diff --git a/app/__init__.py b/app/__init__.py
index b60ed56..5e575ee 100644
--- a/app/__init__.py
+++ b/app/__init__.py
@@ -33,6 +33,7 @@ def create_app():
     from .errors import bp as errors_bp
     app.register_blueprint(errors_bp)
 
+    # Plugin auto-loader
     # Plugin auto-loader
     plugin_path = os.path.abspath(os.path.join(os.path.dirname(__file__), '..', 'plugins'))
     for plugin in os.listdir(plugin_path):
diff --git a/app/events.py b/app/events.py
new file mode 100644
index 0000000..a4ae535
--- /dev/null
+++ b/app/events.py
@@ -0,0 +1,6 @@
+# Event name definitions
+
+ON_USER_CREATED = 'on_user_created'
+ON_SUBMISSION_SAVED = 'on_submission_saved'
+ON_PLANT_TRANSFERRED = 'on_plant_transferred'
+ON_GROWLOG_UPDATED = 'on_growlog_updated'
diff --git a/app/hooks.py b/app/hooks.py
new file mode 100644
index 0000000..114dc41
--- /dev/null
+++ b/app/hooks.py
@@ -0,0 +1,32 @@
+from typing import Callable, Dict, List
+import threading
+
+class EventDispatcher:
+    """Central event dispatcher for registering and firing events."""
+    _listeners: Dict[str, List[Callable]] = {}
+    _lock = threading.Lock()
+
+    @classmethod
+    def register(cls, event_name: str, func: Callable):
+        """Register a listener for a specific event."""
+        with cls._lock:
+            cls._listeners.setdefault(event_name, []).append(func)
+
+    @classmethod
+    def dispatch(cls, event_name: str, *args, **kwargs):
+        """Dispatch an event to all registered listeners."""
+        with cls._lock:
+            listeners = list(cls._listeners.get(event_name, []))
+        for listener in listeners:
+            try:
+                listener(*args, **kwargs)
+            except Exception as e:
+                # Optionally log the exception
+                pass
+
+def listen_event(event_name: str):
+    """Decorator to register a function as an event listener."""
+    def decorator(func: Callable):
+        EventDispatcher.register(event_name, func)
+        return func
+    return decorator
diff --git a/files.zip b/files.zip
new file mode 100644
index 0000000..78950b0
Binary files /dev/null and b/files.zip differ
diff --git a/new.zip b/new.zip
deleted file mode 100644
index b3f1f81..0000000
Binary files a/new.zip and /dev/null differ
diff --git a/plugins/admin/__init__.py b/plugins/admin/__init__.py
new file mode 100644
index 0000000..864d480
--- /dev/null
+++ b/plugins/admin/__init__.py
@@ -0,0 +1,6 @@
+import click
+from flask import Flask
+
+def register_cli(app: Flask):
+    # No CLI commands yet for admin plugin
+    pass
diff --git a/plugins/admin/plugin.json b/plugins/admin/plugin.json
new file mode 100644
index 0000000..2aa8b50
--- /dev/null
+++ b/plugins/admin/plugin.json
@@ -0,0 +1,6 @@
+{
+  "name": "admin",
+  "version": "1.0.0",
+  "description": "Administration dashboard and plugin manager",
+  "entry_point": null
+}
\ No newline at end of file
diff --git a/plugins/auth/__init__.py b/plugins/auth/__init__.py
new file mode 100644
index 0000000..c87f661
--- /dev/null
+++ b/plugins/auth/__init__.py
@@ -0,0 +1,6 @@
+import click
+from flask import Flask
+
+def register_cli(app: Flask):
+    # No CLI commands yet for auth plugin
+    pass
diff --git a/plugins/auth/plugin.json b/plugins/auth/plugin.json
new file mode 100644
index 0000000..cd79a46
--- /dev/null
+++ b/plugins/auth/plugin.json
@@ -0,0 +1,6 @@
+{
+  "name": "auth",
+  "version": "1.0.0",
+  "description": "User authentication and authorization plugin",
+  "entry_point": null
+}
\ No newline at end of file
diff --git a/plugins/cli/plugin.json b/plugins/cli/plugin.json
new file mode 100644
index 0000000..7a92909
--- /dev/null
+++ b/plugins/cli/plugin.json
@@ -0,0 +1,6 @@
+{
+  "name": "cli",
+  "version": "1.0.0",
+  "description": "Command-line interface plugin",
+  "entry_point": null
+}
\ No newline at end of file
