diff --git a/tools/cmd/at/main.go b/tools/cmd/at/main.go
index 6fbd0321b..4c85e72fd 100644
--- a/tools/cmd/at/main.go
+++ b/tools/cmd/at/main.go
@@ -5,6 +5,7 @@ package at
 import (
 	"bytes"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"io"
 	"os"
@@ -128,6 +129,34 @@ type rc_io_data struct {
 	send_keypresses        bool
 	string_response_is_err bool
 	timeout                time.Duration
+
+	pending_chunks [][]byte
+}
+
+func (self *rc_io_data) next_chunk(limit_size bool) (chunk []byte, err error) {
+	if len(self.pending_chunks) > 0 {
+		chunk = self.pending_chunks[0]
+		copy(self.pending_chunks, self.pending_chunks[1:])
+		self.pending_chunks = self.pending_chunks[:len(self.pending_chunks)-1]
+		return
+	}
+	block, err := self.next_block(self.rc, self.serializer)
+	if err != nil && !errors.Is(err, io.EOF) {
+		return
+	}
+	err = nil
+	const limit = 2048
+	if !limit_size || len(block) < limit {
+		chunk = block
+		return
+	}
+	chunk = block[:limit]
+	block = block[limit:]
+	for len(block) > 0 {
+		self.pending_chunks = append(self.pending_chunks, block[:limit])
+		block = block[limit:]
+	}
+	return
 }
 
 func get_response(do_io func(io_data *rc_io_data) ([]byte, error), io_data *rc_io_data) (ans *Response, err error) {
@@ -137,6 +166,9 @@ func get_response(do_io func(io_data *rc_io_data) ([]byte, error), io_data *rc_i
 			io_data.rc.Payload = nil
 			io_data.rc.CancelAsync = true
 			io_data.rc.NoResponse = true
+			io_data.next_block = func(rc *utils.RemoteControlCmd, serializer serializer_func) ([]byte, error) {
+				return serializer(rc)
+			}
 			_, err = do_io(io_data)
 		}
 		return
diff --git a/tools/cmd/at/template.go b/tools/cmd/at/template.go
index 92fcc3417..7a99686d2 100644
--- a/tools/cmd/at/template.go
+++ b/tools/cmd/at/template.go
@@ -63,7 +63,7 @@ func run_CMD_NAME(cmd *cobra.Command, args []string) (err error) {
 		timeout:                time.Duration(timeout * float64(time.Second)),
 		string_response_is_err: STRING_RESPONSE_IS_ERROR,
 		next_block: func(rc *utils.RemoteControlCmd, serializer serializer_func) ([]byte, error) {
-			return make([]byte, 0), nil
+			return serializer(rc)
 		},
 	}
 	err = create_payload_CMD_NAME(&io_data, args)
diff --git a/tools/cmd/at/tty_io.go b/tools/cmd/at/tty_io.go
index f2d80d1e5..13374b701 100644
--- a/tools/cmd/at/tty_io.go
+++ b/tools/cmd/at/tty_io.go
@@ -2,6 +2,79 @@
 
 package at
 
-func do_tty_io(io_data *rc_io_data) (serialized_response []byte, err error) {
+import (
+	"kitty/tools/tui"
+	"os"
+	"time"
+)
+
+func do_chunked_io(io_data *rc_io_data) (serialized_response []byte, err error) {
+	serialized_response = make([]byte, 0)
+	loop, err := tui.CreateLoop()
+	loop.NoAlternateScreen()
+	if err != nil {
+		return
+	}
+
+	var last_received_data_at time.Time
+
+	check_for_timeout := func(loop *tui.Loop, timer_id tui.TimerId) error {
+		if time.Now().Sub(last_received_data_at) > io_data.timeout {
+			return os.ErrDeadlineExceeded
+		}
+		return nil
+	}
+
+	transition_to_read := func() {
+		if io_data.rc.NoResponse {
+			loop.Quit(0)
+		}
+		last_received_data_at = time.Now()
+		loop.AddTimer(10*time.Millisecond, true, check_for_timeout)
+	}
+
+	loop.OnReceivedData = func(loop *tui.Loop, data []byte) error {
+		last_received_data_at = time.Now()
+		return nil
+	}
+
+	loop.OnInitialize = func(loop *tui.Loop) (string, error) {
+		chunk, err := io_data.next_chunk(true)
+		if err != nil {
+			return "", err
+		}
+		if len(chunk) == 0 {
+			transition_to_read()
+		} else {
+			loop.QueueWriteBytes(chunk)
+		}
+		return "", nil
+	}
+
+	loop.OnWriteComplete = func(loop *tui.Loop) error {
+		chunk, err := io_data.next_chunk(true)
+		if err != nil {
+			return err
+		}
+		if len(chunk) == 0 {
+			transition_to_read()
+		} else {
+			loop.QueueWriteBytes(chunk)
+		}
+		return nil
+	}
+
+	loop.OnRCResponse = func(loop *tui.Loop, raw []byte) error {
+		serialized_response = raw
+		loop.Quit(0)
+		return nil
+	}
+
+	err = loop.Run()
 	return
+
+}
+
+func do_tty_io(io_data *rc_io_data) (serialized_response []byte, err error) {
+	return do_chunked_io(io_data)
 }
diff --git a/tools/tui/loop.go b/tools/tui/loop.go
index 3cac480b4..6b0cfe449 100644
--- a/tools/tui/loop.go
+++ b/tools/tui/loop.go
@@ -3,6 +3,7 @@
 package tui
 
