diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c2be46b..7701f97 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,8 +17,12 @@ jobs:
       - uses: actions/setup-node@v5
         with:
           node-version-file: .nvmrc
+      - name: Test native release checks
+        run: node --test scripts/check-native-releases.test.mjs
       - run: corepack enable
       - run: yarn install --immutable
       - run: yarn typecheck
       - run: yarn test
       - run: yarn prepare
+      - name: Test Expo plugin resolution
+        run: node --test scripts/expo-plugin.test.mjs
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 80b4388..41f3795 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -23,11 +23,15 @@ jobs:
             echo "::error::Tag $GITHUB_REF_NAME does not match package.json version $version"
             exit 1
           fi
+      - name: Require published native SDKs
+        run: node scripts/check-native-releases.mjs
       - run: corepack enable
       - run: yarn install --immutable
       - run: yarn typecheck
       - run: yarn test
       - run: yarn prepare
+      - name: Test Expo plugin resolution
+        run: node --test scripts/expo-plugin.test.mjs
       # Trusted publishing is used when configured on npmjs.com; NPM_TOKEN is
       # only needed for the first publish, before the package exists.
       - run: npm publish --provenance
diff --git a/package.json b/package.json
index 45619e2..b984a6a 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@exostack/carillon-react-native",
-  "version": "0.4.1",
+  "version": "0.4.2",
   "description": "React Native bridge over the Carillon native SDKs.",
   "main": "./lib/module/index.js",
   "types": "./lib/typescript/src/index.d.ts",
@@ -10,7 +10,9 @@
       "types": "./lib/typescript/src/index.d.ts",
       "default": "./lib/module/index.js"
     },
-    "./package.json": "./package.json"
+    "./package.json": "./package.json",
+    "./app.plugin.js": "./app.plugin.js",
+    "./app.plugin": "./app.plugin.js"
   },
   "files": [
     "src",
diff --git a/scripts/check-native-releases.mjs b/scripts/check-native-releases.mjs
new file mode 100644
index 0000000..b91ed29
--- /dev/null
+++ b/scripts/check-native-releases.mjs
@@ -0,0 +1,84 @@
+import { execFile } from "node:child_process";
+import { readFile } from "node:fs/promises";
+import { promisify } from "node:util";
+import { pathToFileURL } from "node:url";
+
+export function nativeVersions(gradle, podspec) {
+  const kotlin = gradle.match(/\bsdkVersion:\s*"(\d+\.\d+\.\d+)"/)?.[1];
+  const swift = podspec.match(/\bminimumVersion:\s*"(\d+\.\d+\.\d+)"/)?.[1];
+  if (!kotlin || !swift)
+    throw new Error(
+      "Cannot read native SDK versions from the Gradle build and podspec.",
+    );
+  return { kotlin, swift };
+}
+
+export async function checkNativeReleases(
+  { kotlin, swift },
+  {
+    request = fetch,
+    listTags = (url, ref) =>
+      promisify(execFile)(
+        "git",
+        ["ls-remote", "--exit-code", "--tags", url, ref],
+        { timeout: 30_000 },
+      ),
+  } = {},
+) {
+  const ref = `refs/tags/${swift}`;
+  let tags;
+  try {
+    tags = await listTags(
+      "https://github.com/exostack/carillon-swift.git",
+      ref,
+    );
+  } catch (cause) {
+    throw new Error(
+      `Swift SDK ${swift} is not available. Publish its tag before releasing React Native.`,
+      { cause },
+    );
+  }
+  if (!tags.stdout.split("\n").some((line) => line.split("\t")[1] === ref)) {
+    throw new Error(
+      `Swift SDK ${swift} tag is missing. Publish it before releasing React Native.`,
+    );
+  }
+  // A successful publishing workflow is not enough: consumers need both artifacts on Central.
