diff --git a/alembic/env.py b/alembic/env.py
index bec8c62..7f0fbd1 100644
--- a/alembic/env.py
+++ b/alembic/env.py
@@ -3,6 +3,15 @@
 from __future__ import annotations
 
 import asyncio
+
+# F19 (Astra P1): deterministic full-model discovery for Alembic.
+# `from app.models import *` only loads CORE models (48 tables in a fresh
+# process). Contact and ~80 other tables physically live in plugins
+# (e.g. app.plugins.builtins.contacts.models) — the lazy package
+# __getattr__ never fires for wildcard imports. Without the plugin models
+# the metadata sort fails (contact_merge_history → contacts FK) and
+# `alembic check` compares against an incomplete schema.
+import importlib
 from logging.config import fileConfig
 
 from sqlalchemy import pool
@@ -13,6 +22,15 @@ from alembic import context
 from app.config import get_settings
 from app.core.db import Base
 from app.models import *  # noqa: F401,F403
+from app.plugins.registry import get_registry
+
+_registry = get_registry()
+_registry.discover_builtins()
+for _plugin_name in _registry.list_discovered():
+    try:
+        importlib.import_module(f"app.plugins.builtins.{_plugin_name}.models")
+    except ImportError:
+        pass  # plugin has no models module
 
 config = context.config
 if config.config_file_name is not None: