fix: respond to PTY cursor queries

CHANGELOG.md

@@ -24,6 +24,7 @@
 - Tools: default `exec` exit notifications and auto-migrate legacy `tools.bash` to `tools.exec`.
 - Tools: add tmux-style `process send-keys` and bracketed paste helpers for PTY sessions.
 - Tools: add `process submit` helper to send CR for PTY sessions.
+- Tools: respond to PTY cursor position queries to unblock interactive TUIs.
 - Status: trim `/status` to current-provider usage only and drop the OAuth/token block.
 - Directory: unify `clawdbot directory` across channels and plugin channels.
 - UI: allow deleting sessions from the Control UI.

src/agents/bash-tools.exec.ts

@@ -29,6 +29,7 @@ import {
   truncateMiddle,
 } from "./bash-tools.shared.js";
 import { getShellConfig, sanitizeBinaryOutput } from "./shell-utils.js";
+import { buildCursorPositionResponse, stripDsrRequests } from "./pty-dsr.js";
 
 const DEFAULT_MAX_OUTPUT = clampNumber(
   readEnvInt("PI_BASH_MAX_OUTPUT_CHARS"),
@@ -451,7 +452,17 @@ export function createExecTool(
       };
 
       if (pty) {
-        pty.onData(handleStdout);
+        const cursorResponse = buildCursorPositionResponse();
+        pty.onData((data) => {
+          const raw = data.toString();
+          const { cleaned, requests } = stripDsrRequests(raw);
+          if (requests > 0) {
+            for (let i = 0; i < requests; i += 1) {
+              pty.write(cursorResponse);
+            }
+          }
+          handleStdout(cleaned);
+        });
       } else if (child) {
         child.stdout.on("data", handleStdout);
         child.stderr.on("data", handleStderr);

src/agents/pty-dsr.test.ts

@@ -0,0 +1,15 @@
+import { expect, test } from "vitest";
+
+import { buildCursorPositionResponse, stripDsrRequests } from "./pty-dsr.js";
+
+test("stripDsrRequests removes cursor queries and counts them", () => {
+  const input = "hi\x1b[6nthere\x1b[?6n";
+  const { cleaned, requests } = stripDsrRequests(input);
+  expect(cleaned).toBe("hithere");
+  expect(requests).toBe(2);
+});
+
+test("buildCursorPositionResponse returns CPR sequence", () => {
+  expect(buildCursorPositionResponse()).toBe("\x1b[1;1R");
+  expect(buildCursorPositionResponse(12, 34)).toBe("\x1b[12;34R");
+});

src/agents/pty-dsr.ts

@@ -0,0 +1,14 @@
+const DSR_PATTERN = /\x1b\[\??6n/g;
+
+export function stripDsrRequests(input: string): { cleaned: string; requests: number } {
+  let requests = 0;
+  const cleaned = input.replace(DSR_PATTERN, () => {
+    requests += 1;
+    return "";
+  });
+  return { cleaned, requests };
+}
+
+export function buildCursorPositionResponse(row = 1, col = 1): string {
+  return `\x1b[${row};${col}R`;
+}