From e5f0efe49310f630212227c2064af4515a87c118 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Sun, 15 Mar 2026 13:58:32 +0000
Subject: [PATCH 01/14] Update CLAUDE.md to require Hungarian notation

Replace the no-Hungarian-notation rule with a mandatory Hungarian notation
convention. Update all code examples throughout the document to use the
correct prefixes (mo_, mv_, mt_, ms_, lo_, lv_, lt_, ls_).

https://claude.ai/code/session_01GVUQCR1XcJbdSPwHfUzoZB
---
 CLAUDE.md | 86 +++++++++++++++++++++++++++----------------------------
 1 file changed, 43 insertions(+), 43 deletions(-)

diff --git a/CLAUDE.md b/CLAUDE.md
index 0ce22ac3..7dbd1b70 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -33,7 +33,7 @@ All serialized files (`.abap`, `.xml`, and any other abapGit-managed file types)
 - Never use an init flag attribute (`check_initialized`, `mv_init`, `is_initialized`, etc.). Always use `client->check_on_init( )` instead.
 - Use backticks for all string literals, not single quotes.
 - Prefer functional to procedural language constructs — use `var = VALUE #( ).` to reset a variable, never `CLEAR var.`.
-- Do not use Hungarian notation — no type prefixes on variable or attribute names (e.g. `product` not `lv_product`, `client` not `mo_client`).
+- Use Hungarian notation — always add type prefixes to variable and attribute names (e.g. `lv_product` not `product`, `mo_client` not `client`, `lt_items` not `items`, `ls_row` not `row`). Common prefixes: `lv_` local value, `lt_` local table, `ls_` local structure, `lr_` local reference, `mv_` instance attribute value, `mt_` instance attribute table, `ms_` instance attribute structure, `mo_` instance attribute object.
 - Class names are always written in **lowercase** in both `DEFINITION` and `IMPLEMENTATION` — never uppercase.
 - Classes are **not** `FINAL` — do not add the `FINAL` keyword to class definitions.
 - Use `DEFINITION PUBLIC.` — never `DEFINITION PUBLIC CREATE PUBLIC.` (`CREATE PUBLIC` is the default and adds unnecessary overhead).
@@ -56,15 +56,15 @@ All serialized files (`.abap`, `.xml`, and any other abapGit-managed file types)
   - Always add 1 blank line **before** `ELSEIF` and `ELSE`.
   - If a branch (`IF`, `ELSEIF`, `ELSE`) contains **more than one statement**, add 1 blank line directly after the condition line as well:
     ```abap
-    me->client = client.
+    mo_client = io_client.
 
-    IF client->check_on_init( ).
+    IF mo_client->check_on_init( ).
 
-      product  = `products`.
-      quantity = `500`.
+      mv_product  = `products`.
+      mv_quantity = `500`.
       view_display( ).
 
-    ELSEIF client->check_on_event( `SAVE` ).
+    ELSEIF mo_client->check_on_event( `SAVE` ).
       data_update( ).
     ENDIF.
     ```
@@ -85,11 +85,11 @@ Every abap2UI5 app implements `z2ui5_if_app` with a single `main()` method. The
 
 Always use `ELSEIF` to chain these checks — never separate `IF` blocks:
 ```abap
-IF client->check_on_init( ).
+IF mo_client->check_on_init( ).
   ...
-ELSEIF client->check_on_navigated( ).
+ELSEIF mo_client->check_on_navigated( ).
   ...
-ELSEIF client->check_on_event( ).
+ELSEIF mo_client->check_on_event( ).
   ...
 ENDIF.
 ```
@@ -99,11 +99,11 @@ ENDIF.
 `check_on_event( )` accepts an optional event name argument. Use it to check for a specific event directly in the `ELSEIF` chain when there are **2–3 events** and no complex dispatch logic is needed:
 
 ```abap
-IF client->check_on_init( ).
+IF mo_client->check_on_init( ).
   ...
-ELSEIF client->check_on_event( `SAVE` ).
+ELSEIF mo_client->check_on_event( `SAVE` ).
   data_update( ).
-ELSEIF client->check_on_event( `DELETE` ).
+ELSEIF mo_client->check_on_event( `DELETE` ).
   data_delete( ).
 ENDIF.
 ```
@@ -137,12 +137,12 @@ Always use `client->_event_nav_app_leave()` to bind the back button event direct
 ```abap
 METHOD view_display.
 
-  DATA(view) = z2ui5_cl_xml_view=>factory( ).
-  DATA(page) = view->page( title = `My App`
-                            shownavbutton = client->check_app_prev_stack( )
-                            navbuttonpress = client->_event_nav_app_leave( ) ).
+  DATA(lo_view) = z2ui5_cl_xml_view=>factory( ).
+  DATA(lo_page) = lo_view->page( title = `My App`
+                                  shownavbutton  = mo_client->check_app_prev_stack( )
+                                  navbuttonpress = mo_client->_event_nav_app_leave( ) ).
   " ...
-  client->view_display( view->stringify( ) ).
+  mo_client->view_display( lo_view->stringify( ) ).
 
 ENDMETHOD.
 ```
@@ -152,11 +152,11 @@ Only use the manual pattern (handling `BACK` in `on_event`) when you need to do
 ```abap
 METHOD on_event.
 
-  CASE client->get( )-event.
+  CASE mo_client->get( )-event.
     WHEN `BACK`.
       " interact with previous app instance first
-      CAST z2ui5_cl_app_parent( client->get_app_prev( ) )->set_result( ms_result ).
-      client->nav_app_leave( ).
+      CAST z2ui5_cl_app_parent( mo_client->get_app_prev( ) )->set_result( ms_result ).
+      mo_client->nav_app_leave( ).
   ENDCASE.
 
 ENDMETHOD.
@@ -171,9 +171,9 @@ Pre-built methods for common UI5 controls (`shell`, `page`, `simple_form`, `inpu
 
 #### View structure and indentation
 
-Always add 1 blank line before `DATA(view) = z2ui5_cl_xml_view=>factory( ).` to visually separate view construction from preceding logic.
+Always add 1 blank line before `DATA(lo_view) = z2ui5_cl_xml_view=>factory( ).` to visually separate view construction from preceding logic.
 
-Always build the view in `view_display` and call `client->view_display( view->stringify( ) )` as a **standalone statement at the end** — never nested inside the chain.
+Always build the view in `view_display` and call `mo_client->view_display( lo_view->stringify( ) )` as a **standalone statement at the end** — never nested inside the chain.
 
 Indent the fluent chain to reflect the XML hierarchy:
 - Each method that **navigates into a child element** (returns a child node) is indented **4 spaces deeper** than its parent call.
@@ -186,11 +186,11 @@ Indent the fluent chain to reflect the XML hierarchy:
 
 ```abap
 )->input(
-    value   = product
+    value   = mv_product
     enabled = abap_false
 )->button(
     text  = `Post`
-    press = client->_event( `POST` ) ).
+    press = mo_client->_event( `POST` ) ).
 ```
 
 Never put two or more named parameters on the same line.
@@ -198,26 +198,26 @@ Never put two or more named parameters on the same line.
 ```abap
 METHOD view_display.
 
-  DATA(view) = z2ui5_cl_xml_view=>factory( ).
-  view->shell(
+  DATA(lo_view) = z2ui5_cl_xml_view=>factory( ).
+  lo_view->shell(
       )->page(
           title          = `My App`
-          navbuttonpress = client->_event_nav_app_leave( )
-          shownavbutton  = client->check_app_prev_stack( )
+          navbuttonpress = mo_client->_event_nav_app_leave( )
+          shownavbutton  = mo_client->check_app_prev_stack( )
           )->simple_form(
               title    = `Form Title`
               editable = abap_true
               )->content( `form`
               )->label( `Quantity`
-              )->input( client->_bind_edit( quantity )
+              )->input( mo_client->_bind_edit( mv_quantity )
               )->label( `Product`
               )->input(
-                  value   = product
+                  value   = mv_product
                   enabled = abap_false
               )->button(
                   text  = `Post`
-                  press = client->_event( `POST` ) ).
-  client->view_display( view->stringify( ) ).
+                  press = mo_client->_event( `POST` ) ).
+  mo_client->view_display( lo_view->stringify( ) ).
 
 ENDMETHOD.
 ```
@@ -245,7 +245,7 @@ Builds any XML structure directly from element names, namespaces and attributes.
         ( n = `editable` v = abap_true ) )
 )->_( n = `content` ns = `form`
 )->__( n = `Label` a = `text` v = `qty`
-)->__( n = `Input` a = `value` v = client->_bind_edit( qty ) )
+)->__( n = `Input` a = `value` v = mo_client->_bind_edit( mv_qty ) )
 ```
 
 Key rules for `z2ui5_cl_util_xml`:
@@ -280,7 +280,7 @@ CLASS z2ui5_cl_app_xxx DEFINITION PUBLIC.
     INTERFACES z2ui5_if_app.
     " bound data (DATA attributes for _bind/_bind_edit)...
   PROTECTED SECTION.
-    DATA client TYPE REF TO z2ui5_if_client.
+    DATA mo_client TYPE REF TO z2ui5_if_client.
     METHODS on_init.        " first call: load data, display view
     METHODS on_event.       " user triggered an event
     METHODS on_navigation.  " returned from sub-app or popup
@@ -295,12 +295,12 @@ CLASS z2ui5_cl_app_xxx IMPLEMENTATION.
 
