fix: 增加insert 语句 - 的支持

src/function/update_variables.ts

@@ -228,6 +228,7 @@ function extractJsonPatch(patch: any): Command[] {
                 const pathParts = _.toPath(path);
                 const lastPart = pathParts[pathParts.length - 1];
                 const containerPath = pathParts.slice(0, -1).join('.');
+                // 保留 JSON Patch 的 "-" 特殊 token，交给执行阶段结合目标集合类型解释。
                 const keyOrIndexArg = /^\d+$/.test(lastPart) ? lastPart : `'${lastPart}'`;
                 translated_commands.push({
                     type: 'insert',
@@ -978,16 +979,23 @@ export async function updateVariables(
                             ? targetSchema.template
                             : undefined;
 
-                    if (Array.isArray(collection) && typeof keyOrIndex === 'number') {
+                    if (
+                        Array.isArray(collection) &&
+                        (typeof keyOrIndex === 'number' || keyOrIndex === '-')
+                    ) {
                         // 目标是数组且索引是数字，插入到指定位置
+                        // JSON Patch 中的 "-" 表示追加到数组末尾，而不是字面量键名。
+                        const insertIndex = keyOrIndex === '-' ? collection.length : keyOrIndex;
+                        const positionLabel =
+                            keyOrIndex === '-' || keyOrIndex === -1 ? 'tail' : keyOrIndex;
                         valueToAssign = applyTemplate(
                             valueToAssign,
                             template,
                             strict_template,
                             concat_template_array
                         );
-                        collection.splice(keyOrIndex, 0, valueToAssign);
-                        display_str = `ASSIGNED ${JSON.stringify(valueToAssign)} into '${path}' at index ${keyOrIndex} ${reason_str}`;
+                        collection.splice(insertIndex, 0, valueToAssign);
+                        display_str = `ASSIGNED ${JSON.stringify(valueToAssign)} into '${path}' at index ${positionLabel} ${reason_str}`;
                         successful = true;
                     } else if (_.isObject(collection)) {
                         // 目标是对象，设置指定键

tests/json_patch.test.ts

@@ -63,7 +63,6 @@ describe('JSON Patch fixtures', () => {
         const statData = _.cloneDeep(testCase.doc);
         const schema = generateSchema(_.cloneDeep(testCase.doc));
         relaxSchema(schema);
-        if (_label.includes('16')) return; //对于 A16. 场景，不支持符号 - 的特殊含义
 
         const variables: MvuData = {
             stat_data: statData,
@@ -133,4 +132,32 @@ describe('执行测试', () => {
 
         expect(variables.stat_data).toEqual({ 测试: 20 });
     });
+
+    test('json patch insert with /- appends to array tail', async () => {
+        const statData = {
+            主角: {
+                持有物品: [{ name: '木钥匙' }, { name: '银钥匙' }],
+            },
+        };
+        const schema = generateSchema(_.cloneDeep(statData));
+        relaxSchema(schema);
+
+        const variables: MvuData = {
+            stat_data: statData,
+            display_data: {},
+            delta_data: {},
+            schema: schema as any,
+        };
+
+        const message =
+            '<JsonPatch>[{"op":"insert","path":"/主角/持有物品/-","value":{"name":"铜钥匙","description":"古铜色小钥匙"}}]</JsonPatch>';
+
+        await updateVariables(message, variables);
+
+        expect(variables.stat_data.主角.持有物品).toEqual([
+            { name: '木钥匙' },
+            { name: '银钥匙' },
+            { name: '铜钥匙', description: '古铜色小钥匙' },
+        ]);
+    });
 });