diff --git a/DESIGN.md b/DESIGN.md
index ae54ae5..ff0e8dc 100644
--- a/DESIGN.md
+++ b/DESIGN.md
@@ -102,7 +102,7 @@ const filters = parseFilters(
 
 | # | 决策 |
 |---|------|
-| 40 | 支持 **`setFilters()` / `loadFilters()`** 回填 |
+| 40 | 回填能力在 **component 侧**（`setFilters()` / `loadFilters()` / `reset()` ref API，见 component DESIGN 输出协议）；middleware 只做单向解析 |
 | 41 | 多函数导出：`parseFilters` / `toTree` / `mapOperators` / `splitMultiValue` 等 |
 
 ### 导出函数
diff --git a/test/parseFilters.test.js b/test/parseFilters.test.js
index 81dfc69..a31762f 100644
--- a/test/parseFilters.test.js
+++ b/test/parseFilters.test.js
@@ -106,6 +106,80 @@ describe('parseFilters', () => {
     );
     expect(out[0].logic).toBeUndefined();
   });
+
+  it('supports tree mode', () => {
+    const out = parseFilters(
+      [
+        { field: 'name', value: 'a', query: 'EQ' },
+        { field: 'status', value: 'b', query: 'EQ', logic: 'OR' },
+      ],
+      { allowedFields, mode: 'tree' },
+    );
+    expect(out).toHaveLength(1);
+    expect(out[0].logic).toBe('OR');
+    expect(out[0].children).toHaveLength(2);
+  });
+
+  it('skips unknown fields when unknownField is skip', () => {
+    const out = parseFilters(
+      [
+        { field: 'unknown', value: 'x', query: 'EQ' },
+        { field: 'name', value: 'a', query: 'EQ' },
+      ],
+      { allowedFields, unknownField: 'skip' },
+    );
+    expect(out).toHaveLength(1);
+    expect(out[0].field).toBe('name');
+  });
+
+  it('throws aggregated errors in strict mode', () => {
+    expect(() =>
+      parseFilters(
+        [
+          { value: 'x', query: 'EQ' }, // missing field
+          'not-an-object',
+        ],
+        { allowedFields, strict: true },
+      ),
+    ).toThrow(/validation error/);
+  });
+
+  it('merges custom operatorMap', () => {
+    const out = parseFilters(
+      [{ field: 'name', value: 'x', query: 'EQ' }],
+      { allowedFields, operatorMap: { EQ: 'equals' } },
+    );
+    expect(out[0].op).toBe('equals');
+  });
+
+  it('respects custom skipFlags', () => {
+    const out = parseFilters(
+      [
+        { field: 'name', value: 'a', query: 'EQ', readOnly: true },
+        { field: 'status', value: 'b', query: 'EQ' },
+      ],
+      { allowedFields, skipFlags: ['readOnly'] },
+    );
+    expect(out).toHaveLength(1);
+    expect(out[0].field).toBe('status');
+  });
+
+  it('does not emit values for scalar queries', () => {
+    const out = parseFilters(
+      [{ field: 'name', value: 'xx', query: 'EQ' }],
+      { allowedFields },
+    );
+    expect(out[0].values).toBeUndefined();
+  });
+
+  it('parses IS_NULL with null value without values', () => {
+    const out = parseFilters(
+      [{ field: 'status', value: null, query: 'IS_NULL' }],
+      { allowedFields },
+    );
+    expect(out[0]).toMatchObject({ field: 'status', query: 'IS_NULL', op: 'IS NULL', value: null });
+    expect(out[0].values).toBeUndefined();
+  });
 });
 
 describe('toTree', () => {