This workflow follows the Agent → Gmail recipe pattern — see all workflows that pair these two integrations.
The workflow JSON
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{
"id": "wyuE6DJqNXhX3K7B",
"name": "[2] Slack Approval \u2192 Ship/Revise/Confirm Handler (FIXED)",
"description": "Handles human responses to Holler's SITREP messages in Slack. Classifies intent as SHIP, REVISE, or CONFIRM and routes accordingly.",
"active": true,
"isArchived": false,
"nodes": [
{
"parameters": {
"trigger": [
"message"
],
"channelId": {
"__rl": true,
"mode": "id",
"value": "C0A0MBQ2L8P"
},
"options": {
"resolveIds": true
}
},
"id": "b55152b7-7d0d-4833-a469-404b4f349cb9",
"name": "Slack Trigger",
"type": "n8n-nodes-base.slackTrigger",
"typeVersion": 1,
"position": [
-1696,
352
]
},
{
"parameters": {
"url": "https://slack.com/api/conversations.replies",
"authentication": "predefinedCredentialType",
"nodeCredentialType": "slackOAuth2Api",
"sendQuery": true,
"queryParameters": {
"parameters": [
{
"name": "channel",
"value": "={{ $json.channel }}"
},
{
"name": "ts",
"value": "={{ $json.thread_ts }}"
}
]
},
"options": {}
},
"id": "a44632d1-751e-416a-b87b-693b5e1bdf49",
"name": "Get Thread Context",
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.3,
"position": [
-1248,
352
]
},
{
"parameters": {
"jsCode": "const messages = $input.first().json.messages || [];\nconst replyMessage = $('Slack Trigger').first().json.text || '';\nconst threadTs = $('Slack Trigger').first().json.thread_ts;\n\nconst hollerBotId = 'U0A0GJN18JK';\nlet parentContent = '';\nfor (const msg of messages) {\n if (msg.bot_id || msg.user === hollerBotId || !msg.user) {\n parentContent += (msg.text || '') + '\\n';\n } else {\n if (msg.ts !== $('Slack Trigger').first().json.ts) {\n break;\n }\n }\n}\n\nif (!parentContent.trim()) {\n parentContent = messages[0]?.text || '';\n}\n\nconst execIdMatch = parentContent.match(/Exec(?:ution)? ID[:\\s]*(\\d+)/i);\nconst executionId = execIdMatch ? execIdMatch[1].trim() : null;\n\nconst fromMatch = parentContent.match(/\\*From:\\*\\s*([^\\n]+)/);\nconst subjectMatch = parentContent.match(/\\*Subject:\\*\\s*([^\\n]+)/);\n\nreturn [{\n json: {\n execution_id: executionId,\n reply_text: replyMessage,\n thread_ts: threadTs,\n from_email: fromMatch ? fromMatch[1].trim() : '',\n subject: subjectMatch ? subjectMatch[1].trim() : '',\n parent_message: parentContent\n }\n}];"
},
"id": "817eecc3-7dd1-4da0-9f55-9f3b61e898fc",
"name": "Parse Thread Data",
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
-1024,
352
]
},
{
"parameters": {
"model": {
"__rl": true,
"value": "claude-sonnet-4-5-20250929",
"mode": "list"
},
"options": {}
},
"id": "a47ee7ab-0171-4cca-90d6-e5e020457b23",
"name": "Claude Sonnet 4",
"type": "@n8n/n8n-nodes-langchain.lmChatAnthropic",
"typeVersion": 1.3,
"position": [
-512,
272
]
},
{
"parameters": {
"promptType": "define",
"text": "={{ $json.reply_text }}",
"options": {
"systemMessage": "You are an intent classifier for email approval replies. Analyze the reply and return EXACTLY one word:\n\nSHIP - if approving/sending (e.g., \"ship it\", \"send it\", \"approved\", \"looks good\", \"go ahead\")\nREVISE - if requesting changes (e.g., \"revise\", \"change X\", \"make it shorter\", any specific feedback)\nCONFIRM - if just acknowledging (e.g., \"thanks\", \"got it\", \"confirmed\")\n\nOutput only: SHIP, REVISE, or CONFIRM"
}
},
"id": "e499f392-d39a-40f0-944e-d71520e9f14a",
"name": "Intent Classifier",
"type": "@n8n/n8n-nodes-langchain.agent",
"typeVersion": 3,
"position": [
-576,
48
]
},
{
"parameters": {
"rules": {
"values": [
{
