AI Newsletter System — Multi-Agent Research & Writing Workflow

Overview

The AI Newsletter System automates the research and writing behind a recurring newsletter. On a schedule, it gathers recent news for a chosen topic, plans the issue, writes it and leaves a ready-to-review draft in Gmail.

How it works

The workflow is organized as a small team of AI agents connected through OpenRouter. A schedule trigger starts an initial Tavily search on the main topic. A planning agent (GPT-5 Mini) reviews the results and produces a newsletter title plus three focused sub-topics, returned as structured JSON validated by an output parser.

The sub-topics are split into separate items, and each one gets its own Tavily deep-dive followed by a section-writer agent that drafts that section with source citations. The three sections are then aggregated and passed to an editor agent (GPT-5), which unifies tone, structure and flow, consolidates and deduplicates references into a single alphabetized list, keeps the issue under 1,000 words and formats it as clean, email-ready HTML.

The final step creates a draft in Gmail rather than sending automatically, keeping a human in the loop for review before publication. Topics, schedule and word limits are easy to adjust for any niche.