diff --git a/CHANGELOG.md b/CHANGELOG.md
index eef46588432..76dec664922 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -41,6 +41,7 @@ Docs: https://docs.openclaw.ai
 
 ### Fixes
 
+- Release validation: install the cross-OS TypeScript harness through Windows-safe Node/npm shims so native Windows package checks reach the OpenClaw smoke suites instead of exiting before artifact capture. Thanks @vincentkoc.
 - Agents/bootstrap: keep pending `BOOTSTRAP.md` and bootstrap truncation notices in system-prompt Project Context instead of copying setup text or raw warning diagnostics into WebChat user/runtime context. Fixes #76946.
 - Channels/WhatsApp: allow `@whiskeysockets/libsignal-node` in `onlyBuiltDependencies` so pnpm v9+ `blockExoticSubdeps` no longer rejects the baileys git-tarball subdep and silences all inbound agent replies. Fixes #76539. Thanks @ottodeng and @vincentkoc.
 - Gateway/install: keep `.env`-managed values in the macOS LaunchAgent env file while still tracking `OPENCLAW_SERVICE_MANAGED_ENV_KEYS`, so regenerated services do not boot without managed auth/provider keys. Fixes #75374.
diff --git a/scripts/github/run-openclaw-cross-os-release-checks.sh b/scripts/github/run-openclaw-cross-os-release-checks.sh
index 2025b39091f..c377fc492ff 100755
--- a/scripts/github/run-openclaw-cross-os-release-checks.sh
+++ b/scripts/github/run-openclaw-cross-os-release-checks.sh
@@ -15,6 +15,19 @@ if ! command -v node >/dev/null 2>&1 || ! command -v npm >/dev/null 2>&1; then
   fi
 fi
 
+node_cmd="node"
+npm_cmd="npm"
+if command -v cygpath >/dev/null 2>&1; then
+  if command -v node.exe >/dev/null 2>&1; then
+    node_cmd="node.exe"
+  fi
+  if command -v npm.cmd >/dev/null 2>&1; then
+    npm_cmd="npm.cmd"
+  elif command -v npm.exe >/dev/null 2>&1; then
+    npm_cmd="npm.exe"
+  fi
+fi
+
 temp_root="${OPENCLAW_RELEASE_TSX_TOOL_ROOT:-${RUNNER_TEMP:-${TMPDIR:-/tmp}}}"
 if command -v cygpath >/dev/null 2>&1; then
   temp_root="$(cygpath -u "${temp_root}")"
@@ -22,27 +35,34 @@ fi
 
 tool_dir="${OPENCLAW_RELEASE_TSX_TOOL_DIR:-${temp_root}/openclaw-release-tsx-${tsx_version}}"
 loader_path="${tool_dir}/node_modules/tsx/dist/loader.mjs"
+npm_tool_dir="${tool_dir}"
+if command -v cygpath >/dev/null 2>&1; then
+  npm_tool_dir="$(cygpath -w "${tool_dir}")"
+fi
 
-command -v node >/dev/null 2>&1 || {
+command -v "${node_cmd}" >/dev/null 2>&1 || {
   echo "node is required to run cross-OS release checks." >&2
   exit 127
 }
-command -v npm >/dev/null 2>&1 || {
+command -v "${npm_cmd}" >/dev/null 2>&1 || {
   echo "npm is required to install the cross-OS release-check loader." >&2
   exit 127
 }
 
 if [[ ! -f "${loader_path}" ]]; then
   mkdir -p "${tool_dir}"
-  npm install --prefix "${tool_dir}" --no-save --no-package-lock "tsx@${tsx_version}" >/dev/null
+  if ! "${npm_cmd}" install --prefix "${npm_tool_dir}" --no-save --no-package-lock "tsx@${tsx_version}" >/dev/null; then
+    echo "failed to install cross-OS release-check loader with ${npm_cmd}." >&2
+    exit 127
+  fi
 fi
 
 loader_url="$(
-  node -e '
+  "${node_cmd}" -e '
     const { resolve } = require("node:path");
     const { pathToFileURL } = require("node:url");
     process.stdout.write(pathToFileURL(resolve(process.argv[1])).href);
   ' "${loader_path}"
 )"
 
-exec node --import "${loader_url}" "${script_path}" "$@"
+exec "${node_cmd}" --import "${loader_url}" "${script_path}" "$@"
diff --git a/test/scripts/openclaw-cross-os-release-workflow.test.ts b/test/scripts/openclaw-cross-os-release-workflow.test.ts
index 649790ebf65..fb5c42ee286 100644
--- a/test/scripts/openclaw-cross-os-release-workflow.test.ts
+++ b/test/scripts/openclaw-cross-os-release-workflow.test.ts
@@ -2,6 +2,7 @@ import { readFileSync } from "node:fs";
 import { describe, expect, it } from "vitest";
 
 const WORKFLOW_PATH = ".github/workflows/openclaw-cross-os-release-checks-reusable.yml";
+const WRAPPER_PATH = "scripts/github/run-openclaw-cross-os-release-checks.sh";
 const HARNESS = "bash workflow/scripts/github/run-openclaw-cross-os-release-checks.sh";
 
 describe("cross-OS release checks workflow", () => {
@@ -11,4 +12,13 @@ describe("cross-OS release checks workflow", () => {
     expect(workflow).toContain(HARNESS);
     expect(workflow).not.toContain('pnpm dlx "tsx@${TSX_VERSION}"');
   });
+
+  it("uses Windows-safe npm resolution for the TypeScript loader bootstrap", () => {
+    const wrapper = readFileSync(WRAPPER_PATH, "utf8");
+
+    expect(wrapper).toContain("command -v npm.cmd");
+    expect(wrapper).toContain('npm_tool_dir="$(cygpath -w "${tool_dir}")"');
+    expect(wrapper).toContain('"${npm_cmd}" install --prefix "${npm_tool_dir}"');
+    expect(wrapper).toContain('exec "${node_cmd}" --import "${loader_url}"');
+  });
 });