google-adk-firestore-session 0.1.6

Firestore Session Manager for Google ADK

Google ADK Firestore Session

A specialized implementation of the BaseSessionService that uses Google Cloud Firestore for persisting application sessions, user states, and event logs.

Overview

This package provides the FirestoreSessionService class, which handles the lifecycle of sessions within the Google ADK (Agent Development Kit) framework. It organizes data in a hierarchical Firestore structure:

• apps/{app_name}: Global application state.
• apps/{app_name}/users/{user_id}: Persistent user-specific state.
• apps/{app_name}/users/{user_id}/sessions/{session_id}: Individual session data and state.
• apps/{app_name}/users/{user_id}/sessions/{session_id}/events/{event_id}: Historical event logs for the session.

Installation

Using pip

pip install google-adk-firestore-session

Using uv

uv add google-adk-firestore-session

Configuration

The FirestoreSessionService can be configured via constructor arguments, environment variables, or through the built-in ADK factory.

Precedence

1. Constructor Arguments: Explicit project and database passed to the class.
2. Environment Variables: GOOGLE_CLOUD_PROJECT and GOOGLE_DATABASE.
3. Default Credentials: Standard Google Cloud application default credentials.

Usage with Google ADK

To use the FirestoreSessionService with Google ADK, register the provided factory with the ADK ServiceRegistry. This allows you to point your agents to Firestore using a simple URI.

1. Register the Service

In your main entry point (e.g., serving.py), import and register the factory.

from google.adk.cli.service_registry import get_service_registry
from firestore_session import firestore_session_service_factory

# Register the "firestore" scheme
get_service_registry().register_session_service(
    "firestore", 
    firestore_session_service_factory
)

2. Configure the ADK App

Pass the URI to get_fast_api_app. The URI format is firestore://[project-id]/[database-name].

from google.adk.cli.fast_api import get_fast_api_app

app = get_fast_api_app(
    agents_dir="path/to/agents",
    # Connect to a specific project and database instance
    session_service_uri="firestore://my-project-id/my-database", 
    web=True
)

Standalone Usage

from firestore_session import FirestoreSessionService

# Explicitly passing project/database
session_service = FirestoreSessionService(
    project="my-project-id",
    database="my-database"
)

# Or use environment variables (GOOGLE_CLOUD_PROJECT, etc.)
session_service = FirestoreSessionService()

Dependencies

• google-adk: Core agent framework.
• google-cloud-firestore: Official Firestore client.

Development

Running Tests

Tests use pytest. Ensure you have a Firestore emulator or a project configured for testing.

pytest tests/