diff --git a/packages/cli/src/__tests__/cli.test.ts b/packages/cli/src/__tests__/cli.test.ts
index 3bd842b..1e80a7e 100644
--- a/packages/cli/src/__tests__/cli.test.ts
+++ b/packages/cli/src/__tests__/cli.test.ts
@@ -21,7 +21,7 @@ test('init, add actor, and configure write package-local SDK state', async () =>
   const manifest = JSON.parse(await readFile(join(root, 'matrix.json'), 'utf8'));
   const packageJson = JSON.parse(await readFile(join(root, 'package.json'), 'utf8'));
   assert.equal(packageJson.private, undefined);
-  assert.equal(packageJson.dependencies['@open-matrix/core'], '^0.1.0');
+  assert.equal(packageJson.dependencies['@open-matrix/sdk'], '^0.1.0');
   assert.equal(manifest.name, 'demo-package');
   assert.equal(manifest.runtime.entry, './dist/index.js');
   assert.deepEqual(manifest.runtime.factory, {
@@ -44,7 +44,7 @@ test('init, add actor, and configure write package-local SDK state', async () =>
   }]);
 
   const actorSource = await readFile(join(root, 'src', 'GreeterActor.ts'), 'utf8');
-  assert.match(actorSource, /from '@open-matrix\/core'/);
+  assert.match(actorSource, /from '@open-matrix\/sdk'/);
   const factorySource = await readFile(join(root, 'src', 'create-standalone-GreeterActor.ts'), 'utf8');
   assert.match(factorySource, /createStandaloneGreeterActor/);
   assert.match(factorySource, /runtime\.createSupervised\(GreeterActor, mount\)/);
diff --git a/packages/cli/src/cli.ts b/packages/cli/src/cli.ts
index e6ced73..408cd0a 100644
--- a/packages/cli/src/cli.ts
+++ b/packages/cli/src/cli.ts
@@ -153,7 +153,7 @@ async function initCommand(options: CommandOptions, positional: string[]): Promi
       build: 'tsc -p tsconfig.json',
     },
     dependencies: {
-      '@open-matrix/core': '^0.1.0',
+      '@open-matrix/sdk': '^0.1.0',
     },
     devDependencies: {
       typescript: '^5.7.0',
@@ -223,7 +223,7 @@ function runtimeIdToken(value: string): string {
 
 function actorFactoryTemplate(className: string, mount: string): string {
   const factoryName = `createStandalone${className}`;
-  return `import { InMemoryBroker, InMemoryTransport, MatrixRuntime } from '@open-matrix/core';
+  return `import { InMemoryBroker, InMemoryTransport, MatrixRuntime } from '@open-matrix/sdk';
 
 import { ${className} } from './${className}.js';
 
@@ -286,7 +286,7 @@ async function addActorCommand(options: CommandOptions, name: string): Promise<v
 
   readMatrixManifest(root);
   ensureDir(join(root, 'src'));
-  writeIfMissing(sourcePath, `import { MatrixActor } from '@open-matrix/core';
+  writeIfMissing(sourcePath, `import { MatrixActor } from '@open-matrix/sdk';
 
 export class ${className} extends MatrixActor {
   static accepts = {
diff --git a/scripts/prove-sdk-cli-uat.mjs b/scripts/prove-sdk-cli-uat.mjs
index 5356fbd..42f6374 100644
--- a/scripts/prove-sdk-cli-uat.mjs
+++ b/scripts/prove-sdk-cli-uat.mjs
@@ -267,6 +267,9 @@ async function main() {
         '@open-matrix/federation',
         '@open-matrix/omega-core',
         '@open-matrix/core',
+        '@open-matrix/browser-host',
+        '@open-matrix/browser-kit',
+        '@open-matrix/sdk',
       ].map((packageName) => [packageName, tarballDependencies[packageName]])
     );
 
@@ -288,7 +291,7 @@ async function main() {
 
     const authorPackagePath = path.join(authorDir, 'package.json');
     const authorPackage = JSON.parse(await readFile(authorPackagePath, 'utf8'));
-    authorPackage.dependencies['@open-matrix/core'] = tarballDependencies['@open-matrix/core'];
+    authorPackage.dependencies['@open-matrix/sdk'] = tarballDependencies['@open-matrix/sdk'];
     authorPackage.pnpm = { overrides: authorOverrides };
     await writeFile(authorPackagePath, `${JSON.stringify(authorPackage, null, 2)}\n`);
 
@@ -361,8 +364,8 @@ async function main() {
     ];
     const foundForbidden = forbidden.find((needle) => combinedAuthorFiles.includes(needle));
     if (foundForbidden) throw new Error(`Fresh author package contains forbidden dependency/path: ${foundForbidden}`);
-    if (!actorSource.includes("from '@open-matrix/core'")) {
-      throw new Error('Fresh actor source does not import @open-matrix/core');
+    if (!actorSource.includes("from '@open-matrix/sdk'")) {
+      throw new Error('Fresh actor source does not import @open-matrix/sdk');
     }
     if (!existsSync(path.join(authorDir, '.matrix', 'run.json'))) {
       throw new Error('matrix run did not write package-local .matrix/run.json');
@@ -443,8 +446,8 @@ async function main() {
       throw new Error('Generated author package is still private after package-manager install');
     }
     const installedActorSource = await readFile(path.join(installedPackageDir, 'src', 'GreeterActor.ts'), 'utf8');
-    if (!installedActorSource.includes("from '@open-matrix/core'")) {
-      throw new Error('Package-manager installed source does not keep @open-matrix/core import');
+    if (!installedActorSource.includes("from '@open-matrix/sdk'")) {
+      throw new Error('Package-manager installed source does not keep @open-matrix/sdk import');
     }
     packageRunner = spawn('pnpm', [
       'exec', 'matrix', 'run',
@@ -482,8 +485,8 @@ async function main() {
       authorDir,
       cliInstalledSeparately: true,
       authorPackageDependsOnCli: false,
-      legacyMonorepoPathReferences: false,
-      actorImport: '@open-matrix/core',
+      monorepoPathReferences: false,
+      actorImport: '@open-matrix/sdk',
       configuredKeyStored: existsSync(path.join(authorDir, '.matrix', 'credentials', 'matrix-api-key.json')),
       validKeyConfigSupplied: Boolean(liveKeyConfig),
       liveKeyValidation,