Reddit Post Workflow
This workflow uses AI to gather the latest news, formats it into a Reddit post, validates the structure, and automatically submits it to a subreddit.
- Preview
- JSON
- Node Configuration
This workflow chains a DuckDuckGo-powered AI node to research and draft a Reddit post, a second AI node to reformat the output, a Data Validation node to enforce the correct schema, and finally the Reddit Post node to submit the post.
{
"nodes": [
{
"id": "c94d442b-c03b-4101-a2ab-5d8a8a9b6cb9",
"type": "llm-process",
"position": {
"x": 844,
"y": 231.5
},
"data": {
"title": "AI Data Processing",
"model": "gemma4:e2b",
"prompt": "You are a Reddit post writer.\nGather the latest AI technology news from the last week (you have access to \"duckDuckGoSearch\" tool to search the web - the tool use is mandatory), then create a Reddit text post summary (include the liks) with a catchy title.\nOutput only a single valid JSON object with these exact fields: `subreddit`, `postType`, `postTitle`, `postBody`, `postFlair`, `nsfw`, and `spoiler`.\n- `subreddit` must be `r/test`\n- `postType` must be `self`\n- `postFlair` must be an empty string\n- `nsfw` must be `false`\n- `spoiler` must be `false`\nDo not include any extra explanation, markdown, or text outside the JSON object.\n\nExample JSON output:\n{\n \"subreddit\": \"r/test\",\n \"postType\": \"self\",\n \"postTitle\": post title,\n \"postBody\": post body,\n \"postFlair\": \"\",\n \"nsfw\": false,\n \"spoiler\": false\n}\n",
"message": {},
"format": {
"onSuccess": ""
},
"maxFeedbackLoops": 1,
"maxToolRetries": 3
},
"measured": {
"width": 160,
"height": 40
},
"selected": false,
"dragging": false
},
{
"id": "d442cdaa-15da-4f0b-867b-ae26ee996d8d",
"type": "reddit-post",
"position": {
"x": 1294,
"y": 206.5
},
"data": {
"title": "Reddit Post",
"subreddit": "",
"postType": "self",
"postTitle": "",
"postBody": "",
"postFlair": "",
"nsfw": false,
"spoiler": false,
"clientId": "",
"clientSecret": "",
"postProvidedByUpstream": true
},
"measured": {
"width": 160,
"height": 40
},
"selected": false,
"dragging": false
},
{
"id": "ddd49c73-5b22-44c3-a105-dc2932aefe76",
"type": "ai-tool",
"position": {
"x": 792.5,
"y": 307.5
},
"data": {
"title": "DuckDuckGo Search Tool",
"toolSubtype": "duckduckgo-search",
"userConfig": {
"maxResults": 5,
"requireToolUse": true
},
"userConfigSchema": {
"maxResults": {
"type": "integer",
"description": "Maximum number of results to return",
"default": 5,
"minimum": 1,
"maximum": 20
},
"requireToolUse": {
"type": "boolean",
"description": "Require tool use (forces the LLM to always call this tool)",
"default": true
}
}
},
"measured": {
"width": 120,
"height": 40
},
"selected": false,
"dragging": false
},
{
"id": "a312c98d-1904-4775-a370-7d8cb0640624",
"type": "data-validation",
"position": {
"x": 1086,
"y": 238
},
"data": {
"title": "Data Validation",
"schema": "{\n \"type\": \"object\",\n \"properties\": {\n \"subreddit\": {\n \"type\": \"string\",\n \"const\": \"r/test\"\n },\n \"postType\": {\n \"type\": \"string\",\n \"const\": \"self\"\n },\n \"postTitle\": {\n \"type\": \"string\"\n },\n \"postBody\": {\n \"type\": \"string\"\n },\n \"postFlair\": {\n \"type\": \"string\",\n \"const\": \"\"\n },\n \"nsfw\": {\n \"type\": \"boolean\",\n \"const\": false\n },\n \"spoiler\": {\n \"type\": \"boolean\",\n \"const\": false\n }\n },\n \"required\": [\"subreddit\", \"postType\", \"postTitle\", \"postBody\", \"postFlair\", \"nsfw\", \"spoiler\"],\n \"additionalProperties\": false\n}"
},
"measured": {
"width": 120,
"height": 40
},
"selected": false,
"dragging": false
},
