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+Create X and LinkedIn posts from Reddit threads with Gemini and human review
+
+https://n8nworkflows.xyz/workflows/create-x-and-linkedin-posts-from-reddit-threads-with-gemini-and-human-review-14007
+
+
+# Create X and LinkedIn posts from Reddit threads with Gemini and human review
+
+# 1. Workflow Overview
+
+This workflow takes a Reddit thread URL submitted through an n8n form, retrieves the thread via Reddit’s public JSON API, extracts the post and comment discussion, summarizes it with Google Gemini, generates platform-specific content for X and LinkedIn, then pauses for human review before optionally publishing to both networks.
+
+Its primary use cases are:
+- Turning Reddit discussions into social-ready content
+- Accelerating social content research and drafting
+- Keeping a human approval step before publishing
+- Supporting optional manual edits without changing the AI generation flow
+
+## 1.1 Input Reception and URL Normalization
+The workflow starts with a form where a user submits a Reddit thread URL. A code node validates the URL and derives Reddit API-friendly values such as subreddit, post ID, and `.json` endpoint.
+
+## 1.2 Reddit Data Retrieval and Structuring
+The workflow calls Reddit’s public JSON API, then parses the response into:
+- post metadata
+- a nested comment tree
+- a flattened AI-friendly text representation of the thread
+
+## 1.3 AI Summarization
+Gemini receives the structured thread text and produces a markdown summary covering overview, key topics, notable insights, sentiment, and actionable takeaways.
+
+## 1.4 AI Social Post Generation
+A second Gemini node converts the summary into two drafts:
+- one X post
+- one LinkedIn post
+
+The expected return format is strict JSON.
+
+## 1.5 Response Parsing and Validation
+A code node extracts the Gemini output, removes code fences if needed, parses the JSON, validates required keys, and enforces the X character limit.
+
+## 1.6 Human Review and Final Content Resolution
+A Wait/Form node pauses the workflow and displays both generated posts. The reviewer can approve, reject, or override either post. A code node merges overrides with AI output.
+
+## 1.7 Decision and Publishing
+An IF node checks the reviewer’s decision:
+- if approved, the workflow posts to X and LinkedIn
+- if rejected, it ends gracefully with a rejection status message
+
+---
+
+# 2. Block-by-Block Analysis
+
+## Block 1: Form Input and Reddit URL Parsing
+
+### Overview
+This block collects a Reddit thread URL from the user and transforms it into a normalized, API-ready structure. It is the workflow’s only entry point and ensures downstream nodes receive a valid Reddit thread reference.
+
+### Nodes Involved
+- Reddit URL Input
+- Parse Reddit URL
+
+### Node Details
+
+#### 1. Reddit URL Input
+- **Type and technical role:** `n8n-nodes-base.formTrigger`  
+  Entry-point trigger node that exposes a hosted form and starts the workflow on submission.
+- **Configuration choices:**
+  - Form title: `Reddit Thread Post Generator`
+  - Description: indicates the form generates social media posts from a Reddit thread
+  - One field: `Reddit Thread URL`
+- **Key expressions or variables used:** None in parameters
+- **Input and output connections:**
+  - Input: none
+  - Output: `Parse Reddit URL`
+- **Version-specific requirements:** Uses `typeVersion: 2.5`; requires form trigger support in the installed n8n version
+- **Edge cases or potential failure types:**
+  - Empty field submission
+  - Invalid Reddit URL format passed downstream
+  - Form accessibility/webhook URL issues if n8n instance is not publicly reachable
+- **Sub-workflow reference:** None
+
+#### 2. Parse Reddit URL
+- **Type and technical role:** `n8n-nodes-base.code`  
+  JavaScript transformation node that validates and parses the submitted Reddit URL.
+- **Configuration choices:**
+  - Reads `Reddit Thread URL` from the form output
+  - Trims whitespace
+  - Normalizes scheme and removes `www.` / `m.` prefixes
+  - Uses regex to extract:
+    - subreddit
+    - post ID
+  - Builds:
+    - `apiUrl`
+    - `cleanThreadUrl`
+    - original URL copy
+- **Key expressions or variables used:**
+  - `$input.first().json['Reddit Thread URL']`
+  - Output fields:
+    - `originalUrl`
+    - `subreddit`
+    - `postId`
+    - `apiUrl`
+    - `cleanThreadUrl`
+- **Input and output connections:**
+  - Input: `Reddit URL Input`
+  - Output: `Fetch Reddit Thread`
+- **Version-specific requirements:** `typeVersion: 2`
+- **Edge cases or potential failure types:**
+  - Throws explicit error for invalid standard Reddit thread URLs
+  - The comment says it supports `redd.it`, but the actual regex only matches full `reddit.com/r/.../comments/...` URLs; short links are not actually handled by this implementation
+  - Missing or malformed form field name would break expression access
+- **Sub-workflow reference:** None
+
+---
+
+## Block 2: Reddit Thread Retrieval and Content Extraction
+
+### Overview
+This block fetches the Reddit thread data and transforms raw Reddit JSON into a structured representation usable by both humans and AI. It extracts metadata and recursively traverses comments to create a flat prompt string.
