fix(executor): resolve block ID for parallel subflow active state

* refactor(tool-input): replace bidirectional effects with zustand subscription

* added wand for custom cron, fixed slack inconsistency

* fix slack

apps/docs/content/docs/en/tools/google_books.mdx

@@ -7,7 +7,7 @@ import { BlockInfoCard } from "@/components/ui/block-info-card"
 
 <BlockInfoCard 
   type="google_books"
-  color="#FFFFFF"
+  color="#E0E0E0"
 />
 
 ## Usage Instructions

apps/docs/content/docs/en/tools/s3.mdx

@@ -71,6 +71,7 @@ Retrieve an object from an AWS S3 bucket
 | --------- | ---- | -------- | ----------- |
 | `accessKeyId` | string | Yes | Your AWS Access Key ID |
 | `secretAccessKey` | string | Yes | Your AWS Secret Access Key |
+| `region` | string | No | Optional region override when URL does not include region \(e.g., us-east-1, eu-west-1\) |
 | `s3Uri` | string | Yes | S3 Object URL \(e.g., https://bucket.s3.region.amazonaws.com/path/to/file\) |
 
 #### Output

apps/docs/content/docs/en/tools/slack.mdx

@@ -79,7 +79,7 @@ Send messages to Slack channels or direct messages. Supports Slack mrkdwn format
 | `channel` | string | No | Slack channel ID \(e.g., C1234567890\) |
 | `dmUserId` | string | No | Slack user ID for direct messages \(e.g., U1234567890\) |
 | `text` | string | Yes | Message text to send \(supports Slack mrkdwn formatting\) |
-| `thread_ts` | string | No | Thread timestamp to reply to \(creates thread reply\) |
+| `threadTs` | string | No | Thread timestamp to reply to \(creates thread reply\) |
 | `files` | file[] | No | Files to attach to the message |
 
 #### Output

apps/sim/app/api/wand/route.ts

@@ -238,6 +238,11 @@ Use this context to calculate relative dates like "yesterday", "last week", "beg
       finalSystemPrompt += currentTimeContext
     }
 
+    if (generationType === 'cron-expression') {
+      finalSystemPrompt +=
+        '\n\nIMPORTANT: Return ONLY the raw cron expression (e.g., "0 9 * * 1-5"). Do NOT wrap it in markdown code blocks, backticks, or quotes. Do NOT include any explanation or text before or after the expression.'
+    }
+
     if (generationType === 'json-object') {
       finalSystemPrompt +=
         '\n\nIMPORTANT: Return ONLY the raw JSON object. Do NOT wrap it in markdown code blocks (no ```json or ```). Do NOT include any explanation or text before or after the JSON. The response must start with { and end with }.'

apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/panel/components/editor/components/sub-block/components/tool-input/components/tools/sub-block-renderer.tsx

@@ -1,9 +1,10 @@
 'use client'
 
 import { useEffect, useRef } from 'react'
-import { useSubBlockValue } from '@/app/workspace/[workspaceId]/w/[workflowId]/components/panel/components/editor/components/sub-block/hooks/use-sub-block-value'
 import { SubBlock } from '@/app/workspace/[workspaceId]/w/[workflowId]/components/panel/components/editor/components/sub-block/sub-block'
 import type { SubBlockConfig as BlockSubBlockConfig } from '@/blocks/types'
+import { useWorkflowRegistry } from '@/stores/workflows/registry/store'
+import { useSubBlockStore } from '@/stores/workflows/subblock/store'
 
 interface ToolSubBlockRendererProps {
   blockId: string
@@ -44,53 +45,43 @@ export function ToolSubBlockRenderer({
   canonicalToggle,
 }: ToolSubBlockRendererProps) {
   const syntheticId = `${subBlockId}-tool-${toolIndex}-${effectiveParamId}`
-  const [storeValue, setStoreValue] = useSubBlockValue(blockId, syntheticId)
-
   const toolParamValue = toolParams?.[effectiveParamId] ?? ''
   const isObjectType = OBJECT_SUBBLOCK_TYPES.has(subBlock.type)
 
