feat(#2569): merge harness-local todos into get_loose_ends

hive-agent-mcp/src/mcp/render.rs

@@ -297,6 +297,30 @@ pub(super) async fn matrix_unread_summary() -> Option<Vec<MatrixRoomUnread>> {
     serde_json::from_value(serde_json::Value::Array(arr.clone())).ok()
 }
 
+/// Query the harness's in-agent socket for this agent's local todos
+/// (loose-ends v2). Returns `None` when `HIVE_AGENT_SOCKET` is unset /
+/// absent or the query fails — best-effort, like [`matrix_unread_summary`],
+/// so an agent without the socket is not penalised.
+pub(super) async fn local_todos() -> Option<Vec<hive_sh4re::LooseEnd>> {
+    use tokio::io::{AsyncBufReadExt, AsyncWriteExt, BufReader};
+    use tokio::net::UnixStream;
+    let socket = std::env::var_os("HIVE_AGENT_SOCKET").map(std::path::PathBuf::from)?;
+    if !socket.exists() {
+        return None;
+    }
+    let mut stream = UnixStream::connect(&socket).await.ok()?;
+    let mut req =
+        serde_json::to_string(&hive_agent_sock::Request::ListTodos { subsystem: None }).ok()?;
+    req.push('\n');
+    stream.write_all(req.as_bytes()).await.ok()?;
+    let mut lines = BufReader::new(stream).lines();
+    let line = lines.next_line().await.ok()??;
+    match serde_json::from_str::<hive_agent_sock::Response>(&line).ok()? {
+        hive_agent_sock::Response::LooseEnds { loose_ends } => Some(loose_ends),
+        _ => None,
+    }
+}
+
 /// Format a `Vec<MatrixRoomUnread>` into a per-room summary string.
 /// Single room / single message collapses to one line; multi-room
 /// expands to a bulleted list. Returns an empty string for empty input.