+
+### Nodes Involved
+- Fetch Reddit Thread
+- Extract Thread Content
+
+### Node Details
+
+#### 3. Fetch Reddit Thread
+- **Type and technical role:** `n8n-nodes-base.httpRequest`  
+  Performs the HTTP GET request against Reddit’s public JSON thread endpoint.
+- **Configuration choices:**
+  - URL: `={{ $json.apiUrl }}`
+  - Query parameters:
+    - `limit=100`
+    - `depth=3`
+  - Header:
+    - `User-Agent: n8n-workflow-automation/1.0`
+  - Sends query and headers explicitly
+- **Key expressions or variables used:**
+  - `{{ $json.apiUrl }}`
+- **Input and output connections:**
+  - Input: `Parse Reddit URL`
+  - Output: `Extract Thread Content`
+- **Version-specific requirements:** `typeVersion: 4.2`
+- **Edge cases or potential failure types:**
+  - Reddit rate limiting or temporary blocking
+  - Invalid or deleted thread causing non-useful response content
+  - NSFW/quarantined/private/community-restricted threads may not be accessible
+  - Network timeout or connectivity issues
+  - Reddit may return truncated discussion because `more` nodes are not expanded later
+- **Sub-workflow reference:** None
+
+#### 4. Extract Thread Content
+- **Type and technical role:** `n8n-nodes-base.code`  
+  Parses Reddit API response into post metadata, nested comments, statistics, and a flattened AI-ready text block.
+- **Configuration choices:**
+  - Handles either:
+    - API response as one array item
+    - multiple items from the HTTP node
+  - Extracts post metadata such as:
+    - title
+    - body
+    - author
+    - score
+    - upvote ratio
+    - subreddit
+    - comment count
+    - permalink
+    - link/self-post information
+    - flair
+    - awards
+  - Recursively traverses comment replies
+  - Sorts siblings by score descending at every level
+  - Skips:
+    - `more` placeholders
+    - deleted/removed/empty comments
+  - Builds:
+    - `structuredComments`
+    - `totalExtracted`
+    - `maxDepthFound`
+    - `threadContent`
+- **Key expressions or variables used:**
+  - `$input.first().json`
+  - `$input.all()`
+  - Output fields include:
+    - `structuredComments`
+    - `threadContent`
+    - post metadata fields like `title`, `body`, `threadUrl`, `numComments`
+- **Input and output connections:**
+  - Input: `Fetch Reddit Thread`
+  - Output: `Summarize Thread`
+- **Version-specific requirements:** `typeVersion: 2`
+- **Edge cases or potential failure types:**
+  - Throws if Reddit response shape is unexpected
+  - Can miss comments hidden behind Reddit `more` stubs because no secondary expansion call is made
+  - Deep or large threads can create very large prompt payloads
+  - Deleted post bodies or removed comments reduce available context
+  - `maxDepthFound` is inferred from indentation in generated lines; functional but indirect
+- **Sub-workflow reference:** None
+
+---
+
+## Block 3: AI Summarization
+
+### Overview
+This block converts the extracted Reddit discussion into a structured markdown summary. It provides the strategic intermediate representation used by the social copy generator.
+
+### Nodes Involved
+- Summarize Thread
+
+### Node Details
+
+#### 5. Summarize Thread
+- **Type and technical role:** `@n8n/n8n-nodes-langchain.googleGemini`  
+  Invokes Google Gemini to summarize the Reddit thread.
+- **Configuration choices:**
+  - Model: `models/gemini-3.1-flash-lite-preview`
+  - Prompt asks for markdown summary with sections:
+    - Thread Overview
+    - Key Topics Discussed
+    - Notable Insights & Perspectives
+    - Community Sentiment
+    - Actionable Takeaways
+  - Injects `threadContent`
+  - Options:
+    - `topK: 20`
+    - `temperature: 0.7`
+    - `maxToolsIterations: 5`
+  - Built-in tool enabled:
+    - `urlContext: true`
+  - `simplify: false`, so raw Gemini-style response structure is preserved
+- **Key expressions or variables used:**
+  - `{{ $json.threadContent }}`
+- **Input and output connections:**
+  - Input: `Extract Thread Content`
+  - Output: `Generate Social Posts`
+- **Version-specific requirements:**
+  - Requires the LangChain Gemini node package installed
+  - Requires valid `Google Gemini(PaLM) Api account` credentials
+  - Uses `typeVersion: 1.1`
+- **Edge cases or potential failure types:**
+  - Authentication or quota failures on Google Gemini
+  - Long Reddit threads may exceed model input limits
+  - Model may return incomplete or oddly structured output if prompt/token budget is constrained
+  - Preview model IDs may change or be deprecated over time
+- **Sub-workflow reference:** None
+
+---
+
+## Block 4: AI Social Post Generation
+
+### Overview
+This block turns the markdown summary into platform-specific social content. It instructs Gemini to output strict raw JSON with one X post and one LinkedIn post.