"conditions": {
"conditions": [
{
"leftValue": "={{ $json.output }}",
"rightValue": "SHIP",
"operator": {
"type": "string",
"operation": "contains"
}
}
]
},
"renameOutput": true,
"outputKey": "SHIP"
},
{
"conditions": {
"conditions": [
{
"leftValue": "={{ $json.output }}",
"rightValue": "REVISE",
"operator": {
"type": "string",
"operation": "contains"
}
}
]
},
"renameOutput": true,
"outputKey": "REVISE"
},
{
"conditions": {
"conditions": [
{
"leftValue": "={{ $json.output }}",
"rightValue": "CONFIRM",
"operator": {
"type": "string",
"operation": "contains"
}
}
]
},
"renameOutput": true,
"outputKey": "CONFIRM"
}
]
},
"options": {
"fallbackOutput": "extra",
"ignoreCase": true,
"renameFallbackOutput": "CONFIRM"
}
},
"id": "b8cf9eed-fe37-401e-88eb-6bd305e6790c",
"name": "Route by Intent",
"type": "n8n-nodes-base.switch",
"typeVersion": 3.3,
"position": [
-224,
112
]
},
{
"parameters": {
"documentId": {
"__rl": true,
"mode": "id",
"value": "1xTng5h4vCWzFRtEvs05FX1lwguB6Mob-2G_LTgicn4I"
},
"sheetName": {
"__rl": true,
"value": "gid=0",
"mode": "list",
"cachedResultName": "Email Drafts"
},
"filtersUI": {
"values": [
{
"lookupColumn": "execution_id",
"lookupValue": "={{ $('Parse Thread Data').item.json.execution_id }}"
}
]
},
"options": {
"returnFirstMatch": true
}
},
"id": "fe59998f-6fdd-417f-96ca-2a06ce9050c0",
"name": "Get Draft from Sheet",
"type": "n8n-nodes-base.googleSheets",
"typeVersion": 4.5,
"position": [
0,
0
]
},
{
"parameters": {
"jsCode": "const draftBody = $input.first().json.draft_body || '';\n\nfunction markdownToHtml(text) {\n let html = text;\n html = html.replace(/\\r\\n/g, '\\n');\n html = html.replace(/\\n\\n+/g, '</p><p>');\n html = html.replace(/\\n/g, '<br>\\n');\n html = html.replace(/\\*\\*([^*]+)\\*\\*/g, '<strong>$1</strong>');\n html = html.replace(/__([^_]+)__/g, '<strong>$1</strong>');\n if (!html.startsWith('<p>')) html = '<p>' + html;\n if (!html.endsWith('</p>')) html = html + '</p>';\n html = html.replace(/<p><\\/p>/g, '');\n return html;\n}\n\nconst htmlBody = markdownToHtml(draftBody);\nconst originalData = $input.first().json;\n\nreturn [{ json: { ...originalData, draft_body_html: htmlBody, draft_body_original: draftBody } }];"
},
"id": "format-email-body-node",
"name": "Format Email Body",
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
112,
0
]
},
{
"parameters": {
"operation": "reply",
"messageId": "={{ $json.gmail_message_id }}",
"message": "={{ $json.draft_body_html }}",
"options": {}
},
"id": "70787849-c1b4-41bb-bb34-bf5717447b4d",
"name": "Send Email",
"type": "n8n-nodes-base.gmail",
"typeVersion": 2.1,
"position": [
336,
0
]
},
{
"parameters": {
"operation": "update",
"documentId": {
"__rl": true,
"mode": "id",
"value": "1xTng5h4vCWzFRtEvs05FX1lwguB6Mob-2G_LTgicn4I"
},
"sheetName": {
"__rl": true,
"value": "gid=0",
"mode": "list"
},
"columns": {
"mappingMode": "defineBelow",
"value": {
"execution_id": "={{ $('Parse Thread Data').item.json.execution_id }}",
"status": "sent",
"sent_at": "={{ $now.toISO() }}",
"updated_at": "={{ $now.toISO() }}"
},
"matchingColumns": [
"execution_id"
]
},
"options": {}
},
"id": "00bfa8b7-05e4-4077-807f-bd8e47137a89",
"name": "Update Sheet Status",
"type": "n8n-nodes-base.googleSheets",
"typeVersion": 4.5,
"position": [
560,
0
]
},
{
"parameters": {
"select": "channel",
"channelId": {
"__rl": true,
"mode": "id",
"value": "={{ $('Slack Trigger').first().json.channel }}"
},
"text": "Email sent successfully!",
"otherOptions": {}
},
"id": "b1116276-41e9-40f6-ab7b-6447dd47756a",
"name": "Confirm in Slack",
"type": "n8n-nodes-base.slack",
"typeVersion": 2.3,
"position": [
928,
-16
]
},
{