diff --git a/plugins/plant/__init__.py b/plugins/plant/__init__.py
index 587a922..df24533 100644
--- a/plugins/plant/__init__.py
+++ b/plugins/plant/__init__.py
@@ -1 +1,6 @@
-# plant plugin init
+import click
+from flask import Flask
+
+def register_cli(app: Flask):
+    # No CLI commands yet for plant plugin
+    pass
diff --git a/plugins/plant/plugin.json b/plugins/plant/plugin.json
new file mode 100644
index 0000000..c859ad4
--- /dev/null
+++ b/plugins/plant/plugin.json
@@ -0,0 +1,6 @@
+{
+  "name": "plant",
+  "version": "1.0.0",
+  "description": "Plant profile management plugin",
+  "entry_point": null
+}
\ No newline at end of file
diff --git a/tests/test_app_init.py b/tests/test_app_init.py
new file mode 100644
index 0000000..8475da9
--- /dev/null
+++ b/tests/test_app_init.py
@@ -0,0 +1,10 @@
+
+import pytest
+from app import create_app
+
+def test_app_loads_plugins():
+    app = create_app({'TESTING': True})
+    # Assuming app.plugins is a dict of loaded plugin modules
+    assert hasattr(app, 'plugins'), "App object missing 'plugins' attribute"
+    for plugin in ["auth", "admin", "plant", "cli"]:
+        assert plugin in app.plugins, f"Plugin '{plugin}' not loaded into app.plugins"
diff --git a/tests/test_event_dispatcher.py b/tests/test_event_dispatcher.py
new file mode 100644
index 0000000..a77fd69
--- /dev/null
+++ b/tests/test_event_dispatcher.py
@@ -0,0 +1,22 @@
+import pytest
+from app.hooks import EventDispatcher, listen_event
+
+def test_register_and_dispatch():
+    results = []
+    def listener1(a, b=None):
+        results.append(('l1', a, b))
+    def listener2(a, b=None):
+        results.append(('l2', a, b))
+    EventDispatcher.register('test_event', listener1)
+    EventDispatcher.register('test_event', listener2)
+    EventDispatcher.dispatch('test_event', 1, b=2)
+    assert ('l1', 1, 2) in results
+    assert ('l2', 1, 2) in results
+
+def test_listen_event_decorator():
+    results = []
+    @listen_event('decorated_event')
+    def handler(x):
+        results.append(x)
+    EventDispatcher.dispatch('decorated_event', 'hello')
+    assert results == ['hello']
diff --git a/tests/test_events.py b/tests/test_events.py
new file mode 100644
index 0000000..07b5ded
--- /dev/null
+++ b/tests/test_events.py
@@ -0,0 +1,7 @@
+import app.events as events
+
+def test_event_names_exist():
+    assert hasattr(events, 'ON_USER_CREATED')
+    assert hasattr(events, 'ON_SUBMISSION_SAVED')
+    assert hasattr(events, 'ON_PLANT_TRANSFERRED')
+    assert hasattr(events, 'ON_GROWLOG_UPDATED')
diff --git a/tests/test_plugin_metadata.py b/tests/test_plugin_metadata.py
new file mode 100644
index 0000000..1bfa266
--- /dev/null
+++ b/tests/test_plugin_metadata.py
@@ -0,0 +1,25 @@
+
+import os
+import json
+import pytest
+import importlib
+
+# Directory containing plugins
+PLUGINS_DIR = os.path.abspath(os.path.join(os.path.dirname(__file__), '..', 'plugins'))
+
+@pytest.mark.parametrize("plugin", ["auth", "admin", "plant", "cli"])
+def test_plugin_metadata_and_init(plugin, tmp_path, monkeypatch):
+    # Construct plugin path
+    plugin_path = os.path.join(PLUGINS_DIR, plugin)
+    # Test plugin.json exists and contains required keys
+    meta_path = os.path.join(plugin_path, 'plugin.json')
+    assert os.path.isfile(meta_path), f"plugin.json missing for {plugin}"
+    meta = json.loads(open(meta_path).read())
+    for key in ("name", "version", "description"):
+        assert key in meta, f"{{key}} missing in {plugin}/plugin.json"
+    # Test __init__.py can be imported and has register_cli
+    module_name = f"plugins.{plugin}"
+    spec = importlib.util.spec_from_file_location(module_name, os.path.join(plugin_path, '__init__.py'))
+    module = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(module)
+    assert hasattr(module, "register_cli"), f"register_cli missing in {plugin}/__init__.py"