About this recipe
A recipe for Fetch Dynamic Prompts From Github And Auto Populate N8N Expressions In Prompt
Recipe Template
{
"id": "QyMyf3zraY0wxXDf",
"meta": {
"instanceId": "ba3fa76a571c35110ef5f67e5099c9a5c1768ef125c2f3b804ba20de75248c0b",
"templateCredsSetupCompleted": true
},
"name": "Load Prompts from Github Repo and auto populate n8n expressions",
"tags": [],
"nodes": [
{
"id": "34781446-b06e-41eb-83b8-b96bda1a5595",
"name": "When clicking \u2018Test workflow\u2019",
"type": "n8n-nodes-base.manualTrigger",
"position": [
-80,
0
],
"parameters": [],
"typeVersion": 1
},
{
"id": "c53b7243-7c82-47e0-a5ee-bd82bc51c386",
"name": "GitHub",
"type": "n8n-nodes-base.github",
"position": [
600,
0
],
"parameters": {
"owner": {
"__rl": true,
"mode": "name",
"value": "={{ $json.Account }}"
},
"filePath": "={{ $json.path }}{{ $json.prompt }}",
"resource": "file",
"operation": "get",
"repository": {
"__rl": true,
"mode": "name",
"value": "={{ $json.repo }}"
},
"additionalParameters": []
},
"credentials": {
"githubApi": {
"id": "ostHZNoe8GSsbaQM",
"name": "The GitHub account"
}
},
"typeVersion": 1
},
{
"id": "9976b199-b744-47a7-9d75-4b831274c01b",
"name": "Extract from File",
"type": "n8n-nodes-base.extractFromFile",
"position": [
840,
0
],
"parameters": {
"options": [],
"operation": "text"
},
"typeVersion": 1
},
{
"id": "26aa4e6a-c487-4cdf-91d5-df660cf826a6",
"name": "setVars",
"type": "n8n-nodes-base.set",
"position": [
180,
0
],
"parameters": {
"options": [],
"assignments": {
"assignments": [
{
"id": "150618c5-09b1-4f8b-a7b4-984662bf3381",
"name": "Account",
"type": "string",
"value": "TPGLLC-US"
},
{
"id": "22e8a3b0-bd53-485c-b971-7f1dd0686f0e",
"name": "repo",
"type": "string",
"value": "PeresPrompts"
},
{
"id": "ab94d0a1-ef3a-4fe9-9076-6882c6fda0ac",
"name": "path",
"type": "string",
"value": "SEO\/"
},
{
"id": "66f122eb-1cbd-4769-aac8-3f05cdb6c116",
"name": "prompt",
"type": "string",
"value": "keyword_research.md"
},
{
"id": "03fe26a3-04e6-439c-abcb-d438fc5203c0",
"name": "company",
"type": "string",
"value": "South Nassau Physical Therapy"
},
{
"id": "c133d216-a457-4872-a060-0ba4d94549af",
"name": "product",
"type": "string",
"value": "Manual Therapy"
},
{
"id": "584864dd-2518-45e2-b501-02828757fc3a",
"name": "features",
"type": "string",
"value": "pain relief"
},
{
"id": "0c4594cc-302a-4215-bdad-12cf54f57967",
"name": "sector",
"type": "string",
"value": "physical therapy"
}
]
}
},
"typeVersion": 3.4
},
{
"id": "9d92f581-8cd9-448c-aa1d-023a96c1ddda",
"name": "replace variables",
"type": "n8n-nodes-base.code",
"position": [
1900,
-20
],
"parameters": {
"jsCode": "\/\/ Fetch the prompt text\nconst prompt = $('SetPrompt').first().json.data; \/\/ Ensure the prompt contains placeholders like {{ some.node.value }}\n\n\/\/ Example variables object\nconst variables = {\n company: $('setVars').first().json.company,\n features: \"Awesome Software\",\n keyword: \"2025-02-07\"\n};\n\n\/\/ Function to replace placeholders dynamically\nconst replaceVariables = (text, vars) => {\n return text.replace(\/{{(.*?)}}\/g, (match, key) => {\n const trimmedKey = key.trim();\n \n \/\/ Extract last part after the last dot\n const finalKey = trimmedKey.split('.').pop();\n\n \/\/ Replace if key exists, otherwise leave placeholder unchanged\n return vars.hasOwnProperty(finalKey) ? vars[finalKey] : match;\n });\n};\n\n\/\/ Replace and return result\nreturn [{\n prompt: replaceVariables(prompt, variables)\n}];\n"
