Installation

Requirements

• Ruby 3.2 or higher (tested on Ruby 4.0)
• Bundler 2.x

Gemfile

gem "simple_a2a"

Then run:

bundle install

Direct install

gem install simple_a2a

Dependencies

simple_a2a pulls in the following gems automatically:

Gem	Purpose
async	Async fiber runtime
async-http	Non-blocking HTTP client (used by Client::Base and Client::SSE)
falcon	Async-native Rack HTTP server
roda	Rack router for the server endpoint
rack	WSGI-style Ruby web interface
zeitwerk	Autoloading
jwt	RS256 JWT signing for push notification webhooks
logger	Ruby standard logger (bundled gem in Ruby 4.0+)
simple_flow	Pipeline composition for executor chains
typed_bus	Per-task SSE event fan-out

Verifying the install

require "simple_a2a"
puts A2A::VERSION   # => "0.1.0"