"""
Unit tests for Ralph (Groundhog) implementation.

This package contains comprehensive tests for all Ralph components:
- RalphConfig: Configuration dataclass
- RalphState: State model for loop iterations
- StateManager: Persistent state file management
- BackpressureGate: Build/test/lint validation
- ToolKits: PlanUpdater, LearningsUpdater, Backpressure, Filesystem, SubagentSpawner
- Phases: Requirements, Todo, Incremental
- Result models: IterationRecord, RalphLoopResult
- RalphLoop: Main orchestrator
"""
