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What you will build: an n8n workflow that reads every new Gmail email and asks Jev (TypeSafe AI's decision model) which team it belongs to, whether it is urgent, whether it needs a reply and whether the customer is upset. The workflow files the email under the right label, prepares a reply draft (never sent automatically) and keeps a record of every decision.

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The flow at a glance

Gmail (new email)
   โ””โ”€> Configuration (your settings)
        โ””โ”€> Extract email fields (sender, subject, body)
             โ””โ”€> Jev ยท Evaluate  : urgency (score) + needs a reply? (yes/no) + upset? (yes/no)
                  โ””โ”€> Jev ยท Route : Sales | Support | Billing | Partnerships | Newsletters | Spam
                       โ”‚            + Fallback output if confidence < 80 % -> "To review" label
                       โ””โ”€> Gmail label (Jev/...)
                            โ””โ”€> Collect routing decision
                                 โ””โ”€> If "Needs a reply?"
                                      โ”œโ”€ YES -> Write reply draft (LLM) -> Save reply as Gmail draft -> Log
                                      โ””โ”€ NO  -> Log Jev decision (Data Table)

<aside> ๐Ÿ’ก

The golden rule of this workflow: Jev decides, the LLM writes. Jev writes nothing: it picks from your options and returns a confidence level. The LLM (OpenAI) only steps in to write the draft, and only when Jev said a reply was needed.

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Contents

  1. Jev in 2 minutes
  2. Prerequisites & accounts
  3. Connect n8n to Claude (MCP + n8n Skills plugin)
  4. Install the Jev node on n8n (and fix the "Class could not be found" error)
  5. Prepare Gmail (labels) and the Data Table
  6. The Claude prompts used to build the workflow
  7. Node-by-node reference (to rebuild live)