Sudoku

**Quick judgment**: This skill is a solid, focused Sudoku utility for fetching, storing, rendering, and gradually revealing puzzles. It is feature-complete for typical puzzle-generation workflows and integrates well with other tools via its JSON data format. Its main limitations stem from reliance on an external puzzle source and a CLI-style interface. **What it does well** - Offers a good range of puzzle sizes and difficulties, suitable from kids to advanced solvers. - Stores puzzles as JSON with a documented format (DATA_FORMAT.md), making them easy to reuse or process programmatically. - Produces clean PNGs, printable PDFs, and minimal HTML, and can reveal full or partial solutions. - Supports batch fetching with uniqueness guarantees and share-link generation for SudokuPad/SCL. **Key risks / drawbacks** - **External dependency**: All puzzles come from `sudokuonline.io`; service changes, downtime, or rate limits will degrade or break functionality. - **Network sensitivity**: Performance and reliability depend on network conditions; large batches may be slow or occasionally fail. - **Limited UX**: Interaction is primarily through CLI arguments (ids, types, flags); less friendly than a purpose-built UI and may need a wrapper layer in conversational settings. **Recommended scenarios** - Building a chat experience where users can request “a fresh Sudoku” and receive either an image/PDF or an HTML view, plus hints on demand. - Generating printable worksheets (school, tutoring, recreational puzzle sheets) with multiple unique puzzles. - Supporting step-by-step tutoring: the assistant can reveal single cells or boxes as hints and later show the full solution. - Using the JSON representation as input to further tools (e.g., solvers, analyzers, or custom renderers) inside the OpenClaw environment.