checkpoint

⚒️ Generated with [Fabro](https://fabro.sh)

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stages/002-expand_spec@1/prompt.md

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+Goal: Build a terminal-based FreeCell solitaire game in Python
+
+
+Goal: $goal
+
+Create a detailed implementation spec for the requested Python terminal card game.
+
+Cover:
+- Game rules and data structures (Card, Deck, Pile or equivalent state types)
+- Terminal rendering approach using the standard-library curses module
+- Input handling and move/action validation
+- Win/loss detection
+- UI layout
+- Test strategy
+
+Keep game rules testable without curses. Include a smoke mode so `python3 main.py --smoke` starts enough of the app to prove imports and setup without requiring an interactive terminal.
+
+Write the spec to .ai/card-game-spec.md.
+Write status.json at workspace root: outcome=succeeded if the spec is complete, outcome=failed with failure_reason otherwise.

stages/002-expand_spec@1/provider_used.json

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stages/002-expand_spec@1/response.md

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+I have successfully written a comprehensive, detailed implementation specification for building a terminal-based FreeCell Solitaire game in Python.
+
+The spec has been written to:
+- **Specification Document**: `.ai/card-game-spec.md`
+- **Execution Status**: `status.json` with `"outcome": "succeeded"`
+
+### Key Specification Highlights:
+1. **Core Domain Model & Game Logic**: Complete decoupling from the curses framework. Classes like `Card`, `Suit`, `Rank`, `Deck`, `Position`, and `GameState` manage state transitions, move constraints, and game rules natively and cleanly, making them fully testable in headless CI environments.
+2. **Move Validation & Rule Logic**: Enforces all FreeCell moves, empty pile behavior, card stacking (alternating colors and descending ranks), and includes the mathematical sequence-movement rule constraint formula: 
+   $$\text{Max Cards} = (1 + \text{Empty Free Cells}) \times 2^{\text{Empty Tableau Columns}}$$
+3. **Auto-Homing Mechanics**: An optional, safe automated helper that automatically moves cards to the foundations once they can no longer act as sequence-building stepping stones.
+4. **Interactive Curses UI/TUI**: A detailed layout conforming to $80 \times 24$ terminal dimensions using memory-efficient double-buffered updates via curses, rich color pair rendering for Red vs Black suits, and a versatile keyboard cursor-based layout navigation system.
+5. **Non-Interactive Smoke Mode**: Specifies the exact behavior of `python3 main.py --smoke` for fast automated integration checks without launching interactive screens.
+6. **Robust Testing Strategy**: Details unit tests covering edge cases for game rules, deterministic seed validation, and UI input mocking scenarios.