diff --git a/src/myfasthtml/assets/core/myfasthtml.js b/src/myfasthtml/assets/core/myfasthtml.js
index ae3ca8f..5b1057a 100644
--- a/src/myfasthtml/assets/core/myfasthtml.js
+++ b/src/myfasthtml/assets/core/myfasthtml.js
@@ -375,7 +375,7 @@ function triggerHtmxAction(elementId, config, combinationStr, isInside, event) {
   }
 
   // Make AJAX call with htmx
-  console.debug(`Triggering HTMX action for element ${elementId}: ${method} ${url}`, htmxOptions);
+  //console.debug(`Triggering HTMX action for element ${elementId}: ${method} ${url}`, htmxOptions);
   htmx.ajax(method, url, htmxOptions);
 }
 
diff --git a/src/myfasthtml/controls/CycleStateControl.py b/src/myfasthtml/controls/CycleStateControl.py
index ebb8ad9..9b22187 100644
--- a/src/myfasthtml/controls/CycleStateControl.py
+++ b/src/myfasthtml/controls/CycleStateControl.py
@@ -1,3 +1,5 @@
+import logging
+
 from fasthtml.components import Div
 
 from myfasthtml.controls.BaseCommands import BaseCommands
@@ -6,6 +8,7 @@ from myfasthtml.core.commands import Command
 from myfasthtml.core.dbmanager import DbObject
 from myfasthtml.core.instances import MultipleInstance
 
+logger = logging.getLogger("CycleStateControl")
 
 class CycleState(DbObject):
   def __init__(self, owner, save_state):
@@ -24,7 +27,7 @@ class Commands(BaseCommands):
 
 class CycleStateControl(MultipleInstance):
   def __init__(self, parent, controls: dict, _id=None, save_state=True):
-    super().__init__(parent, _id)
+    super().__init__(parent, _id=_id)
     self._state = CycleState(self, save_state)
     self.controls_by_states = controls
     self.commands = Commands(self)
@@ -34,6 +37,7 @@ class CycleStateControl(MultipleInstance):
       self._state.state = next(iter(controls.keys()))
   
   def cycle_state(self):
+    logger.debug(f"cycle_state datagrid={self._parent.get_table_name()}")
     keys = list(self.controls_by_states.keys())
     current_idx = keys.index(self._state.state)
     self._state.state = keys[(current_idx + 1) % len(keys)]
diff --git a/src/myfasthtml/controls/DataGrid.py b/src/myfasthtml/controls/DataGrid.py
index 9cc68c3..3ab6893 100644
--- a/src/myfasthtml/controls/DataGrid.py
+++ b/src/myfasthtml/controls/DataGrid.py
@@ -203,7 +203,10 @@ class DataGrid(MultipleInstance):
         "column": mk.icon(column, tooltip="Column selection"),
         "cell": mk.icon(grid, tooltip="Cell selection")
     }
-    self._selection_mode_selector = CycleStateControl(self, controls=selection_types, save_state=False)
+    self._selection_mode_selector = CycleStateControl(self,
+                                                      controls=selection_types,
+                                                      save_state=False,
+                                                      _id="-cycle_state")
     self._selection_mode_selector.bind_command("CycleState", self.commands.change_selection_mode())
     
     # add columns manager
diff --git a/src/myfasthtml/controls/DataGridsManager.py b/src/myfasthtml/controls/DataGridsManager.py
index c0492ab..7dc67d9 100644
--- a/src/myfasthtml/controls/DataGridsManager.py
+++ b/src/myfasthtml/controls/DataGridsManager.py
@@ -167,9 +167,12 @@ class DataGridsManager(SingleInstance, DatagridMetadataProvider):
   
   def list_column_values(self, table_name, column_name):
     return self._registry.get_column_values(table_name, column_name)
-  
+
   def get_row_count(self, table_name):
     return self._registry.get_row_count(table_name)
+
+  def get_column_type(self, table_name, column_name):
+    return self._registry.get_column_type(table_name, column_name)
   