{
"id": "586facaf-6c70-4b30-87ed-604556a11d72",
"type": "llm-process",
"position": {
"x": 1065,
"y": 346
},
"data": {
"title": "AI Data Processing",
"model": "llama3.2:3b",
"prompt": "You need to properly format the data received. Make sure you receive something similar to:\n{\n \"subreddit\": \"r/test\",\n \"postType\": \"self\",\n \"postTitle\": post title,\n \"postBody\": post body,\n \"postFlair\": \"\",\n \"nsfw\": false,\n \"spoiler\": false\n}\n\nIf the data received is not like that, then you need to respond with an error.",
"format": {
"onSuccess": "{\n \"type\": \"object\",\n \"properties\": {\n \"subreddit\": {\n \"type\": \"string\",\n \"const\": \"r/test\"\n },\n \"postType\": {\n \"type\": \"string\",\n \"const\": \"self\"\n },\n \"postTitle\": {\n \"type\": \"string\"\n },\n \"postBody\": {\n \"type\": \"string\"\n },\n \"postFlair\": {\n \"type\": \"string\",\n \"const\": \"\"\n },\n \"nsfw\": {\n \"type\": \"boolean\",\n \"const\": false\n },\n \"spoiler\": {\n \"type\": \"boolean\",\n \"const\": false\n }\n },\n \"required\": [\"subreddit\", \"postType\", \"postTitle\", \"postBody\", \"postFlair\", \"nsfw\", \"spoiler\"],\n \"additionalProperties\": false\n}",
"onError": "{\n \"type\": \"object\",\n \"properties\": {\n \"error\": { \"type\": \"string\" }\n },\n \"required\": [\"error\"]\n}"
},
"maxFeedbackLoops": 0,
"maxToolRetries": 3
},
"measured": {
"width": 160,
"height": 40
},
"selected": false,
"dragging": false
},
{
"id": "d6dbd8d2-b017-486f-bdbf-a310b994d497",
"type": "data-flow-spy",
"position": {
"x": 1293,
"y": 317
},
"data": {
"title": "Data Flow Spy"
},
"measured": {
"width": 120,
"height": 40
},
"selected": false,
"dragging": false
}
],
"edges": [
{
"type": "smoothstep",
"animated": false,
"source": "ddd49c73-5b22-44c3-a105-dc2932aefe76",
"sourceHandle": "right-source",
"target": "c94d442b-c03b-4101-a2ab-5d8a8a9b6cb9",
"targetHandle": "tools-target",
"id": "xy-edge__ddd49c73-5b22-44c3-a105-dc2932aefe76right-source-c94d442b-c03b-4101-a2ab-5d8a8a9b6cb9tools-target"
},
{
"type": "smoothstep",
"animated": false,
"source": "586facaf-6c70-4b30-87ed-604556a11d72",
"sourceHandle": "right-source",
"target": "a312c98d-1904-4775-a370-7d8cb0640624",
"targetHandle": "left-target",
"id": "xy-edge__586facaf-6c70-4b30-87ed-604556a11d72right-source-a312c98d-1904-4775-a370-7d8cb0640624left-target"
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{
"type": "smoothstep",
"animated": false,
"source": "d442cdaa-15da-4f0b-867b-ae26ee996d8d",
"sourceHandle": "right-source",
"target": "d6dbd8d2-b017-486f-bdbf-a310b994d497",
"targetHandle": "left-target",
"id": "xy-edge__d442cdaa-15da-4f0b-867b-ae26ee996d8dright-source-d6dbd8d2-b017-486f-bdbf-a310b994d497left-target",
"selected": false
},
{
"type": "smoothstep",
"animated": false,
"source": "c94d442b-c03b-4101-a2ab-5d8a8a9b6cb9",
"sourceHandle": "right-source",
"target": "586facaf-6c70-4b30-87ed-604556a11d72",
"targetHandle": "left-target",
"id": "xy-edge__c94d442b-c03b-4101-a2ab-5d8a8a9b6cb9right-source-586facaf-6c70-4b30-87ed-604556a11d72left-target"
},
{
"type": "smoothstep",
"animated": false,
"source": "a312c98d-1904-4775-a370-7d8cb0640624",
"sourceHandle": "right-source",
"target": "d442cdaa-15da-4f0b-867b-ae26ee996d8d",
"targetHandle": "left-target",
"id": "xy-edge__a312c98d-1904-4775-a370-7d8cb0640624right-source-d442cdaa-15da-4f0b-867b-ae26ee996d8dleft-target"
}
]
}
- AI Data Processing (Writer)
- Model:
gemma4:e2b - Prompt: Instructs the AI to search for the latest AI technology news using DuckDuckGo and output a single JSON object with the Reddit post fields.