+
+### Nodes Involved
+- Generate Social Posts
+
+### Node Details
+
+#### 6. Generate Social Posts
+- **Type and technical role:** `@n8n/n8n-nodes-langchain.googleGemini`  
+  Uses Gemini to generate social posts from the prior summary.
+- **Configuration choices:**
+  - Model: `models/gemini-3.1-flash-lite-preview`
+  - Prompt positions the model as an expert social media strategist
+  - Uses summary text from the previous Gemini node
+  - Requires exact JSON shape:
+    - `x_post`
+    - `linkedin_post`
+  - No markdown fences or explanatory text allowed
+- **Key expressions or variables used:**
+  - `{{ $json.candidates[0].content.parts[0].text }}`
+- **Input and output connections:**
+  - Input: `Summarize Thread`
+  - Output: `Parse Social Posts`
+- **Version-specific requirements:**
+  - Same Gemini credential requirement as above
+  - `typeVersion: 1.1`
+- **Edge cases or potential failure types:**
+  - Depends on raw response structure from previous node because `simplify` is disabled there
+  - If the prior node output shape changes, this expression may fail
+  - Model may still return fenced JSON or malformed JSON despite instructions
+  - X post may exceed 280 characters; downstream parser truncates it
+- **Sub-workflow reference:** None
+
+---
+
+## Block 5: Social JSON Parsing and Validation
+
+### Overview
+This block normalizes Gemini’s output into clean workflow fields. It is designed defensively to handle multiple possible Gemini response shapes and malformed JSON.
+
+### Nodes Involved
+- Parse Social Posts
+
+### Node Details
+
+#### 7. Parse Social Posts
+- **Type and technical role:** `n8n-nodes-base.code`  
+  Extracts text from Gemini output, parses JSON, validates required fields, and enforces X length.
+- **Configuration choices:**
+  - Supports multiple response formats:
+    - array of candidates
+    - single candidate object
+    - `{ text: '...' }`
+    - nested `candidates`
+  - Removes code fences like ```json
+  - Tries `JSON.parse`
+  - Falls back to regex extraction for `x_post` and `linkedin_post`
+  - Trims content
+  - Truncates X text to 280 chars using `277 + '...'`
+- **Key expressions or variables used:**
+  - `$input.first().json`
+  - Output fields:
+    - `x_post`
+    - `linkedin_post`
+    - `x_char_count`
+- **Input and output connections:**
+  - Input: `Generate Social Posts`
+  - Output: `Human Approval`
+- **Version-specific requirements:** `typeVersion: 2`
+- **Edge cases or potential failure types:**
+  - Throws if no recognizable text field is present
+  - Throws if JSON cannot be parsed and regex fallback also fails
+  - Throws if parsed JSON lacks `x_post` or `linkedin_post`
+  - Character counting is simple string length; not tailored for every Unicode/display nuance on X
+- **Sub-workflow reference:** None
+
+---
+
+## Block 6: Human Review and Override Resolution
+
+### Overview
+This block introduces a human-in-the-loop approval checkpoint. The workflow pauses, displays both generated posts, captures approval or rejection, and merges any manual edits with the AI output.
+
+### Nodes Involved
+- Human Approval
+- Resolve Final Posts
+
+### Node Details
+
+#### 8. Human Approval
+- **Type and technical role:** `n8n-nodes-base.wait`  
+  Pauses execution and resumes via a form submission.
+- **Configuration choices:**
+  - Resume mode: `form`
+  - Form title: `📋 Review & Approve Social Media Posts`
+  - Description dynamically displays:
+    - current X draft
+    - X character count
+    - current LinkedIn draft
+  - Form fields:
+    - `X Post Override (leave blank to use AI version)` textarea
+    - `LinkedIn Post Override (leave blank to use AI version)` textarea
+    - `Decision` dropdown with:
+      - `Approve & Publish`
+      - `Reject`
+  - `Decision` is required
+- **Key expressions or variables used:**
+  - `{{ $json.x_char_count }}`
+  - `{{ $json.x_post }}`
+  - `{{ $json.linkedin_post }}`
+- **Input and output connections:**
+  - Input: `Parse Social Posts`
+  - Output: `Resolve Final Posts`
+- **Version-specific requirements:** `typeVersion: 1.1`
+- **Edge cases or potential failure types:**
+  - Resume webhook/form must remain reachable
+  - Long waiting periods may be affected by workflow retention/execution settings
+  - User may submit blank overrides, which is expected
+  - If someone manually enters empty-looking but whitespace-only overrides, code trims them out
+- **Sub-workflow reference:** None
+
+#### 9. Resolve Final Posts
+- **Type and technical role:** `n8n-nodes-base.code`  
+  Merges human overrides with the AI-generated drafts after the Wait node resumes.
