Summary

MicroClaw currently has subagent/session orchestration inside one runtime, but no first-class instance-to-instance agent-to-agent path. OpenClaw recently added A2A-oriented routing and messaging semantics, and we should provide a MicroClaw-native version that fits our Rust runtime and web stack.

Goal

Add a merge-ready first version of A2A support that lets one MicroClaw instance discover another instance, send a task to it over HTTP, and receive the final response back.

Scope

• Add a2a config for local identity, inbound auth, and named peers
• Expose an agent-card discovery endpoint
• Expose an authenticated inbound A2A message endpoint
• Add built-in tools for listing peers and sending work to a peer
• Regenerate generated tool/config docs
• Add tests covering config normalization, route auth, and end-to-end tool flow
• Add user-facing docs/blog for setup and usage

Notes

This should align with OpenClaw's practical A2A capability goal: controlled agent-to-agent delegation and response return, while staying idiomatic to MicroClaw's existing web and tool architecture.