- Max Feedback Loops:
1 - Max Tool Retries:
3
- Model:
- DuckDuckGo Search Tool
- Max Results:
5 - Require Tool Use:
true
- Max Results:
- AI Data Processing (Formatter)
- Model:
llama3.2:3b - Prompt: Reformats and validates the JSON structure from the writer node.
- Format on Success: JSON schema enforcing the Reddit post object shape.
- Format on Error: JSON schema returning an
errorfield. - Max Feedback Loops:
0 - Max Tool Retries:
3
- Model:
- Data Validation
- Schema: Enforces
subreddit,postType,postTitle,postBody,postFlair,nsfw, andspoilerfields.
- Schema: Enforces
- Reddit Post
- Client ID: (your Reddit app Client ID)
- Client Secret: (your Reddit app Client Secret)
- Post Provided by Upstream:
true
- Data Flow Spy
- Inspects the Reddit Post node output for debugging.
Steps
- Search and draft the post
- The first AI Data Processing node uses the DuckDuckGo Search tool to gather the latest AI technology news, then drafts a Reddit post as a JSON object.
- Reformat the output
- A second AI Data Processing node (llama3.2:3b) receives the draft and ensures the JSON strictly conforms to the expected shape, returning an error object if it does not.
- Validate the structure
- The Data Validation node applies a JSON schema to guarantee all required fields are present and correctly typed before the post is submitted.
- Submit to Reddit
- The Reddit Post node reads the upstream JSON and submits the post using the configured OAuth credentials.
- Inspect the result
- The Data Flow Spy node captures the Reddit Post node output for debugging and verification.
Common Use Cases
- Automated news summaries: Publish periodic AI-generated news digests to a subreddit.
- Content pipeline testing: Use
r/testas a sandbox to validate the full post pipeline before switching to a real subreddit. - Research-to-post automation: Chain any research source to the formatter and post the results to Reddit automatically.
Best Practices
- Authenticate before sharing: Complete the Reddit OAuth flow in the Reddit Post node settings before running or exporting this workflow.
- Use
r/testfirst: Always test withr/testto avoid unintended posts to real subreddits. - Never commit credentials: The
clientId,clientSecret, andaccessTokenfields are intentionally left empty in this template — fill them in at runtime only. - Tune the writer prompt: Adjust the writer node's prompt to target a different topic, subreddit, or post format.
- Increase
maxFeedbackLoops: If the writer model frequently produces malformed JSON, raising the feedback loop count gives it more attempts to self-correct.
Troubleshooting
- Post not submitted: Verify that the Reddit OAuth flow has been completed and the access token is valid. Re-authenticate if needed.
- Validation fails: Check the Data Validation node schema and ensure the formatter node's output exactly matches the required fields (including
postFlair: ""). - AI returns malformed JSON: Increase
maxFeedbackLoopson the writer node or switch to a larger/more instruction-following model. - Missing news results: Confirm the DuckDuckGo Search tool has
requireToolUse: trueand that the writer prompt explicitly instructs tool usage. clientId/clientSecretnot persisted after save: These fields are sanitized on workflow export by design — enter them directly in the node settings each session.