// Agent-to-Agent protocol bridge for Ouroboros. Provides a local A2A-compatible server plus client tools for discovering and messaging other A2A agents.
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| 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"}] |
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.