-  const lastPushedToStoreRef = useRef<string | null>(null)
-  const lastPushedToParamsRef = useRef<string | null>(null)
+  const syncedRef = useRef<string | null>(null)
+  const onParamChangeRef = useRef(onParamChange)
+  onParamChangeRef.current = onParamChange
 
   useEffect(() => {
-    if (!toolParamValue && lastPushedToStoreRef.current === null) {
-      lastPushedToStoreRef.current = toolParamValue
-      lastPushedToParamsRef.current = toolParamValue
-      return
-    }
-    if (toolParamValue !== lastPushedToStoreRef.current) {
-      lastPushedToStoreRef.current = toolParamValue
-      lastPushedToParamsRef.current = toolParamValue
+    const unsub = useSubBlockStore.subscribe((state, prevState) => {
+      const wfId = useWorkflowRegistry.getState().activeWorkflowId
+      if (!wfId) return
+      const newVal = state.workflowValues[wfId]?.[blockId]?.[syntheticId]
+      const oldVal = prevState.workflowValues[wfId]?.[blockId]?.[syntheticId]
+      if (newVal === oldVal) return
+      const stringified =
+        newVal == null ? '' : typeof newVal === 'string' ? newVal : JSON.stringify(newVal)
+      if (stringified === syncedRef.current) return
+      syncedRef.current = stringified
+      onParamChangeRef.current(toolIndex, effectiveParamId, stringified)
+    })
+    return unsub
+  }, [blockId, syntheticId, toolIndex, effectiveParamId])
 
-      if (isObjectType && typeof toolParamValue === 'string' && toolParamValue) {
-        try {
-          const parsed = JSON.parse(toolParamValue)
-          if (typeof parsed === 'object' && parsed !== null) {
-            setStoreValue(parsed)
-            return
-          }
-        } catch {
-          // Not valid JSON — fall through to set as string
+  useEffect(() => {
+    if (toolParamValue === syncedRef.current) return
+    syncedRef.current = toolParamValue
+    if (isObjectType && toolParamValue) {
+      try {
+        const parsed = JSON.parse(toolParamValue)
+        if (typeof parsed === 'object' && parsed !== null) {
+          useSubBlockStore.getState().setValue(blockId, syntheticId, parsed)
+          return
         }
-      }
-      setStoreValue(toolParamValue)
+      } catch {}
     }
-  }, [toolParamValue, setStoreValue, isObjectType])
-
-  useEffect(() => {
-    if (storeValue == null && lastPushedToParamsRef.current === null) return
-    const stringValue =
-      storeValue == null
-        ? ''
-        : typeof storeValue === 'string'
-          ? storeValue
-          : JSON.stringify(storeValue)
-    if (stringValue !== lastPushedToParamsRef.current) {
-      lastPushedToParamsRef.current = stringValue
-      lastPushedToStoreRef.current = stringValue
-      onParamChange(toolIndex, effectiveParamId, stringValue)
-    }
-  }, [storeValue, toolIndex, effectiveParamId, onParamChange])
+    useSubBlockStore.getState().setValue(blockId, syntheticId, toolParamValue)
+  }, [toolParamValue, blockId, syntheticId, isObjectType])
 
   const visibility = subBlock.paramVisibility ?? 'user-or-llm'
   const isOptionalForUser = visibility !== 'user-only'

apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/panel/components/editor/components/sub-block/components/tool-input/tool-input.tsx

@@ -1741,36 +1741,97 @@ export const ToolInput = memo(function ToolInput({
                     ) : null
                   })()}
 