},
"typeVersion": 2
},
{
"id": "6c6c4fde-6ee5-47a8-894d-44d1afcedc2a",
"name": "If",
"type": "n8n-nodes-base.if",
"position": [
1560,
0
],
"parameters": {
"options": [],
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "2717a7e5-095a-42bf-8b5b-8050c3389ec5",
"operator": {
"type": "boolean",
"operation": "true",
"singleValue": true
},
"leftValue": "={{ $json.success }}",
"rightValue": "={{ $('Check All Prompt Vars Present').item.json.keys()}}"
}
]
}
},
"typeVersion": 2.2
},
{
"id": "3b7712b8-5152-4f60-9401-03c89c39e227",
"name": "Check All Prompt Vars Present",
"type": "n8n-nodes-base.code",
"position": [
1280,
0
],
"parameters": {
"jsCode": "\/\/ Get prompt text\nconst prompt = $json.data;\n\n\/\/ Extract variables inside {{ }} dynamically\nconst matches = [...prompt.matchAll(\/{{(.*?)}}\/g)];\nconst uniqueVars = [...new Set(matches.map(match => match[1].trim().split('.').pop()))];\n\n\/\/ Get variables from the Set Node\nconst setNodeVariables = $node[\"setVars\"].json || {};\n\n\/\/ Log extracted variables and Set Node keys\nconsole.log(\"Extracted Variables:\", uniqueVars);\nconsole.log(\"Set Node Keys:\", Object.keys(setNodeVariables));\n\n\/\/ Check if all required variables are present in the Set Node\nconst missingKeys = uniqueVars.filter(varName => !setNodeVariables.hasOwnProperty(varName));\n\nconsole.log(\"Missing Keys:\", missingKeys);\n\n\/\/ Return false if any required variable is missing, otherwise return true\nreturn [{\n success: missingKeys.length === 0,\n missingKeys: missingKeys\n}];\n"
},
"typeVersion": 2
},
{
"id": "32618e10-3285-4c16-9e78-058dde329337",
"name": "SetPrompt",
"type": "n8n-nodes-base.set",
"position": [
1060,
0
],
"parameters": {
"options": [],
"assignments": {
"assignments": [
{
"id": "335b450d-542a-4714-83d8-ccc237188fc5",
"name": "data",
"type": "string",
"value": "={{ $json.data }}"
}
]
}
},
"typeVersion": 3.4
},
{
"id": "4d8b34ca-50dd-4f37-b4f7-542291461662",
"name": "Stop and Error",
"type": "n8n-nodes-base.stopAndError",
"position": [
1900,
200
],
"parameters": {
"errorMessage": "=Missing Prompt Variables : {{ $('Check All Prompt Vars Present').item.json.missingKeys }}\n"
},
"typeVersion": 1
},
{
"id": "a78c1e17-9152-4241-bcdf-c0d723da543b",
"name": "Set Completed Prompt",
"type": "n8n-nodes-base.set",
"position": [
2220,
-20
],
"parameters": {
"options": [],
"assignments": {
"assignments": [
{
"id": "57a9625b-adea-4ee7-a72a-2be8db15f3d4",
"name": "Prompt",
"type": "string",
"value": "={{ $json.prompt }}"
}
]
}
},
"typeVersion": 3.4
},
{
"id": "51447c90-a222-4172-a49b-86ec43332559",
"name": "AI Agent",
"type": "@n8n\/n8n-nodes-langchain.agent",
"position": [
2440,
-20
],
"parameters": {
"text": "={{ $json.Prompt }}",
"options": [],
"promptType": "define"
},
"typeVersion": 1.7
},
{
"id": "f15b6af1-7af2-4515-be8f-960211118dce",
"name": "Sticky Note",
"type": "n8n-nodes-base.stickyNote",
"position": [
60,
-120
],
"parameters": {
"width": 340,
"height": 260,
"content": "# Set The variables in your prompt here"
},
"typeVersion": 1
},
{
"id": "163db6cc-5b06-4ae6-ac97-5890b37cdb18",
"name": "Sticky Note1",
"type": "n8n-nodes-base.stickyNote",
"position": [
520,
-120
],
"parameters": {
"color": 5,
"content": "## The repo is currently public for you to test with"
},
"typeVersion": 1
},
{
"id": "83ff6a86-a759-42a9-ace4-e20d57b906db",
"name": "Sticky Note2",
