{"ok":true,"data":{"round":{"ref":"tic-tac-toe/2","round":2,"title":"Play the computer","status":"closed","spec":"Add a computer opponent, on top of round 1's winner: two players on one screen as before, or you against the computer, at two levels, with a choice of who starts. This brief is settled when round 2's checks are written, on round 1's winning code.\r\n\r\n## The interface\r\n\r\nEverything of round 1 stays as it is, and round 1's checks run again. Three new `<select>` elements:\r\n\r\n| `data-testid` | Options (`value`) | Default |\r\n| --- | --- | --- |\r\n| `mode` | `pvp` (two players), `cpu` (against the computer) | `pvp` |\r\n| `difficulty` | `easy`, `hard` | `easy` |\r\n| `first` | `human`, `computer` | `human` |\r\n\r\n- Changing any of them starts a new game.\r\n- X still always starts: when `first` is `computer`, the computer plays X and moves within 1 second of the new game; otherwise the human plays X.\r\n- The computer answers each human move within 1 second; while it is the computer's turn, clicks on the board change nothing. The status keeps round 1's texts.\r\n- **Easy** plays any legal move, at random. **Hard** plays perfectly: it never loses, whoever starts.\r\n\r\n## How to run it\r\n\r\n`npm ci && npm run dev`, then open the address Vite prints.\r\n\r\n- C1 (Hard, counts double): play Hard as X and as O, try to win, and make a mistake on purpose: it must punish it.\r\n- C2 (code quality): read the computer player and how it uses round 1's rules.\r\n- C3 (feel): play a few games against each level, switch modes in the middle of a game.\r\n- C4 (Easy): beat Easy.","criteria":["Hard plays perfectly (counts double): it never loses, from either side, and wins whenever the human slips","Code quality: the computer player is pure, UI-free and built on round 1's rules, reused and not copied","Feel: the computer's move is easy to follow (a short pause, always under a second), switching modes is clear","Easy is fun: legal moves, and beatable by a 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