Newsletter Generator

/**
 * Generates a weekly newsletter from scraped content and AI summarization.
 */

schedule weekly_newsletter {
  label: "Weekly Newsletter"
  cron: "0 8 * * 1"
  timezone: "America/Los_Angeles"
}

workflow generate_newsletter {
  label: "Generate Newsletter"

  root {
    type: code
    label: "Start"
    code: @ts {
      return { week_of: new Date().toISOString().split("T")[0] }
    }
    outputSchema: @json {
      {
        "type": "object",
        "properties": {
          "week_of": { "type": "string" }
        }
      }
    }
  }

  node scrape_blog {
    type: scrape
    label: "Scrape company blog"
    url: @ts { return "https://byteslice.co/blog" }
    onlyMainContent: true
    formats: ["markdown"]
  }

  node scrape_industry {
    type: scrape
    label: "Scrape industry news"
    url: @ts { return "https://news.ycombinator.com" }
    onlyMainContent: true
    formats: ["markdown"]
  }

  node compose {
    type: ai
    label: "Compose newsletter"
    kind: object
    model: "google/gemini-2.5-flash"
    prompt: @ts {
      const blog = context.nodes.scrape_blog.output
      const news = context.nodes.scrape_industry.output
      return "Write a weekly newsletter for the week of " + context.nodes.root.output.week_of + ".\n\nOur blog content:\n" + JSON.stringify(blog) + "\n\nIndustry news:\n" + JSON.stringify(news) + "\n\nFormat: intro paragraph, 3-5 highlights with brief summaries, closing note."
    }
    schema: @json {
      {
        "type": "object",
        "required": ["subject", "body_html"],
        "properties": {
          "subject": { "type": "string" },
          "body_html": { "type": "string" },
          "preview_text": { "type": "string" }
        }
      }
    }
    temperature: 0.8
  }

  node review_draft {
    type: code
    label: "Review draft"
    code: @ts { return {} }
    review: {
      enabled: true
      title: "Review newsletter draft"
      description: "Approve to send this week's newsletter, or discard to stop the run. The draft is in the compose node's output."
      schema: @json {
        {
          "type": "object",
          "properties": {
            "notes": { "type": "string", "title": "Notes" }
          },
          "additionalProperties": false
        }
      }
      actions: [
        { id: "send", label: "Send", outcome: "approve" },
        { id: "discard", label: "Discard", outcome: "reject" }
      ]
    }
  }

  node send_newsletter {
    type: email
    label: "Send newsletter"
    from: @ts { return "[email protected]" }
    to: @ts { return "[email protected]" }
    subject: @ts { return context.nodes.compose.output.subject }
    html: @ts { return context.nodes.compose.output.body_html }
  }

  flow {
    root -> scrape_blog
    root -> scrape_industry
    scrape_blog -> compose
    scrape_industry -> compose
    compose -> review_draft
    review_draft -> send_newsletter
  }
}

trigger on_weekly {
  schedule:weekly_newsletter -> generate_newsletter
  enabled: true
}