diff --git a/README.md b/README.md
index 3410f36..a8b9ba0 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@
 
 This repo is the canonical hello-world template for Phlix plugin
 authors. It does almost nothing on purpose: it implements the
-`Phlix\Plugins\Contract\LifecycleInterface` contract introduced in
+`Phlix\Shared\Plugin\LifecycleInterface` contract introduced in
 Phlix Step A.4, returns a fixed greeting when asked about one
 well-known fixture path, and ships with a CI workflow plus PHPUnit
 tests so you can fork it as a starter and replace the lookup logic
diff --git a/dev-stubs/LifecycleInterface.php b/dev-stubs/LifecycleInterface.php
index ba2d617..19ff526 100644
--- a/dev-stubs/LifecycleInterface.php
+++ b/dev-stubs/LifecycleInterface.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace Phlix\Plugins\Contract;
+namespace Phlix\Shared\Plugin;
 
 use Psr\Container\ContainerInterface;
 
@@ -11,8 +11,8 @@
  *
  * Loaded by `tests/bootstrap.php` when the plugin is tested outside a
  * Phlix server checkout. Keep this file byte-compatible with the
- * canonical definition in `detain/phlix` at
- * `src/Plugins/Contract/LifecycleInterface.php`.
+ * canonical definition in `detain/phlix-shared` at
+ * `src/Plugin/LifecycleInterface.php`.
  *
  * @internal Tests only — never autoloaded into production.
  */
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index 2ccb005..5597af2 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -6,7 +6,7 @@
  * Test bootstrap for the plugin's own PHPUnit suite.
  *
  * The plugin's runtime dependency is the Phlix server, which provides
- * `Phlix\Plugins\Contract\LifecycleInterface`. In an installed plugin
+ * `Phlix\Shared\Plugin\LifecycleInterface`. In an installed plugin
  * (`var/plugins/phlix-plugin-example/`) that interface is resolved by
  * the host application's autoloader. When the plugin is tested in
  * isolation — `composer install && vendor/bin/phpunit` from this
@@ -21,6 +21,6 @@
 
 require __DIR__ . '/../vendor/autoload.php';
 
-if (!interface_exists(\Phlix\Plugins\Contract\LifecycleInterface::class)) {
+if (!interface_exists(\Phlix\Shared\Plugin\LifecycleInterface::class)) {
     require __DIR__ . '/../dev-stubs/LifecycleInterface.php';
 }