perf(plugins): skip fresh boundary dts prep

test/scripts/prepare-extension-package-boundary-artifacts.test.ts

@@ -1,9 +1,22 @@
-import { describe, expect, it } from "vitest";
+import fs from "node:fs";
+import os from "node:os";
+import path from "node:path";
+import { afterEach, describe, expect, it } from "vitest";
 import {
   createPrefixedOutputWriter,
+  isArtifactSetFresh,
   runNodeStepsInParallel,
 } from "../../scripts/prepare-extension-package-boundary-artifacts.mjs";
 
+const tempRoots = new Set<string>();
+
+afterEach(() => {
+  for (const rootDir of tempRoots) {
+    fs.rmSync(rootDir, { force: true, recursive: true });
+  }
+  tempRoots.clear();
+});
+
 describe("prepare-extension-package-boundary-artifacts", () => {
   it("prefixes each completed line and flushes the trailing partial line", () => {
     let output = "";
@@ -40,4 +53,36 @@ describe("prepare-extension-package-boundary-artifacts", () => {
 
     expect(Date.now() - startedAt).toBeLessThan(2_000);
   });
+
+  it("treats artifacts as fresh only when outputs are newer than inputs", () => {
+    const rootDir = fs.mkdtempSync(path.join(os.tmpdir(), "openclaw-boundary-prep-"));
+    tempRoots.add(rootDir);
+    const inputPath = path.join(rootDir, "src", "demo.ts");
+    const outputPath = path.join(rootDir, "dist", "demo.tsbuildinfo");
+    fs.mkdirSync(path.dirname(inputPath), { recursive: true });
+    fs.mkdirSync(path.dirname(outputPath), { recursive: true });
+    fs.writeFileSync(inputPath, "export const demo = 1;\n", "utf8");
+    fs.writeFileSync(outputPath, "ok\n", "utf8");
+
+    fs.utimesSync(inputPath, new Date(1_000), new Date(1_000));
+    fs.utimesSync(outputPath, new Date(2_000), new Date(2_000));
+
+    expect(
+      isArtifactSetFresh({
+        rootDir,
+        inputPaths: ["src"],
+        outputPaths: ["dist/demo.tsbuildinfo"],
+      }),
+    ).toBe(true);
+
+    fs.utimesSync(inputPath, new Date(3_000), new Date(3_000));
+
+    expect(
+      isArtifactSetFresh({
+        rootDir,
+        inputPaths: ["src"],
+        outputPaths: ["dist/demo.tsbuildinfo"],
+      }),
+    ).toBe(false);
+  });
 });