a2a

name	a2a
description	Agent-to-Agent protocol bridge for Ouroboros. Provides a local A2A-compatible server plus client tools for discovering and messaging other A2A agents.
version	1.0.0
type	extension
entry	plugin.py
permissions	["net","tool","route","widget","read_settings","companion_process","inject_chat"]
env_from_settings	[]
when_to_use	User asks to communicate with another A2A-compatible agent, discover an agent card, send an A2A message, check A2A task status, or expose this Ouroboros instance as an A2A peer.
timeout_sec	120
install_specs	[{"kind":"pip","package":"protobuf<6"},{"kind":"pip","package":"a2a-sdk[http-server]>=1.0.0,<2.0.0"}]
companion_processes	[{"name":"a2a_server","command":["python3","scripts/a2a_daemon.py"],"runtime":"python3","restart_policy":"on_failure"}]

A2A skill

This skill moves Ouroboros's Agent-to-Agent protocol support out of the core runtime. It exposes a small local A2A-compatible JSON-RPC server and registers three client tools:

• discover — fetch another agent's Agent Card.
• send — send a message to another A2A agent.
• status — check a remote task status.

The companion process talks back to the host through the loopback Host Service API using the reviewed SkillToken grant. It does not patch the core runtime and stores task state under the skill state directory.