-                  {requiresOAuth && oauthConfig && (
-                    <div className='relative min-w-0 space-y-[6px]'>
-                      <div className='font-medium text-[13px] text-[var(--text-primary)]'>
-                        Account <span className='ml-0.5'>*</span>
-                      </div>
-                      <div className='w-full min-w-0'>
-                        <ToolCredentialSelector
-                          value={tool.params?.credential || ''}
-                          onChange={(value: string) =>
-                            handleParamChange(toolIndex, 'credential', value)
-                          }
-                          provider={oauthConfig.provider as OAuthProvider}
-                          requiredScopes={
-                            toolBlock?.subBlocks?.find((sb) => sb.id === 'credential')
-                              ?.requiredScopes ||
-                            getCanonicalScopesForProvider(oauthConfig.provider)
-                          }
-                          serviceId={oauthConfig.provider}
-                          disabled={disabled}
-                        />
-                      </div>
-                    </div>
-                  )}
-
                   {(() => {
                     const renderedElements: React.ReactNode[] = []
 
+                    const showOAuth =
+                      requiresOAuth && oauthConfig && tool.params?.authMethod !== 'bot_token'
+
+                    const renderOAuthAccount = (): React.ReactNode => {
+                      if (!showOAuth || !oauthConfig) return null
+                      const credentialSubBlock = toolBlock?.subBlocks?.find(
+                        (s) => s.type === 'oauth-input'
+                      )
+                      return (
+                        <div key='oauth-account' className='relative min-w-0 space-y-[6px]'>
+                          <div className='font-medium text-[13px] text-[var(--text-primary)]'>
+                            {credentialSubBlock?.title || 'Account'}{' '}
+                            <span className='ml-0.5'>*</span>
+                          </div>
+                          <div className='w-full min-w-0'>
+                            <ToolCredentialSelector
+                              value={tool.params?.credential || ''}
+                              onChange={(value: string) =>
+                                handleParamChange(toolIndex, 'credential', value)
+                              }
+                              provider={oauthConfig.provider as OAuthProvider}
+                              requiredScopes={
+                                credentialSubBlock?.requiredScopes ||
+                                getCanonicalScopesForProvider(oauthConfig.provider)
+                              }
+                              serviceId={oauthConfig.provider}
+                              disabled={disabled}
+                            />
+                          </div>
+                        </div>
+                      )
+                    }
+
+                    const renderSubBlock = (sb: BlockSubBlockConfig): React.ReactNode => {
+                      const effectiveParamId = sb.id
+                      const canonicalId = toolCanonicalIndex?.canonicalIdBySubBlockId[sb.id]
+                      const canonicalGroup = canonicalId
+                        ? toolCanonicalIndex?.groupsById[canonicalId]
+                        : undefined
+                      const hasCanonicalPair = isCanonicalPair(canonicalGroup)
+                      const canonicalMode =
+                        canonicalGroup && hasCanonicalPair
+                          ? resolveCanonicalMode(
+                              canonicalGroup,
+                              { operation: tool.operation, ...tool.params },
+                              toolScopedOverrides
+                            )
+                          : undefined
+
+                      const canonicalToggleProp =
+                        hasCanonicalPair && canonicalMode && canonicalId
+                          ? {
+                              mode: canonicalMode,
+                              onToggle: () => {
+                                const nextMode = canonicalMode === 'advanced' ? 'basic' : 'advanced'
+                                collaborativeSetBlockCanonicalMode(
+                                  blockId,
+                                  `${tool.type}:${canonicalId}`,
+                                  nextMode
+                                )
+                              },
+                            }
+                          : undefined
+
+                      const sbWithTitle = sb.title
+                        ? sb
+                        : { ...sb, title: formatParameterLabel(effectiveParamId) }
+
+                      return (
+                        <ToolSubBlockRenderer
+                          key={sb.id}
+                          blockId={blockId}
+                          subBlockId={subBlockId}
+                          toolIndex={toolIndex}
+                          subBlock={sbWithTitle}
+                          effectiveParamId={effectiveParamId}
+                          toolParams={tool.params}
+                          onParamChange={handleParamChange}
+                          disabled={disabled}
+                          canonicalToggle={canonicalToggleProp}
+                        />
+                      )
+                    }
+
                     if (useSubBlocks && displaySubBlocks.length > 0) {
+                      const allBlockSubBlocks = toolBlock?.subBlocks || []
                       const coveredParamIds = new Set(
-                        displaySubBlocks.flatMap((sb) => {
+                        allBlockSubBlocks.flatMap((sb) => {
                           const ids = [sb.id]
                           if (sb.canonicalParamId) ids.push(sb.canonicalParamId)
                           const cId = toolCanonicalIndex?.canonicalIdBySubBlockId[sb.id]
@@ -1785,57 +1846,45 @@ export const ToolInput = memo(function ToolInput({
                         })
                       )
 