+- **Configuration choices:**
+  - Reads resumed form submission from `$input.first().json`
+  - Explicitly references upstream node output:
+    - `$('Parse Social Posts').item.json`
+  - Logic:
+    - override wins if non-empty
+    - otherwise AI version is used
+  - Returns:
+    - `X Post`
+    - `LinkedIn Post`
+    - `usedOverrideX`
+    - `usedOverrideLi`
+- **Key expressions or variables used:**
+  - `$input.first().json`
+  - `$('Parse Social Posts').item.json`
+  - Form fields:
+    - `X Post Override (leave blank to use AI version)`
+    - `LinkedIn Post Override (leave blank to use AI version)`
+- **Input and output connections:**
+  - Input: `Human Approval`
+  - Output: `Approved?`
+- **Version-specific requirements:** `typeVersion: 2`
+- **Edge cases or potential failure types:**
+  - If node name `Parse Social Posts` changes, the explicit reference will break
+  - Throws if final X or LinkedIn post resolves to empty
+  - If execution data from prior node is unavailable due to retention or unusual execution mode, lookup could fail
+- **Sub-workflow reference:** None
+
+---
+
+## Block 7: Approval Routing and Publishing
+
+### Overview
+This final block evaluates the reviewer’s decision and either publishes both posts or exits cleanly without publishing. It is the enforcement point for human-controlled release.
+
+### Nodes Involved
+- Approved?
+- Post to X
+- Post to Linkedin
+- Rejected – End
+
+### Node Details
+
+#### 10. Approved?
+- **Type and technical role:** `n8n-nodes-base.if`  
+  Branches execution based on approval form data.
+- **Configuration choices:**
+  - Compares `Decision` from `Human Approval`
+  - Condition: equals `Approve & Publish`
+  - True branch publishes
+  - False branch rejects
+- **Key expressions or variables used:**
+  - `={{ $('Human Approval').item.json['Decision'] }}`
+- **Input and output connections:**
+  - Input: `Resolve Final Posts`
+  - True output: `Post to X`, `Post to Linkedin`
+  - False output: `Rejected – End`
+- **Version-specific requirements:** `typeVersion: 2`
+- **Edge cases or potential failure types:**
+  - Depends on exact node name `Human Approval`
+  - Depends on exact dropdown value `Approve & Publish`
+  - Renaming form field or option text breaks condition logic
+- **Sub-workflow reference:** None
+
+#### 11. Post to X
+- **Type and technical role:** `n8n-nodes-base.twitter`  
+  Publishes the final X post using X/Twitter OAuth2 credentials.
+- **Configuration choices:**
+  - Text: `={{ $json['X Post'] }}`
+- **Key expressions or variables used:**
+  - `{{ $json['X Post'] }}`
+- **Input and output connections:**
+  - Input: `Approved?` true branch
+  - Output: none
+- **Version-specific requirements:**
+  - Requires configured `X account` OAuth2 credentials
+  - Uses `typeVersion: 2`
+- **Edge cases or potential failure types:**
+  - Auth/token issues
+  - App permission limitations
+  - Duplicate content restrictions or policy-related API rejection
+  - Effective platform character rules may still reject certain content despite length truncation
+- **Sub-workflow reference:** None
+
+#### 12. Post to Linkedin
+- **Type and technical role:** `n8n-nodes-base.linkedIn`  
+  Publishes the final LinkedIn post.
+- **Configuration choices:**
+  - Text: `={{ $json['LinkedIn Post'] }}`
+  - Person: `ID`
+- **Key expressions or variables used:**
+  - `{{ $json['LinkedIn Post'] }}`
+- **Input and output connections:**
+  - Input: `Approved?` true branch
+  - Output: none
+- **Version-specific requirements:**
+  - Requires configured `LinkedIn account` OAuth2 credentials
+  - Uses `typeVersion: 1`
+  - The `person` field must be set correctly for the authenticated profile/account context
+- **Edge cases or potential failure types:**
+  - OAuth permission issues
+  - Invalid author/person ID configuration
+  - LinkedIn API restrictions on posting scope
+  - Post formatting may differ from preview due to LinkedIn rendering
+- **Sub-workflow reference:** None
+
+#### 13. Rejected – End
+- **Type and technical role:** `n8n-nodes-base.set`  
+  Creates a terminal structured output for the rejection path.