   METHOD z2ui5_if_app~main.
 
-    me->client = client.
-    IF client->check_on_init( ).
+    mo_client = io_client.
+    IF mo_client->check_on_init( ).
       on_init( ).
-    ELSEIF client->check_on_navigated( ).
+    ELSEIF mo_client->check_on_navigated( ).
       on_navigation( ).
-    ELSEIF client->check_on_event( ).
+    ELSEIF mo_client->check_on_event( ).
       on_event( ).
     ENDIF.
 
@@ -318,18 +318,18 @@ CLASS z2ui5_cl_app_xxx IMPLEMENTATION.
   METHOD on_navigation.
 
     data_read( ).
-    client->view_model_update( ).
+    mo_client->view_model_update( ).
 
   ENDMETHOD.
 
 
   METHOD on_event.
 
-    CASE client->get( )-event.
+    CASE mo_client->get( )-event.
       WHEN `SAVE`.
         on_event_save( ).
       WHEN `BACK`.
-        client->nav_app_leave( ).
+        mo_client->nav_app_leave( ).
     ENDCASE.
 
   ENDMETHOD.
@@ -344,9 +344,9 @@ CLASS z2ui5_cl_app_xxx IMPLEMENTATION.
 
   METHOD view_display.
 
-    DATA(view) = z2ui5_cl_xml_view=>factory( ).
+    DATA(lo_view) = z2ui5_cl_xml_view=>factory( ).
     " ...
-    client->view_display( view->stringify( ) ).
+    mo_client->view_display( lo_view->stringify( ) ).
 
   ENDMETHOD.
 

From 95855ff8efc16289f648b31fc4eb2bfbc6c5df2d Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Sun, 15 Mar 2026 14:03:00 +0000
Subject: [PATCH 02/14] Refactor app 002 and update notation rule to t_/s_
 prefixes only

Add t_ prefix to table attributes (t_suggestions, t_combo) and s_ prefix
to structure attributes (s_screen) in app 002. Update CLAUDE.md to reflect
the narrowed convention: only tables and structures get type prefixes.

https://claude.ai/code/session_01GVUQCR1XcJbdSPwHfUzoZB
---
 CLAUDE.md                           | 86 ++++++++++++++---------------
 src/z2ui5_cl_demo_app_002.clas.abap | 44 +++++++--------
 2 files changed, 65 insertions(+), 65 deletions(-)

diff --git a/CLAUDE.md b/CLAUDE.md
index 7dbd1b70..6beda517 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -33,7 +33,7 @@ All serialized files (`.abap`, `.xml`, and any other abapGit-managed file types)
 - Never use an init flag attribute (`check_initialized`, `mv_init`, `is_initialized`, etc.). Always use `client->check_on_init( )` instead.
 - Use backticks for all string literals, not single quotes.
 - Prefer functional to procedural language constructs — use `var = VALUE #( ).` to reset a variable, never `CLEAR var.`.
-- Use Hungarian notation — always add type prefixes to variable and attribute names (e.g. `lv_product` not `product`, `mo_client` not `client`, `lt_items` not `items`, `ls_row` not `row`). Common prefixes: `lv_` local value, `lt_` local table, `ls_` local structure, `lr_` local reference, `mv_` instance attribute value, `mt_` instance attribute table, `ms_` instance attribute structure, `mo_` instance attribute object.
+- Use type prefixes only for tables and structures: prefix table variables/attributes with `t_` (e.g. `t_items`) and structure variables/attributes with `s_` (e.g. `s_screen`). Do not add prefixes to scalar variables or object references.
 - Class names are always written in **lowercase** in both `DEFINITION` and `IMPLEMENTATION` — never uppercase.
 - Classes are **not** `FINAL` — do not add the `FINAL` keyword to class definitions.
 - Use `DEFINITION PUBLIC.` — never `DEFINITION PUBLIC CREATE PUBLIC.` (`CREATE PUBLIC` is the default and adds unnecessary overhead).
@@ -56,15 +56,15 @@ All serialized files (`.abap`, `.xml`, and any other abapGit-managed file types)
   - Always add 1 blank line **before** `ELSEIF` and `ELSE`.
   - If a branch (`IF`, `ELSEIF`, `ELSE`) contains **more than one statement**, add 1 blank line directly after the condition line as well:
     ```abap
-    mo_client = io_client.
+    me->client = client.
 
-    IF mo_client->check_on_init( ).
+    IF client->check_on_init( ).
 
-      mv_product  = `products`.
-      mv_quantity = `500`.
+      product  = `products`.
+      quantity = `500`.
       view_display( ).
 
-    ELSEIF mo_client->check_on_event( `SAVE` ).
+    ELSEIF client->check_on_event( `SAVE` ).
       data_update( ).
     ENDIF.
     ```
@@ -85,11 +85,11 @@ Every abap2UI5 app implements `z2ui5_if_app` with a single `main()` method. The
 
 Always use `ELSEIF` to chain these checks — never separate `IF` blocks:
 ```abap
-IF mo_client->check_on_init( ).
+IF client->check_on_init( ).
   ...
-ELSEIF mo_client->check_on_navigated( ).
+ELSEIF client->check_on_navigated( ).
   ...
-ELSEIF mo_client->check_on_event( ).
+ELSEIF client->check_on_event( ).
   ...
 ENDIF.
 ```
@@ -99,11 +99,11 @@ ENDIF.
 `check_on_event( )` accepts an optional event name argument. Use it to check for a specific event directly in the `ELSEIF` chain when there are **2–3 events** and no complex dispatch logic is needed:
 
 ```abap
-IF mo_client->check_on_init( ).
+IF client->check_on_init( ).
   ...
-ELSEIF mo_client->check_on_event( `SAVE` ).
+ELSEIF client->check_on_event( `SAVE` ).
   data_update( ).
-ELSEIF mo_client->check_on_event( `DELETE` ).
+ELSEIF client->check_on_event( `DELETE` ).
   data_delete( ).
 ENDIF.
 ```
@@ -137,12 +137,12 @@ Always use `client->_event_nav_app_leave()` to bind the back button event direct
 ```abap
 METHOD view_display.
 
-  DATA(lo_view) = z2ui5_cl_xml_view=>factory( ).
-  DATA(lo_page) = lo_view->page( title = `My App`
-                                  shownavbutton  = mo_client->check_app_prev_stack( )
-                                  navbuttonpress = mo_client->_event_nav_app_leave( ) ).
+  DATA(view) = z2ui5_cl_xml_view=>factory( ).
+  DATA(page) = view->page( title = `My App`
+                            shownavbutton = client->check_app_prev_stack( )
+                            navbuttonpress = client->_event_nav_app_leave( ) ).
   " ...
-  mo_client->view_display( lo_view->stringify( ) ).
+  client->view_display( view->stringify( ) ).
 
 ENDMETHOD.
 ```
@@ -152,11 +152,11 @@ Only use the manual pattern (handling `BACK` in `on_event`) when you need to do
 ```abap
 METHOD on_event.
 
-  CASE mo_client->get( )-event.
+  CASE client->get( )-event.
     WHEN `BACK`.
       " interact with previous app instance first
-      CAST z2ui5_cl_app_parent( mo_client->get_app_prev( ) )->set_result( ms_result ).
-      mo_client->nav_app_leave( ).
+      CAST z2ui5_cl_app_parent( client->get_app_prev( ) )->set_result( s_result ).
+      client->nav_app_leave( ).
   ENDCASE.
 
 ENDMETHOD.
@@ -171,9 +171,9 @@ Pre-built methods for common UI5 controls (`shell`, `page`, `simple_form`, `inpu
 
 #### View structure and indentation
 
-Always add 1 blank line before `DATA(lo_view) = z2ui5_cl_xml_view=>factory( ).` to visually separate view construction from preceding logic.
+Always add 1 blank line before `DATA(view) = z2ui5_cl_xml_view=>factory( ).` to visually separate view construction from preceding logic.
 
-Always build the view in `view_display` and call `mo_client->view_display( lo_view->stringify( ) )` as a **standalone statement at the end** — never nested inside the chain.
+Always build the view in `view_display` and call `client->view_display( view->stringify( ) )` as a **standalone statement at the end** — never nested inside the chain.
 
 Indent the fluent chain to reflect the XML hierarchy:
 - Each method that **navigates into a child element** (returns a child node) is indented **4 spaces deeper** than its parent call.
@@ -186,11 +186,11 @@ Indent the fluent chain to reflect the XML hierarchy:
 
 ```abap
 )->input(
-    value   = mv_product
+    value   = product
     enabled = abap_false
 )->button(
     text  = `Post`
-    press = mo_client->_event( `POST` ) ).
+    press = client->_event( `POST` ) ).
 ```
 
 Never put two or more named parameters on the same line.
@@ -198,26 +198,26 @@ Never put two or more named parameters on the same line.
 ```abap
 METHOD view_display.
 