"parameters": {
"workflowId": {
"__rl": true,
"value": "t8sUvZ8xzoqNfYH5",
"mode": "id"
},
"workflowInputs": {
"mappingMode": "defineBelow",
"value": {
"execution_id": "={{ $('Parse Thread Data').item.json.execution_id }}",
"revision_count": "={{ ($('Get Draft for Revision').first().json.revision_count || 0) + 1 }}",
"human_feedback": "={{ $('Parse Thread Data').item.json.reply_text }}",
"original_email": "={{ { subject: $('Get Draft for Revision').first().json.original_subject, sender: $('Get Draft for Revision').first().json.sender_email, body: $('Get Draft for Revision').first().json.original_body } }}",
"previous_draft": "={{ $('Get Draft for Revision').first().json.draft_body }}",
"cinnamon_analysis": "={{ $('Get Draft for Revision').first().json.cinnamon_analysis }}",
"hatch_analysis": "={{ $('Get Draft for Revision').first().json.hatch_analysis }}"
}
},
"options": {}
},
"id": "e315674e-9545-47fd-9b8a-98166674090c",
"name": "Call SUB Workflow",
"type": "n8n-nodes-base.executeWorkflow",
"typeVersion": 1.3,
"position": [
432,
208
]
},
{
"parameters": {
"conditions": {
"conditions": [
{
"leftValue": "={{ $json.thread_ts }}",
"rightValue": "",
"operator": {
"type": "string",
"operation": "notEmpty"
}
},
{
"leftValue": "={{ $json.thread_ts }}",
"rightValue": "={{ $json.ts }}",
"operator": {
"type": "string",
"operation": "notEquals"
}
}
]
},
"options": {}
},
"id": "199f6d7c-4edf-4e40-902c-eaabb1468464",
"name": "Filter Holler Replies",
"type": "n8n-nodes-base.if",
"typeVersion": 2,
"position": [
-1472,
352
]
}
],
"connections": {
"Slack Trigger": {
"main": [
[
{
"node": "Filter Holler Replies",
"type": "main",
"index": 0
}
]
]
},
"Filter Holler Replies": {
"main": [
[
{
"node": "Get Thread Context",
"type": "main",
"index": 0
}
]
]
},
"Get Thread Context": {
"main": [
[
{
"node": "Parse Thread Data",
"type": "main",
"index": 0
}
]
]
},
"Parse Thread Data": {
"main": [
[
{
"node": "Check Parse Success",
"type": "main",
"index": 0
}
]
]
},
"Claude Sonnet 4": {
"ai_languageModel": [
[
{
"node": "Intent Classifier",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Intent Classifier": {
"main": [
[
{
"node": "Route by Intent",
"type": "main",
"index": 0
}
]
]
},
"Route by Intent": {
"main": [
[
{
"node": "Get Draft from Sheet",
"type": "main",
"index": 0
}
],
[
{
"node": "Get Draft for Revision",
"type": "main",
"index": 0
}
],
[
{
"node": "Update Sheet Confirmed",
"type": "main",
"index": 0
}
]
]
},
"Get Draft from Sheet": {
"main": [
[
{
"node": "Format Email Body",
"type": "main",
"index": 0
}
]
]
},
"Format Email Body": {
"main": [
[
{
"node": "Send Email",
"type": "main",
"index": 0
}
]
]
},
"Send Email": {
"main": [
[
{
"node": "Update Sheet Status",
"type": "main",
"index": 0
}
]
]
},
"Update Sheet Status": {
"main": [
[
{
"node": "Tag Original Email",
"type": "main",
"index": 0
}
]
]
},
"Tag Original Email": {
"main": [
[
{
"node": "Confirm in Slack",
"type": "main",
"index": 0
}
]
]
},
"Call SUB Workflow": {
"main": [
[
{
"node": "Assemble Revision SITREP",
"type": "main",
"index": 0
}
]
]
}
},
"settings": {
"executionOrder": "v1",
"callerPolicy": "workflowsFromSameOwner",
"availableInMCP": false
},
"meta": null
}
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About this workflow
[2] Slack Approval → Ship/Revise/Confirm Handler (FIXED). Uses slackTrigger, httpRequest, lmChatAnthropic, agent. Event-driven trigger; 13 nodes.
Source: https://github.com/8Dvibes/mindvalley-ai-mastery-students/blob/main/workflows/02-W2-Approval-Handler.json — original creator credit. Request a take-down →
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