+- **Configuration choices:**
+  - Sets:
+    - `status = rejected`
+    - `message = Posts were reviewed and rejected by the user. No content was published.`
+- **Key expressions or variables used:** None
+- **Input and output connections:**
+  - Input: `Approved?` false branch
+  - Output: none
+- **Version-specific requirements:** `typeVersion: 3.4`
+- **Edge cases or potential failure types:**
+  - Minimal risk; primarily a terminal bookkeeping node
+- **Sub-workflow reference:** None
+
+---
+
+# 3. Summary Table
+
+| Node Name | Node Type | Functional Role | Input Node(s) | Output Node(s) | Sticky Note |
+|---|---|---|---|---|---|
+| Reddit URL Input | Form Trigger | Entry form for Reddit thread URL submission |  | Parse Reddit URL | ## 📥 Reddit URL Input<br>**Type:** Form Trigger<br>**Purpose:** Entry point — presents a web form to collect a Reddit thread URL from the user.<br>**Input:** User submits a Reddit thread URL via the form.<br>**Output:** Raw URL string forwarded to the parse step. |
+| Parse Reddit URL | Code | Validate and decompose Reddit URL into API-ready fields | Reddit URL Input | Fetch Reddit Thread | ## 🔍 Parse Reddit URL<br>**Type:** Code (JavaScript)<br>**Purpose:** Validates and deconstructs the submitted Reddit URL.<br>**Input:** Raw URL string<br>**Function:** Regex extraction of subreddit + post ID. Handles standard, mobile (`m.`) and short `redd.it` links.<br>**Output:** `subreddit`, `postId`, `apiUrl`, `cleanThreadUrl` |
+| Fetch Reddit Thread | HTTP Request | Retrieve Reddit thread JSON from public API | Parse Reddit URL | Extract Thread Content | ## 🌐 Fetch Reddit Thread<br>**Type:** HTTP Request<br>**Purpose:** Retrieves the full thread via Reddit's public JSON API.<br>**Input:** `apiUrl` (e.g. `reddit.com/r/sub/comments/id.json`)<br>**Function:** GET with `limit=100`, `depth=3`.<br>**Output:** Raw Reddit API response — post listing + comments listing array. |
+| Extract Thread Content | Code | Extract metadata, comments, and AI-ready thread text | Fetch Reddit Thread | Summarize Thread | ## ⚙️ Extract Content<br>**Type:** Code (JavaScript)<br>**Purpose:** Parses raw Reddit JSON into structured, AI-ready content.<br>**Input:** Raw Reddit API response<br>**Function:** Extracts post metadata; recursively traverses all comments sorted by score at every depth; builds a flat indented string for AI.<br>**Output:** `threadContent` (AI prompt string), `structuredComments` (nested JSON), post metadata |
+| Summarize Thread | Google Gemini | Produce markdown summary of thread discussion | Extract Thread Content | Generate Social Posts | ## 🧠 Summarize Thread<br>**Type:** Google Gemini AI<br>**Purpose:** Produces a comprehensive markdown summary of the Reddit thread.<br>**Input:** `threadContent` from Extract node<br>**Function:** Gemini 3.1 Flash Lite → returns Thread Overview, Key Topics, Notable Insights, Community Sentiment, and Actionable Takeaways.<br>**Output:** Structured markdown summary text |
+| Generate Social Posts | Google Gemini | Generate X and LinkedIn post drafts from summary | Summarize Thread | Parse Social Posts | ## ✍️ Generate Social Posts<br>**Type:** Google Gemini AI<br>**Purpose:** Creates platform-optimized posts for X and LinkedIn.<br>**Input:** Thread summary from Summarize node<br>**Function:** Gemini generates: X post (≤280 chars, punchy + hashtags) and LinkedIn post (150–300 words, professional + hashtags). Returns strict JSON only.<br>**Output:** `{ "x_post": "...", "linkedin_post": "..." }` |
+| Parse Social Posts | Code | Parse and validate AI JSON response for social posts | Generate Social Posts | Human Approval | ## 🧹 Parse Social Posts<br>**Type:** Code (JavaScript)<br>**Purpose:** Safely extracts and validates Gemini's JSON response.<br>**Input:** Raw Gemini API response<br>**Function:** Strips markdown fences, parses JSON, falls back to regex if malformed. Enforces 280-char hard limit on X post.<br>**Output:** `x_post`, `linkedin_post`, `x_char_count` |
+| Human Approval | Wait | Pause for manual review, approval, or override | Parse Social Posts | Resolve Final Posts | ## 👤 Human Approval<br>**Type:** Wait (Form)<br>**Purpose:** Pauses the workflow so a human can review posts.<br>**Input:** `x_post`, `linkedin_post`, `x_char_count`<br>**Function:** Displays posts in a form. User can overrides or use AI version. Must select **Approve & Publish** or **Reject**.<br>**Output:** Form submission with `Decision` + optional override fields. |
