12-functions.vvm

# VVM Example 12: Functions
# Defining and using reusable functions

agent classifier(model="haiku", prompt="Classify emails by intent.")
agent responder(model="sonnet", prompt="Draft professional email responses.")
agent prioritizer(model="haiku", prompt="Assess urgency and importance.")

# Simple function
def classify_email(email):
  return @classifier `Classify this email: {email}`(email)

# Function with multiple parameters
def draft_response(email, tone):
  return @responder `Draft a {tone} response to: {email}`(pack(email, tone))

# Function that composes other functions
def process_email(email):
  # Classify first
  classification = classify_email(email)

  # Determine response tone based on classification
  if ?`complaint or frustrated customer`(classification):
    tone = "empathetic and apologetic"
  elif ?`business inquiry or sales opportunity`(classification):
    tone = "professional and enthusiastic"
  else:
    tone = "friendly and helpful"

  # Generate response
  response = draft_response(email, tone)

  return {
    original: email,
    classification: classification,
    response: response
  }

# Functions can return early for validation
def validate_and_process(email):
  if not ?`contains actual message content`(email):
    return { error: "empty_email", message: "No content to process" }

  if ?`automated bounce or out-of-office`(email):
    return { skipped: true, reason: "automated message" }

  return process_email(email)

# Process an incoming email
incoming = """
Subject: Frustrated with your service!
I've been waiting 3 weeks for my order and nobody responds to my emails.
This is unacceptable!
"""

result = validate_and_process(incoming)

export result