agent: add Wake command - co-process self-wake via agent socket

hive-c0re/src/agent_server.rs

@@ -188,5 +188,20 @@ async fn dispatch(req: &AgentRequest, agent: &str, coord: &Arc<Coordinator>) ->
                 },
             }
         }
+        AgentRequest::Wake { from, body } => {
+            // Deliver a message to this agent from a co-process (e.g. a
+            // Matrix daemon). Identical to `Send { to: agent }` but the
+            // recipient is always the owning agent — no routing needed.
+            match broker.send(&Message {
+                from: from.clone(),
+                to: agent.to_owned(),
+                body: body.clone(),
+            }) {
+                Ok(()) => AgentResponse::Ok,
+                Err(e) => AgentResponse::Err {
+                    message: format!("{e:#}"),
+                },
+            }
+        }
     }
 }

hive-sh4re/src/lib.rs

@@ -218,6 +218,13 @@ pub enum AgentRequest {
         #[serde(default)]
         ttl_seconds: Option<u64>,
     },
+    /// Deliver a message TO this agent from a co-process (e.g. a Matrix
+    /// daemon running in the same container). `from` identifies the sender
+    /// (e.g. `"matrix"`); `body` is a short summary. Unlike `Send`, the
+    /// recipient is always the agent that owns this socket — no `to` field.
+    /// Wakes whatever `Recv` the harness is parked on, triggering the next
+    /// claude turn.
+    Wake { from: String, body: String },
 }
 
 /// Responses on a per-agent socket.