-                      displaySubBlocks.forEach((sb) => {
-                        const effectiveParamId = sb.id
-                        const canonicalId = toolCanonicalIndex?.canonicalIdBySubBlockId[sb.id]
-                        const canonicalGroup = canonicalId
-                          ? toolCanonicalIndex?.groupsById[canonicalId]
-                          : undefined
-                        const hasCanonicalPair = isCanonicalPair(canonicalGroup)
-                        const canonicalMode =
-                          canonicalGroup && hasCanonicalPair
-                            ? resolveCanonicalMode(
-                                canonicalGroup,
-                                { operation: tool.operation, ...tool.params },
-                                toolScopedOverrides
-                              )
-                            : undefined
+                      type RenderItem =
+                        | { kind: 'subblock'; sb: BlockSubBlockConfig }
+                        | { kind: 'oauth' }
 
-                        const canonicalToggleProp =
-                          hasCanonicalPair && canonicalMode && canonicalId
-                            ? {
-                                mode: canonicalMode,
-                                onToggle: () => {
-                                  const nextMode =
-                                    canonicalMode === 'advanced' ? 'basic' : 'advanced'
-                                  collaborativeSetBlockCanonicalMode(
-                                    blockId,
-                                    `${tool.type}:${canonicalId}`,
-                                    nextMode
-                                  )
-                                },
-                              }
-                            : undefined
+                      const renderOrder: RenderItem[] = displaySubBlocks.map((sb) => ({
+                        kind: 'subblock' as const,
+                        sb,
+                      }))
 
-                        const sbWithTitle = sb.title
-                          ? sb
-                          : { ...sb, title: formatParameterLabel(effectiveParamId) }
-
-                        renderedElements.push(
-                          <ToolSubBlockRenderer
-                            key={sb.id}
-                            blockId={blockId}
-                            subBlockId={subBlockId}
-                            toolIndex={toolIndex}
-                            subBlock={sbWithTitle}
-                            effectiveParamId={effectiveParamId}
-                            toolParams={tool.params}
-                            onParamChange={handleParamChange}
-                            disabled={disabled}
-                            canonicalToggle={canonicalToggleProp}
-                          />
+                      if (showOAuth) {
+                        const credentialIdx = allBlockSubBlocks.findIndex(
+                          (sb) => sb.type === 'oauth-input'
                         )
-                      })
+                        if (credentialIdx >= 0) {
+                          const sbPositions = new Map(allBlockSubBlocks.map((sb, i) => [sb.id, i]))
+                          const insertAt = renderOrder.findIndex(
+                            (item) =>
+                              item.kind === 'subblock' &&
+                              (sbPositions.get(item.sb.id) ?? Number.POSITIVE_INFINITY) >
+                                credentialIdx
+                          )
+                          if (insertAt === -1) {
+                            renderOrder.push({ kind: 'oauth' })
+                          } else {
+                            renderOrder.splice(insertAt, 0, { kind: 'oauth' })
+                          }
+                        } else {
+                          renderOrder.unshift({ kind: 'oauth' })
+                        }
+                      }
+
+                      for (const item of renderOrder) {
+                        if (item.kind === 'oauth') {
+                          const el = renderOAuthAccount()
+                          if (el) renderedElements.push(el)
+                        } else {
+                          renderedElements.push(renderSubBlock(item.sb))
+                        }
+                      }
 
                       const uncoveredParams = displayParams.filter(
                         (param) =>
@@ -1873,6 +1922,11 @@ export const ToolInput = memo(function ToolInput({
                       )
                     }
 
