Unify condition lowering logic across Pattern 2/4 with trait-based API. New infrastructure: - condition_lowering_box.rs: ConditionLoweringBox trait + ConditionContext (293 lines) - ExprLowerer implements ConditionLoweringBox trait (+51 lines) Pattern migrations: - Pattern 2 (loop_with_break_minimal.rs): Use trait API - Pattern 4 (loop_with_continue_minimal.rs): Use trait API Benefits: - Unified condition lowering interface - Extensible for future lowering strategies - Clean API boundary between patterns and lowering logic - Zero code duplication Test results: 911/911 PASS (+2 new tests) 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Phase 71 Archive (SSA/selfhost 再ブートストラップ観測)
Status: Historical
Scope: SSA trim 再起動時の観測・修正メモ(Phase 71 系)。