   def list_style_presets(self) -> list[str]:
     return list(self.style_presets.keys())
diff --git a/src/myfasthtml/core/DataGridsRegistry.py b/src/myfasthtml/core/DataGridsRegistry.py
index 255c430..d7f408c 100644
--- a/src/myfasthtml/core/DataGridsRegistry.py
+++ b/src/myfasthtml/core/DataGridsRegistry.py
@@ -59,15 +59,42 @@ class DataGridsRegistry(SingleInstance):
     try:
       as_fullname_dict = self._get_entries_as_full_name_dict()
       grid_id = as_fullname_dict[table_name]
-      
+
       # load dataframe
       state_id = f"{grid_id}#state"
       state = self._db_manager.load(state_id)
       df = state["ne_df"] if state else None
       return len(df) if df is not None else 0
-    
+
     except KeyError:
       return 0
+
+  def get_column_type(self, table_name, column_name):
+    """
+    Get the type of a column.
+
+    Args:
+        table_name: The DataGrid name
+        column_name: The column name
+
+    Returns:
+        ColumnType enum value or None if not found
+    """
+    try:
+      as_fullname_dict = self._get_entries_as_full_name_dict()
+      grid_id = as_fullname_dict[table_name]
+
+      # load datagrid state
+      state_id = f"{grid_id}#state"
+      state = self._db_manager.load(state_id)
+
+      if state and "columns" in state:
+        for col in state["columns"]:
+          if col.col_id == column_name:
+            return col.type
+      return None
+    except KeyError:
+      return None
   
   def _get_all_entries(self):
     return {k: v for k, v in self._db_manager.load(DATAGRIDS_REGISTRY_ENTRY_KEY).items()
diff --git a/src/myfasthtml/core/commands.py b/src/myfasthtml/core/commands.py
index fec03bb..a69ddc0 100644
--- a/src/myfasthtml/core/commands.py
+++ b/src/myfasthtml/core/commands.py
@@ -48,10 +48,13 @@ class Command:
     #   either there is no parameter (so one single instance of the command is enough)
     #   or the parameter is a kwargs (so the parameters are provided when the command is called)
     if key is None:
-      if owner is not None and args is None:  # args is not provided
-        key = f"{owner.get_full_id()}-{name}"
-      else:
-        key = f"{name}-{_compute_from_args()}"
+      key_parts = []
+      if owner is not None:
+        key_parts.append(f"{owner.get_full_id()}")
+      key_parts.append(name)
+      if args:
+        key_parts.append(_compute_from_args())
+      key = "-".join(key_parts)
     else:
       key = key.replace("#{args}", _compute_from_args())
       if owner is not None:
@@ -122,6 +125,8 @@ class Command:
   
   def execute(self, client_response: dict = None):
     logger.debug(f"Executing command {self.name} with arguments {client_response=}")
+    if self._htmx_extra.get("hx-target", "").startswith("#tsm_"):
+      logger.warning(f"  Command {self.name} needs a selection manager to work properly.")
     with ObservableResultCollector(self._bindings) as collector:
       kwargs = self._create_kwargs(self.default_kwargs,
                                    client_response,
@@ -145,6 +150,10 @@ class Command:
             and r.get("id", None) is not None):
           r.attrs["hx-swap-oob"] = r.attrs.get("hx-swap-oob", "true")
     
+    if self._htmx_extra.get("hx-target", "").startswith("#tsm_"):
+      ret_debug = [f"<{r.tag} id={r.attrs.get('id', '')}/>" if r else "None" for r in all_ret]
+      logger.warning(f"  {ret_debug=}")
+    
     return all_ret[0] if len(all_ret) == 1 else all_ret
   
   def htmx(self, target: Optional[str] = "this", swap="outerHTML", trigger=None, auto_swap_oob=True):
diff --git a/src/myfasthtml/core/dbmanager.py b/src/myfasthtml/core/dbmanager.py
index 76a79d7..ebdcaa7 100644
--- a/src/myfasthtml/core/dbmanager.py
+++ b/src/myfasthtml/core/dbmanager.py
@@ -79,11 +79,10 @@ class DbObject:
       return  # still under initialization
     
     if self._reload_self():
-      logger.debug(f"finalize_initialization ({self._name}) : Loaded existing content.")
+      # logger.debug(f"finalize_initialization ({self._name}) : Loaded existing content.")
       return
     else:
-      logger.debug(
-        f"finalize_initialization ({self._name}) : No existing content found, creating new entry {self._save_state=}.")
+      # logger.debug(f"finalize_initialization ({self._name}) : No existing content found, creating new entry {self._save_state=}.")
       self._save_self()
   
   def _reload_self(self):
diff --git a/src/myfasthtml/core/formatting/dsl/completion/FormattingCompletionEngine.py b/src/myfasthtml/core/formatting/dsl/completion/FormattingCompletionEngine.py
index 4457905..9582d88 100644
--- a/src/myfasthtml/core/formatting/dsl/completion/FormattingCompletionEngine.py
+++ b/src/myfasthtml/core/formatting/dsl/completion/FormattingCompletionEngine.py
@@ -181,8 +181,8 @@ class FormattingCompletionEngine(BaseCompletionEngine):
         return presets.COMPARISON_OPERATORS
       
       case Context.OPERATOR_VALUE | Context.BETWEEN_VALUE:
-        # col., True, False + column values
-        base = presets.OPERATOR_VALUE_BASE.copy()
+        # Filter base suggestions according to column type
+        base = self._get_base_suggestions_for_column_type(scope)
         base.extend(self._get_column_value_suggestions(scope))
         return base
       
