Closes #70

Minesweeper Implementation Complete!
I've successfully created a comprehensive Minesweeper example for the Cougr framework with proof-friendly, deterministic cell reveal mechanics!
📦 Deliverables Summary
Location: examples/minesweeper/
Files Created:
✅ Cargo.toml - Project configuration
✅ src/lib.rs - Contract implementation (573 lines)
✅ src/tests.rs - Test suite (430 lines, 21 tests)
✅ README.md - Comprehensive documentation (347 lines)
✅ .github/workflows/minesweeper.yml - CI/CD pipeline
🎮 Game Features Implemented
✅ Core Mechanics:
9×9 grid (81 cells total, compact for on-chain)
10 mines (~12% density - beginner friendly)
Deterministic mine placement (proof-friendly!)
Cell reveal with adjacent mine count (0-8)
✅ Reveal System:
Safe cell revelation with adjacency feedback
Mine detection and game-over trigger
Already-revealed cell validation
Out-of-bounds protection
✅ Win/Loss Conditions:
Loss: Immediate game over on mine reveal
Win: All safe cells revealed (71 cells)
Game state tracking (revealed count, remaining cells)
✅ Proof-Friendly Design:
Fixed mine positions (verifiable layout)
No randomness required
Deterministic adjacency calculation
Reproducible game states
🏗️ ECS Architecture (Cougr-Style)
Components:
BoardComponent - Visible cell states (hidden/revealed/mine)
MineLayoutComponent - Hidden mine positions with adjacency counting
GameStateComponent - Status, revealed count
Systems:
RevealSystem - Cell revelation logic
AdjacencySystem - 8-neighbor mine counting
LossSystem - Mine detection → game over
CompletionSystem - Win condition check
🧪 Test Coverage (21 Tests - All Passing)
Test Categories:
✅ Initialization (2 tests)
✅ Safe cell reveal (3 tests)
✅ Mine reveal & loss (2 tests)
✅ Repeated reveals (2 tests)
✅ Out of bounds (1 test)
✅ Win condition (2 tests)
✅ Visible cell state (4 tests)
✅ Reset game (1 test)
✅ Adjacent count verification (1 test)
✅ Edge cases (3 tests)
✅ Validation Results
bash

All checks passed:

cargo fmt --check ✓
cargo clippy --all-targets --all-features -- -D warnings ✓
cargo test ✓ (21 passed)
cargo build --release ✓
📚 Contract API
rust
// Initialize game with deterministic mines
pub fn init_game(env: Env) -> GameState

// Reveal cell at position
pub fn reveal_cell(env: Env, row: u32, col: u32) -> RevealResult

// Get current game state
pub fn get_state(env: Env) -> GameState

// Get visible state of specific cell
pub fn get_visible_cell(env: Env, row: u32, col: u32) -> VisibleCellState

// Check if game is finished
pub fn is_finished(env: Env) -> bool

// Get full board (for debugging)
pub fn get_board(env: Env) -> Vec

// Reset game
pub fn reset_game(env: Env) -> GameState
🎯 Key Design Highlights
Deterministic Mine Layout: Fixed positions enable verification and auditing
Compact State: 9×9 grid optimized for on-chain storage efficiency
Clean Separation: Board (visible) vs MineLayout (hidden) components
Adjacent Counting: Efficient 8-neighbor checking with bounds validation
Comprehensive Testing: Covers all reveal scenarios, win/loss conditions
Production Ready: Passes all Clippy lints, formatted correctly
The Minesweeper example demonstrates grid-based reveal mechanics, state transitions driven by hidden content, and terminal conditions in a deterministic puzzle structure - perfect for on-chain gaming!