kenta This workflow corresponds to n8n.io template #17074 — we link there as the canonical source.
This workflow follows the Chainllm → OpenAI Chat recipe pattern — see all workflows that pair these two integrations.
The workflow JSON
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{
"id": "YOeDNnjmjtyThben",
"name": "Focus Time Defender \u2014 Auto-Block Deep Work Slots In Next Week's Calendar (Google Calendar \u2192 Slack)",
"tags": [],
"nodes": [
{
"id": "84f08fd6-b515-4b60-a824-5fa942563dd9",
"name": "Sticky Note",
"type": "n8n-nodes-base.stickyNote",
"position": [
-608,
-96
],
"parameters": {
"width": 480,
"height": 620,
"content": "## \ud83e\uddd8 Focus Time Defender\n\nEvery Sunday evening this workflow scans **next week's calendar**, finds the free gaps of 2+ hours inside your working hours, and books them as **\ud83e\uddd8 Focus Time** events before meetings can eat them. You get a Slack DM with your personal deep-work plan \u2014 or a warning if your week is already too fragmented.\n\n### \ud83d\udd27 Setup\n1. Connect **Google Calendar**, **OpenAI** and **Slack** credentials.\n2. Tune **\u2699\ufe0f My Preferences**: working hours, minimum block length, max blocks per week.\n3. Set your Slack handle in both Slack nodes.\n4. Activate \u2014 runs every **Sunday at 18:00**.\n\n### \ud83d\udca1 Why it's useful\n\"I'll find time for deep work\" never survives contact with other people's calendars. Booking the slots first reverses the default."
},
"typeVersion": 1
},
{
"id": "97624354-0dbb-4c28-aad7-56eb5d872932",
"name": "Sticky Note1",
"type": "n8n-nodes-base.stickyNote",
"position": [
368,
80
],
"parameters": {
"color": 4,
"width": 700,
"height": 420,
"content": "### 1\ufe0f\u20e3 Map next week\nLoad all events for the coming week and compute every free gap inside working hours (weekdays only)."
},
"typeVersion": 1
},
{
"id": "5664b582-910a-4cc0-954e-bfac44d5f2a6",
"name": "Sticky Note2",
"type": "n8n-nodes-base.stickyNote",
"position": [
1104,
80
],
"parameters": {
"color": 5,
"width": 660,
"height": 560,
"content": "### 2\ufe0f\u20e3 Claim the gaps\nIf usable gaps exist, book the best ones as \ud83e\uddd8 Focus Time events. If not, skip straight to the fragmentation warning."
},
"typeVersion": 1
},
{
"id": "f11518be-c644-48fb-835e-e041a0b9db93",
"name": "Sticky Note3",
"type": "n8n-nodes-base.stickyNote",
"position": [
1792,
80
],
"parameters": {
"color": 6,
"width": 656,
"height": 516,
"content": "### 3\ufe0f\u20e3 Your deep-work plan\nThe LLM writes a short personal plan suggesting what kind of work fits each protected block."
},
"typeVersion": 1
},
{
"id": "5a9031e8-97ec-4a55-83a3-10c4cc314205",
"name": "Every Sunday 18:00",
"type": "n8n-nodes-base.scheduleTrigger",
"position": [
-64,
336
],
"parameters": {
"rule": {
"interval": [
{
"field": "weeks",
"triggerAtHour": 18
}
]
}
},
"typeVersion": 1.2
},
{
"id": "5f0a20d0-8f67-4896-b30b-6b24bdfcaef1",
"name": "\u2699\ufe0f My Preferences",
"type": "n8n-nodes-base.set",
"position": [
144,
336
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "pref-1",
"name": "workStartHour",
"type": "number",
"value": 9
},
{
"id": "pref-2",
"name": "workEndHour",
"type": "number",
"value": 18
},
{
"id": "pref-3",
"name": "minBlockHours",
"type": "number",
"value": 2
},
{
"id": "pref-4",
"name": "maxBlocksPerWeek",
"type": "number",
"value": 5
}
]
}
},
"typeVersion": 3.4
},
{
"id": "f8bd3aeb-7e2b-4c64-b5d0-6143cc50afd7",
"name": "Get Next Week's Events",
"type": "n8n-nodes-base.googleCalendar",
"position": [
432,
336
],
"parameters": {
"options": {},
"calendar": {
"__rl": true,
"mode": "list",
"value": ""
},
"operation": "getAll",
"returnAll": true
},
"typeVersion": 1.3
},
{
"id": "e6f5df43-ef4a-4609-b833-50ab1f783a74",
"name": "Find Free Gaps",
"type": "n8n-nodes-base.code",
"position": [
672,
336
],
"parameters": {
