diff --git a/.changeset/ignore-native-addons.md b/.changeset/ignore-native-addons.md
new file mode 100644
index 0000000..e15d4ed
--- /dev/null
+++ b/.changeset/ignore-native-addons.md
@@ -0,0 +1,5 @@
+---
+"@arethetypeswrong/core": patch
+---
+
+Ignore native Node.js addon (`.node`) files during package analysis.
diff --git a/packages/core/src/createPackage.ts b/packages/core/src/createPackage.ts
index 5d0864e..f323e29 100644
--- a/packages/core/src/createPackage.ts
+++ b/packages/core/src/createPackage.ts
@@ -22,7 +22,11 @@ export class Package {
     resolvedUrl?: string,
     typesPackage?: Package["typesPackage"],
   ) {
-    this.#files = files;
+    for (const path in files) {
+      if (!path.endsWith(".node")) {
+        this.#files[path] = files[path];
+      }
+    }
     this.packageName = packageName;
     this.packageVersion = packageVersion;
     this.resolvedUrl = resolvedUrl;
diff --git a/packages/core/test/createPackage.test.ts b/packages/core/test/createPackage.test.ts
new file mode 100644
index 0000000..736b750
--- /dev/null
+++ b/packages/core/test/createPackage.test.ts
@@ -0,0 +1,36 @@
+import assert from "node:assert";
+import { describe, test } from "node:test";
+import { checkPackage, Package } from "@arethetypeswrong/core";
+
+describe("Package", () => {
+  test("ignores native addons without affecting package analysis", async () => {
+    const packageRoot = "/node_modules/test";
+    const files = {
+      [`${packageRoot}/package.json`]: JSON.stringify({
+        name: "test",
+        version: "1.0.0",
+        main: "index.js",
+        types: "index.d.ts",
+      }),
+      [`${packageRoot}/index.js`]: "exports.answer = 42;",
+      [`${packageRoot}/index.d.ts`]: "export declare const answer: number;",
+      [`${packageRoot}/loader.node.js`]: "export const loadsNativeAddon = true;",
+    };
+    const packageWithoutNativeAddon = new Package(files, "test", "1.0.0");
+    const packageWithNativeAddon = new Package(
+      {
+        ...files,
+        [`${packageRoot}/build/Release/addon.node`]: new Uint8Array([0, 1, 2, 3]),
+      },
+      "test",
+      "1.0.0",
+    );
+
+    assert.strictEqual(packageWithNativeAddon.fileExists(`${packageRoot}/build/Release/addon.node`), false);
+    assert.deepStrictEqual(packageWithNativeAddon.listFiles(), packageWithoutNativeAddon.listFiles());
+    for (const path of Object.keys(files)) {
+      assert.strictEqual(packageWithNativeAddon.readFile(path), packageWithoutNativeAddon.readFile(path));
+    }
+    assert.deepStrictEqual(await checkPackage(packageWithNativeAddon), await checkPackage(packageWithoutNativeAddon));
+  });
+});