"type": "n8n-nodes-base.stickyNote",
"position": [
1780,
-200
],
"parameters": {
"width": 360,
"height": 260,
"content": "## Replaces the values in the prompt with the variables in the \n# 'setVars' Node"
},
"typeVersion": 1
},
{
"id": "7dd61153-84ac-4b59-b449-333825476c33",
"name": "Sticky Note3",
"type": "n8n-nodes-base.stickyNote",
"position": [
2000,
180
],
"parameters": {
"color": 3,
"content": "## If you're missing variables they will be listed here"
},
"typeVersion": 1
},
{
"id": "1f070dc3-3d25-41d8-b534-912ba7c8b2b0",
"name": "Prompt Output",
"type": "n8n-nodes-base.set",
"position": [
2800,
-20
],
"parameters": {
"options": [],
"assignments": {
"assignments": [
{
"id": "01a30683-c348-4712-a3b1-739fc4a17718",
"name": "promptResponse",
"type": "string",
"value": "={{ $json.output }}"
}
]
}
},
"typeVersion": 3.4
},
{
"id": "2d12a6e2-7976-41b0-8cb2-01466b28269d",
"name": "Ollama Chat Model",
"type": "@n8n\/n8n-nodes-langchain.lmChatOllama",
"position": [
2480,
200
],
"parameters": {
"options": []
},
"credentials": {
"ollamaApi": {
"id": "ERfZ8mAfQ1b0aoxZ",
"name": "Ollama account"
}
},
"typeVersion": 1
}
],
"active": false,
"pinData": [],
"settings": {
"executionOrder": "v1"
},
"versionId": "4327a337-59e7-4b5b-98e8-93c6be550972",
"connections": {
"If": {
"main": [
[
{
"node": "replace variables",
"type": "main",
"index": 0
}
],
[
{
"node": "Stop and Error",
"type": "main",
"index": 0
}
]
]
},
"GitHub": {
"main": [
[
{
"node": "Extract from File",
"type": "main",
"index": 0
}
]
]
},
"setVars": {
"main": [
[
{
"node": "GitHub",
"type": "main",
"index": 0
}
]
]
},
"AI Agent": {
"main": [
[
{
"node": "Prompt Output",
"type": "main",
"index": 0
}
]
]
},
"SetPrompt": {
"main": [
[
{
"node": "Check All Prompt Vars Present",
"type": "main",
"index": 0
}
]
]
},
"Extract from File": {
"main": [
[
{
"node": "SetPrompt",
"type": "main",
"index": 0
}
]
]
},
"Ollama Chat Model": {
"ai_languageModel": [
[
{
"node": "AI Agent",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"replace variables": {
"main": [
[
{
"node": "Set Completed Prompt",
"type": "main",
"index": 0
}
]
]
},
"Set Completed Prompt": {
"main": [
[
{
"node": "AI Agent",
"type": "main",
"index": 0
}
]
]
},
"Check All Prompt Vars Present": {
"main": [
[
{
"node": "If",
"type": "main",
"index": 0
}
]
]
},
"When clicking \u2018Test workflow\u2019": {
"main": [
[
{
"node": "setVars",
"type": "main",
"index": 0
}
]
]
}
}
}How to Use an n8n Template
1
Create a New Workflow
Click "New Workflow" in your n8n dashboard to get started.
2
Copy & Paste Template
First, copy this template:
Click here to copy the JSON
.
Then, in n8n, click the three dots (···) → "Import from file" and paste the JSON code.
3
Customize the Nodes
Go through each node in the workflow to update inputs like spreadsheet IDs, email addresses, or message content. Adjust field mappings to match your data.
4
Grant Access
For nodes that connect to external apps (like Google Sheets or Slack), you'll need to grant access. Connect your accounts using OAuth or an API key and save the credentials in the node.
5
Test It
Run the workflow by clicking "Execute Node" for each step or "Run Once" for the whole thing. Check the right sidebar to inspect data and debug any errors (they'll show up in red).
6
Activate Workflow
Once everything works as expected, click the "Activate" toggle to turn your workflow on. You're all set!