connection statuses

cmd/ollie-9p/main.go

@@ -58,10 +58,15 @@ func main() {
 
 	switch cmd {
 	case "read":
-		if len(args) != 1 {
-			fatalf("usage: ollie-9p read path")
+		openMarker := false
+		if len(args) == 2 && args[0] == "--open-marker" {
+			openMarker = true
+			args = args[1:]
 		}
-		cmdRead(args[0])
+		if len(args) != 1 {
+			fatalf("usage: ollie-9p read [--open-marker] path")
+		}
+		cmdRead(args[0], openMarker)
 	case "write":
 		if len(args) != 1 {
 			fatalf("usage: ollie-9p write path")
@@ -164,13 +169,19 @@ func getuser() string {
 	return "none"
 }
 
-func cmdRead(path string) {
+func cmdRead(path string, openMarker bool) {
 	fsys := dial()
 	fid, err := fsys.Open(path, plan9.OREAD)
 	if err != nil {
 		fatalf("open %s: %v", path, err)
 	}
 	defer fid.Close()
+	// This marker is emitted only after the remote 9P open succeeds. It lets
+	// connection-aware GUI clients distinguish an opened operation from a
+	// merely started local helper process.
+	if openMarker {
+		fmt.Fprintln(os.Stderr, "OLLIE_9P_OPEN")
+	}
 	if _, err := io.Copy(os.Stdout, fid); err != nil {
 		fatalf("read %s: %v", path, err)
 	}

fs/agentfiles.go

@@ -110,6 +110,18 @@ func listAgents(ctx HandlerCtx) ([]FsNodeDecl, error) {
 				}),
 			),
 
+			// connection — agent execution environment connectivity. Opening this
+			// file performs a lightweight RPC against the session tool server.
+			Leaf("connection", 0444, Read(func(_ HandlerCtx) ([]byte, error) {
+				if s.toolsConn == nil {
+					return nil, fmt.Errorf("agent tool server unavailable")
+				}
+				if _, err := s.toolsConn.ListTools(); err != nil {
+					return nil, err
+				}
+				return []byte("connected\n"), nil
+			})),
+
 			// state — current agent state
 			Leaf("state", 0444, Read(func(_ HandlerCtx) ([]byte, error) {
 				return []byte(a.State() + "\n"), nil

kde

@@ -1 +1 @@
-Subproject commit c983e2bb6af6769f9dd4b757bf449abbf2f2b066
+Subproject commit 6e7245dd993f7db2f3a0dd51fb77391f9fa72664