From 111aeb2c4fd83962661182541d6d88e0d6917b2d Mon Sep 17 00:00:00 2001
From: Peter Steinberger <steipete@gmail.com>
Date: Mon, 19 Jan 2026 05:42:42 +0000
Subject: [PATCH] fix: cover sync ui spawn on Windows (#1212) (thanks
 @longmaba)

---
 CHANGELOG.md  | 1 +
 scripts/ui.js | 1 +
 2 files changed, 2 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 841bae53f..c80584414 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,7 @@ Docs: https://docs.clawd.bot
 - TUI: add syntax highlighting for code blocks. (#1200) — thanks @vignesh07.
 
 ### Fixes
+- UI: enable shell mode for sync Windows spawns to avoid `pnpm ui:build` EINVAL. (#1212) — thanks @longmaba.
 - Plugins: surface plugin load/register/config errors in gateway logs with plugin/source context.
 - Agents: propagate accountId into embedded runs so sub-agent announce routing honors the originating account. (#1058)
 - Compaction: include tool failure summaries in safeguard compaction to prevent retry loops. (#1084)
diff --git a/scripts/ui.js b/scripts/ui.js
index 4aff8e20b..16ad6b0c2 100644
--- a/scripts/ui.js
+++ b/scripts/ui.js
@@ -68,6 +68,7 @@ function runSync(cmd, args, envOverride) {
     cwd: uiDir,
     stdio: "inherit",
     env: envOverride ?? process.env,
+    shell: process.platform === "win32",
   });
   if (result.signal) process.exit(1);
   if ((result.status ?? 1) !== 0) process.exit(result.status ?? 1);