+                    {
+                      const el = renderOAuthAccount()
+                      if (el) renderedElements.push(el)
+                    }
+
                     const filteredParams = displayParams.filter((param) =>
                       evaluateParameterCondition(param, tool)
                     )

apps/sim/app/workspace/[workspaceId]/w/[workflowId]/hooks/use-workflow-execution.ts

@@ -63,6 +63,7 @@ interface BlockEventHandlerConfig {
   executionIdRef: { current: string }
   workflowEdges: Array<{ id: string; target: string; sourceHandle?: string | null }>
   activeBlocksSet: Set<string>
+  activeBlockRefCounts: Map<string, number>
   accumulatedBlockLogs: BlockLog[]
   accumulatedBlockStates: Map<string, BlockState>
   executedBlockIds: Set<string>
@@ -309,6 +310,7 @@ export function useWorkflowExecution() {
         executionIdRef,
         workflowEdges,
         activeBlocksSet,
+        activeBlockRefCounts,
         accumulatedBlockLogs,
         accumulatedBlockStates,
         executedBlockIds,
@@ -328,9 +330,18 @@ export function useWorkflowExecution() {
       const updateActiveBlocks = (blockId: string, isActive: boolean) => {
         if (!workflowId) return
         if (isActive) {
+          const count = activeBlockRefCounts.get(blockId) ?? 0
+          activeBlockRefCounts.set(blockId, count + 1)
           activeBlocksSet.add(blockId)
         } else {
-          activeBlocksSet.delete(blockId)
+          const count = activeBlockRefCounts.get(blockId) ?? 1
+          const next = count - 1
+          if (next <= 0) {
+            activeBlockRefCounts.delete(blockId)
+            activeBlocksSet.delete(blockId)
+          } else {
+            activeBlockRefCounts.set(blockId, next)
+          }
         }
         setActiveBlocks(workflowId, new Set(activeBlocksSet))
       }
@@ -1280,6 +1291,7 @@ export function useWorkflowExecution() {
       }
 
       const activeBlocksSet = new Set<string>()
+      const activeBlockRefCounts = new Map<string, number>()
       const streamedContent = new Map<string, string>()
       const accumulatedBlockLogs: BlockLog[] = []
       const accumulatedBlockStates = new Map<string, BlockState>()
@@ -1292,6 +1304,7 @@ export function useWorkflowExecution() {
           executionIdRef,
           workflowEdges,
           activeBlocksSet,
+          activeBlockRefCounts,
           accumulatedBlockLogs,
           accumulatedBlockStates,
           executedBlockIds,
@@ -1902,6 +1915,7 @@ export function useWorkflowExecution() {
       const accumulatedBlockStates = new Map<string, BlockState>()
       const executedBlockIds = new Set<string>()
       const activeBlocksSet = new Set<string>()
+      const activeBlockRefCounts = new Map<string, number>()
 
       try {
         const blockHandlers = buildBlockEventHandlers({
@@ -1909,6 +1923,7 @@ export function useWorkflowExecution() {
           executionIdRef,
           workflowEdges,
           activeBlocksSet,
+          activeBlockRefCounts,
           accumulatedBlockLogs,
           accumulatedBlockStates,
           executedBlockIds,
@@ -2104,6 +2119,7 @@ export function useWorkflowExecution() {
 
     const workflowEdges = useWorkflowStore.getState().edges
     const activeBlocksSet = new Set<string>()
+    const activeBlockRefCounts = new Map<string, number>()
     const accumulatedBlockLogs: BlockLog[] = []
     const accumulatedBlockStates = new Map<string, BlockState>()
     const executedBlockIds = new Set<string>()
@@ -2115,6 +2131,7 @@ export function useWorkflowExecution() {
       executionIdRef,
       workflowEdges,
       activeBlocksSet,
+      activeBlockRefCounts,
       accumulatedBlockLogs,
       accumulatedBlockStates,
       executedBlockIds,

apps/sim/app/workspace/[workspaceId]/w/[workflowId]/utils/workflow-execution-utils.ts

