Agent Skills: xts-generator

Generate OpenHarmony XTS (Compatibility Test Suite) test cases from API documentation. Use when generating or modifying XTS test files (.ets) for OpenHarmony API testing, including: (1) Creating new test files from API documentation, (2) Adding test cases for new methods, (3) Generating tests for enum types, (4) Creating optional parameter combination tests, (5) Writing exception/boundary test cases. This skill enforces strict type safety (no `any`/`unknown`), proper error handling (single error code assertions), and Hypium test framework conventions.