added block kit support

Author: waleedlatif1

.github/workflows/test-build.yml

@@ -38,12 +38,6 @@ jobs:
           key: ${{ github.repository }}-node-modules
           path: ./node_modules
 
-      - name: Mount Next.js cache (Sticky Disk)
-        uses: useblacksmith/stickydisk@v1
-        with:
-          key: ${{ github.repository }}-next-cache
-          path: ./apps/sim/.next/cache
-
       - name: Install dependencies
         run: bun install --frozen-lockfile
 
@@ -116,7 +110,7 @@ jobs:
           RESEND_API_KEY: 'dummy_key_for_ci_only'
           AWS_REGION: 'us-west-2'
           ENCRYPTION_KEY: '7cf672e460e430c1fba707575c2b0e2ad5a99dddf9b7b7e3b5646e630861db1c' # dummy key for CI only
-        run: bun run build
+        run: bunx turbo run build --filter=sim
 
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v5

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

@@ -80,6 +80,7 @@ Send messages to Slack channels or direct messages. Supports Slack mrkdwn format
 | `dmUserId` | string | No | Slack user ID for direct messages \(e.g., U1234567890\) |
 | `text` | string | Yes | Message text to send \(supports Slack mrkdwn formatting\) |
 | `threadTs` | string | No | Thread timestamp to reply to \(creates thread reply\) |
+| `blocks` | json | No | Block Kit layout blocks as a JSON array. When provided, text becomes the fallback notification text. |
 | `files` | file[] | No | Files to attach to the message |
 
 #### Output
@@ -160,6 +161,7 @@ Send an ephemeral message visible only to a specific user in a channel. Optional
 | `user` | string | Yes | User ID who will see the ephemeral message \(e.g., U1234567890\). Must be a member of the channel. |
 | `text` | string | Yes | Message text to send \(supports Slack mrkdwn formatting\) |
 | `threadTs` | string | No | Thread timestamp to reply in. When provided, the ephemeral message appears as a thread reply. |
+| `blocks` | json | No | Block Kit layout blocks as a JSON array. When provided, text becomes the fallback notification text. |
 
 #### Output
 
@@ -704,6 +706,7 @@ Update a message previously sent by the bot in Slack
 | `channel` | string | Yes | Channel ID where the message was posted \(e.g., C1234567890\) |
 | `timestamp` | string | Yes | Timestamp of the message to update \(e.g., 1405894322.002768\) |
 | `text` | string | Yes | New message text \(supports Slack mrkdwn formatting\) |
+| `blocks` | json | No | Block Kit layout blocks as a JSON array. When provided, text becomes the fallback notification text. |
 
 #### Output
 

apps/sim/app/api/tools/slack/send-ephemeral/route.ts

@@ -14,6 +14,7 @@ const SlackSendEphemeralSchema = z.object({
   user: z.string().min(1, 'User ID is required'),
   text: z.string().min(1, 'Message text is required'),
   thread_ts: z.string().optional().nullable(),
+  blocks: z.array(z.record(z.unknown())).optional().nullable(),
 })
 
 export async function POST(request: NextRequest) {
@@ -58,6 +59,8 @@ export async function POST(request: NextRequest) {
         user: validatedData.user,
         text: validatedData.text,
         ...(validatedData.thread_ts && { thread_ts: validatedData.thread_ts }),
+        ...(validatedData.blocks &&
+          validatedData.blocks.length > 0 && { blocks: validatedData.blocks }),
       }),
     })
 

apps/sim/app/api/tools/slack/send-message/route.ts

@@ -17,6 +17,7 @@ const SlackSendMessageSchema = z
     userId: z.string().optional().nullable(),
     text: z.string().min(1, 'Message text is required'),
     thread_ts: z.string().optional().nullable(),
+    blocks: z.array(z.record(z.unknown())).optional().nullable(),
     files: RawFileInputArraySchema.optional().nullable(),
   })
   .refine((data) => data.channel || data.userId, {
@@ -63,6 +64,7 @@ export async function POST(request: NextRequest) {
         userId: validatedData.userId ?? undefined,
         text: validatedData.text,
         threadTs: validatedData.thread_ts ?? undefined,
+        blocks: validatedData.blocks ?? undefined,
         files: validatedData.files ?? undefined,
       },
       requestId,

apps/sim/app/api/tools/slack/update-message/route.ts

@@ -13,6 +13,7 @@ const SlackUpdateMessageSchema = z.object({
   channel: z.string().min(1, 'Channel is required'),
   timestamp: z.string().min(1, 'Message timestamp is required'),
   text: z.string().min(1, 'Message text is required'),
+  blocks: z.array(z.record(z.unknown())).optional().nullable(),
 })
 
 export async function POST(request: NextRequest) {
@@ -57,6 +58,8 @@ export async function POST(request: NextRequest) {
         channel: validatedData.channel,
         ts: validatedData.timestamp,
         text: validatedData.text,
+        ...(validatedData.blocks &&
+          validatedData.blocks.length > 0 && { blocks: validatedData.blocks }),
       }),
     })
 

