docs: enhance README with key features and add flight info extraction example

README.md

@@ -2,6 +2,7 @@
 
 [![PyPI version](https://img.shields.io/pypi/v/workflowai.svg)](https://pypi.org/project/workflowai/)
 [![License: Apache 2.0](https://img.shields.io/badge/License-Apache_2.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
+[![Python versions](https://img.shields.io/pypi/pyversions/workflowai.svg)](https://pypi.org/project/workflowai/)
 
 Official SDK from [WorkflowAI](https://workflowai.com) for Python.
 
@@ -11,17 +12,146 @@ Official SDK from [WorkflowAI](https://workflowai.com) for Python.
 
 This SDK is designed for Python teams who prefer code-first development. It provides greater control through direct code integration while still leveraging the full power of the WorkflowAI platform, complementing the web-app experience.
 
-## Installation
+## Key Features
 
-`workflowai` requires a python >= 3.9.
+- **Model-agnostic**: Works with all major AI models including OpenAI, Anthropic, Claude, Google/Gemini, Mistral, Deepseek, with a unified interface that makes switching between providers seamless. [View all supported models](https://github.com/WorkflowAI/python-sdk/blob/main/workflowai/core/domain/model.py).
+
+- **Open-source and flexible deployment**: WorkflowAI is fully open-source with flexible deployment options. Run it self-hosted on your own infrastructure for maximum data control, or use the managed [WorkflowAI Cloud](https://docs.workflowai.com/workflowai-cloud/introduction) service for hassle-free updates and automatic scaling.
+
+- **Observability integrated**: Built-in monitoring and logging capabilities that provide insights into your AI workflows, making debugging and optimization straightforward. Learn more about [observability features](https://docs.workflowai.com/concepts/runs).
+
+- **Cost tracking**: Automatically calculates and tracks the cost of each AI model run, providing transparency and helping you manage your AI budget effectively. Learn more about [cost tracking](https://docs.workflowai.com/python-sdk/agent#cost-latency).
+
+- **Type-safe**: Leverages Python's type system to catch errors at development time rather than runtime, ensuring more reliable AI applications.
+
+- **Structured output**: Uses Pydantic models to validate and structure AI responses. WorkflowAI ensures your AI responses always match your defined structure, simplifying integrations, reducing parsing errors, and making your data reliable and ready for use. Learn more about [structured input and output](https://docs.workflowai.com/python-sdk/agent#schema-input-output).
+
+- **Streaming supported**: Enables real-time streaming of AI responses for low latency applications, with immediate validation of partial outputs. Learn more about [streaming capabilities](https://docs.workflowai.com/python-sdk/agent#streaming).
+
+- **Provider fallback**: Automatically switches to alternative AI providers when the primary provider fails, ensuring high availability and reliability for your AI applications. This feature allows you to define fallback strategies that maintain service continuity even during provider outages or rate limiting.
+
+- **Built-in tools**: Comes with powerful built-in tools like web search and web browsing capabilities, allowing your agents to access real-time information from the internet. These tools enable your AI applications to retrieve up-to-date data, research topics, and interact with web content without requiring complex integrations. Learn more about [built-in tools](https://docs.workflowai.com/python-sdk/tools).
+
+- **Custom tools support**: Easily extend your agents' capabilities by creating custom tools tailored to your specific needs. Whether you need to query internal databases, call external APIs, or perform specialized calculations, WorkflowAI's tool framework makes it simple to augment your AI with domain-specific functionality. Learn more about [custom tools](https://docs.workflowai.com/python-sdk/tools#defining-custom-tools).
+
+- **Integrated with WorkflowAI**: The SDK seamlessly syncs with the WorkflowAI web application, giving you access to a powerful playground where you can edit prompts and compare models side-by-side. This hybrid approach combines the flexibility of code-first development with the visual tools needed for effective prompt engineering and model evaluation.
+
+- **Multimodality support**: Build agents that can handle multiple modalities, such as images, PDFs, documents, and audio. Learn more about [multimodal capabilities](https://docs.workflowai.com/python-sdk/multimodality).
+
+- **Caching support**: To save money and improve latency, WorkflowAI supports caching. When enabled, identical requests return cached results instead of making new API calls to AI providers. Learn more about [caching capabilities](https://docs.workflowai.com/python-sdk/agent#cache).
+
+
+
+## Get Started
+
+`workflowai` requires Python 3.9 or higher.
 
 ```sh
 pip install workflowai
 ```
 