-  DATA(lo_view) = z2ui5_cl_xml_view=>factory( ).
-  lo_view->shell(
+  DATA(view) = z2ui5_cl_xml_view=>factory( ).
+  view->shell(
       )->page(
           title          = `My App`
-          navbuttonpress = mo_client->_event_nav_app_leave( )
-          shownavbutton  = mo_client->check_app_prev_stack( )
+          navbuttonpress = client->_event_nav_app_leave( )
+          shownavbutton  = client->check_app_prev_stack( )
           )->simple_form(
               title    = `Form Title`
               editable = abap_true
               )->content( `form`
               )->label( `Quantity`
-              )->input( mo_client->_bind_edit( mv_quantity )
+              )->input( client->_bind_edit( quantity )
               )->label( `Product`
               )->input(
-                  value   = mv_product
+                  value   = product
                   enabled = abap_false
               )->button(
                   text  = `Post`
-                  press = mo_client->_event( `POST` ) ).
-  mo_client->view_display( lo_view->stringify( ) ).
+                  press = client->_event( `POST` ) ).
+  client->view_display( view->stringify( ) ).
 
 ENDMETHOD.
 ```
@@ -245,7 +245,7 @@ Builds any XML structure directly from element names, namespaces and attributes.
         ( n = `editable` v = abap_true ) )
 )->_( n = `content` ns = `form`
 )->__( n = `Label` a = `text` v = `qty`
-)->__( n = `Input` a = `value` v = mo_client->_bind_edit( mv_qty ) )
+)->__( n = `Input` a = `value` v = client->_bind_edit( qty ) )
 ```
 
 Key rules for `z2ui5_cl_util_xml`:
@@ -280,7 +280,7 @@ CLASS z2ui5_cl_app_xxx DEFINITION PUBLIC.
     INTERFACES z2ui5_if_app.
     " bound data (DATA attributes for _bind/_bind_edit)...
   PROTECTED SECTION.
-    DATA mo_client TYPE REF TO z2ui5_if_client.
+    DATA client TYPE REF TO z2ui5_if_client.
     METHODS on_init.        " first call: load data, display view
     METHODS on_event.       " user triggered an event
     METHODS on_navigation.  " returned from sub-app or popup
@@ -295,12 +295,12 @@ CLASS z2ui5_cl_app_xxx IMPLEMENTATION.
 
   METHOD z2ui5_if_app~main.
 
-    mo_client = io_client.
-    IF mo_client->check_on_init( ).
+    me->client = client.
+    IF client->check_on_init( ).
       on_init( ).
-    ELSEIF mo_client->check_on_navigated( ).
+    ELSEIF client->check_on_navigated( ).
       on_navigation( ).
-    ELSEIF mo_client->check_on_event( ).
+    ELSEIF client->check_on_event( ).
       on_event( ).
     ENDIF.
 
@@ -318,18 +318,18 @@ CLASS z2ui5_cl_app_xxx IMPLEMENTATION.
   METHOD on_navigation.
 
     data_read( ).
-    mo_client->view_model_update( ).
+    client->view_model_update( ).
 
   ENDMETHOD.
 
 
   METHOD on_event.
 
-    CASE mo_client->get( )-event.
+    CASE client->get( )-event.
       WHEN `SAVE`.
         on_event_save( ).
       WHEN `BACK`.
-        mo_client->nav_app_leave( ).
+        client->nav_app_leave( ).
     ENDCASE.
 
   ENDMETHOD.
@@ -344,9 +344,9 @@ CLASS z2ui5_cl_app_xxx IMPLEMENTATION.
 
   METHOD view_display.
 
-    DATA(lo_view) = z2ui5_cl_xml_view=>factory( ).
+    DATA(view) = z2ui5_cl_xml_view=>factory( ).
     " ...
-    mo_client->view_display( lo_view->stringify( ) ).
+    client->view_display( view->stringify( ) ).
 
   ENDMETHOD.
 
diff --git a/src/z2ui5_cl_demo_app_002.clas.abap b/src/z2ui5_cl_demo_app_002.clas.abap
index 8d29fdf8..81fbf586 100644
--- a/src/z2ui5_cl_demo_app_002.clas.abap
+++ b/src/z2ui5_cl_demo_app_002.clas.abap
@@ -15,7 +15,7 @@ CLASS z2ui5_cl_demo_app_002 DEFINITION PUBLIC.
       END OF combobox_item.
 
     DATA:
-      BEGIN OF screen,
+      BEGIN OF s_screen,
         check_is_active TYPE abap_bool,
         colour          TYPE string,
         combo_key       TYPE string,
@@ -27,10 +27,10 @@ CLASS z2ui5_cl_demo_app_002 DEFINITION PUBLIC.
         time_end        TYPE string,
         check_switch_01 TYPE abap_bool VALUE abap_false,
         check_switch_02 TYPE abap_bool VALUE abap_false,
-      END OF screen.
+      END OF s_screen.
 
-    DATA suggestions TYPE STANDARD TABLE OF suggestion_item WITH EMPTY KEY.
-    DATA combo       TYPE STANDARD TABLE OF combobox_item WITH EMPTY KEY.
+    DATA t_suggestions TYPE STANDARD TABLE OF suggestion_item WITH EMPTY KEY.
+    DATA t_combo       TYPE STANDARD TABLE OF combobox_item WITH EMPTY KEY.
 
   PROTECTED SECTION.
     DATA client TYPE REF TO z2ui5_if_client.
@@ -59,7 +59,7 @@ CLASS z2ui5_cl_demo_app_002 IMPLEMENTATION.
 
   METHOD on_init.
 
-    screen = VALUE #(
+    s_screen = VALUE #(
         check_is_active = abap_true
         colour          = `BLUE`
         combo_key       = `GRAY`
@@ -69,7 +69,7 @@ CLASS z2ui5_cl_demo_app_002 IMPLEMENTATION.
         time_start      = `05:24:00`
         time_end        = `17:23:57` ).
 
-    suggestions = VALUE #(
+    t_suggestions = VALUE #(
         ( descr = `Green`  value = `GREEN` )
         ( descr = `Blue`   value = `BLUE` )
         ( descr = `Black`  value = `BLACK` )
@@ -77,7 +77,7 @@ CLASS z2ui5_cl_demo_app_002 IMPLEMENTATION.
         ( descr = `Blue2`  value = `BLUE2` )
         ( descr = `Blue3`  value = `BLUE3` ) ).
 
-    combo = VALUE #(
+    t_combo = VALUE #(
         ( key = `BLUE`  text = `green` )
         ( key = `GREEN` text = `blue` )
         ( key = `BLACK` text = `red` )
@@ -94,7 +94,7 @@ CLASS z2ui5_cl_demo_app_002 IMPLEMENTATION.
       WHEN `BUTTON_SEND`.
         client->message_box_display( `success - values send to the server` ).
       WHEN `BUTTON_CLEAR`.
-        screen = VALUE #( ).
+        s_screen = VALUE #( ).
         client->message_toast_display( `View initialized` ).
     ENDCASE.
 
@@ -120,9 +120,9 @@ CLASS z2ui5_cl_demo_app_002 IMPLEMENTATION.
         )->label( `Input with suggestion items`
         )->input(
             id              = `suggInput`
-            value           = client->_bind_edit( screen-colour )
+            value           = client->_bind_edit( s_screen-colour )
             placeholder     = `Fill in your favorite color`
-            suggestionitems = client->_bind( suggestions )
+            suggestionitems = client->_bind( t_suggestions )
             showsuggestion  = abap_true )->get(
         )->suggestion_items( )->get(
             )->list_item(
@@ -134,12 +134,12 @@ CLASS z2ui5_cl_demo_app_002 IMPLEMENTATION.
         editable = abap_true
         )->content( `form`
         )->label( `Date`
-        )->date_picker( client->_bind_edit( screen-date )
+        )->date_picker( client->_bind_edit( s_screen-date )
         )->label( `Date and Time`
-        )->date_time_picker( client->_bind_edit( screen-date_time )
+        )->date_time_picker( client->_bind_edit( s_screen-date_time )
         )->label( `Time Begin/End`
-        )->time_picker( client->_bind_edit( screen-time_start )
-        )->time_picker( client->_bind_edit( screen-time_end ) ).
+        )->time_picker( client->_bind_edit( s_screen-time_start )
+        )->time_picker( client->_bind_edit( s_screen-time_end ) ).
 
