Summary

Bumps @lydell/node-pty (and its per-platform packages) from 1.2.0-beta.10 → 1.2.0-beta.12 to fix the repeated Windows desktop sidecar crash / stderr flood reported in #29599.

Root cause (reproduced headlessly on Windows, node v24.14.1)

The desktop sidecar resolves @lydell/node-pty to @lydell/node-pty-win32-x64 (via electron.vite.config.ts). On every PTY kill(), node-pty's WindowsPtyAgent does child_process.fork('conpty_console_list_agent'), and in beta.10 that agent calls getConsoleProcessList(shellPid) with no error handling:

// @lydell/node-pty-win32-x64@1.2.0-beta.10/lib/conpty_console_list_agent.js
var consoleProcessList = getConsoleProcessList(shellPid); // line 13 — throws uncaught

kill() forks this agent and then synchronously kills the pty, so by the time the agent runs AttachConsole(shellPid) the shell is already gone (and the Electron utilityProcess has no console at all) → native throws Error: AttachConsole failed → the forked process exits with the stack dumped to stderr, which the desktop surfaces as sidecar stderr {...}. This matches the issue's "Error 1" line-for-line and fires on every terminal close (reproduced 40/40, including in a detached no-console process).

Fix

@lydell/node-pty@1.2.0-beta.12 carries the upstream fix that wraps the call in try/catch and guards innerPid <= 0:

// beta.12
var consoleProcessList = [];
if (shellPid > 0) {
  try { consoleProcessList = getConsoleProcessList(shellPid); }
  catch (_a) { consoleProcessList = []; } // AttachConsole can fail if the process already exited or is invalid.
}

Verified locally: after the bump, spawning + killing a PTY produces no AttachConsole failed output.

Changes

• package.json — catalog @lydell/node-pty → 1.2.0-beta.12
• packages/desktop/package.json — the 6 @lydell/node-pty-<platform> optional deps → 1.2.0-beta.12
• bun.lock — regenerated
• packages/opencode/src/pty/pty.node.ts — drop the now-redundant @ts-expect-error on the @lydell/node-pty import (beta.12 ships node-pty.d.ts, so the directive became unused → TS2578)

Notes / not addressed here

• The same forked agent still flashes a console window per terminal close (node-pty's fork has no windowsHide); beta.12 reduces but doesn't fully remove this.
• This bump stops the crash/stderr flood. Sidecar supervision/auto-restart (so a sidecar crash doesn't leave the renderer permanently on net::ERR_FAILED / "fetch failed") is a separate follow-up in packages/desktop/src/main/index.ts.

Refs #29599