Function grok_acp_agent_spec 

pub fn grok_acp_agent_spec() -> AgentSpec

Grok registered over ACP against the same synthetic peer as acp_agent_spec, but bound to the real grok adapter ID (agent ID equal to GROK_ACP_FIXTURE_ID, i.e. the catalog’s own grok agent ID).

Proves that a Register command for grok over TransportKind::Acp clears the kernel’s transport-support check and reaches spawn, without depending on a live, authenticated grok CLI on the test box.