete] = useState<string | null>(null);
 
   // Define handlers before they are used in useMemo
-  const handleEditStep = useCallback((stepId: string) => {
+  const handleEditStep = useCallback(
-    // This will be handled by the parent component
+    (stepId: string) => {
+      // Check if this is a TRIGGER step
+      const step = steps.find(s => s.id === stepId);
+
+      if (step?.type === 'TRIGGER') {
+        // For TRIGGER steps, open workflow settings instead
+        const event = new CustomEvent('workflow-open-settings');
+        window.dispatchEvent(event);
+      } else {
+        // For other steps, open step editor
         const event = new CustomEvent('workflow-edit-step', {detail: {stepId}});
         window.dispatchEvent(event);
-  }, []);
+      }
+    },
+    [steps],
+  );
 
   const handleDeleteStepClick = useCallback((stepId: string) => {
     setStepToDelete(stepId);

apps/web/src/pages/workflows/[id].tsx

@@ -318,7 +318,12 @@ export default function WorkflowEditorPage() {
     }
   };
 
-  const handleUpdateSettings = async (data: {name: string; description?: string}) => {
+  const handleUpdateSettings = async (data: {
+    name: string;
+    description?: string;
+    allowReentry?: boolean;
+    triggerConfig?: {eventName: string};
+  }) => {
     try {
       await network.fetch<Workflow, typeof WorkflowSchemas.update>('PATCH', `/workflows/${id}`, data);
       toast.success('Workflow updated successfully');
@@ -352,9 +357,15 @@ export default function WorkflowEditorPage() {
       }
     };
 
+    const handleOpenSettingsEvent = () => {
+      setShowSettingsDialog(true);
+    };
+
     window.addEventListener('workflow-edit-step', handleEditStepEvent);
+    window.addEventListener('workflow-open-settings', handleOpenSettingsEvent);
     return () => {
       window.removeEventListener('workflow-edit-step', handleEditStepEvent);
+      window.removeEventListener('workflow-open-settings', handleOpenSettingsEvent);
     };
   }, [workflow]);
 
@@ -741,21 +752,49 @@ interface SettingsDialogProps {
   workflow: Workflow;
   open: boolean;
   onOpenChange: (open: boolean) => void;
-  onSave: (data: {name: string; description?: string; allowReentry?: boolean}) => Promise<void>;
+  onSave: (data: {
+    name: string;
+    description?: string;
+    allowReentry?: boolean;
+    triggerConfig?: {eventName: string};
+  }) => Promise<void>;
 }
 
 function SettingsDialog({workflow, open, onOpenChange, onSave}: SettingsDialogProps) {
+  const triggerConfig = workflow.triggerConfig as {eventName?: string} | null;
   const [name, setName] = useState(workflow.name);
   const [description, setDescription] = useState(workflow.description ?? '');
   const [allowReentry, setAllowReentry] = useState(workflow.allowReentry ?? false);
+  const [eventName, setEventName] = useState(triggerConfig?.eventName ?? '');
   const [isSubmitting, setIsSubmitting] = useState(false);
 
+  // Sync state when workflow changes or dialog opens
+  useEffect(() => {
+    if (open) {
+      setName(workflow.name);
+      setDescription(workflow.description ?? '');
+      setAllowReentry(workflow.allowReentry ?? false);
+      const config = workflow.triggerConfig as {eventName?: string} | null;
+      setEventName(config?.eventName ?? '');
+    }
+  }, [open, workflow]);
+
+  // Fetch available event names
+  const {data: eventNamesData} = useSWR<{eventNames: string[]}>(open ? '/events/names' : null, {
+    revalidateOnFocus: false,
+  });
+
   const handleSubmit = async (e: React.FormEvent) => {
     e.preventDefault();
     setIsSubmitting(true);
 
     try {
-      await onSave({name, description: description || undefined, allowReentry});
+      await onSave({
+        name,
+        description: description || undefined,
+        allowReentry,
+        triggerConfig: eventName.trim() ? {eventName: eventName.trim()} : undefined,
+      });
     } finally {
       setIsSubmitting(false);
     }
@@ -784,6 +823,36 @@ function SettingsDialog({workflow, open, onOpenChange, onSave}: SettingsDialogPr
             />
           </div>
 
+          <div>
+            <Label htmlFor="eventName">Trigger Event *</Label>
+            {eventNamesData?.eventNames && eventNamesData.eventNames.length > 0 ? (
+              <Select value={eventName} onValueChange={setEventName} required>
+                <SelectTrigger id="eventName">
+                  <SelectValue placeholder="Select an event" />
+                </SelectTrigger>
+                <SelectContent>
+                  {eventNamesData.eventNames.map(name => (
+                    <SelectItem key={name} value={name}>
+                      {name}
+                    </SelectItem>
+                  ))}
+                </SelectContent>
+              </Select>
+            ) : (
+              <Input
+                id="eventName"
+                type="text"
+                value={eventName}
+                onChange={e => setEventName(e.target.value)}
+                placeholder="e.g., contact.created, email.opened"
+                required
+              />
+            )}
+            <p className="text-xs text-neutral-500 mt-1">
+              The event that triggers this workflow to start for a contact
+            </p>
+          </div>
+
           <div className="flex items-start gap-3 p-4 bg-neutral-50 rounded-lg border border-neutral-200">
             <Switch id="allowReentry" checked={allowReentry} onCheckedChange={setAllowReentry} />
             <div className="flex-1">

packages/shared/src/schemas/index.ts

@@ -180,6 +180,7 @@ export const WorkflowSchemas = {
     triggerType: z.nativeEnum(WorkflowTriggerType).optional(),
     triggerConfig: jsonSchema.optional(),
     enabled: z.boolean().optional(),
+    allowReentry: z.boolean().optional(),
   }),
   addStep: z.object({
     type: z.nativeEnum(WorkflowStepType),