Automated Daily Email Analysis & Summary with GPT-4o and Gmail

Nodes

Daily Email Pulse Summary:

This agent summarizes a user's daily emails into a clean, actionable summary. It uses OpenAI to analyze content and sends a formatted "Daily Pulse" email at the end of each day.

Main use cases:

Keep track of open loops and next steps across all email conversations

Identify high-potential leads and flag conversations going nowhere

Eliminate the need to manually review your inbox at day’s end

Build a smart summary layer using AI without hallucination or noise

How it works

This workflow can be divided into eight core nodes, each serving a distinct purpose in helping a user stay on top of their day. The result is a curated, AI-generated summary delivered to your inbox — crafted from real message content, not guesswork.

Schedule Trigger (Trigger Node – Runs Daily at Set Time)

Kicks off the workflow at a specific time each day (e.g. 6:00 PM).
Ensures you receive your Daily Pulse consistently, without needing to run it manually.

Date Transformer (Function Node – Define Today & Tomorrow Range)

Uses JavaScript to calculate the current day’s date range:
- today: Start of day (00:00:00)
- tomorrow: Start of next day (used as a cutoff)
This ensures only emails from today are analyzed, keeping the summary focused and current.

Get All Messages (Gmail Node – Fetch Filtered Emails)

Pulls in all Gmail messages with internalDate between today and tomorrow.
Outputs structured data: from, subject, and body text of each email.
This forms the raw data for the daily business pulse.

Aggregator (Function or Item Lists Node – Combine Message Fields)

Aggregates each message into a readable format:

From: John@example.com  
Subject: Demo Follow-up  
Body: Let’s schedule a time this week...

All messages are stitched together into a single combinedText string for analysis.
This gives the AI model full context for the day in one unified document.

Email Cleanup (Function Node – Remove Noise & Normalize Text)

Cleans the combinedText blob to remove:
- HTML tags
- Marketing footers (e.g., unsubscribe links)
- Redundant whitespace or formatting artifacts
Ensures GPT gets clean, relevant message content with no distractions.

Agent (OpenAI Node – Generate Structured Summary)

Uses a System Prompt to define its role as an AI Chief of Staff.
Uses a User Prompt that instructs it to categorize messages into sections:
- 📝 Open Loops / Pending Follow-Up
- 🚀 Next Steps You’ve Committed To
- 🧲 Leads Worth Following Up On
- 🛑 Conversations That Aren’t Leading Anywhere
- 🧠 Strategy Notes
- ✅ Top 3 Tasks for Tomorrow
Built-in guardrails ensure the model only uses real content (no hallucination).
Sections with no relevant data are omitted to keep it concise.

HTML Formatter (Function Node – Wrap Markdown in Email-Ready HTML)

Wraps the GPT-generated markdown summary in a simple <html><body><pre> structure.
Applies white-space: pre-wrap to preserve formatting and spacing.
The result is a clean, readable email that renders well across all inboxes (especially Gmail).

Email Send (Email Node – Deliver the Final Pulse)

Sends the formatted summary to your email inbox.
Subject: Your Daily Business Pulse – {{today}}
HTML body: Uses the formatted output from the previous step.
Final output: a well-organized, scannable summary of the day’s communication — focused on what matters.

Why It Works

Automates the end-of-day review ritual without effort
Prioritizes follow-ups, action items, and time-sensitive leads
Filters out noise and low-value conversations
Leverages GPT without risk of hallucination or irrelevant output
Delivers clarity, helping you focus on tomorrow’s most important tasks```language