+| Resolve Final Posts | Code | Merge manual overrides with AI-generated posts | Human Approval | Approved? | ## ✅ Resolve Final Posts<br>**Type:** Code (JavaScript)<br>**Purpose:** Merges human overrides with AI-generated posts.<br>**Input:** Form data + AI posts (referenced from Parse Social Posts node)<br>**Function:** Override wins if non-empty; otherwise falls back to the AI version. Throws if both are empty.<br>**Output:** `X Post`, `LinkedIn Post` (final content ready to publish) |
+| Approved? | IF | Route based on approval decision | Resolve Final Posts | Post to X; Post to Linkedin; Rejected – End | ## 🔀 Approved?<br>**Type:** IF Condition<br>**Purpose:** Routes the workflow based on the human's decision.<br>**Input:** `Decision` field from Human Approval form<br>**True →** Post to X + Post to LinkedIn<br>**False →** Rejected – End (nothing published) |
+| Post to X | X (Twitter) | Publish final post to X | Approved? |  | ## 🐦 Post to X<br>**Type:** X (Twitter)<br>**Purpose:** Publishes the final post to X (Twitter).<br>**Input:** `X Post` (≤280 chars) from Resolve Final Posts<br>**Output:** Live tweet on the connected X account. |
+| Post to Linkedin | LinkedIn | Publish final post to LinkedIn | Approved? |  | ## 💼 Post to LinkedIn<br>**Type:** LinkedIn<br>**Purpose:** Publishes the final post to LinkedIn.<br>**Input:** `LinkedIn Post` from Resolve Final Posts<br>**Output:** Live post on the connected LinkedIn account. |
+| Rejected – End | Set | Terminal rejection output without publishing | Approved? |  | ## 🚫 Rejected – End<br>**Type:** Set<br>**Purpose:** Graceful termination — nothing is published.<br>**Input:** Rejection path from Approved? node<br>**Function:** Sets `status: 'rejected'` and a descriptive message.<br>**Output:** Terminal state — workflow ends here. |
+| 🗒️ Workflow Summary | Sticky Note | Documentation note |  |  | ## 🔁 Reddit → Social Media Automation<br>Converts any Reddit thread into ready-to-publish posts for **X (Twitter)** and **LinkedIn** — with a human review gate before anything goes live.<br>**📌 Data Flow:**<br>Reddit URL → Parse → Fetch API → Extract Content → AI Summarize → Generate Posts → Human Approval → Publish<br>**✨ Key Features:**<br>- Accepts any Reddit thread URL<br>- Extracts post + all nested comments (sorted by score)<br>- AI-powered thread summarization via Gemini<br>- Platform-optimized X + LinkedIn post generation<br>- Human-in-the-loop approval with override support<br>- Graceful rejection path — nothing published without approval<br>**🛠️ Tools Used:**<br>Google Gemini 3.1 Flash Lite · Reddit JSON API · X (Twitter) API · LinkedIn API |
+| 🌐 Node: Fetch Reddit Thread | Sticky Note | Documentation note |  |  |  |
+| Sticky Note1 | Sticky Note | Documentation note |  |  |  |
+| Sticky Note2 | Sticky Note | Documentation note |  |  |  |
+| Sticky Note3 | Sticky Note | Documentation note |  |  |  |
+| Sticky Note4 | Sticky Note | Documentation note |  |  |  |
+| Sticky Note5 | Sticky Note | Documentation note |  |  |  |
+| Sticky Note6 | Sticky Note | Documentation note |  |  |  |
+| Sticky Note7 | Sticky Note | Documentation note |  |  |  |
+| Sticky Note8 | Sticky Note | Documentation note |  |  |  |
+| Sticky Note9 | Sticky Note | Documentation note |  |  |  |
+| Sticky Note10 | Sticky Note | Documentation note |  |  |  |
+| Sticky Note11 | Sticky Note | Documentation note |  |  |  |
+| Sticky Note | Sticky Note | Documentation note |  |  |  |
+
+---
+
+# 4. Reproducing the Workflow from Scratch
+
+1. **Create a new workflow**
+   - Name it something like: `Reddit Thread → AI Summary → Social Media Publisher (X + LinkedIn)`.
+   - Keep execution order at the default compatible mode used by your n8n version.
+
+2. **Add the Form Trigger node**
+   - Node type: `Form Trigger`
+   - Name: `Reddit URL Input`
+   - Form title: `Reddit Thread Post Generator`
+   - Form description: `generates social media posts based on reddit thread`
+   - Add one form field:
+     - Label: `Reddit Thread URL`
+   - This is the workflow entry point.