apps/sim/app/api/tools/slack/utils.ts

@@ -11,7 +11,8 @@ export async function postSlackMessage(
   accessToken: string,
   channel: string,
   text: string,
-  threadTs?: string | null
+  threadTs?: string | null,
+  blocks?: unknown[] | null
 ): Promise<{ ok: boolean; ts?: string; channel?: string; message?: any; error?: string }> {
   const response = await fetch('https://slack.com/api/chat.postMessage', {
     method: 'POST',
@@ -23,6 +24,7 @@ export async function postSlackMessage(
       channel,
       text,
       ...(threadTs && { thread_ts: threadTs }),
+      ...(blocks && blocks.length > 0 && { blocks }),
     }),
   })
 
@@ -220,6 +222,7 @@ export interface SlackMessageParams {
   userId?: string
   text: string
   threadTs?: string | null
+  blocks?: unknown[] | null
   files?: any[] | null
 }
 
@@ -242,7 +245,7 @@ export async function sendSlackMessage(
   }
   error?: string
 }> {
-  const { accessToken, text, threadTs, files } = params
+  const { accessToken, text, threadTs, blocks, files } = params
   let { channel } = params
 
   if (!channel && params.userId) {
@@ -258,7 +261,7 @@ export async function sendSlackMessage(
   if (!files || files.length === 0) {
     logger.info(`[${requestId}] No files, using chat.postMessage`)
 
-    const data = await postSlackMessage(accessToken, channel, text, threadTs)
+    const data = await postSlackMessage(accessToken, channel, text, threadTs, blocks)
 
     if (!data.ok) {
       logger.error(`[${requestId}] Slack API error:`, data.error)
@@ -282,7 +285,7 @@ export async function sendSlackMessage(
   if (fileIds.length === 0) {
     logger.warn(`[${requestId}] No valid files to upload, sending text-only message`)
 
-    const data = await postSlackMessage(accessToken, channel, text, threadTs)
+    const data = await postSlackMessage(accessToken, channel, text, threadTs, blocks)
 
     if (!data.ok) {
       return { success: false, error: data.error || 'Failed to send message' }

apps/sim/blocks/blocks/slack.ts

@@ -199,6 +199,20 @@ export const SlackBlock: BlockConfig<SlackResponse> = {
       },
       required: true,
     },
+    {
+      id: 'messageFormat',
+      title: 'Message Format',
+      type: 'dropdown',
+      options: [
+        { label: 'Plain Text', id: 'text' },
+        { label: 'Block Kit', id: 'blocks' },
+      ],
+      value: () => 'text',
+      condition: {
+        field: 'operation',
+        value: ['send', 'ephemeral', 'update'],
+      },
+    },
     {
       id: 'text',
       title: 'Message',
@@ -207,8 +221,29 @@ export const SlackBlock: BlockConfig<SlackResponse> = {
       condition: {
         field: 'operation',
         value: ['send', 'ephemeral'],
+        and: { field: 'messageFormat', value: 'blocks', not: true },
+      },
+      required: {
+        field: 'operation',
+        value: ['send', 'ephemeral'],
+        and: { field: 'messageFormat', value: 'blocks', not: true },
+      },
+    },
+    {
+      id: 'blocks',
+      title: 'Block Kit Blocks',
+      type: 'code',
+      placeholder: 'JSON array of Block Kit blocks',
+      condition: {
+        field: 'operation',
+        value: ['send', 'ephemeral', 'update'],
+        and: { field: 'messageFormat', value: 'blocks' },
+      },
+      required: {
+        field: 'operation',
+        value: ['send', 'ephemeral', 'update'],
+        and: { field: 'messageFormat', value: 'blocks' },
       },
-      required: true,
     },
     {
       id: 'threadTs',
@@ -480,8 +515,13 @@ Return ONLY the timestamp string - no explanations, no quotes, no extra text.`,
       condition: {
         field: 'operation',
         value: 'update',
+        and: { field: 'messageFormat', value: 'blocks', not: true },
+      },
+      required: {
+        field: 'operation',
+        value: 'update',
+        and: { field: 'messageFormat', value: 'blocks', not: true },
       },
-      required: true,
     },
     // Delete Message specific fields
     {
@@ -581,12 +621,14 @@ Return ONLY the timestamp string - no explanations, no quotes, no extra text.`,
           destinationType,
           channel,
           dmUserId,
+          messageFormat,
           text,
           title,
           content,
           limit,
           oldest,
           files,
+          blocks,
           threadTs,
           ephemeralUser,
           updateTimestamp,
@@ -630,10 +672,13 @@ Return ONLY the timestamp string - no explanations, no quotes, no extra text.`,
 