     DATA(content) = page->grid( `L12 M12 S12`
         )->content( `layout`
@@ -149,26 +149,26 @@ CLASS z2ui5_cl_demo_app_002 IMPLEMENTATION.
                 )->content( `form` ).
 
     content->label( `Checkbox` )->checkbox(
-        selected = client->_bind_edit( screen-check_is_active )
+        selected = client->_bind_edit( s_screen-check_is_active )
         text     = `this is a checkbox`
         enabled  = abap_true ).
 
     content->label( `Combobox` )->combobox(
-        selectedkey = client->_bind_edit( screen-combo_key )
-        items       = client->_bind( combo )
+        selectedkey = client->_bind_edit( s_screen-combo_key )
+        items       = client->_bind( t_combo )
         )->item(
             key  = `{KEY}`
             text = `{TEXT}` ).
 
     content->label( `Combobox2` )->combobox(
-        selectedkey = client->_bind_edit( screen-combo_key2 )
-        items       = client->_bind( combo )
+        selectedkey = client->_bind_edit( s_screen-combo_key2 )
+        items       = client->_bind( t_combo )
         )->item(
             key  = `{KEY}`
             text = `{TEXT}` ).
 
     content->label( `Segmented Button` )->segmented_button(
-        client->_bind_edit( screen-segment_key )
+        client->_bind_edit( s_screen-segment_key )
         )->items(
             )->segmented_button_item(
                 key  = `BLUE`
@@ -189,13 +189,13 @@ CLASS z2ui5_cl_demo_app_002 IMPLEMENTATION.
         customtextoff = `B` ).
 
     content->label( `Switch accept/reject` )->switch(
-        state         = client->_bind_edit( screen-check_switch_01 )
+        state         = client->_bind_edit( s_screen-check_switch_01 )
         customtexton  = `on`
         customtextoff = `off`
         type          = `AcceptReject` ).
 
     content->label( `Switch normal` )->switch(
-        state         = client->_bind_edit( screen-check_switch_02 )
+        state         = client->_bind_edit( s_screen-check_switch_02 )
         customtexton  = `YES`
         customtextoff = `NO` ).
 

From d88a6ac90953bb260295a81a48e50e83c91b9ad9 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Sun, 15 Mar 2026 14:27:27 +0000
Subject: [PATCH 03/14] Refactor app 003 to follow code conventions

- Lowercase class name in IMPLEMENTATION block
- Replace all single quotes with backticks
- Fix shownavbutton indentation alignment
- Replace separate CASE block with ELSEIF chain
- Fix blank lines: class definition, between blocks, inside method

https://claude.ai/code/session_01GVUQCR1XcJbdSPwHfUzoZB
---
 src/z2ui5_cl_demo_app_003.clas.abap | 47 ++++++++++++-----------------
 1 file changed, 20 insertions(+), 27 deletions(-)

diff --git a/src/z2ui5_cl_demo_app_003.clas.abap b/src/z2ui5_cl_demo_app_003.clas.abap
index f9aca216..e77f1332 100644
--- a/src/z2ui5_cl_demo_app_003.clas.abap
+++ b/src/z2ui5_cl_demo_app_003.clas.abap
@@ -1,7 +1,6 @@
 CLASS z2ui5_cl_demo_app_003 DEFINITION PUBLIC.
 
   PUBLIC SECTION.
-
     INTERFACES z2ui5_if_app.
 
     TYPES:
@@ -17,57 +16,51 @@ CLASS z2ui5_cl_demo_app_003 DEFINITION PUBLIC.
 
     DATA t_tab TYPE STANDARD TABLE OF ty_row WITH EMPTY KEY.
 
-
   PROTECTED SECTION.
   PRIVATE SECTION.
 ENDCLASS.
 
 
-
-CLASS Z2UI5_CL_DEMO_APP_003 IMPLEMENTATION.
-
+CLASS z2ui5_cl_demo_app_003 IMPLEMENTATION.
 
   METHOD z2ui5_if_app~main.
 
     IF client->check_on_init( ).
 
       t_tab = VALUE #(
-        ( title = 'row_01'  info = 'completed'   descr = 'this is a description' icon = 'sap-icon://account' )
-        ( title = 'row_02'  info = 'incompleted' descr = 'this is a description' icon = 'sap-icon://account' )
-        ( title = 'row_03'  info = 'working'     descr = 'this is a description' icon = 'sap-icon://account' )
-        ( title = 'row_04'  info = 'working'     descr = 'this is a description' icon = 'sap-icon://account' )
-        ( title = 'row_05'  info = 'completed'   descr = 'this is a description' icon = 'sap-icon://account' )
-        ( title = 'row_06'  info = 'completed'   descr = 'this is a description' icon = 'sap-icon://account' ) ).
+          ( title = `row_01`  info = `completed`   descr = `this is a description` icon = `sap-icon://account` )
+          ( title = `row_02`  info = `incompleted` descr = `this is a description` icon = `sap-icon://account` )
+          ( title = `row_03`  info = `working`     descr = `this is a description` icon = `sap-icon://account` )
+          ( title = `row_04`  info = `working`     descr = `this is a description` icon = `sap-icon://account` )
+          ( title = `row_05`  info = `completed`   descr = `this is a description` icon = `sap-icon://account` )
+          ( title = `row_06`  info = `completed`   descr = `this is a description` icon = `sap-icon://account` ) ).
 
       DATA(view) = z2ui5_cl_xml_view=>factory( ).
       DATA(page) = view->shell(
           )->page(
-              title           = 'abap2UI5 - List'
-              navbuttonpress  = client->_event_nav_app_leave( )
-                shownavbutton = client->check_app_prev_stack( ) ).
+              title          = `abap2UI5 - List`
+              navbuttonpress = client->_event_nav_app_leave( )
+              shownavbutton  = client->check_app_prev_stack( ) ).
 
       page->list(
-          headertext      = 'List Ouput'
+          headertext      = `List Ouput`
           items           = client->_bind_edit( t_tab )
           mode            = `SingleSelectMaster`
-          selectionchange = client->_event( 'SELCHANGE' )
+          selectionchange = client->_event( `SELCHANGE` )
           )->standard_list_item(
-              title       = '{TITLE}'
-              description = '{DESCR}'
-              icon        = '{ICON}'
-              info        = '{INFO}'
-              press       = client->_event( 'TEST' )
+              title       = `{TITLE}`
+              description = `{DESCR}`
+              icon        = `{ICON}`
+              info        = `{INFO}`
+              press       = client->_event( `TEST` )
               selected    = `{SELECTED}` ).
 
       client->view_display( view->stringify( ) ).
 
+    ELSEIF client->check_on_event( `SELCHANGE` ).
+      client->message_box_display( `go to details for item ` && t_tab[ selected = abap_true ]-title ).
     ENDIF.
 
-    CASE client->get( )-event.
-
-      WHEN 'SELCHANGE'.
-        client->message_box_display( `go to details for item ` && t_tab[ selected = abap_true ]-title ).
-    ENDCASE.
-
   ENDMETHOD.
+
 ENDCLASS.

From aa2d4ec1c3febb3c904d2b881b33824f66504451 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Sun, 15 Mar 2026 14:29:49 +0000
Subject: [PATCH 04/14] Add ty_s_/ty_t_ type naming convention and apply to app
 003

Update CLAUDE.md: structure types use ty_s_ prefix, table types use ty_t_,
and no blank line between a TYPES definition and its DATA declaration.
Rename ty_row to ty_s_row, add ty_t_tab type, and update DATA declaration
in app 003 accordingly.

https://claude.ai/code/session_01GVUQCR1XcJbdSPwHfUzoZB
---
 CLAUDE.md                           | 2 ++
 src/z2ui5_cl_demo_app_003.clas.abap | 8 ++++----
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/CLAUDE.md b/CLAUDE.md
index 6beda517..a43d8dea 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -34,6 +34,8 @@ All serialized files (`.abap`, `.xml`, and any other abapGit-managed file types)
 - Use backticks for all string literals, not single quotes.
 - Prefer functional to procedural language constructs — use `var = VALUE #( ).` to reset a variable, never `CLEAR var.`.
 - Use type prefixes only for tables and structures: prefix table variables/attributes with `t_` (e.g. `t_items`) and structure variables/attributes with `s_` (e.g. `s_screen`). Do not add prefixes to scalar variables or object references.
+- Name local types with a `ty_s_` prefix for structure types (e.g. `ty_s_row`) and `ty_t_` for table types (e.g. `ty_t_rows`).
+- No blank line between a `TYPES` definition and the `DATA` declaration that directly uses it.
 - Class names are always written in **lowercase** in both `DEFINITION` and `IMPLEMENTATION` — never uppercase.
 - Classes are **not** `FINAL` — do not add the `FINAL` keyword to class definitions.
 - Use `DEFINITION PUBLIC.` — never `DEFINITION PUBLIC CREATE PUBLIC.` (`CREATE PUBLIC` is the default and adds unnecessary overhead).
diff --git a/src/z2ui5_cl_demo_app_003.clas.abap b/src/z2ui5_cl_demo_app_003.clas.abap
index e77f1332..206b4bdb 100644
--- a/src/z2ui5_cl_demo_app_003.clas.abap
+++ b/src/z2ui5_cl_demo_app_003.clas.abap
@@ -4,7 +4,7 @@ CLASS z2ui5_cl_demo_app_003 DEFINITION PUBLIC.
     INTERFACES z2ui5_if_app.
 
     TYPES:
-      BEGIN OF ty_row,
+      BEGIN OF ty_s_row,
         title    TYPE string,
         value    TYPE string,
         descr    TYPE string,
@@ -12,9 +12,9 @@ CLASS z2ui5_cl_demo_app_003 DEFINITION PUBLIC.
         info     TYPE string,
         selected TYPE abap_bool,
         checkbox TYPE abap_bool,
-      END OF ty_row.
-
-    DATA t_tab TYPE STANDARD TABLE OF ty_row WITH EMPTY KEY.
+      END OF ty_s_row.
+    TYPES ty_t_tab TYPE STANDARD TABLE OF ty_s_row WITH EMPTY KEY.
+    DATA t_tab TYPE ty_t_tab.
 
