diff --git a/.claude/skills/form-compile/scripts/form-compile.ps1 b/.claude/skills/form-compile/scripts/form-compile.ps1
index 84011099..d4a95cbd 100644
--- a/.claude/skills/form-compile/scripts/form-compile.ps1
+++ b/.claude/skills/form-compile/scripts/form-compile.ps1
@@ -1,4 +1,4 @@
-# form-compile v1.121 — Compile 1C managed form from JSON or object metadata
+# form-compile v1.122 — Compile 1C managed form from JSON or object metadata
 # Source: https://github.com/Nikolay-Shirokov/cc-1c-skills
 param(
 	[string]$JsonPath,
@@ -1742,6 +1742,11 @@ function Emit-FilterItem {
 		X "$indent`t`t<v8:variant xsi:type=`"v8:${sdType}Variant`">$(Esc-Xml $variant)</v8:variant>"
 		if ($hasDate) { X "$indent`t`t<v8:date>$(Esc-Xml $dateV)</v8:date>" }
 		X "$indent`t</dcsset:right>"
+	} elseif ("$($item.value)" -eq '_') {
+		# "_" — маркер пустого значения: платформа эмитит пустой self-closing <dcsset:right>
+		# (напр. <dcsset:right xsi:type="dcscor:Field"/> — сравнение с незаданным полем).
+		$vt = if ($item.valueType) { "$($item.valueType)" } else { 'xs:string' }
+		X "$indent`t<dcsset:right xsi:type=`"$vt`"/>"
 	} elseif ($null -ne $item.value) {
 		$vt = if ($item.valueType) { "$($item.valueType)" } else { "" }
 		if (-not $vt) {
diff --git a/.claude/skills/form-compile/scripts/form-compile.py b/.claude/skills/form-compile/scripts/form-compile.py
index 635120e9..82489d99 100644
--- a/.claude/skills/form-compile/scripts/form-compile.py
+++ b/.claude/skills/form-compile/scripts/form-compile.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# form-compile v1.121 — Compile 1C managed form from JSON or object metadata
+# form-compile v1.122 — Compile 1C managed form from JSON or object metadata
 # Source: https://github.com/Nikolay-Shirokov/cc-1c-skills
 import argparse
 import copy
@@ -1483,6 +1483,11 @@ def emit_filter_item(lines, item, indent):
         if date_v is not None:
             lines.append(f'{indent}\t\t<v8:date>{esc_xml(str(date_v))}</v8:date>')
         lines.append(f'{indent}\t</dcsset:right>')
+    elif str(val) == '_':
+        # "_" — маркер пустого значения: платформа эмитит пустой self-closing <dcsset:right>
+        # (напр. <dcsset:right xsi:type="dcscor:Field"/> — сравнение с незаданным полем).
+        vt = str(item['valueType']) if item.get('valueType') else 'xs:string'
+        lines.append(f'{indent}\t<dcsset:right xsi:type="{vt}"/>')
     elif val is not None:
         vt = _value_type_for(val, item.get('valueType'))
         v_str = str(val).lower() if isinstance(val, bool) else esc_xml(str(val))
diff --git a/tests/skills/cases/form-compile/input-fields.json b/tests/skills/cases/form-compile/input-fields.json
index 606274bf..9b9ce1fa 100644
--- a/tests/skills/cases/form-compile/input-fields.json
+++ b/tests/skills/cases/form-compile/input-fields.json
@@ -77,7 +77,8 @@
       { "filter": ["ЧисловоеПоле = 1"], "appearance": { "Текст": { "field": "ОбычноеПоле" } } },
       { "filter": [{ "field": "ДатаПоля", "op": "=", "value": "3999-12-31T23:59:59" }], "appearance": { "ЦветТекста": "web:Gray" } },
       { "filter": ["ДатаПоля > 2020-01-01T00:00:00"], "appearance": { "ЦветТекста": "web:Olive" } },
-      { "filter": [{ "field": "ДатаПоля", "op": ">=", "value": "BeginningOfThisDay", "valueType": "v8:StandardBeginningDate" }], "appearance": { "ЦветТекста": "web:Silver" } }
+      { "filter": [{ "field": "ДатаПоля", "op": ">=", "value": "BeginningOfThisDay", "valueType": "v8:StandardBeginningDate" }], "appearance": { "ЦветТекста": "web:Silver" } },
+      { "filter": [{ "field": "ОбычноеПоле", "op": "=", "value": "_", "valueType": "dcscor:Field" }], "appearance": { "ЦветТекста": "web:Maroon" } }
     ]
   }
 }
diff --git a/tests/skills/cases/form-compile/snapshots/input-fields/DataProcessors/ПоляВвода/Forms/Форма/Ext/Form.xml b/tests/skills/cases/form-compile/snapshots/input-fields/DataProcessors/ПоляВвода/Forms/Форма/Ext/Form.xml
index 05b50d80..737594da 100644
--- a/tests/skills/cases/form-compile/snapshots/input-fields/DataProcessors/ПоляВвода/Forms/Форма/Ext/Form.xml
+++ b/tests/skills/cases/form-compile/snapshots/input-fields/DataProcessors/ПоляВвода/Forms/Форма/Ext/Form.xml
@@ -776,6 +776,22 @@
 					</dcscor:item>
 				</dcsset:appearance>
 			</dcsset:item>
+			<dcsset:item>
+				<dcsset:selection/>
+				<dcsset:filter>
+					<dcsset:item xsi:type="dcsset:FilterItemComparison">
+						<dcsset:left xsi:type="dcscor:Field">ОбычноеПоле</dcsset:left>
+						<dcsset:comparisonType>Equal</dcsset:comparisonType>
+						<dcsset:right xsi:type="dcscor:Field"/>
+					</dcsset:item>
+				</dcsset:filter>
+				<dcsset:appearance>
+					<dcscor:item xsi:type="dcsset:SettingsParameterValue">
+						<dcscor:parameter>ЦветТекста</dcscor:parameter>
+						<dcscor:value xsi:type="v8ui:Color">web:Maroon</dcscor:value>
+					</dcscor:item>
+				</dcsset:appearance>
+			</dcsset:item>
 		</ConditionalAppearance>
 	</Attributes>
 </Form>