"jsCode": "// Find free gaps of at least `minBlockHours` inside working hours, Monday\u2013Friday\nconst prefs = $('\u2699\ufe0f My Preferences').first().json;\nconst events = $input.all()\n .map(i => i.json)\n .filter(e => e.start?.dateTime && e.status !== 'cancelled')\n .map(e => ({ start: new Date(e.start.dateTime), end: new Date(e.end.dateTime) }))\n .sort((a, b) => a.start - b.start);\n\nconst gaps = [];\nconst now = new Date();\n\nfor (let d = 1; d <= 6; d++) {\n const day = new Date(now);\n day.setDate(now.getDate() + d);\n const dow = day.getDay();\n if (dow === 0 || dow === 6) continue; // weekdays only\n\n const dayStart = new Date(day); dayStart.setHours(prefs.workStartHour, 0, 0, 0);\n const dayEnd = new Date(day); dayEnd.setHours(prefs.workEndHour, 0, 0, 0);\n\n const dayEvents = events.filter(e => e.start < dayEnd && e.end > dayStart);\n let cursor = dayStart;\n\n for (const e of [...dayEvents, { start: dayEnd, end: dayEnd }]) {\n const gapHours = (e.start - cursor) / 36e5;\n if (gapHours >= prefs.minBlockHours) {\n gaps.push({\n found: true,\n start: cursor.toISOString(),\n end: new Date(Math.min(e.start, cursor.getTime() + 3 * 36e5)).toISOString(),\n durationHours: Number(Math.min(gapHours, 3).toFixed(1)),\n weekday: day.toLocaleDateString('en-US', { weekday: 'long' })\n });\n }\n if (e.end > cursor) cursor = e.end;\n }\n}\n\nif (gaps.length === 0) {\n return [{ json: { found: false } }];\n}\n\nreturn gaps.map(g => ({ json: g }));"
},
"typeVersion": 2
},
{
"id": "7075c982-4012-4c21-ba50-49918598fbd7",
"name": "Any Focus Slots?",
"type": "n8n-nodes-base.if",
"position": [
912,
336
],
"parameters": {
"options": {},
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "loose"
},
"combinator": "and",
"conditions": [
{
"id": "if-1",
"operator": {
"type": "boolean",
"operation": "true",
"singleValue": true
},
"leftValue": "={{ $json.found }}",
"rightValue": true
}
]
}
},
"typeVersion": 2.2
},
{
"id": "26861c03-7c3e-490d-b851-6086e49cdd68",
"name": "Cap Blocks Per Week",
"type": "n8n-nodes-base.limit",
"position": [
1168,
240
],
"parameters": {
"maxItems": "={{ $('\u2699\ufe0f My Preferences').first().json.maxBlocksPerWeek }}"
},
"typeVersion": 1
},
{
"id": "1eea4e63-ad54-49ff-9c7a-790517f3441b",
"name": "Book Focus Block",
"type": "n8n-nodes-base.googleCalendar",
"position": [
1392,
240
],
"parameters": {
"end": "={{ $json.end }}",
"start": "={{ $json.start }}",
"calendar": {
"__rl": true,
"mode": "list",
"value": ""
},
"additionalFields": {
"color": "9",
"summary": "\ud83e\uddd8 Focus Time (protected by n8n)",
"description": "Deep work block booked automatically by the Focus Time Defender workflow. Decline meeting invites that collide with this!"
}
},
"typeVersion": 1.3
},
{
"id": "1bc68df0-ec22-4f91-abf0-2cdba175ec4c",
"name": "Bundle Booked Blocks",
"type": "n8n-nodes-base.aggregate",
"position": [
1616,
240
],
"parameters": {
"options": {},
"aggregate": "aggregateAllItemData",
"destinationFieldName": "blocks"
},
"typeVersion": 1
},
{
"id": "58f4b712-4810-4c19-9bba-04705310eec7",
"name": "Write My Focus Plan",
"type": "@n8n/n8n-nodes-langchain.chainLlm",
"position": [
1856,
240
],
"parameters": {
"text": "=I just protected these deep-work blocks in my calendar for next week:\n\n{{ JSON.stringify($('Cap Blocks Per Week').all().map(i => i.json), null, 2) }}\n\nWrite me a short, motivating Slack message (max 180 words):\n1. List each block (weekday + time range, human-readable)\n2. Suggest what type of work fits each slot (long blocks \u2192 hard creative work, shorter \u2192 reviews/writing)\n3. One practical tip to actually defend these blocks from meeting requests\n\nUse Slack formatting and keep it personal \u2014 this goes to one person, not a team.",
"messages": {
"messageValues": [
{
"message": "You are a supportive productivity coach who specializes in deep work."
