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a2a-protocol

How agent-native apps discover, authenticate with, and call each other over A2A. Use when connecting one app to another, debugging a remote agent that won't authenticate, exposing skills to peers, or calling agents from scripts.

templates/dispatch/.agents/skills/a2a-protocol/SKILL.md

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# A2A Protocol (Agent-to-Agent)

## Rule

Agents call other agents over A2A, a JSON-RPC protocol for discovery and
delegation. Use it only when the user explicitly asks to involve a peer, or
the requested outcome requires data, credentials, or a capability owned by
that peer and unavailable through the local app's actions. The local app's
actions are the default; a peer's availability or ability to enrich a result
is not enough. When a peer supplies input, keep authoring and editing artifacts
native to the local app here.

When a handoff qualifies under the rule above, preserve the peer boundary: do
not have app A generate and execute raw SQL against app B's database, or expose