 import (
+	"bytes"
 	"fmt"
 	"io"
 	"kitty/tools/tty"
@@ -75,7 +76,7 @@ type Loop struct {
 
 	// Called when the terminal has been fully setup. Any string returned is sent to
 	// the terminal on shutdown
-	OnInitialize func(loop *Loop) string
+	OnInitialize func(loop *Loop) (string, error)
 
 	// Called when a key event happens
 	OnKeyEvent func(loop *Loop, event *KeyEvent) error
@@ -88,6 +89,12 @@ type Loop struct {
 
 	// Called when writing is done
 	OnWriteComplete func(loop *Loop) error
+
+	// Called when a response to an rc command is received
+	OnRCResponse func(loop *Loop, data []byte) error
+
+	// Called when any input form tty is received
+	OnReceivedData func(loop *Loop, data []byte) error
 }
 
 func (self *Loop) update_screen_size() error {
@@ -146,6 +153,9 @@ func (self *Loop) handle_osc(raw []byte) error {
 }
 
 func (self *Loop) handle_dcs(raw []byte) error {
+	if self.OnRCResponse != nil && bytes.HasPrefix(raw, []byte("@kitty-cmd")) {
+		return self.OnRCResponse(self, raw[len("@kitty-cmd"):])
+	}
 	return nil
 }
 
@@ -327,7 +337,10 @@ func (self *Loop) Run() (err error) {
 	self.queue_write_to_tty(self.terminal_options.SetStateEscapeCodes())
 	finalizer := ""
 	if self.OnInitialize != nil {
-		finalizer = self.OnInitialize(self)
+		finalizer, err = self.OnInitialize(self)
+		if err != nil {
+			return err
+		}
 	}
 
 	defer func() {
@@ -393,6 +406,12 @@ func (self *Loop) Run() (err error) {
 				return err
 			}
 			if num_read > 0 {
+				if self.OnReceivedData != nil {
+					err = self.OnReceivedData(self, read_buf[:num_read])
+					if err != nil {
+						return err
+					}
+				}
 				err = self.escape_code_parser.Parse(read_buf[:num_read])
 				if err != nil {
 					return err
@@ -419,6 +438,10 @@ func (self *Loop) QueueWriteString(data string) {
 	self.queue_write_to_tty([]byte(data))
 }
 
+func (self *Loop) QueueWriteBytes(data []byte) {
+	self.queue_write_to_tty(data)
+}
+
 func (self *Loop) ExitCode() int {
 	return self.exit_code
 }
diff --git a/tools/tui/password.go b/tools/tui/password.go
index 7c30696cd..9b0bad803 100644
--- a/tools/tui/password.go
+++ b/tools/tui/password.go
@@ -27,9 +27,9 @@ func ReadPassword(prompt string, kill_if_signaled bool) (password string, err er
 		return
 	}
 
-	loop.OnInitialize = func(loop *Loop) string {
+	loop.OnInitialize = func(loop *Loop) (string, error) {
 		loop.QueueWriteString(prompt)
-		return "\r\n"
+		return "\r\n", nil
 	}
 
 	loop.OnText = func(loop *Loop, text string, from_key_event bool, in_bracketed_paste bool) error {