fix(ci): clean check-changed pnpm shim temp dirs

scripts/check-changed.mjs

@@ -1,4 +1,12 @@
-import { accessSync, chmodSync, constants, existsSync, mkdtempSync, writeFileSync } from "node:fs";
+import {
+  accessSync,
+  chmodSync,
+  constants,
+  existsSync,
+  mkdtempSync,
+  rmSync,
+  writeFileSync,
+} from "node:fs";
 import { tmpdir } from "node:os";
 import path from "node:path";
 import { performance } from "node:perf_hooks";
@@ -36,6 +44,7 @@ const LINTABLE_CORE_PATH_RE = /^(?:src|ui|packages)\/.+\.[cm]?[jt]sx?$/u;
 const CORE_LINT_OPTIMIZATION_NEUTRAL_PATH_RE =
   /^(?:scripts|test\/scripts)\/|^\.github\/workflows\/ci\.yml$/u;
 let corepackPnpmShimDir;
+let corepackPnpmShimCleanupRegistered = false;
 
 export function createChangedCheckChildEnv(baseEnv = process.env) {
   const resolvedBaseEnv = resolveLocalHeavyCheckEnv(baseEnv);
@@ -464,9 +473,27 @@ function ensureCorepackPnpmShimDir() {
   chmodSync(pnpmPath, 0o755);
   writeFileSync(path.join(dir, "pnpm.cmd"), "@echo off\r\ncorepack pnpm %*\r\n", "utf8");
   corepackPnpmShimDir = dir;
+  registerCorepackPnpmShimCleanup();
   return dir;
 }
 
+function registerCorepackPnpmShimCleanup() {
+  if (corepackPnpmShimCleanupRegistered) {
+    return;
+  }
+  corepackPnpmShimCleanupRegistered = true;
+  process.once("exit", cleanupCorepackPnpmShimDir);
+}
+
+export function cleanupCorepackPnpmShimDir() {
+  if (!corepackPnpmShimDir) {
+    return;
+  }
+  const dir = corepackPnpmShimDir;
+  corepackPnpmShimDir = undefined;
+  rmSync(dir, { recursive: true, force: true });
+}
+
 async function runCommand(command, timings) {
   const startedAt = performance.now();
   console.error(`\n[check:changed] ${command.name}`);

test/scripts/changed-lanes.test.ts

@@ -1,5 +1,5 @@
 import { execFileSync, spawnSync } from "node:child_process";
-import { mkdirSync, unlinkSync, writeFileSync } from "node:fs";
+import { existsSync, mkdirSync, unlinkSync, writeFileSync } from "node:fs";
 import path from "node:path";
 import { afterEach, describe, expect, it } from "vitest";
 import {
@@ -11,6 +11,7 @@ import {
 } from "../../scripts/changed-lanes.mjs";
 import {
   buildChangedCheckCrabboxArgs,
+  cleanupCorepackPnpmShimDir,
   createChangedCheckChildEnv,
   createChangedCheckPlan,
   createPnpmManagedCommand,
@@ -71,6 +72,7 @@ function parseChangedLaneOutput(output: string): {
 }
 
 afterEach(() => {
+  cleanupCorepackPnpmShimDir();
   cleanupTempDirs(tempDirs);
 });
 
@@ -228,14 +230,15 @@ describe("scripts/changed-lanes", () => {
     mkdirSync(path.join(dir, "src"), { recursive: true });
     writeFileSync(path.join(dir, "src", "feature.ts"), "export const value = 1;\n", "utf8");
 
-    const normalPaths = listChangedPathsFromGit({ base: "origin/main", cwd: dir });
-    expect(normalPaths.length).toBeGreaterThan(200);
-    expect(normalPaths).toContain("baseline-0.txt");
-    expect(normalPaths).toContain("src/feature.ts");
-
     const previousRawSync = process.env.OPENCLAW_CHANGED_LANES_RAW_SYNC;
-    process.env.OPENCLAW_CHANGED_LANES_RAW_SYNC = "1";
+    delete process.env.OPENCLAW_CHANGED_LANES_RAW_SYNC;
     try {
+      const normalPaths = listChangedPathsFromGit({ base: "origin/main", cwd: dir });
+      expect(normalPaths.length).toBeGreaterThan(200);
+      expect(normalPaths).toContain("baseline-0.txt");
+      expect(normalPaths).toContain("src/feature.ts");
+
+      process.env.OPENCLAW_CHANGED_LANES_RAW_SYNC = "1";
       expect(listChangedPathsFromGit({ base: "origin/main", cwd: dir })).toEqual([
         "src/feature.ts",
       ]);
@@ -501,6 +504,21 @@ describe("scripts/changed-lanes", () => {
     expect(command.args).toEqual(["pnpm", "check:no-conflict-markers"]);
   });
 
+  it("cleans CI Corepack pnpm shim temp dirs", () => {
+    const command = createPnpmManagedCommand(
+      { name: "conflict markers", args: ["check:no-conflict-markers"] },
+      { CI: "1", PATH: "/usr/bin" },
+    );
+    const [shimDir] = String(command.env?.PATH ?? "").split(path.delimiter);
+
+    expect(path.basename(shimDir)).toMatch(/^openclaw-corepack-pnpm-/u);
+    expect(existsSync(path.join(shimDir, "pnpm"))).toBe(true);
+
+    cleanupCorepackPnpmShimDir();
+
+    expect(existsSync(shimDir)).toBe(false);
+  });
+
   it("keeps local changed-check children on the repo pnpm shim", () => {
     const command = createPnpmManagedCommand(
       { name: "conflict markers", args: ["check:no-conflict-markers"] },