src/app/code/community/StackExchange/DisableSearchBySku/etc/config.xml
<?xml version="1.0"?>
<config>
<modules>
<StackExchange_DisableSearchBySku>
<version>1.1.0</version>
</StackExchange_DisableSearchBySku>
</modules>
<global>
<helpers>
<stackexchange_disablesearchbysku>
<class>StackExchange_DisableSearchBySku_Helper</class>
</stackexchange_disablesearchbysku>
</helpers>
<models>
<stackexchange_disablesearchbysku>
<class>StackExchange_DisableSearchBySku_Model</class>
</stackexchange_disablesearchbysku>
</models>
</global>
<frontend>
<events>
<controller_action_layout_render_before_catalogsearch_result_index>
<observers>
<stackexchange_disablesearchbysku>
<type>singleton</type>
<class>stackexchange_disablesearchbysku/observer</class>
<method>disableSkuSearch</method>
</stackexchange_disablesearchbysku>
</observers>
</controller_action_layout_render_before_catalogsearch_result_index>
<controller_action_layout_render_before_catalogsearch_advanced_result>
<observers>
<stackexchange_disablesearchbysku>
<type>singleton</type>
<model>stackexchange_disablesearchbysku/observer</model>
<method>disableSkuSearch</method>
</stackexchange_disablesearchbysku>
</observers>
</controller_action_layout_render_before_catalogsearch_advanced_result>
</events>
</frontend>
<adminhtml>
<translate>
<modules>
<stackexchange_disablesearchbysku>
<files>
<default>StackExchange_DisableSearchBySku.csv</default>
</files>
</stackexchange_disablesearchbysku>
</modules>
</translate>
</adminhtml>
<default>
<catalog>
<frontend>
<disable_sku_search>0</disable_sku_search>
</frontend>
</catalog>
</default>
</config>