   PROTECTED SECTION.
   PRIVATE SECTION.

From 0c5e1163817cfc125d3fe3f3f52fd632d9d7ac93 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Sun, 15 Mar 2026 14:31:14 +0000
Subject: [PATCH 05/14] Only define ty_t_ table type when used more than once

Update rule in CLAUDE.md and simplify app 003: since t_tab is used only
once, replace the ty_t_tab type definition with an inline STANDARD TABLE OF
declaration directly on the DATA attribute.

https://claude.ai/code/session_01GVUQCR1XcJbdSPwHfUzoZB
---
 CLAUDE.md                           | 2 +-
 src/z2ui5_cl_demo_app_003.clas.abap | 3 +--
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/CLAUDE.md b/CLAUDE.md
index a43d8dea..384428bf 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -34,7 +34,7 @@ All serialized files (`.abap`, `.xml`, and any other abapGit-managed file types)
 - Use backticks for all string literals, not single quotes.
 - Prefer functional to procedural language constructs — use `var = VALUE #( ).` to reset a variable, never `CLEAR var.`.
 - Use type prefixes only for tables and structures: prefix table variables/attributes with `t_` (e.g. `t_items`) and structure variables/attributes with `s_` (e.g. `s_screen`). Do not add prefixes to scalar variables or object references.
-- Name local types with a `ty_s_` prefix for structure types (e.g. `ty_s_row`) and `ty_t_` for table types (e.g. `ty_t_rows`).
+- Name local types with a `ty_s_` prefix for structure types (e.g. `ty_s_row`) and `ty_t_` for table types (e.g. `ty_t_rows`). Only define a `ty_t_` table type when it is used more than once — for a single-use table, declare it inline with `STANDARD TABLE OF ty_s_xxx`.
 - No blank line between a `TYPES` definition and the `DATA` declaration that directly uses it.
 - Class names are always written in **lowercase** in both `DEFINITION` and `IMPLEMENTATION` — never uppercase.
 - Classes are **not** `FINAL` — do not add the `FINAL` keyword to class definitions.
diff --git a/src/z2ui5_cl_demo_app_003.clas.abap b/src/z2ui5_cl_demo_app_003.clas.abap
index 206b4bdb..1ffc11f5 100644
--- a/src/z2ui5_cl_demo_app_003.clas.abap
+++ b/src/z2ui5_cl_demo_app_003.clas.abap
@@ -13,8 +13,7 @@ CLASS z2ui5_cl_demo_app_003 DEFINITION PUBLIC.
         selected TYPE abap_bool,
         checkbox TYPE abap_bool,
       END OF ty_s_row.
-    TYPES ty_t_tab TYPE STANDARD TABLE OF ty_s_row WITH EMPTY KEY.
-    DATA t_tab TYPE ty_t_tab.
+    DATA t_tab TYPE STANDARD TABLE OF ty_s_row WITH EMPTY KEY.
 
   PROTECTED SECTION.
   PRIVATE SECTION.

From 5e64a7b4ea28e03fac0b9906bb4e2982e56463a0 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Sun, 15 Mar 2026 14:32:43 +0000
Subject: [PATCH 06/14] Use string templates instead of && concatenation in app
 003 and CLAUDE.md

Replace && with string template |...{ }...| in app 003 message call.
Add rule to CLAUDE.md: always prefer string templates over && operator.

https://claude.ai/code/session_01GVUQCR1XcJbdSPwHfUzoZB
---
 CLAUDE.md                           | 1 +
 src/z2ui5_cl_demo_app_003.clas.abap | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/CLAUDE.md b/CLAUDE.md
index 384428bf..b1898c40 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -32,6 +32,7 @@ All serialized files (`.abap`, `.xml`, and any other abapGit-managed file types)
 - Follow the [SAP ABAP Style Guide](https://github.com/SAP/styleguides/blob/main/clean-abap/CleanABAP.md).
 - Never use an init flag attribute (`check_initialized`, `mv_init`, `is_initialized`, etc.). Always use `client->check_on_init( )` instead.
 - Use backticks for all string literals, not single quotes.
+- Use string templates (`|...|` with `{ }` for embedded expressions) instead of `&&` for string concatenation (e.g. `|item { name }|` not `` `item ` && name ``).
 - Prefer functional to procedural language constructs — use `var = VALUE #( ).` to reset a variable, never `CLEAR var.`.
 - Use type prefixes only for tables and structures: prefix table variables/attributes with `t_` (e.g. `t_items`) and structure variables/attributes with `s_` (e.g. `s_screen`). Do not add prefixes to scalar variables or object references.
 - Name local types with a `ty_s_` prefix for structure types (e.g. `ty_s_row`) and `ty_t_` for table types (e.g. `ty_t_rows`). Only define a `ty_t_` table type when it is used more than once — for a single-use table, declare it inline with `STANDARD TABLE OF ty_s_xxx`.
diff --git a/src/z2ui5_cl_demo_app_003.clas.abap b/src/z2ui5_cl_demo_app_003.clas.abap
index 1ffc11f5..e7f5f8c5 100644
--- a/src/z2ui5_cl_demo_app_003.clas.abap
+++ b/src/z2ui5_cl_demo_app_003.clas.abap
@@ -57,7 +57,7 @@ CLASS z2ui5_cl_demo_app_003 IMPLEMENTATION.
       client->view_display( view->stringify( ) ).
 
     ELSEIF client->check_on_event( `SELCHANGE` ).
-      client->message_box_display( `go to details for item ` && t_tab[ selected = abap_true ]-title ).
+      client->message_box_display( |go to details for item { t_tab[ selected = abap_true ]-title }| ).
     ENDIF.
 
   ENDMETHOD.

From 128d7ccdbaed3e73a7e610916cfd2fdde695caad Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Sun, 15 Mar 2026 14:37:41 +0000
Subject: [PATCH 07/14] Refactor app 004 to follow code conventions

- Remove mv_ prefix: mv_view_main -> view_main
- Remove lv_ prefix: lv_dummy -> dummy
- Replace all single quotes with backticks
- Fix blank lines: class definition, between blocks, inside methods
- Replace IF/RETURN/ENDIF + CASE with proper ELSEIF chain
- Fix simple_form parameters onto separate lines
- Fix shownavbutton alignment in both view methods
- Fix indentation of grid/content/simple_form chain

https://claude.ai/code/session_01GVUQCR1XcJbdSPwHfUzoZB
---
 src/z2ui5_cl_demo_app_004.clas.abap | 120 ++++++++++++++--------------
 1 file changed, 61 insertions(+), 59 deletions(-)

diff --git a/src/z2ui5_cl_demo_app_004.clas.abap b/src/z2ui5_cl_demo_app_004.clas.abap
index 00e2787d..11ec5666 100644
--- a/src/z2ui5_cl_demo_app_004.clas.abap
+++ b/src/z2ui5_cl_demo_app_004.clas.abap
@@ -1,88 +1,86 @@
 CLASS z2ui5_cl_demo_app_004 DEFINITION PUBLIC.
 
   PUBLIC SECTION.
-
     INTERFACES z2ui5_if_app.
 
-    DATA mv_view_main TYPE string.
+    DATA view_main TYPE string.
 
   PROTECTED SECTION.
-
     METHODS z2ui5_view_main_display.
     METHODS z2ui5_view_second_display.
+
     DATA client TYPE REF TO z2ui5_if_client.
 
   PRIVATE SECTION.
 ENDCLASS.
 
 
-
 CLASS z2ui5_cl_demo_app_004 IMPLEMENTATION.
 
-
   METHOD z2ui5_if_app~main.
 
     me->client = client.
-
     IF client->check_on_init( ).
-      z2ui5_view_main_display( ).
-      client->message_box_display( 'app started, init values set' ).
-      RETURN.
-    ENDIF.
 
-    CASE client->get( )-event.
-
-      WHEN 'BUTTON_ROUNDTRIP'.
-        client->message_box_display( 'server-client roundtrip, method on_event of the abap controller was called' ).
-
-      WHEN 'BUTTON_RESTART'.
-        client->nav_app_leave( NEW z2ui5_cl_demo_app_004( ) ).
-
-      WHEN 'BUTTON_CHANGE_VIEW'.
-        CASE mv_view_main.
-          WHEN 'MAIN'.
-            z2ui5_view_second_display( ).
-          WHEN 'SECOND'.
-            z2ui5_view_main_display( ).
-        ENDCASE.
+      z2ui5_view_main_display( ).
+      client->message_box_display( `app started, init values set` ).
+
+    ELSEIF client->check_on_event( ).
+
+      CASE client->get( )-event.
+        WHEN `BUTTON_ROUNDTRIP`.
+          client->message_box_display( `server-client roundtrip, method on_event of the abap controller was called` ).
+        WHEN `BUTTON_RESTART`.
+          client->nav_app_leave( NEW z2ui5_cl_demo_app_004( ) ).
+        WHEN `BUTTON_CHANGE_VIEW`.
+          CASE view_main.
+            WHEN `MAIN`.
+              z2ui5_view_second_display( ).
+            WHEN `SECOND`.
+              z2ui5_view_main_display( ).
+          ENDCASE.
+        WHEN `BUTTON_ERROR`.
+          DATA(dummy) = 1 / 0.
+      ENDCASE.
 
