T11: tags plugin + permissions plugin + entity links backend — 68 tests, 66.61% coverage

app/plugins/migration_runner.py

@@ -23,13 +23,25 @@ class MigrationRunner:
         self._engine = engine
         self._migrations_dir = Path(migrations_dir or os.path.join(os.path.dirname(__file__), "migrations"))
 
-    def _resolve_migration_path(self, filename: str) -> Path:
-        """Resolve a migration filename to an absolute path."""
-        # Try migrations_dir first, then app/plugins/migrations/
+    def _resolve_migration_path(self, filename: str, plugin_name: str | None = None) -> Path:
+        """Resolve a migration filename to an absolute path.
+
+        Search order:
+        1. Plugin-specific migrations dir: app/plugins/builtins/<plugin_name>/migrations/
+        2. Global migrations_dir (default: app/plugins/migrations/)
+        3. Shared builtins migrations dir: app/plugins/builtins/migrations/
+        """
+        # 1. Plugin-specific migrations directory
+        if plugin_name:
+            plugin_migrations_dir = Path(__file__).parent / "builtins" / plugin_name / "migrations"
+            candidate = plugin_migrations_dir / filename
+            if candidate.exists():
+                return candidate
+        # 2. Global migrations_dir
         candidate = self._migrations_dir / filename
         if candidate.exists():
             return candidate
-        # Fallback: builtins directory
+        # 3. Shared builtins migrations directory
         builtins_dir = Path(__file__).parent / "builtins" / "migrations"
         candidate2 = builtins_dir / filename
         if candidate2.exists():
@@ -61,7 +73,7 @@ class MigrationRunner:
             FileNotFoundError: If migration file doesn't exist.
             MigrationValidationError: If a created table lacks tenant_id column.
         """
-        migration_path = self._resolve_migration_path(migration_filename)
+        migration_path = self._resolve_migration_path(migration_filename, plugin_name)
         sql_content = migration_path.read_text(encoding="utf-8")
 
         # Capture existing table names before migration (static analysis of SQL)
@@ -156,7 +168,7 @@ class MigrationRunner:
 
         dropped_tables: list[str] = []
         for record in migration_records:
-            migration_path = self._resolve_migration_path(record.migration_file)
+            migration_path = self._resolve_migration_path(record.migration_file, plugin_name)
             sql_content = migration_path.read_text(encoding="utf-8")
 
             # Parse table names from CREATE TABLE statements