         switch (operation) {
           case 'send': {
-            baseParams.text = text
+            baseParams.text = messageFormat === 'blocks' && !text ? ' ' : text
             if (threadTs) {
               baseParams.threadTs = threadTs
             }
+            if (blocks) {
+              baseParams.blocks = blocks
+            }
             // files is the canonical param from attachmentFiles (basic) or files (advanced)
             const normalizedFiles = normalizeFileInput(files)
             if (normalizedFiles) {
@@ -643,11 +688,14 @@ Return ONLY the timestamp string - no explanations, no quotes, no extra text.`,
           }
 
           case 'ephemeral': {
-            baseParams.text = text
+            baseParams.text = messageFormat === 'blocks' && !text ? ' ' : text
             baseParams.user = ephemeralUser ? String(ephemeralUser).trim() : ''
             if (threadTs) {
               baseParams.threadTs = threadTs
             }
+            if (blocks) {
+              baseParams.blocks = blocks
+            }
             break
           }
 
@@ -717,7 +765,10 @@ Return ONLY the timestamp string - no explanations, no quotes, no extra text.`,
 
           case 'update':
             baseParams.timestamp = updateTimestamp
-            baseParams.text = updateText
+            baseParams.text = messageFormat === 'blocks' && !updateText ? ' ' : updateText
+            if (blocks) {
+              baseParams.blocks = blocks
+            }
             break
 
           case 'delete':
@@ -736,6 +787,7 @@ Return ONLY the timestamp string - no explanations, no quotes, no extra text.`,
   },
   inputs: {
     operation: { type: 'string', description: 'Operation to perform' },
+    messageFormat: { type: 'string', description: 'Message format: text or blocks' },
     authMethod: { type: 'string', description: 'Authentication method' },
     destinationType: { type: 'string', description: 'Destination type (channel or dm)' },
     credential: { type: 'string', description: 'Slack access token' },
@@ -770,6 +822,7 @@ Return ONLY the timestamp string - no explanations, no quotes, no extra text.`,
     userLimit: { type: 'string', description: 'Maximum number of users to return' },
     // Ephemeral message inputs
     ephemeralUser: { type: 'string', description: 'User ID who will see the ephemeral message' },
+    blocks: { type: 'json', description: 'Block Kit layout blocks as a JSON array' },
     // Get User inputs
     userId: { type: 'string', description: 'User ID to look up' },
     // Get Message inputs

apps/sim/tools/slack/ephemeral_message.ts

@@ -64,6 +64,13 @@ export const slackEphemeralMessageTool: ToolConfig<
       description:
         'Thread timestamp to reply in. When provided, the ephemeral message appears as a thread reply.',
     },
+    blocks: {
+      type: 'json',
+      required: false,
+      visibility: 'user-or-llm',
+      description:
+        'Block Kit layout blocks as a JSON array. When provided, text becomes the fallback notification text.',
+    },
   },
 
   request: {
@@ -78,6 +85,8 @@ export const slackEphemeralMessageTool: ToolConfig<
       user: params.user?.trim(),
       text: params.text,
       thread_ts: params.threadTs || undefined,
+      blocks:
+        typeof params.blocks === 'string' ? JSON.parse(params.blocks) : params.blocks || undefined,
     }),
   },
 

apps/sim/tools/slack/message.ts

@@ -63,6 +63,13 @@ export const slackMessageTool: ToolConfig<SlackMessageParams, SlackMessageRespon
       visibility: 'user-or-llm',
       description: 'Thread timestamp to reply to (creates thread reply)',
     },
+    blocks: {
+      type: 'json',
+      required: false,
+      visibility: 'user-or-llm',
+      description:
+        'Block Kit layout blocks as a JSON array. When provided, text becomes the fallback notification text.',
+    },
     files: {
       type: 'file[]',
       required: false,
@@ -85,6 +92,10 @@ export const slackMessageTool: ToolConfig<SlackMessageParams, SlackMessageRespon
         userId: isDM ? params.dmUserId : params.userId,
         text: params.text,
         thread_ts: params.threadTs || undefined,
+        blocks:
+          typeof params.blocks === 'string'
+            ? JSON.parse(params.blocks)
+            : params.blocks || undefined,
         files: params.files || null,
       }
     },

apps/sim/tools/slack/types.ts

@@ -517,6 +517,7 @@ export interface SlackMessageParams extends SlackBaseParams {
   userId?: string
   text: string
   threadTs?: string
+  blocks?: string
   files?: UserFile[]
 }
 
@@ -546,6 +547,7 @@ export interface SlackUpdateMessageParams extends SlackBaseParams {
   channel: string
   timestamp: string
   text: string
+  blocks?: string
 }
 
 export interface SlackDeleteMessageParams extends SlackBaseParams {
@@ -589,6 +591,7 @@ export interface SlackEphemeralMessageParams extends SlackBaseParams {
   user: string
   text: string
   threadTs?: string
+  blocks?: string
 }
 
 export interface SlackGetThreadParams extends SlackBaseParams {