@@ -39,6 +39,7 @@ export async function executeWorkflowWithFullLogging(
   const workflowEdges = useWorkflowStore.getState().edges
 
   const activeBlocksSet = new Set<string>()
+  const activeBlockRefCounts = new Map<string, number>()
 
   const payload: any = {
     input: options.workflowInput,
@@ -103,6 +104,8 @@ export async function executeWorkflowWithFullLogging(
 
           switch (event.type) {
             case 'block:started': {
+              const startCount = activeBlockRefCounts.get(event.data.blockId) ?? 0
+              activeBlockRefCounts.set(event.data.blockId, startCount + 1)
               activeBlocksSet.add(event.data.blockId)
               setActiveBlocks(wfId, new Set(activeBlocksSet))
 
@@ -115,8 +118,14 @@ export async function executeWorkflowWithFullLogging(
               break
             }
 
-            case 'block:completed':
-              activeBlocksSet.delete(event.data.blockId)
+            case 'block:completed': {
+              const completeCount = activeBlockRefCounts.get(event.data.blockId) ?? 1
+              if (completeCount <= 1) {
+                activeBlockRefCounts.delete(event.data.blockId)
+                activeBlocksSet.delete(event.data.blockId)
+              } else {
+                activeBlockRefCounts.set(event.data.blockId, completeCount - 1)
+              }
               setActiveBlocks(wfId, new Set(activeBlocksSet))
 
               setBlockRunStatus(wfId, event.data.blockId, 'success')
@@ -144,9 +153,16 @@ export async function executeWorkflowWithFullLogging(
                 options.onBlockComplete(event.data.blockId, event.data.output).catch(() => {})
               }
               break
+            }
 
-            case 'block:error':
-              activeBlocksSet.delete(event.data.blockId)
+            case 'block:error': {
+              const errorCount = activeBlockRefCounts.get(event.data.blockId) ?? 1
+              if (errorCount <= 1) {
+                activeBlockRefCounts.delete(event.data.blockId)
+                activeBlocksSet.delete(event.data.blockId)
+              } else {
+                activeBlockRefCounts.set(event.data.blockId, errorCount - 1)
+              }
               setActiveBlocks(wfId, new Set(activeBlocksSet))
 
               setBlockRunStatus(wfId, event.data.blockId, 'error')
@@ -171,6 +187,7 @@ export async function executeWorkflowWithFullLogging(
                 iterationContainerId: event.data.iterationContainerId,
               })
               break
+            }
 
             case 'execution:completed':
               executionResult = {

apps/sim/blocks/blocks/schedule.ts

@@ -122,6 +122,25 @@ export const ScheduleBlock: BlockConfig = {
       required: true,
       mode: 'trigger',
       condition: { field: 'scheduleType', value: 'custom' },
+      wandConfig: {
+        enabled: true,
+        prompt: `You are an expert at writing cron expressions. Generate a valid cron expression based on the user's description.
+
+Cron format: minute hour day-of-month month day-of-week
+- minute: 0-59
+- hour: 0-23
+- day-of-month: 1-31
+- month: 1-12
+- day-of-week: 0-7 (0 and 7 are Sunday)
+
+Special characters: * (any), , (list), - (range), / (step)
+
+{context}
+
+Return ONLY the cron expression, nothing else. No explanation, no backticks, no quotes.`,
+        placeholder: 'Describe your schedule (e.g., "every weekday at 9am")',
+        generationType: 'cron-expression',
+      },
     },
 
