Adds a GitHub Actions workflow to automatically run CI checks for the skills CLI tool. Tests are run on both Ubuntu, Mac and Windows for the `stable` and `dev` Dart SDK channels. The workflow triggers on pushes and pull requests to the main branch that modify the `tool/` directory, and runs:
- `dart pub get`
- `dart analyze --fatal-infos`
- `dart format` (on the dev channel only)
- `dart test` - is currently omitted as the test suite needs to be refactored to work properly without relying on real API keys in the CI environment
https://github.com/flutter/flutter/issues/183124
Addresses several points of failure during the skill generation and validation lifecycle to prevent crashes and provide better error visibility. Additionally, it expands the capability of the `resources` field to accept local relative file paths in addition to URLs.
Key changes include:
- **Expanded Resource Support:** Updated `BaseSkillCommand` and `SkillParams` to allow the `resources` list to take both URLs and relative file paths, improving local testing and generation workflows.
- **Service Robustness:** Enhanced `GeminiService` and API interactions to gracefully handle errors, empty responses, and malformed JSON payloads.
- **Command Reliability:** Updated `GenerateSkillCommand` and `ValidateSkillCommand` to detect and gracefully log generic exceptions and empty content fetches instead of failing silently or crashing.
- **HTML/Markdown Parsing:** Broadened test coverage to cover conversions for tables, definition lists (dl/dt/dd), video sources, iframes, and details/summary HTML tags.
- **Comprehensive Testing:** Added unit tests across `generate_skills_test.dart`, `validate_skills_test.dart`, and `gemini_service_test.dart` to explicitly cover invalid API responses, missing metadata fallbacks, and retry logic.
- **Documentation:** Updated `README.md` to reflect the refined parameters, new resource path capabilities, and handling logic.
John Ryan