+
+3. **Add a Code node after the form**
+   - Node type: `Code`
+   - Name: `Parse Reddit URL`
+   - Paste JavaScript that:
+     - reads `Reddit Thread URL`
+     - trims it
+     - normalizes scheme/domain prefix
+     - extracts subreddit and post ID from standard Reddit thread URLs
+     - outputs `originalUrl`, `subreddit`, `postId`, `apiUrl`, `cleanThreadUrl`
+   - Connect: `Reddit URL Input` → `Parse Reddit URL`
+
+4. **Add an HTTP Request node**
+   - Node type: `HTTP Request`
+   - Name: `Fetch Reddit Thread`
+   - Method: `GET`
+   - URL: `={{ $json.apiUrl }}`
+   - Enable query parameters:
+     - `limit` = `100`
+     - `depth` = `3`
+   - Enable headers:
+     - `User-Agent` = `n8n-workflow-automation/1.0`
+   - Connect: `Parse Reddit URL` → `Fetch Reddit Thread`
+
+5. **Add a second Code node for Reddit extraction**
+   - Node type: `Code`
+   - Name: `Extract Thread Content`
+   - Paste JavaScript that:
+     - parses Reddit’s listing response
+     - extracts thread metadata
+     - recursively traverses comments
+     - sorts comments by score at each level
+     - skips invalid/deleted/removed comments
+     - creates:
+       - `structuredComments`
+       - `threadContent`
+       - `totalExtracted`
+       - `maxDepthFound`
+       - post metadata fields
+   - Connect: `Fetch Reddit Thread` → `Extract Thread Content`
+
+6. **Add a Google Gemini node for summarization**
+   - Node type: `Google Gemini` from the LangChain-compatible n8n package
+   - Name: `Summarize Thread`
+   - Credentials: create/select `Google Gemini(PaLM) Api account`
+   - Model: `models/gemini-3.1-flash-lite-preview`
+   - Set messages with one prompt that:
+     - injects `{{ $json.threadContent }}`
+     - requests a markdown summary with sections for overview, topics, insights, sentiment, and takeaways
+   - Recommended options from this workflow:
+     - `topK: 20`
+     - `temperature: 0.7`
+     - `maxToolsIterations: 5`
+   - Set `simplify` to `false`
+   - Enable built-in tool `urlContext` if available in your version
+   - Connect: `Extract Thread Content` → `Summarize Thread`
+
+7. **Add another Google Gemini node for social generation**
+   - Node type: `Google Gemini`
+   - Name: `Generate Social Posts`
+   - Reuse the same Gemini credentials
+   - Model: `models/gemini-3.1-flash-lite-preview`
+   - Prompt should:
+     - describe the model as an expert social strategist
+     - inject the summary from the previous node using:
+       `{{ $json.candidates[0].content.parts[0].text }}`
+     - ask for:
+       - X post under 280 chars with hashtags
+       - LinkedIn post 150–300 words with final-line hashtags
+     - require raw JSON only in the exact format:
+       - `x_post`
+       - `linkedin_post`
+   - Connect: `Summarize Thread` → `Generate Social Posts`
+
+8. **Add a Code node to parse Gemini JSON**
+   - Node type: `Code`
+   - Name: `Parse Social Posts`
+   - Paste JavaScript that:
+     - extracts response text from possible Gemini output shapes
+     - strips markdown fences
+     - tries `JSON.parse`
+     - falls back to regex extraction if needed
+     - validates `x_post` and `linkedin_post`
+     - truncates X content to 280 chars max
+     - outputs:
+       - `x_post`
+       - `linkedin_post`
+       - `x_char_count`
+   - Connect: `Generate Social Posts` → `Parse Social Posts`
+
+9. **Add a Wait node configured as a review form**
+   - Node type: `Wait`
+   - Name: `Human Approval`
+   - Resume mode: `Form`
+   - Form title: `📋 Review & Approve Social Media Posts`
+   - Form description should display the generated drafts using expressions:
+     - X post and char count
+     - LinkedIn post
+   - Add three form fields:
+     1. Textarea: `X Post Override (leave blank to use AI version)`
+     2. Textarea: `LinkedIn Post Override (leave blank to use AI version)`
+     3. Dropdown: `Decision`
+        - `Approve & Publish`
+        - `Reject`
+        - mark as required
+   - Connect: `Parse Social Posts` → `Human Approval`
+
+10. **Add a Code node to resolve final content**
+    - Node type: `Code`
+    - Name: `Resolve Final Posts`
+    - Paste JavaScript that:
+      - reads form submission from `$input.first().json`
+      - references `$('Parse Social Posts').item.json`
+      - selects override values if non-empty
+      - falls back to AI values otherwise
+      - throws if final content is empty
+      - outputs:
+        - `X Post`
+        - `LinkedIn Post`
+        - `usedOverrideX`
+        - `usedOverrideLi`
+    - Important: keep the upstream parser node name exactly `Parse Social Posts`, or update the expression accordingly