-      WHEN 'BUTTON_ERROR'.
-        DATA(lv_dummy) = 1 / 0.
-    ENDCASE.
+    ENDIF.
 
   ENDMETHOD.
 
 
   METHOD z2ui5_view_main_display.
 
-    mv_view_main = 'MAIN'.
+    view_main = `MAIN`.
 
     DATA(view) = z2ui5_cl_xml_view=>factory( ).
     DATA(page) = view->shell(
         )->page(
-            title            = 'abap2UI5 - Controller'
-            navbuttonpress   = client->_event_nav_app_leave( )
-               shownavbutton = client->check_app_prev_stack( ) ).
-
-    page->grid( 'L6 M12 S12' )->content( 'layout'
-        )->simple_form( title    = 'Controller'
-                        editable = abap_true )->content( 'form'
-            )->label( 'Roundtrip'
+            title          = `abap2UI5 - Controller`
+            navbuttonpress = client->_event_nav_app_leave( )
+            shownavbutton  = client->check_app_prev_stack( ) ).
+
+    page->grid( `L6 M12 S12`
+        )->content( `layout`
+        )->simple_form(
+            title    = `Controller`
+            editable = abap_true
+            )->content( `form`
+            )->label( `Roundtrip`
             )->button(
-                text  = 'Client/Server Interaction'
-                press = client->_event( 'BUTTON_ROUNDTRIP' )
-            )->label( 'System'
+                text  = `Client/Server Interaction`
+                press = client->_event( `BUTTON_ROUNDTRIP` )
+            )->label( `System`
             )->button(
-                text  = 'Restart App'
-                press = client->_event( 'BUTTON_RESTART' )
-            )->label( 'Change View'
+                text  = `Restart App`
+                press = client->_event( `BUTTON_RESTART` )
+            )->label( `Change View`
             )->button(
-                text  = 'Display View SECOND'
-                press = client->_event( 'BUTTON_CHANGE_VIEW' )
-            )->label( 'CX_SY_ZERO_DIVIDE'
+                text  = `Display View SECOND`
+                press = client->_event( `BUTTON_CHANGE_VIEW` )
+            )->label( `CX_SY_ZERO_DIVIDE`
             )->button(
-                text  = 'Error not catched by the user'
-                press = client->_event( 'BUTTON_ERROR' ) ).
+                text  = `Error not catched by the user`
+                press = client->_event( `BUTTON_ERROR` ) ).
 
     client->view_display( view->stringify( ) ).
 
@@ -91,22 +89,26 @@ CLASS z2ui5_cl_demo_app_004 IMPLEMENTATION.
 
   METHOD z2ui5_view_second_display.
 
-    mv_view_main = 'SECOND'.
+    view_main = `SECOND`.
 
     DATA(view) = z2ui5_cl_xml_view=>factory( ).
-    DATA(page) = view->shell( )->page(
-      title          = 'abap2UI5 - Controller'
-      navbuttonpress = client->_event_nav_app_leave( )
-      shownavbutton  = client->check_app_prev_stack( ) ).
-
-    page->grid( 'L12 M12 S12' )->content( 'layout'
-        )->simple_form( 'View Second' )->content( 'form'
-            )->label( 'Change View'
+    DATA(page) = view->shell(
+        )->page(
+            title          = `abap2UI5 - Controller`
+            navbuttonpress = client->_event_nav_app_leave( )
+            shownavbutton  = client->check_app_prev_stack( ) ).
+
+    page->grid( `L12 M12 S12`
+        )->content( `layout`
+        )->simple_form( `View Second`
+            )->content( `form`
+            )->label( `Change View`
             )->button(
-                text  = 'Display View MAIN'
-                press = client->_event( 'BUTTON_CHANGE_VIEW' ) ).
+                text  = `Display View MAIN`
+                press = client->_event( `BUTTON_CHANGE_VIEW` ) ).
 
     client->view_display( view->stringify( ) ).
 
   ENDMETHOD.
+
 ENDCLASS.

From 1e8943406fa5f544498644e39c880e99e6c44047 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Sun, 15 Mar 2026 14:39:42 +0000
Subject: [PATCH 08/14] Move client declaration to top of PROTECTED SECTION in
 app 004 and CLAUDE.md

Add rule: DATA client always comes first in PROTECTED SECTION, before any
METHODS declarations. Fix app 004 accordingly.

https://claude.ai/code/session_01GVUQCR1XcJbdSPwHfUzoZB
---
 CLAUDE.md                           | 1 +
 src/z2ui5_cl_demo_app_004.clas.abap | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/CLAUDE.md b/CLAUDE.md
index b1898c40..ac8b3e9f 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -41,6 +41,7 @@ All serialized files (`.abap`, `.xml`, and any other abapGit-managed file types)
 - Classes are **not** `FINAL` — do not add the `FINAL` keyword to class definitions.
 - Use `DEFINITION PUBLIC.` — never `DEFINITION PUBLIC CREATE PUBLIC.` (`CREATE PUBLIC` is the default and adds unnecessary overhead).
 - Always include `PROTECTED SECTION.` and `PRIVATE SECTION.` in the class definition, even if empty.
+- In `PROTECTED SECTION.`, always declare `DATA client TYPE REF TO z2ui5_if_client.` first, before any `METHODS` declarations.
 - **Blank lines — class definition** (`EMPTY_LINES_IN_CLASS_DEFINITION`):
   - Add one blank line above each section keyword (`PUBLIC SECTION.`, `PROTECTED SECTION.`, `PRIVATE SECTION.`) — unless the preceding section is empty.
   - No blank line directly below a section keyword.
diff --git a/src/z2ui5_cl_demo_app_004.clas.abap b/src/z2ui5_cl_demo_app_004.clas.abap
index 11ec5666..3284bccd 100644
--- a/src/z2ui5_cl_demo_app_004.clas.abap
+++ b/src/z2ui5_cl_demo_app_004.clas.abap
@@ -6,11 +6,11 @@ CLASS z2ui5_cl_demo_app_004 DEFINITION PUBLIC.
     DATA view_main TYPE string.
 
   PROTECTED SECTION.
+    DATA client TYPE REF TO z2ui5_if_client.
+
     METHODS z2ui5_view_main_display.
     METHODS z2ui5_view_second_display.
 
-    DATA client TYPE REF TO z2ui5_if_client.
-
   PRIVATE SECTION.
 ENDCLASS.
 

From 87d1b3635b0a776518f118aece220be2877de2e6 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Sun, 15 Mar 2026 14:40:03 +0000
Subject: [PATCH 09/14] Generalize declaration order rule: TYPES then DATA then
 METHODS

Replace the client-specific rule with a general ordering rule that applies
to all sections: TYPES declarations first, then DATA, then METHODS.

https://claude.ai/code/session_01GVUQCR1XcJbdSPwHfUzoZB
---
 CLAUDE.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CLAUDE.md b/CLAUDE.md
index ac8b3e9f..0f72b65a 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -41,7 +41,7 @@ All serialized files (`.abap`, `.xml`, and any other abapGit-managed file types)
 - Classes are **not** `FINAL` — do not add the `FINAL` keyword to class definitions.
 - Use `DEFINITION PUBLIC.` — never `DEFINITION PUBLIC CREATE PUBLIC.` (`CREATE PUBLIC` is the default and adds unnecessary overhead).
 - Always include `PROTECTED SECTION.` and `PRIVATE SECTION.` in the class definition, even if empty.
-- In `PROTECTED SECTION.`, always declare `DATA client TYPE REF TO z2ui5_if_client.` first, before any `METHODS` declarations.
+- In every section (`PUBLIC SECTION.`, `PROTECTED SECTION.`), always follow this declaration order: `TYPES` first, then `DATA`, then `METHODS`.
 - **Blank lines — class definition** (`EMPTY_LINES_IN_CLASS_DEFINITION`):
   - Add one blank line above each section keyword (`PUBLIC SECTION.`, `PROTECTED SECTION.`, `PRIVATE SECTION.`) — unless the preceding section is empty.
   - No blank line directly below a section keyword.

From 79c9cd773d0b50313200c150e30c16a923c61648 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Sun, 15 Mar 2026 14:41:09 +0000
Subject: [PATCH 10/14] Add rule: extract on_init and on_event when main grows
 too large
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

When logic no longer fits in main, always extract on_init and on_event
first — never use other method names for this purpose.

https://claude.ai/code/session_01GVUQCR1XcJbdSPwHfUzoZB
---
 CLAUDE.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/CLAUDE.md b/CLAUDE.md
index 0f72b65a..de79123e 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -272,6 +272,8 @@ Write everything directly in `main` — no method encapsulation needed. Count on
 
 ### Larger apps — canonical template
 
+When the logic no longer fits inside `main`, always extract exactly `on_init` and `on_event` as the first step — never use other method names for this purpose. `main` then becomes a pure dispatcher that calls these two methods. Only add further methods (`view_display`, `data_read`, etc.) when they are actually needed.
+
 The following is the **maximum structure**. Only add methods that are actually needed.
 
