チャットボットと GPT-4.1 を活用した自動 Slack チャンネルModeration ワークフロー

• •Slack Bot Token または Webhook URL

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      "name": "最終議論が30日前のチャンネルをフィルタ",
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        "jsCode": "const channels = $input.all().map(item => item.json);\n\nlet report = '*📊 Weekly Slack Channel Inactivity Report*\\n\\n';\nreport += 'The following channels have had *no discussion in the past 30 days*. Please review and take action if needed:\\n\\n';\nreport += '```';\nreport += 'Channel ID       Name                        Members  Created On   Purpose\\n';\nreport += '-------------   --------------------------  -------   ----------   ------------------------------\\n';\n\nfor (const c of channels) {\n  report += `${c.ChannelID.padEnd(15)} ${('#' + c.ChannelName).padEnd(26)} ${String(c.TotalMember).padEnd(9)} ${c.CreatedDate.padEnd(12)} ${c.Purpose || 'N/A'}\\n`;\n}\n\nreport += '```\\n\\n';\n\nreport += '\\n⚠️ *Recommendation:*\\n';\nreport += '- Channels with *0 members* or *no defined purpose* should be reviewed for archiving.\\n';\nreport += '- Channels like `#aws-study-group` and `#team-coffee` may benefit from engagement prompts or repurposing.\\n\\n';\n\nreport += `📅 _Report generated on:_ ${new Date().toLocaleDateString('en-GB')}`;\n\n// Output for Slack\nreturn [\n  {\n    json: {\n      text: report\n    }\n  }\n];"
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        "content": "# Automated Slack Channel Audit Workflow with Chatbot and GPT-4.1\n![](https://wisestackai.s3.ap-southeast-1.amazonaws.com/slack-channel-inactivity-report-workflow.jpg)\n> Automatically scans all public Slack channels weekly to detect those with no activity in the past 30 days, then generates and sends a detailed inactivity report to admins for review and action. Helps keep your Slack workspace clean, relevant, and clutter-free.\n\n## 🧑‍💼 Who’s it for\n\nThis workflow is built for:\n- **Slack Workspace Admins**\n- **IT or Ops Managers**\n- **HR/Compliance Teams**\n…who want to maintain a clean and active Slack workspace by regularly reviewing **inactive channels**.\n\n## ⚙️ How it works / What it does\n\nThis automated n8n workflow:\n1. **Runs weekly** via a scheduled trigger.\n2. **Fetches all public Slack channels** in the workspace.\n3. **Checks message history** of each channel for activity.\n4. **Filters channels** that have had **no discussion in the past 30 days**.\n5. **Generates a Slack-friendly report** with key metadata (name, member count, purpose, etc.).\n6. **Sends the report to a Slack channel** for admin review and possible action (e.g., archive, engage, repurpose).\n\n## 🛠️ How to set up\n\n1. **Configure your Slack App**\n   - Go to https://api.slack.com/apps → Create App\n   - Add the following **OAuth scopes** to your **Bot Token**:\n     - `channels:read` → to get list of public channels\n     - `channels:history` → to fetch message history\n     - `users:read` → to personalize report (optional)\n     - `chat:write` → to post the report to a Slack channel\n\n2. **Install the app in your workspace**  \n   - Copy the **Bot User OAuth Token**  \n   - Add it to your n8n Slack credentials under \"Slack API\"\n\n3. **Customize the schedule** in the \"Weekly Schedule Trigger\" node to control report frequency.\n\n4. **Connect your Slack workspace** to the workflow using your credentials.\n\n## ✅ Requirements\n\n- n8n (self-hosted or cloud)\n- Slack App with:\n  - `channels:read`\n  - `channels:history`\n  - `chat:write`\n- Active channels and member data\n- A designated Slack channel to receive the report\n\n## 🔧 How to customize the workflow\n\n| Component | Customization Options |\n|----------|------------------------|\n| ⏱️ Schedule Trigger | Change to daily, monthly, etc. |\n| 📅 Inactivity Threshold | Modify `Filter channel with last discussion 30 days ago` to 60/90 days |\n| 📊 Report Formatting | Tweak the `Consume slack report` node to change formatting or summary |\n| 💬 Output Channel | Change target channel in `Send Channel Inactivity Report` |\n| 🚫 Auto-archiving | Add logic to archive channels with 0 members or activity (using Slack API) |\n\n## 📝 Slack Permissions Reference\n\n| Action | Slack Scope Required |\n|--------|-----------------------|\n| Get all public channels | `channels:read` |\n| Get message history of a channel | `channels:history` |\n| Post message to Slack | `chat:write` |\n| Get user info (optional) | `users:read` |"
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        "content": "### 1. ⏰ Weekly Schedule Trigger\nStarts the workflow on a recurring schedule (e.g., every Monday at 9 AM) to automate the review process without manual intervention."
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        "content": "### 2. 📡 Get Many Channels\nFetches a list of all public Slack channels in the workspace using Slack’s `channels:read` scope."
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      "parameters": {
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        "content": "### 3. 🕓 Get the History of a Channel\nRetrieves recent message history from each channel using Slack’s `channels:history` scope. This helps determine when the last discussion occurred."
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      "parameters": {
        "content": "### 4. 🚫 Filter Channels with No Activity in 30 Days\nFilters out channels that have had no messages or discussion in the last 30 days. These are considered \"expired\" or inactive."
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      "parameters": {
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        "content": "### 5. 📦 Collect Expired Channel Information\nExtracts relevant metadata for each inactive channel, including:\n- Channel ID and name\n- Member count\n- Created date\n- Purpose\n\nThis data is prepared for reporting."
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      "parameters": {
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        "content": "### 6. 📝 Consume Slack Report\nGenerates a clean and Slack-friendly Markdown report (or code block format) listing all inactive channels with contextual recommendations."
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      "typeVersion": 1
    },
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      "parameters": {
        "content": "### 7. 📤 Send Channel Inactivity Report\nPosts the formatted report to a specified Slack channel using `chat:write`, notifying admins or moderators to take cleanup action."
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      "typeVersion": 1
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