-## Get Started
+Here's a simple example of a WorkflowAI agent that extracts structured flight information from email content:
+
+
+```python
+import asyncio
+from datetime import datetime
+from enum import Enum
+
+from pydantic import BaseModel, Field
+
+import workflowai
+from workflowai import Model
+
+# Input class
+class EmailInput(BaseModel):
+    email_content: str
+
+# Output class
+class FlightInfo(BaseModel):
+    # Enum for standardizing flight status values
+    class Status(str, Enum):
+        """Possible statuses for a flight booking."""
+        CONFIRMED = "Confirmed"
+        PENDING = "Pending"
+        CANCELLED = "Cancelled"
+        DELAYED = "Delayed"
+        COMPLETED = "Completed"
+
+    passenger: str
+    airline: str
+    flight_number: str
+    from_airport: str = Field(description="Three-letter IATA airport code for departure")
+    to_airport: str = Field(description="Three-letter IATA airport code for arrival")
+    departure: datetime
+    arrival: datetime
+    status: Status
+
+# Agent definition
+@workflowai.agent(
+    id="flight-info-extractor",
+    model=Model.GEMINI_2_0_FLASH_LATEST,
+)
+async def extract_flight_info(email_input: EmailInput) -> FlightInfo:
+    # Agent prompt
+    """
+    Extract flight information from an email containing booking details.
+    """
+    ...
+
+
+async def main():
+    email = """
+    Dear Jane Smith,
+
+    Your flight booking has been confirmed. Here are your flight details:
+
+    Flight: UA789
+    From: SFO
+    To: JFK
+    Departure: 2024-03-25 9:00 AM
+    Arrival: 2024-03-25 5:15 PM
+    Booking Reference: XYZ789
+
+    Total Journey Time: 8 hours 15 minutes
+    Status: Confirmed
+
+    Thank you for choosing United Airlines!
+    """
+    run = await extract_flight_info.run(EmailInput(email_content=email))
+    print(run)
+
+
+if __name__ == "__main__":
+    asyncio.run(main())
+
+
+# Output:
+# ==================================================
+# {
+#   "passenger": "Jane Smith",
+#   "airline": "United Airlines",
+#   "flight_number": "UA789",
+#   "from_airport": "SFO",
+#   "to_airport": "JFK",
+#   "departure": "2024-03-25T09:00:00",
+#   "arrival": "2024-03-25T17:15:00",
+#   "status": "Confirmed"
+# }
+# ==================================================
+# Cost: $ 0.00009
+# Latency: 1.18s
+# URL: https://workflowai.com/_/agents/flight-info-extractor/runs/0195ee02-bdc3-72b6-0e0b-671f0b22b3dc
+```
+> **Ready to run!** This example works straight out of the box - no tweaking needed.
+
+Agents built with `workflowai` SDK can be run in the [WorkflowAI web application](https://workflowai.com/docs/agents/flight-info-extractor/1?showDiffMode=false&show2ColumnLayout=false&taskRunId1=0195ee21-988e-7309-eb32-cd49a9b90f46&taskRunId2=0195ee21-9898-723a-0469-1458a180d3b0&taskRunId3=0195ee21-9892-72f1-ca2d-c29e18285073&versionId=fb7b29cd00031675d0c19e3d09852b27) too.
+
+[![WorkflowAI Playground](/examples/assets/web/playground-flight-info-extractor.png)](https://workflowai.com/docs/agents/flight-info-extractor/1?showDiffMode=false&show2ColumnLayout=false&taskRunId1=0195ee21-988e-7309-eb32-cd49a9b90f46&taskRunId2=0195ee21-9898-723a-0469-1458a180d3b0&taskRunId3=0195ee21-9892-72f1-ca2d-c29e18285073&versionId=fb7b29cd00031675d0c19e3d09852b27)
+
+And the runs executed via the SDK are synced with the web application.
 
-Follow the steps in our [Getting Started Guide](https://docs.workflowai.com/python-sdk/get-started).
+[![WorkflowAI Runs](/examples/assets/web/runs-flight-info-extractor.png)](https://workflowai.com/docs/agents/flight-info-extractor/1/runs?page=0)
 
 ## Documentation
 

examples/18_flight_info_extraction.py

@@ -0,0 +1,78 @@
+"""
+This example demonstrates how to create a WorkflowAI agent that extracts flight information from emails.
+It showcases:
+
+1. Using Pydantic models for structured data extraction
+2. Extracting specific details like flight numbers, dates, and times
+"""
+
+import asyncio
+from datetime import datetime
+from enum import Enum
+
+from pydantic import BaseModel, Field
+
+import workflowai
+from workflowai import Model
+
+
+class EmailInput(BaseModel):
+    """Raw email content containing flight booking details.
+    This could be a confirmation email, itinerary update, or e-ticket from any airline."""
+    email_content: str
+
+
+class FlightInfo(BaseModel):
+    """Model for extracted flight information."""
+    class Status(str, Enum):
+        """Possible statuses for a flight booking."""
+        CONFIRMED = "Confirmed"
+        PENDING = "Pending"
+        CANCELLED = "Cancelled"
+        DELAYED = "Delayed"
+        COMPLETED = "Completed"
+
+    passenger: str
+    airline: str
+    flight_number: str
+    from_airport: str = Field(description="Three-letter IATA airport code for departure")
+    to_airport: str = Field(description="Three-letter IATA airport code for arrival")
+    departure: datetime
+    arrival: datetime
+    status: Status
+
+@workflowai.agent(
+    id="flight-info-extractor",
+    model=Model.GEMINI_2_0_FLASH_LATEST,
+)
+async def extract_flight_info(email_input: EmailInput) -> FlightInfo:
+    """
+    Extract flight information from an email containing booking details.
+    """
+    ...
+
+
+async def main():
+    email = """
+    Dear Jane Smith,
+
+    Your flight booking has been confirmed. Here are your flight details:
+
+    Flight: UA789
+    From: SFO
+    To: JFK
+    Departure: 2024-03-25 9:00 AM
+    Arrival: 2024-03-25 5:15 PM
+    Booking Reference: XYZ789
+
+    Total Journey Time: 8 hours 15 minutes
+    Status: Confirmed
+
+    Thank you for choosing United Airlines!
+    """
+    run = await extract_flight_info.run(EmailInput(email_content=email))
+    print(run)
+
+
+if __name__ == "__main__":
+    asyncio.run(main())