Daily News Digest

/**
 * Fetches top stories daily, summarizes them with AI,
 * and emails a digest.
 */

schedule morning_digest {
  label: "Morning Digest"
  cron: "0 7 * * *"
  timezone: "America/New_York"
}

graph build_digest {
  label: "Build Daily Digest"

  root {
    type: code
    label: "Start"
    code: @ts { return { timestamp: new Date().toISOString() } }
    outputSchema: @json {
      {
        "type": "object",
        "properties": {
          "timestamp": { "type": "string" }
        }
      }
    }
  }

  node fetch_tech {
    type: http
    label: "Fetch tech news"
    url: @ts { return "https://hacker-news.firebaseio.com/v0/topstories.json?limitToFirst=10&orderBy=%22$key%22" }
  }

  node fetch_stories {
    type: code
    label: "Extract story IDs"
    code: @ts {
      const ids = context.nodes.fetch_tech.output
      return { ids: Array.isArray(ids) ? ids.slice(0, 5) : [] }
    }
  }

  node summarize {
    type: ai
    label: "Summarize headlines"
    kind: text
    model: "google/gemini-2.5-flash"
    prompt: @ts {
      return "Write a brief daily tech news digest intro paragraph based on today being " + context.nodes.root.output.timestamp + ". Keep it to 3-4 sentences highlighting that these are the top stories from Hacker News today."
    }
    temperature: 0.7
  }

  node send_digest {
    type: resend
    label: "Send digest email"
    from: @ts { return "[email protected]" }
    to: @ts { return "[email protected]" }
    subject: @ts {
      const d = new Date(context.nodes.root.output.timestamp)
      return "Daily Tech Digest - " + d.toLocaleDateString()
    }
    text: @ts { return context.nodes.summarize.output }
  }

  flow {
    root -> fetch_tech
    fetch_tech -> fetch_stories
    fetch_stories -> summarize
    summarize -> send_digest
  }
}

trigger daily_trigger {
  schedule:morning_digest -> build_digest
  enabled: true
}