simstudioai · icecrasher321 · Mar 31, 2026 · Mar 31, 2026 · Mar 31, 2026 · Mar 31, 2026
diff --git a/...nents/panel/components/editor/components/sub-block/components/file-upload/file-upload.tsx b/...nents/panel/components/editor/components/sub-block/components/file-upload/file-upload.tsx
@@ -2,14 +2,15 @@
 
 import { useEffect, useMemo, useRef, useState } from 'react'
 import { createLogger } from '@sim/logger'
+import { useQueryClient } from '@tanstack/react-query'
 import { X } from 'lucide-react'
 import { useParams } from 'next/navigation'
 import { Button, Combobox } from '@/components/emcn/components'
 import { Progress } from '@/components/ui/progress'
 import { cn } from '@/lib/core/utils/cn'
-import type { WorkspaceFileRecord } from '@/lib/uploads/contexts/workspace'
 import { getExtensionFromMimeType } from '@/lib/uploads/utils/file-utils'
 import { useSubBlockValue } from '@/app/workspace/[workspaceId]/w/[workflowId]/components/panel/components/editor/components/sub-block/hooks/use-sub-block-value'
+import { useWorkspaceFiles, workspaceFilesKeys } from '@/hooks/queries/workspace-files'
 import { useWorkflowRegistry } from '@/stores/workflows/registry/store'
 import { useWorkflowStore } from '@/stores/workflows/workflow/store'
 
@@ -150,8 +151,6 @@ export function FileUpload({
   const [storeValue, setStoreValue] = useSubBlockValue(blockId, subBlockId)
   const [uploadingFiles, setUploadingFiles] = useState<UploadingFile[]>([])
   const [uploadProgress, setUploadProgress] = useState(0)
-  const [workspaceFiles, setWorkspaceFiles] = useState<WorkspaceFileRecord[]>([])
-  const [loadingWorkspaceFiles, setLoadingWorkspaceFiles] = useState(false)
   const [uploadError, setUploadError] = useState<string | null>(null)
   const [inputValue, setInputValue] = useState('')
 
@@ -163,25 +162,14 @@ export function FileUpload({
   const params = useParams()
   const workspaceId = params?.workspaceId as string
 
-  const value = isPreview ? previewValue : storeValue
-
-  const loadWorkspaceFiles = async () => {
-    if (!workspaceId || isPreview) return
-
-    try {
-      setLoadingWorkspaceFiles(true)
-      const response = await fetch(`/api/workspaces/${workspaceId}/files`)
-      const data = await response.json()
+  const queryClient = useQueryClient()
+  const {
+    data: workspaceFiles = [],
+    isLoading: loadingWorkspaceFiles,
+    refetch: refetchWorkspaceFiles,
+  } = useWorkspaceFiles(workspaceId)
 
-      if (data.success) {
-        setWorkspaceFiles(data.files || [])
-      }
-    } catch (error) {
-      logger.error('Error loading workspace files:', error)
-    } finally {
-      setLoadingWorkspaceFiles(false)
-    }
-  }
+  const value = isPreview ? previewValue : storeValue
 
   /**
    * Checks if a file's MIME type matches the accepted types
@@ -226,10 +214,6 @@ export function FileUpload({
     return !isAlreadySelected
   })
 
-  useEffect(() => {
-    void loadWorkspaceFiles()
-  }, [workspaceId])
-
   /**
    * Opens file dialog
    */
@@ -394,7 +378,7 @@ export function FileUpload({
         setUploadError(null)
 
         if (workspaceId) {
-          void loadWorkspaceFiles()
+          void queryClient.invalidateQueries({ queryKey: workspaceFilesKeys.lists() })
         }
 
