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Connect to Gmail and let SirenSpec triage your inbox. A Python tool fetches the most recent unread message, then a swrm runs three classifiers simultaneously — urgency score, intent label, and sender reputation. The synthesis agent combines those signals into a routing decision, and conditional edges send the workflow to whichever response agent fits: draft a reply, write a forwarding note, or generate an archive reason.

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What it demonstrates

  • python tool node making authenticated multi-step API calls
  • swrm running three parallel classifiers on the same input
  • Synthesis agent combining swrm outputs into a single routing decision
  • Conditional edges routing on working.triage.output
  • pii guardrail protecting email content throughout

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Prerequisites

Obtain a Gmail OAuth 2.0 access token with gmail.readonly scope: 
export GMAIL_ACCESS_TOKEN=ya29...
The email_fetcher module lives alongside the workflow: 
export PYTHONPATH=docs/cookbook/email-triage

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Run it

PYTHONPATH=docs/cookbook/email-triage \
  sirenspec run docs/cookbook/email-triage/workflow.yaml

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Workflow

docs/cookbook/email-triage/workflow.yaml
version: "0.1"

agents:
  drafter:
    model: "anthropic:claude-haiku-4-5-20251001"
    system: |
      Draft a concise, professional reply to this email in 2-3 sentences.
      Email: {{ fetch_email.email_json }}

  forwarder:
    model: "openai:gpt-4o-mini"
    system: |
      Write a single-sentence forwarding note explaining why this email
      needs attention from a team member.
      Email: {{ fetch_email.email_json }}

  archiver:
    model: "openai:gpt-4o-mini"
    system: |
      Write a one-line archive reason for this email.
      Email: {{ fetch_email.email_json }}

nodes:
  fetch_email:
    type: tool
    tool: python
    config:
      module: email_fetcher
      function: fetch_latest_unread
    output_key: email_json

  triage:
    type: swrm
    concurrency: 3
    agents:
      - id: urgency
        provider: openai
        model: gpt-4o-mini
        prompt: |
          Rate the urgency of this email from 1 (low) to 5 (critical).
          Reply with ONLY a single integer.
          Email: {{ fetch_email.email_json }}

      - id: intent
        provider: openai
        model: gpt-4o-mini
        prompt: |
          Classify the intent: action_required, fyi, question, or spam.
          Reply with ONLY one of those four words.
          Email: {{ fetch_email.email_json }}

      - id: sender
        provider: anthropic
        model: claude-haiku-4-5-20251001
        prompt: |
          Rate the sender's reputation as: trusted, neutral, or unknown.
          Reply with ONLY one of those three words.
          Email: {{ fetch_email.email_json }}

    synthesis:
      provider: openai
      model: gpt-4o-mini
      prompt: |
        Given these triage scores for an email:
          urgency (1-5): {{ triage.agents.urgency.output }}
          intent:        {{ triage.agents.intent.output }}
          sender:        {{ triage.agents.sender.output }}

        Decide the routing action. Reply with ONLY one word: reply, forward, or archive.

  draft_reply:
    agent: drafter
    writes: output.draft

  forward_note:
    agent: forwarder
    writes: output.forward

  archive_reason:
    agent: archiver
    writes: output.archive

edges:
  - from: fetch_email
    to: triage
  - from: triage
    to: draft_reply
    when: working.triage.output == "reply"
  - from: triage
    to: forward_note
    when: working.triage.output == "forward"
  - from: triage
    to: archive_reason
    when: working.triage.output == "archive"

guardrails:
  - injection
  - pii

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How data flows

  1. fetch_email calls email_fetcher.fetch_latest_unread(), which returns a JSON string with from, subject, and snippet.
  2. triage fans out to three agents simultaneously. Each reads {{ fetch_email.email_json }} and produces a single score word.
  3. The synthesis agent combines all three signals and outputs one of reply, forward, or archive.
  4. The synthesis output is written to working.triage.output. Conditional edges route to exactly one of draft_reply, forward_note, or archive_reason.

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Graph

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Next steps

Market Analysis

Swrm of specialist analysts with a synthesis agent — the core parallel pattern.

Conditional Pipeline

Simpler conditional routing without swrm.