@@ -363,6 +363,44 @@ class FormattingCompletionEngine(BaseCompletionEngine):
     except Exception:
       return []
 
+  def _get_base_suggestions_for_column_type(self, scope: DetectedScope) -> list[Suggestion]:
+    """
+    Filter base suggestions according to column type.
+
+    Only suggests True/False for Boolean columns.
+    Always suggests col. for cross-column comparisons.
+
+    Args:
+        scope: The detected scope containing column information
+
+    Returns:
+        List of filtered base suggestions
+    """
+    from myfasthtml.core.constants import ColumnType
+
+    if not scope.column_name:
+      # No column context, return all base suggestions
+      return presets.OPERATOR_VALUE_BASE.copy()
+
+    try:
+      table_name = scope.table_name or self.table_name or ""
+      col_type = self.provider.get_column_type(table_name, scope.column_name)
+
+      suggestions = []
+
+      # Always suggest col. for cross-column comparisons
+      suggestions.append(Suggestion("col.", "Reference another column", "keyword"))
+
+      # Add True/False only for Boolean columns
+      if col_type == ColumnType.Bool:
+        suggestions.append(Suggestion("True", "Boolean true", "literal"))
+        suggestions.append(Suggestion("False", "Boolean false", "literal"))
+
+      return suggestions
+    except Exception:
+      # Fallback to default if type detection fails
+      return presets.OPERATOR_VALUE_BASE.copy()
+
 
 def get_completions(
     text: str,
diff --git a/src/myfasthtml/core/formatting/dsl/completion/provider.py b/src/myfasthtml/core/formatting/dsl/completion/provider.py
index a1592e3..b48fef7 100644
--- a/src/myfasthtml/core/formatting/dsl/completion/provider.py
+++ b/src/myfasthtml/core/formatting/dsl/completion/provider.py
@@ -72,3 +72,18 @@ class DatagridMetadataProvider(BaseMetadataProvider):
         Number of rows
     """
     ...
+
+  def get_column_type(self, table_name: str, column_name: str):
+    """
+    Return the type of a column.
+
+    Used to filter suggestions based on column type.
+
+    Args:
+        table_name: The DataGrid name
+        column_name: The column name
+
+    Returns:
+        ColumnType enum value or None if not found
+    """
+    ...
diff --git a/src/myfasthtml/core/instances.py b/src/myfasthtml/core/instances.py
index 2c66d0f..662a974 100644
--- a/src/myfasthtml/core/instances.py
+++ b/src/myfasthtml/core/instances.py
@@ -6,6 +6,8 @@ from myfasthtml.controls.helpers import Ids
 from myfasthtml.core.constants import NO_DEFAULT_VALUE
 from myfasthtml.core.utils import pascal_to_snake, get_class, snake_to_pascal
 
+VERBOSE_VERBOSE = False
+
 logger = logging.getLogger("InstancesManager")
 
 special_session = {
@@ -26,12 +28,19 @@ class BaseInstance:
   def __new__(cls, *args, **kwargs):
     # Extract arguments from both positional and keyword arguments
     # Signature matches __init__: parent, session=None, _id=None, auto_register=True
+    if VERBOSE_VERBOSE:
+      logger.debug(f"Creating new instance of type {cls.__name__}")
+    
     parent = args[0] if len(args) > 0 and isinstance(args[0], BaseInstance) else kwargs.get("parent", None)
     session = args[1] if len(args) > 1 and isinstance(args[1], dict) else kwargs.get("session", None)
     _id = args[2] if len(args) > 2 and isinstance(args[2], str) else kwargs.get("_id", None)
+    if VERBOSE_VERBOSE:
+      logger.debug(f"  parent={parent}, session={session}, _id={_id}")
     
     # Compute _id
     _id = cls.compute_id(_id, parent)
+    if VERBOSE_VERBOSE:
+      logger.debug(f"  computed id={_id}")
     
     if session is None:
       if parent is not None:
@@ -46,9 +55,14 @@ class BaseInstance:
       res = InstancesManager.instances[key]
       if type(res) is not cls:
         raise TypeError(f"Instance with id {_id} already exists, but is of type {type(res)}")
+      
+      if VERBOSE_VERBOSE:
+        logger.debug(f"  instance {_id} already exists, returning existing instance")
       return res
     
     # Otherwise create a new instance
+    if VERBOSE_VERBOSE:
+      logger.debug(f"  creating new instance")
     instance = super().__new__(cls)
     instance._is_new_instance = True  # mark as fresh
     return instance