diff --git a/.changeset/deprecate-superseded-core-2.md b/.changeset/deprecate-superseded-core-2.md
new file mode 100644
index 00000000000..a845151cc84
--- /dev/null
+++ b/.changeset/deprecate-superseded-core-2.md
@@ -0,0 +1,2 @@
+---
+---
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 9abd7b80027..0e496eb50b4 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -110,6 +110,12 @@ jobs:
           SLACK_WEBHOOK_URL: ${{ secrets.SLACK_CHANGELOG_WEBHOOK_URL }}
           SLACK_WEBHOOK_TYPE: INCOMING_WEBHOOK
 
+      - name: Deprecate superseded packages
+        if: ${{ !cancelled() && steps.changesets.outputs.published == 'true' }}
+        run: node scripts/deprecate-superseded.mjs '${{ steps.changesets.outputs.publishedPackages }}'
+        env:
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
+
   # We're running the CI workflow (where node v20 modules are cached) in
   # merge_group and not on main, we need to explicitly cache node_modules here so
   # that follow-on branches can use the cached version of node_modules rather
diff --git a/scripts/deprecate-superseded.mjs b/scripts/deprecate-superseded.mjs
new file mode 100644
index 00000000000..cc257abe444
--- /dev/null
+++ b/scripts/deprecate-superseded.mjs
@@ -0,0 +1,75 @@
+import { execFileSync } from 'node:child_process';
+import fs from 'node:fs';
+import os from 'node:os';
+import path from 'node:path';
+
+const UPGRADE_GUIDE = 'https://clerk.com/docs/guides/development/upgrading/upgrade-guides/core-3';
+
+const supersededPackages = {
+  '@clerk/clerk-react': `This package is no longer supported. Please use @clerk/react instead. See the upgrade guide for more info: ${UPGRADE_GUIDE}`,
+  '@clerk/types': `This package is no longer supported. Please import types from @clerk/shared/types instead. See the upgrade guide for more info: ${UPGRADE_GUIDE}`,
+  '@clerk/clerk-expo': `@clerk/clerk-expo is deprecated. Migrate to @clerk/expo by following the Core 3 upgrade guide ${UPGRADE_GUIDE}`,
+};
+
+const { NPM_TOKEN, DRY_RUN } = process.env;
+const dryRun = DRY_RUN === '1' || DRY_RUN === 'true';
+
+const run = () => {
+  const publishedPackages = JSON.parse(process.argv[2] ?? '[]');
+  const targets = publishedPackages.filter(({ name }) => name in supersededPackages);
+
+  if (targets.length === 0) {
+    console.log('No superseded packages were published, nothing to deprecate.');
+    return;
+  }
+
+  if (!dryRun && !NPM_TOKEN) {
+    throw new Error('NPM_TOKEN is required to deprecate packages.');
+  }
+
+  const npmrc = writeUserconfig();
+  const failures = [];
+
+  for (const { name, version } of targets) {
+    const spec = `${name}@${version}`;
+    const message = supersededPackages[name];
+
+    if (dryRun) {
+      console.log(`[dry-run] npm deprecate ${spec} ${JSON.stringify(message)}`);
+      continue;
+    }
+
+    try {
+      npm(['deprecate', spec, message], npmrc);
+      const applied = npm(['view', spec, 'deprecated'], npmrc).trim();
+      if (applied !== message) {
+        throw new Error(`Expected deprecation message was not applied. Registry returned: ${JSON.stringify(applied)}`);
+      }
+      console.log(`Deprecated ${spec}`);
+    } catch (error) {
+      failures.push(`${spec}: ${error.message}`);
+    }
+  }
+
+  fs.rmSync(path.dirname(npmrc), { recursive: true, force: true });
+
+  if (failures.length > 0) {
+    throw new Error(`Failed to deprecate:\n${failures.join('\n')}`);
+  }
+};
+
+const writeUserconfig = () => {
+  const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'deprecate-superseded-'));
+  const file = path.join(dir, '.npmrc');
+  fs.writeFileSync(file, `//registry.npmjs.org/:_authToken=${NPM_TOKEN ?? ''}\n`, { mode: 0o600 });
+  return file;
+};
+
+const npm = (args, userconfig) =>
+  execFileSync('npm', args, {
+    encoding: 'utf8',
+    stdio: ['ignore', 'pipe', 'pipe'],
+    env: { ...process.env, npm_config_userconfig: userconfig },
+  });
+
+run();