Load Prompts from Github Repo and auto populate n8n expressions
Automate the process of loading AI prompts directly from your GitHub repository and dynamically populating them with n8n expressions before sending them to an AI agent for processing. This workflow connects to GitHub to fetch prompt files, then uses n8n's expression capabilities to insert variable data, ensuring your AI models receive contextually rich and up-to-date instructions. Developers and content creators can leverage this to manage AI prompt libraries in version control, enabling rapid iteration and consistent prompt delivery for tasks like content generation, code completion, or data analysis without manual copy-pasting. This significantly reduces the time and effort involved in maintaining and deploying AI prompts, ensuring accuracy and scalability across various AI-driven applications.
Workflow JSON
{"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": "", "name": "[Your githubApi]"}}, "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": "", "name": "[Your ollamaApi]"}}, "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 Import This Workflow
- 1Copy the workflow JSON above using the Copy Workflow JSON button.
- 2Open your n8n instance and go to Workflows.
- 3Click Import from JSON and paste the copied workflow.
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