+    - Connect: `Human Approval` → `Resolve Final Posts`
+
+11. **Add an IF node for approval routing**
+    - Node type: `IF`
+    - Name: `Approved?`
+    - Condition:
+      - left value: `={{ $('Human Approval').item.json['Decision'] }}`
+      - operator: equals
+      - right value: `Approve & Publish`
+    - Connect: `Resolve Final Posts` → `Approved?`
+
+12. **Add the X publishing node**
+    - Node type: `X` / `Twitter`
+    - Name: `Post to X`
+    - Credentials: create/select `X account` OAuth2
+    - Text field: `={{ $json['X Post'] }}`
+    - Connect from the **true** output of `Approved?` to `Post to X`
+
+13. **Add the LinkedIn publishing node**
+    - Node type: `LinkedIn`
+    - Name: `Post to Linkedin`
+    - Credentials: create/select `LinkedIn account` OAuth2
+    - Text field: `={{ $json['LinkedIn Post'] }}`
+    - Person/account field: configure the correct author context for the authenticated account
+    - In the provided workflow this is set to `ID`, which may need replacement with a real profile/person identifier depending on your n8n/LinkedIn setup
+    - Connect from the **true** output of `Approved?` to `Post to Linkedin`
+
+14. **Add a Set node for rejection**
+    - Node type: `Set`
+    - Name: `Rejected – End`
+    - Add fields:
+      - `status` = `rejected`
+      - `message` = `Posts were reviewed and rejected by the user. No content was published.`
+    - Connect from the **false** output of `Approved?` to `Rejected – End`
+
+15. **Configure credentials**
+    - **Google Gemini(PaLM) Api account**
+      - Required for both Gemini nodes
+      - Ensure the API key/project has access to the chosen Gemini model
+    - **X account OAuth2**
+      - Required for `Post to X`
+      - Verify write permissions for posting
+    - **LinkedIn account OAuth2**
+      - Required for `Post to Linkedin`
+      - Verify posting permissions and correct actor/person context
+
+16. **Optionally add documentation sticky notes**
+    - Add sticky notes around each logical region:
+      - Input
+      - URL parsing
+      - Reddit fetch
+      - content extraction
+      - summary
+      - social generation
+      - parsing
+      - review
+      - resolution
+      - approval
+      - publishing
+      - rejection
+
+17. **Test with a known public Reddit thread**
+    - Submit a standard URL like:
+      `https://www.reddit.com/r/<subreddit>/comments/<postId>/<slug>/`
+    - Verify:
+      - URL parsing works
+      - Reddit fetch returns valid JSON
+      - Gemini generates summary and JSON social output
+      - approval form displays both drafts
+      - approve path posts successfully
+      - reject path ends with rejection status
+
+18. **Recommended hardening before production**
+    - Expand URL parser if you truly need `redd.it` short links
+    - Add retry/error handling around Reddit and Gemini nodes
+    - Validate LinkedIn person/author ID explicitly
+    - Consider content moderation/review rules before publishing
+    - Add logging or persistence for approved/rejected decisions
+
+### Sub-workflow setup
+This workflow does **not** invoke any sub-workflows and has only one entry point: the `Reddit URL Input` form trigger.
+
+---
+
+# 5. General Notes & Resources
+
+| Note Content | Context or Link |
+|---|---|
+| Converts any Reddit thread into ready-to-publish posts for X (Twitter) and LinkedIn, with a human review gate before publication. | Overall workflow purpose |
+| Data flow: Reddit URL → Parse → Fetch API → Extract Content → AI Summarize → Generate Posts → Human Approval → Publish | Overall workflow structure |
+| Key features: accepts Reddit thread URLs, extracts nested comments sorted by score, summarizes with Gemini, generates platform-specific drafts, includes human approval and rejection path. | Overall workflow capabilities |
+| Tools used: Google Gemini 3.1 Flash Lite, Reddit JSON API, X (Twitter) API, LinkedIn API. | Technology stack |
+| Important implementation note: the URL parsing code claims to support `redd.it` short links, but the current regex only matches full `reddit.com/r/.../comments/...` URLs. | Practical correction for maintainers |
+| Important implementation note: the comment extractor recursively traverses available replies, but does not expand Reddit `more` placeholders, so some comments may remain unextracted on large threads. | Data completeness limitation |
+| Important implementation note: both `Resolve Final Posts` and `Approved?` rely on hard-coded node names in expressions. Renaming those nodes requires updating the expressions too. | Maintenance consideration |
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