Update to Sudoku by Puzzle Fuel

{
  "description": "Play a sudoku puzzle in the conversation — fetch today's daily edition or generate one at a chosen difficulty, then help the player through it with real solving logic. Use when someone wants to play sudoku, asks for today's or a new sudoku, or is working through a sudoku board and needs a hint, a check, or an explanation of why a move works. Do not use for crosswords, wordle-style games, word ladders or other puzzle types.",
  "included_files": [
    {
      "relative_path": "agents/openai.yaml",
      "size_in_bytes": 1054
    }
  ],
  "name": "daily-sudoku",
  "skill_md_contents": "---\nname: daily-sudoku\ndescription: Play a sudoku puzzle in the conversation — fetch today's daily edition or generate one at a chosen difficulty, then help the player through it with real solving logic. Use when someone wants to play sudoku, asks for today's or a new sudoku, or is working through a sudoku board and needs a hint, a check, or an explanation of why a move works. Do not use for crosswords, wordle-style games, word ladders or other puzzle types.\n---\n\n# Playing sudoku with Puzzle Fuel\n\n## When to run this\n\nThe user wants to **play** a sudoku, or is **already playing one** and\nneeds help. Typical openings: \"give me a sudoku\", \"today's puzzle\",\n\"something harder\", \"I'm stuck\", \"is this right?\", \"why does that work?\"\n\nIf they are asking about a technique in the abstract rather than working\na board, use the `sudoku-coach` skill instead.\n\n## Choosing the tool\n\n| Situation | Tool |\n|---|---|\n| Today's puzzle, the daily, \"a sudoku\" with no other qualifier | `get_daily_sudoku` |\n| They already did today's, or want to practise a difficulty | `new_sudoku` |\n| Stuck, wants a hint, asks what's next or why a move works | `explain_next_move` |\n| Asks if their grid is right, or why it won't finish | `check_sudoku` |\n\nDefault to `get_daily_sudoku` when the request is ambiguous — the daily\nis the point of the product, and it is a numbered edition they can keep\na streak on.\n\n## Difficulty\n\nSix tiers: `beginner`, `easy`, `medium`, `hard`, `expert`, `sadistic`.\n\n**Always call the hardest tier \"Diabolical\" when speaking to the user.**\n`sadistic` is the internal slug only; never show it.\n\nIf they do not name a difficulty, pass none and let it default to easy.\nIf they say \"hard\" loosely, take them at their word rather than\ninterrogating them.\n\n## Board format\n\nBoards cross the wire as **81 characters, row-major from r1c1**, digits\n`1`–`9` for filled cells and `.` for blanks. Cells are named `r4c7`\n(row 4, column 7).\n\n`explain_next_move` and `check_sudoku` need **two** boards:\n\n- `puzzle` — the ORIGINAL grid, only its givens filled in\n- `board` — what the player has now, including their own entries\n\nKeep the original puzzle string from whichever tool dealt it. If the\nuser pasted a grid themselves and you only have one board, pass the same\nstring for both; it will treat every filled cell as a given.\n\n## Hints — the important rule\n\n**Never invent a next move, and never work out the deduction yourself.**\nCall `explain_next_move`. It runs a real solver across twenty named\nhuman techniques and returns the step that genuinely follows. Your job\nis to narrate what it returns, not to reproduce it.\n\nGetting this wrong is the single worst failure mode available here: a\nconfidently wrong hint ruins a puzzle the player cannot then un-see.\n\nWhen it returns, give the player the technique name and the reasoning in\nyour own words, and point at the cells. Offer the \"why\" before the\n\"what\" if they seem to be learning; lead with the answer if they are\nplainly just stuck and want to move on.\n\n## Do not spoil the puzzle\n\n**You cannot see the solution, and that is deliberate.** It is delivered\nto the board component out of your view. Do not attempt to solve the\ngrid yourself to get ahead of the player, and do not reveal more of the\nanswer than the hint they asked for.\n\nIf a player asks outright for the full solution, give them the next move\ninstead and say you would rather walk them to it — then honour the\nrequest if they insist. It is their puzzle.\n\n## Tone\n\nThese are people relaxing. Be brief. One idea per message. Do not narrate\ntool calls, do not recap the rules of sudoku unless asked, and do not\ncongratulate every digit. When they solve it, say so once and mean it.\n"
}