 ### Event handler sub-methods

From 20010764177f21ad144ced463bf52c9fab7262f1 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Sun, 15 Mar 2026 14:43:12 +0000
Subject: [PATCH 11/14] Refactor app 004: extract on_init and on_event, clean
 up method names

Extract on_init and on_event from main, making main a pure dispatcher.
Rename z2ui5_view_main_display/z2ui5_view_second_display to
view_main_display/view_second_display.

https://claude.ai/code/session_01GVUQCR1XcJbdSPwHfUzoZB
---
 src/z2ui5_cl_demo_app_004.clas.abap | 58 +++++++++++++++++------------
 1 file changed, 35 insertions(+), 23 deletions(-)

diff --git a/src/z2ui5_cl_demo_app_004.clas.abap b/src/z2ui5_cl_demo_app_004.clas.abap
index 3284bccd..b742a96a 100644
--- a/src/z2ui5_cl_demo_app_004.clas.abap
+++ b/src/z2ui5_cl_demo_app_004.clas.abap
@@ -8,8 +8,10 @@ CLASS z2ui5_cl_demo_app_004 DEFINITION PUBLIC.
   PROTECTED SECTION.
     DATA client TYPE REF TO z2ui5_if_client.
 
-    METHODS z2ui5_view_main_display.
-    METHODS z2ui5_view_second_display.
+    METHODS on_init.
+    METHODS on_event.
+    METHODS view_main_display.
+    METHODS view_second_display.
 
   PRIVATE SECTION.
 ENDCLASS.
@@ -21,34 +23,44 @@ CLASS z2ui5_cl_demo_app_004 IMPLEMENTATION.
 
     me->client = client.
     IF client->check_on_init( ).
+      on_init( ).
+    ELSEIF client->check_on_event( ).
+      on_event( ).
+    ENDIF.
 
-      z2ui5_view_main_display( ).
-      client->message_box_display( `app started, init values set` ).
+  ENDMETHOD.
 
-    ELSEIF client->check_on_event( ).
 
-      CASE client->get( )-event.
-        WHEN `BUTTON_ROUNDTRIP`.
-          client->message_box_display( `server-client roundtrip, method on_event of the abap controller was called` ).
-        WHEN `BUTTON_RESTART`.
-          client->nav_app_leave( NEW z2ui5_cl_demo_app_004( ) ).
-        WHEN `BUTTON_CHANGE_VIEW`.
-          CASE view_main.
-            WHEN `MAIN`.
-              z2ui5_view_second_display( ).
-            WHEN `SECOND`.
-              z2ui5_view_main_display( ).
-          ENDCASE.
-        WHEN `BUTTON_ERROR`.
-          DATA(dummy) = 1 / 0.
-      ENDCASE.
+  METHOD on_init.
 
-    ENDIF.
+    view_main_display( ).
+    client->message_box_display( `app started, init values set` ).
+
+  ENDMETHOD.
+
+
+  METHOD on_event.
+
+    CASE client->get( )-event.
+      WHEN `BUTTON_ROUNDTRIP`.
+        client->message_box_display( `server-client roundtrip, method on_event of the abap controller was called` ).
+      WHEN `BUTTON_RESTART`.
+        client->nav_app_leave( NEW z2ui5_cl_demo_app_004( ) ).
+      WHEN `BUTTON_CHANGE_VIEW`.
+        CASE view_main.
+          WHEN `MAIN`.
+            view_second_display( ).
+          WHEN `SECOND`.
+            view_main_display( ).
+        ENDCASE.
+      WHEN `BUTTON_ERROR`.
+        DATA(dummy) = 1 / 0.
+    ENDCASE.
 
   ENDMETHOD.
 
 
-  METHOD z2ui5_view_main_display.
+  METHOD view_main_display.
 
     view_main = `MAIN`.
 
@@ -87,7 +99,7 @@ CLASS z2ui5_cl_demo_app_004 IMPLEMENTATION.
   ENDMETHOD.
 
 
-  METHOD z2ui5_view_second_display.
+  METHOD view_second_display.
 
     view_main = `SECOND`.
 

From f4beb46147d2aeb30fcf28f5818dc85c1607f24b Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Sun, 15 Mar 2026 14:45:38 +0000
Subject: [PATCH 12/14] Fix two inconsistencies in CLAUDE.md examples

- Back Navigation example: fix view->page() to use shell()->page() chain
  with parameters split across lines per multi-parameter rule
- Canonical template: add missing blank line between DATA client and
  METHODS group in PROTECTED SECTION

https://claude.ai/code/session_01GVUQCR1XcJbdSPwHfUzoZB
---
 CLAUDE.md | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/CLAUDE.md b/CLAUDE.md
index de79123e..fdecab57 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -142,9 +142,11 @@ Always use `client->_event_nav_app_leave()` to bind the back button event direct
 METHOD view_display.
 
   DATA(view) = z2ui5_cl_xml_view=>factory( ).
-  DATA(page) = view->page( title = `My App`
-                            shownavbutton = client->check_app_prev_stack( )
-                            navbuttonpress = client->_event_nav_app_leave( ) ).
+  DATA(page) = view->shell(
+      )->page(
+          title          = `My App`
+          shownavbutton  = client->check_app_prev_stack( )
+          navbuttonpress = client->_event_nav_app_leave( ) ).
   " ...
   client->view_display( view->stringify( ) ).
 
@@ -287,6 +289,7 @@ CLASS z2ui5_cl_app_xxx DEFINITION PUBLIC.
     " bound data (DATA attributes for _bind/_bind_edit)...
   PROTECTED SECTION.
     DATA client TYPE REF TO z2ui5_if_client.
+
     METHODS on_init.        " first call: load data, display view
     METHODS on_event.       " user triggered an event
     METHODS on_navigation.  " returned from sub-app or popup

From 8a3a07e4c89c5ffd12b78a0ce79a3d7c77777a8f Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Sun, 15 Mar 2026 14:48:57 +0000
Subject: [PATCH 13/14] Refactor app 006 to follow code conventions

- Rename ty_row to ty_s_row, mv_key to key
- Move refresh_data and new methods to PROTECTED SECTION
- Add DATA client to PROTECTED SECTION
- Extract on_init, on_event, view_display from main
- Replace IF/ENDIF + CASE with ELSEIF dispatcher in main
- Replace DO loop with functional VALUE #( FOR ... ) in refresh_data
- Replace all single quotes with backticks
- Fix scroll_container and items/cells chain indentation and parameter formatting

https://claude.ai/code/session_01GVUQCR1XcJbdSPwHfUzoZB
---
 src/z2ui5_cl_demo_app_006.clas.abap | 148 ++++++++++++++++------------
 1 file changed, 87 insertions(+), 61 deletions(-)

diff --git a/src/z2ui5_cl_demo_app_006.clas.abap b/src/z2ui5_cl_demo_app_006.clas.abap
index 72312b2b..7e401469 100644
--- a/src/z2ui5_cl_demo_app_006.clas.abap
+++ b/src/z2ui5_cl_demo_app_006.clas.abap
@@ -1,11 +1,10 @@
 CLASS z2ui5_cl_demo_app_006 DEFINITION PUBLIC.
 
   PUBLIC SECTION.
-
     INTERFACES z2ui5_if_app.
 
     TYPES:
-      BEGIN OF ty_row,
+      BEGIN OF ty_s_row,
         count      TYPE i,
         value      TYPE string,
         descr      TYPE string,
@@ -14,119 +13,146 @@ CLASS z2ui5_cl_demo_app_006 DEFINITION PUBLIC.
         checkbox   TYPE abap_bool,
         percentage TYPE p LENGTH 5 DECIMALS 2,
         valuecolor TYPE string,
-      END OF ty_row.
-
-    DATA t_tab TYPE STANDARD TABLE OF ty_row WITH EMPTY KEY.
+      END OF ty_s_row.
+    DATA t_tab TYPE STANDARD TABLE OF ty_s_row WITH EMPTY KEY.
 
     DATA check_ui5 TYPE abap_bool.
-    DATA mv_key TYPE string.
-    METHODS refresh_data.
+    DATA key       TYPE string.
 
   PROTECTED SECTION.
+    DATA client TYPE REF TO z2ui5_if_client.
+
+    METHODS on_init.
+    METHODS on_event.
+    METHODS view_display.
+    METHODS refresh_data.
+
   PRIVATE SECTION.
 ENDCLASS.
 
 
 CLASS z2ui5_cl_demo_app_006 IMPLEMENTATION.
 
+  METHOD z2ui5_if_app~main.
 
-  METHOD refresh_data.
-
-    DO 10000 TIMES.
-      DATA ls_row TYPE ty_row.
-      ls_row-count = sy-index.
-      ls_row-value = 'red'.
-      ls_row-descr = 'this is a description'.
-      ls_row-checkbox = abap_true.
-      ls_row-valuecolor = `Good`.
-      INSERT ls_row INTO TABLE t_tab.
-    ENDDO.
+    me->client = client.
+    IF client->check_on_init( ).
+      on_init( ).
+    ELSEIF client->check_on_event( ).
+      on_event( ).
+    ENDIF.
 
   ENDMETHOD.
 
 
-  METHOD z2ui5_if_app~main.
+  METHOD on_init.
 