         if (uploadedFiles.length === 1) {
@@ -726,7 +710,7 @@ export function FileUpload({
           value={inputValue}
           onChange={handleComboboxChange}
           onOpenChange={(open) => {
-            if (open) void loadWorkspaceFiles()
+            if (open) void refetchWorkspaceFiles()
           }}
           placeholder={loadingWorkspaceFiles ? 'Loading files...' : '+ Add More'}
           disabled={disabled || loadingWorkspaceFiles}
@@ -746,7 +730,7 @@ export function FileUpload({
           onInputChange={handleComboboxChange}
           onClear={(e) => handleRemoveFile(filesArray[0], e)}
           onOpenChange={(open) => {
-            if (open) void loadWorkspaceFiles()
+            if (open) void refetchWorkspaceFiles()
           }}
           disabled={disabled}
           isLoading={loadingWorkspaceFiles}
@@ -763,7 +747,7 @@ export function FileUpload({
           value={inputValue}
           onChange={handleComboboxChange}
           onOpenChange={(open) => {
-            if (open) void loadWorkspaceFiles()
+            if (open) void refetchWorkspaceFiles()
           }}
           placeholder={loadingWorkspaceFiles ? 'Loading files...' : 'Select or upload file'}
           disabled={disabled || loadingWorkspaceFiles}

diff --git a/apps/sim/blocks/blocks/file.ts b/apps/sim/blocks/blocks/file.ts
@@ -318,23 +318,26 @@ export const FileV3Block: BlockConfig<FileParserV3Output> = {
       condition: { field: 'operation', value: 'file_write' },
       mode: 'advanced',
     },
+    {
+      id: 'appendFile',
+      title: 'File',
+      type: 'file-upload' as SubBlockType,
+      canonicalParamId: 'appendFileInput',
+      acceptedTypes: '.txt,.md,.json,.csv,.xml,.html,.htm,.yaml,.yml,.log,.rtf',
+      placeholder: 'Select or upload a workspace file',
+      mode: 'basic',
+      condition: { field: 'operation', value: 'file_append' },
+      required: { field: 'operation', value: 'file_append' },
+    },
     {
       id: 'appendFileName',
       title: 'File',
-      type: 'dropdown' as SubBlockType,
-      placeholder: 'Select a workspace file...',
+      type: 'short-input' as SubBlockType,
+      canonicalParamId: 'appendFileInput',
+      placeholder: 'File name (e.g., notes.md)',
+      mode: 'advanced',
       condition: { field: 'operation', value: 'file_append' },
       required: { field: 'operation', value: 'file_append' },
-      options: [],
-      fetchOptions: async () => {
-        const { useWorkflowRegistry } = await import('@/stores/workflows/registry/store')
-        const workspaceId = useWorkflowRegistry.getState().hydration.workspaceId
-        if (!workspaceId) return []
-        const response = await fetch(`/api/workspaces/${workspaceId}/files`)
-        const data = await response.json()
-        if (!data.success || !data.files) return []
-        return data.files.map((f: { name: string }) => ({ label: f.name, id: f.name }))
-      },
     },
     {
       id: 'appendContent',
@@ -362,8 +365,26 @@ export const FileV3Block: BlockConfig<FileParserV3Output> = {
         }
 
         if (operation === 'file_append') {
+          const appendInput = params.appendFileInput
+          if (!appendInput) {
+            throw new Error('File is required for append')
+          }
+
+          let fileName: string
+          if (typeof appendInput === 'string') {
+            fileName = appendInput.trim()
+          } else {
+            const normalized = normalizeFileInput(appendInput, { single: true })
+            const file = normalized as Record<string, unknown> | null
+            fileName = (file?.name as string) ?? ''
+          }
+
+          if (!fileName) {
+            throw new Error('Could not determine file name')
+          }
+
           return {
-            fileName: params.appendFileName,
+            fileName,
             content: params.appendContent,
             workspaceId: params._context?.workspaceId,
           }
@@ -413,7 +434,7 @@ export const FileV3Block: BlockConfig<FileParserV3Output> = {
     fileName: { type: 'string', description: 'Name for a new file (write)' },
     content: { type: 'string', description: 'File content to write' },
     contentType: { type: 'string', description: 'MIME content type for write' },
-    appendFileName: { type: 'string', description: 'Name of existing file to append to' },
+    appendFileInput: { type: 'json', description: 'File to append to (canonical param)' },
     appendContent: { type: 'string', description: 'Content to append to file' },
   },
   outputs: {