}
]
},
"promptType": "define"
},
"typeVersion": 1.5
},
{
"id": "f1c908d3-c4c6-4e31-8e9e-89d1ef16d5a9",
"name": "OpenAI Chat Model",
"type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
"position": [
1856,
432
],
"parameters": {
"model": {
"__rl": true,
"mode": "list",
"value": "gpt-4o-mini"
},
"options": {}
},
"typeVersion": 1.2
},
{
"id": "26318297-4714-4f8e-a74b-2c4b70d72cc6",
"name": "DM My Focus Plan",
"type": "n8n-nodes-base.slack",
"position": [
2208,
240
],
"parameters": {
"text": "=\ud83e\uddd8 *Your deep-work plan for next week*\n\n{{ $json.text }}",
"user": {
"__rl": true,
"mode": "username",
"value": "your-slack-handle"
},
"select": "user",
"otherOptions": {}
},
"typeVersion": 2.3
},
{
"id": "9ec01fe1-a6be-4ff9-8836-44c101506c05",
"name": "Warn: Week Too Fragmented",
"type": "n8n-nodes-base.slack",
"position": [
1168,
448
],
"parameters": {
"text": "\u26a0\ufe0f *Focus Time Defender*: I couldn't find a single free 2-hour slot in your working hours next week. Your calendar is fully fragmented \u2014 consider declining or shortening some meetings, then re-run me.",
"user": {
"__rl": true,
"mode": "username",
"value": "your-slack-handle"
},
"select": "user",
"otherOptions": {}
},
"typeVersion": 2.3
}
],
"active": false,
"settings": {
"binaryMode": "separate",
"executionOrder": "v1"
},
"versionId": "8a4640bd-c675-4c80-b893-175b74e51e83",
"nodeGroups": [],
"connections": {
"Find Free Gaps": {
"main": [
[
{
"node": "Any Focus Slots?",
"type": "main",
"index": 0
}
]
]
},
"Any Focus Slots?": {
"main": [
[
{
"node": "Cap Blocks Per Week",
"type": "main",
"index": 0
}
],
[
{
"node": "Warn: Week Too Fragmented",
"type": "main",
"index": 0
}
]
]
},
"Book Focus Block": {
"main": [
[
{
"node": "Bundle Booked Blocks",
"type": "main",
"index": 0
}
]
]
},
"OpenAI Chat Model": {
"ai_languageModel": [
[
{
"node": "Write My Focus Plan",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Every Sunday 18:00": {
"main": [
[
{
"node": "\u2699\ufe0f My Preferences",
"type": "main",
"index": 0
}
]
]
},
"Cap Blocks Per Week": {
"main": [
[
{
"node": "Book Focus Block",
"type": "main",
"index": 0
}
]
]
},
"Write My Focus Plan": {
"main": [
[
{
"node": "DM My Focus Plan",
"type": "main",
"index": 0
}
]
]
},
"Bundle Booked Blocks": {
"main": [
[
{
"node": "Write My Focus Plan",
"type": "main",
"index": 0
}
]
]
},
"\u2699\ufe0f My Preferences": {
"main": [
[
{
"node": "Get Next Week's Events",
"type": "main",
"index": 0
}
]
]
},
"Get Next Week's Events": {
"main": [
[
{
"node": "Find Free Gaps",
"type": "main",
"index": 0
}
]
]
}
}
}
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About this workflow
This workflow runs every Sunday at 18:00 to scan your Google Calendar for next week, find free gaps of at least two hours within your working hours, auto-book them as “🧘 Focus Time” events, and then DM you a personalized deep-work plan in Slack using OpenAI. Runs every Sunday at…
Source: https://n8n.io/workflows/17074/ — original creator credit. Request a take-down →
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