-    IF client->check_on_init( ).
-      refresh_data( ).
-    ENDIF.
+    refresh_data( ).
+    view_display( ).
 
-    CASE client->get( )-event.
+  ENDMETHOD.
 
-      WHEN 'SORT_ASCENDING'.
-        SORT t_tab BY count ASCENDING.
-        client->message_toast_display( 'sort ascending' ).
 
-      WHEN 'SORT_DESCENDING'.
+  METHOD on_event.
+
+    CASE client->get( )-event.
+      WHEN `SORT_ASCENDING`.
+        SORT t_tab BY count ASCENDING.
+        client->message_toast_display( `sort ascending` ).
+      WHEN `SORT_DESCENDING`.
         SORT t_tab BY count DESCENDING.
-        client->message_toast_display( 'sort descending' ).
+        client->message_toast_display( `sort descending` ).
     ENDCASE.
 
+    view_display( ).
+
+  ENDMETHOD.
+
+
+  METHOD refresh_data.
+
+    t_tab = VALUE #( FOR i = 1 UNTIL i > 10000 (
+        count      = i
+        value      = `red`
+        descr      = `this is a description`
+        checkbox   = abap_true
+        valuecolor = `Good` ) ).
+
+  ENDMETHOD.
+
+
+  METHOD view_display.
+
     DATA(view) = z2ui5_cl_xml_view=>factory( ).
     DATA(page) = view->shell(
         )->page(
-            title          = 'abap2UI5 - Scroll Container with Table and Toolbar'
+            title          = `abap2UI5 - Scroll Container with Table and Toolbar`
             navbuttonpress = client->_event_nav_app_leave( )
             shownavbutton  = client->check_app_prev_stack( ) ).
 
-    DATA(tab) = page->scroll_container( height   = '70%'
-                                        vertical = abap_true
+    DATA(tab) = page->scroll_container(
+        height   = `70%`
+        vertical = abap_true
         )->table(
             growing             = abap_true
-            growingthreshold    = '20'
+            growingthreshold    = `20`
             growingscrolltoload = abap_true
             items               = client->_bind_edit( t_tab )
-            sticky              = 'ColumnHeaders,HeaderToolbar' ).
+            sticky              = `ColumnHeaders,HeaderToolbar` ).
 
     tab->header_toolbar(
         )->toolbar(
-            )->title( 'title of the table'
+            )->title( `title of the table`
             )->button(
-                text  = 'letf side button'
-                icon  = 'sap-icon://account'
-                press = client->_event( 'BUTTON_SORT' )
-            )->segmented_button( mv_key
+                text  = `letf side button`
+                icon  = `sap-icon://account`
+                press = client->_event( `BUTTON_SORT` )
+            )->segmented_button( key
                 )->items(
                     )->segmented_button_item(
-                        key  = 'BLUE'
-                        icon = 'sap-icon://accept'
-                        text = 'blue'
+                        key  = `BLUE`
+                        icon = `sap-icon://accept`
+                        text = `blue`
                     )->segmented_button_item(
-                        key  = 'GREEN'
-                        icon = 'sap-icon://add-favorite'
-                        text = 'green'
+                        key  = `GREEN`
+                        icon = `sap-icon://add-favorite`
+                        text = `green`
             )->get_parent( )->get_parent(
             )->toolbar_spacer(
             )->button(
-                icon  = 'sap-icon://sort-descending'
-                press = client->_event( 'SORT_DESCENDING' )
+                icon  = `sap-icon://sort-descending`
+                press = client->_event( `SORT_DESCENDING` )
             )->button(
-                icon  = 'sap-icon://sort-ascending'
-                press = client->_event( 'SORT_ASCENDING' ) ).
+                icon  = `sap-icon://sort-ascending`
+                press = client->_event( `SORT_ASCENDING` ) ).
 
     tab->columns(
         )->column(
-            )->text( 'Color' )->get_parent(
+            )->text( `Color` )->get_parent(
         )->column(
-            )->text( 'Info' )->get_parent(
+            )->text( `Info` )->get_parent(
         )->column(
-            )->text( 'Description' )->get_parent(
+            )->text( `Description` )->get_parent(
         )->column(
-            )->text( 'Checkbox' )->get_parent(
+            )->text( `Checkbox` )->get_parent(
         )->column(
-            )->text( 'Counter' )->get_parent(
+            )->text( `Counter` )->get_parent(
         )->column(
-            )->text( 'Radial Micro Chart' ).
-
-    tab->items( )->column_list_item( )->cells(
-       )->text( '{VALUE}'
-       )->text( '{INFO}'
-       )->text( '{DESCR}'
-       )->checkbox( selected = '{CHECKBOX}'
+            )->text( `Radial Micro Chart` ).
+
+    tab->items(
+        )->column_list_item(
+            )->cells(
+                )->text( `{VALUE}`
+                )->text( `{INFO}`
+                )->text( `{DESCR}`
+                )->checkbox(
+                    selected = `{CHECKBOX}`
                     enabled  = abap_false
-       )->text( '{COUNT}' ).
+                )->text( `{COUNT}` ).
 
     client->view_display( view->stringify( ) ).
 
   ENDMETHOD.
+
 ENDCLASS.

From b583775d3f43d646bf969a0adff03c3bf62bdf21 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Sun, 15 Mar 2026 15:06:31 +0000
Subject: [PATCH 14/14] Refactor app 005 to follow code conventions

- Fix blank lines in class definition and between blocks
- Replace IF/ENDIF + CASE with ELSEIF chain (single event)
- Replace all single quotes with backticks
- Fix shownavbutton alignment
- Split simple_form parameters onto separate lines
- Fix grid->content chain indentation

https://claude.ai/code/session_01GVUQCR1XcJbdSPwHfUzoZB
---
 src/z2ui5_cl_demo_app_005.clas.abap | 55 ++++++++++++++---------------
 1 file changed, 27 insertions(+), 28 deletions(-)

diff --git a/src/z2ui5_cl_demo_app_005.clas.abap b/src/z2ui5_cl_demo_app_005.clas.abap
index db72df05..0767f793 100644
--- a/src/z2ui5_cl_demo_app_005.clas.abap
+++ b/src/z2ui5_cl_demo_app_005.clas.abap
@@ -1,60 +1,59 @@
 CLASS z2ui5_cl_demo_app_005 DEFINITION PUBLIC.
 
   PUBLIC SECTION.
-
     INTERFACES z2ui5_if_app.
 
     DATA value1 TYPE int4.
     DATA value2 TYPE int4.
+
   PROTECTED SECTION.
   PRIVATE SECTION.
 ENDCLASS.
 
 
-
 CLASS z2ui5_cl_demo_app_005 IMPLEMENTATION.
 
-
   METHOD z2ui5_if_app~main.
 
     IF client->check_on_init( ).
+
       value1 = 10.
       value2 = 90.
-    ENDIF.
 
-    CASE client->get( )-event.
-      WHEN 'SLIDER_CHANGE'.
-
-        client->message_toast_display( |Range Slider { cl_abap_char_utilities=>newline }value1 { value1 } { cl_abap_char_utilities=>newline }value2 { value2 }| ).
-
-    ENDCASE.
+    ELSEIF client->check_on_event( `SLIDER_CHANGE` ).
+      client->message_toast_display( |Range Slider { cl_abap_char_utilities=>newline }value1 { value1 } { cl_abap_char_utilities=>newline }value2 { value2 }| ).
+    ENDIF.
 
     DATA(view) = z2ui5_cl_xml_view=>factory( ).
     DATA(page) = view->shell(
         )->page(
-                title          = 'abap2UI5 - Range Slider Example'
-                navbuttonpress = client->_event_nav_app_leave( )
-                 shownavbutton = client->check_app_prev_stack( ) ).
-
-    DATA(grid) = page->grid( 'L12 M12 S12' )->content( 'layout' ).
-
-    grid->simple_form( title    = 'More Controls'
-                       editable = abap_true )->content( 'form'
-        )->label( 'Range Slider'
+            title          = `abap2UI5 - Range Slider Example`
+            navbuttonpress = client->_event_nav_app_leave( )
+            shownavbutton  = client->check_app_prev_stack( ) ).
+
+    DATA(grid) = page->grid( `L12 M12 S12`
+        )->content( `layout` ).
+
+    grid->simple_form(
+        title    = `More Controls`
+        editable = abap_true
+        )->content( `form`
+        )->label( `Range Slider`
         )->range_slider(
-            max           = '100'
-            min           = '0'
-            step          = '10'
-            startvalue    = '10'
-            endvalue      = '20'
+            max           = `100`
+            min           = `0`
+            step          = `10`
+            startvalue    = `10`
+            endvalue      = `20`
             showtickmarks = abap_true
-            labelinterval = '2'
-            width         = '80%'
-            class         = 'sapUiTinyMargin'
+            labelinterval = `2`
+            width         = `80%`
+            class         = `sapUiTinyMargin`
             value         = client->_bind_edit( value1 )
             value2        = client->_bind_edit( value2 )
-            change        = client->_event( 'SLIDER_CHANGE' ) ).
+            change        = client->_event( `SLIDER_CHANGE` ) ).
     client->view_display( view->stringify( ) ).
 
   ENDMETHOD.
+
 ENDCLASS.