     {

apps/sim/blocks/blocks/slack.ts

@@ -604,7 +604,7 @@ Return ONLY the timestamp string - no explanations, no quotes, no extra text.`,
           case 'send': {
             baseParams.text = text
             if (threadTs) {
-              baseParams.thread_ts = threadTs
+              baseParams.threadTs = threadTs
             }
             // files is the canonical param from attachmentFiles (basic) or files (advanced)
             const normalizedFiles = normalizeFileInput(files)

apps/sim/blocks/types.ts

@@ -40,6 +40,7 @@ export type GenerationType =
   | 'neo4j-parameters'
   | 'timestamp'
   | 'timezone'
+  | 'cron-expression'
 
 export type SubBlockType =
   | 'short-input' // Single line input

apps/sim/executor/execution/block-executor.ts

@@ -428,7 +428,7 @@ export class BlockExecutor {
     block: SerializedBlock,
     executionOrder: number
   ): void {
-    const blockId = node.id
+    const blockId = node.metadata?.originalBlockId ?? node.id
     const blockName = block.metadata?.name ?? blockId
     const blockType = block.metadata?.id ?? DEFAULTS.BLOCK_TYPE
 
@@ -456,7 +456,7 @@ export class BlockExecutor {
     executionOrder: number,
     endedAt: string
   ): void {
-    const blockId = node.id
+    const blockId = node.metadata?.originalBlockId ?? node.id
     const blockName = block.metadata?.name ?? blockId
     const blockType = block.metadata?.id ?? DEFAULTS.BLOCK_TYPE
 

apps/sim/tools/params.ts

@@ -827,11 +827,10 @@ export function formatParameterLabel(paramId: string): string {
 }
 
 /**
- * SubBlock IDs that are "structural" — they control tool routing or auth,
- * not user-facing parameters. These are excluded from tool-input rendering
- * unless they have an explicit paramVisibility set.
+ * SubBlock IDs that control tool routing, not user-facing parameters.
+ * Excluded from tool-input rendering unless they have an explicit paramVisibility set.
  */
-const STRUCTURAL_SUBBLOCK_IDS = new Set(['operation', 'authMethod', 'destinationType'])
+const STRUCTURAL_SUBBLOCK_IDS = new Set(['operation'])
 
 /**
  * SubBlock types that represent auth/credential inputs handled separately
@@ -955,12 +954,8 @@ export function getSubBlocksForToolInput(
         } else if (sb.id in toolParamVisibility) {
           visibility = toolParamVisibility[sb.id]
         } else if (sb.canonicalParamId) {
-          // SubBlock has a canonicalParamId that doesn't directly match a tool param.
-          // This means the block's params() function transforms it before sending to the tool
-          // (e.g. listFolderId → folderId). These are user-facing inputs, default to user-or-llm.
           visibility = 'user-or-llm'
         } else {
-          // SubBlock has no corresponding tool param — skip it
           continue
         }
       }

apps/sim/tools/slack/message.ts

@@ -57,7 +57,7 @@ export const slackMessageTool: ToolConfig<SlackMessageParams, SlackMessageRespon
       visibility: 'user-or-llm',
       description: 'Message text to send (supports Slack mrkdwn formatting)',
     },
-    thread_ts: {
+    threadTs: {
       type: 'string',
       required: false,
       visibility: 'user-or-llm',
@@ -84,7 +84,7 @@ export const slackMessageTool: ToolConfig<SlackMessageParams, SlackMessageRespon
         channel: isDM ? undefined : params.channel,
         userId: isDM ? params.dmUserId : params.userId,
         text: params.text,
-        thread_ts: params.thread_ts || undefined,
+        thread_ts: params.threadTs || undefined,
         files: params.files || null,
       }
     },

apps/sim/tools/slack/types.ts

@@ -516,7 +516,7 @@ export interface SlackMessageParams extends SlackBaseParams {
   dmUserId?: string
   userId?: string
   text: string
-  thread_ts?: string
+  threadTs?: string
   files?: UserFile[]
 }