+  for (const extension of ["pom", "aar"]) {
+    const url = `https://repo.maven.apache.org/maven2/com/exostack/carillon/${kotlin}/carillon-${kotlin}.${extension}`;
+    const response = await request(url, {
+      method: "HEAD",
+      signal: AbortSignal.timeout(30_000),
+    });
+    if (!response.ok) {
+      throw new Error(
+        `Kotlin SDK ${kotlin} ${extension} is not available on Maven Central (HTTP ${response.status}). Publish it and wait for availability before releasing React Native.`,
+      );
+    }
+  }
+}
+
+if (
+  process.argv[1] &&
+  import.meta.url === pathToFileURL(process.argv[1]).href
+) {
+  try {
+    const versions = nativeVersions(
+      await readFile(
+        new URL("../android/build.gradle", import.meta.url),
+        "utf8",
+      ),
+      await readFile(
+        new URL("../CarillonReactNative.podspec", import.meta.url),
+        "utf8",
+      ),
+    );
+    await checkNativeReleases(versions);
+    console.log(
+      `Native dependencies are published: Swift ${versions.swift}, Kotlin ${versions.kotlin}.`,
+    );
+  } catch (error) {
+    console.error(error.message);
+    process.exitCode = 1;
+  }
+}
diff --git a/scripts/check-native-releases.test.mjs b/scripts/check-native-releases.test.mjs
new file mode 100644
index 0000000..6b5730f
--- /dev/null
+++ b/scripts/check-native-releases.test.mjs
@@ -0,0 +1,71 @@
+import assert from "node:assert/strict";
+import { test } from "node:test";
+import {
+  checkNativeReleases,
+  nativeVersions,
+} from "./check-native-releases.mjs";
+
+const versions = { kotlin: "0.4.0", swift: "0.4.0" };
+const listTags = async () => ({ stdout: "abcdef\trefs/tags/0.4.0\n" });
+
+test("reads each version from its consumer declaration", () => {
+  assert.deepEqual(
+    nativeVersions('sdkVersion: "0.4.0"', 'minimumVersion: "0.5.0"'),
+    { kotlin: "0.4.0", swift: "0.5.0" },
+  );
+  assert.throws(() => nativeVersions("", ""), /Cannot read/);
+});
+
+test("requires both Maven artifacts and the Swift tag", async () => {
+  const urls = [];
+  await checkNativeReleases(versions, {
+    listTags,
+    request: async (url) => {
+      urls.push(url);
+      return { ok: true };
+    },
+  });
+  assert.deepEqual(
+    urls.map((url) => url.split(".").at(-1)),
+    ["pom", "aar"],
+  );
+});
+
+for (const missing of ["pom", "aar"]) {
+  test(`blocks publication when the Maven ${missing} is missing`, async () => {
+    await assert.rejects(
+      checkNativeReleases(versions, {
+        listTags,
+        request: async (url) => ({ ok: !url.endsWith(missing), status: 404 }),
+      }),
+      /not available on Maven Central/,
+    );
+  });
+}
+
+test("blocks publication when the Swift tag is missing", async () => {
+  await assert.rejects(
+    checkNativeReleases(versions, { listTags: async () => ({ stdout: "" }) }),
+    /tag is missing/,
+  );
+});
+
+test("fails closed on network errors", async () => {
+  await assert.rejects(
+    checkNativeReleases(versions, {
+      listTags: async () => {
+        throw new Error("network");
+      },
+    }),
+    /Swift SDK/,
+  );
+  await assert.rejects(
+    checkNativeReleases(versions, {
+      listTags,
+      request: async () => {
+        throw new Error("network");
+      },
+    }),
+    /network/,
+  );
+});
diff --git a/scripts/expo-plugin.test.mjs b/scripts/expo-plugin.test.mjs
new file mode 100644
index 0000000..35949ce
--- /dev/null
+++ b/scripts/expo-plugin.test.mjs
@@ -0,0 +1,31 @@
+import assert from "node:assert/strict";
+import { createRequire } from "node:module";
+import { fileURLToPath } from "node:url";
+import { test } from "node:test";
+
+const require = createRequire(import.meta.url);
+const {
+  resolvePluginForModule,
+} = require("@expo/config-plugins/build/utils/plugin-resolver.js");
+const root = fileURLToPath(new URL("../", import.meta.url));
+const entry = fileURLToPath(new URL("../app.plugin.js", import.meta.url));
+
+test("exports the Expo plugin entry point", () => {
+  assert.equal(
+    require.resolve("@exostack/carillon-react-native/app.plugin.js"),
+    entry,
+  );
+  assert.equal(
+    typeof require("@exostack/carillon-react-native/app.plugin.js"),
+    "function",
+  );
+});
+
+test("Expo resolves the plugin by package name", () => {
+  const resolved = resolvePluginForModule(
+    root,
+    "@exostack/carillon-react-native",
+  );
+  assert.equal(resolved.filePath, entry);
+  assert.equal(resolved.isPluginFile, true);
+});