diff --git a/package.json b/package.json
index 80af3c815bf..a30418562d6 100644
--- a/package.json
+++ b/package.json
@@ -1139,7 +1139,7 @@
     "canon:check:json": "node scripts/canon.mjs check --json",
     "canon:enforce": "node scripts/canon.mjs enforce --json",
     "canvas:a2ui:bundle": "node scripts/bundle-a2ui.mjs",
-    "check": "pnpm check:no-conflict-markers && pnpm tool-display:check && pnpm check:host-env-policy:swift && pnpm tsgo && pnpm lint && pnpm lint:webhook:no-low-level-body-read && pnpm lint:auth:no-pairing-store-group && pnpm lint:auth:pairing-account-scope && pnpm check:import-cycles && pnpm check:madge-import-cycles && node scripts/prepare-extension-package-boundary-artifacts.mjs",
+    "check": "pnpm check:no-conflict-markers && pnpm tool-display:check && pnpm check:host-env-policy:swift && pnpm tsgo && pnpm lint && pnpm lint:webhook:no-low-level-body-read && pnpm lint:auth:no-pairing-store-group && pnpm lint:auth:pairing-account-scope && pnpm check:import-cycles && pnpm check:madge-import-cycles",
     "check:base-config-schema": "node --import tsx scripts/generate-base-config-schema.ts --check",
     "check:bundled-channel-config-metadata": "node --import tsx scripts/generate-bundled-channel-config-metadata.ts --check",
     "check:docs": "pnpm format:docs:check && pnpm lint:docs && pnpm docs:check-i18n-glossary && pnpm docs:check-links",
diff --git a/test/scripts/run-oxlint.test.ts b/test/scripts/run-oxlint.test.ts
index 461a3364e3c..03243f5cb5a 100644
--- a/test/scripts/run-oxlint.test.ts
+++ b/test/scripts/run-oxlint.test.ts
@@ -1,3 +1,4 @@
+import { readFileSync } from "node:fs";
 import { describe, expect, it } from "vitest";
 import { shouldPrepareExtensionPackageBoundaryArtifacts } from "../../scripts/run-oxlint.mjs";
 
@@ -14,4 +15,15 @@ describe("run-oxlint", () => {
     expect(shouldPrepareExtensionPackageBoundaryArtifacts(["--print-config"])).toBe(false);
     expect(shouldPrepareExtensionPackageBoundaryArtifacts(["--rules"])).toBe(false);
   });
+
+  it("does not run package-boundary artifact prep twice in pnpm check", () => {
+    const packageJson = JSON.parse(readFileSync("package.json", "utf8")) as {
+      scripts: Record<string, string>;
+    };
+
+    expect(packageJson.scripts.check).toContain("pnpm lint");
+    expect(packageJson.scripts.check).not.toContain(
+      "node scripts/prepare-extension-package-boundary-artifacts.mjs",
+    );
+  });
 });