- Add CarrierInit enum (FromHost/BoolConst) for explicit initialization policy - LoopHeaderPhiBuilder generates Const instruction for BoolConst carriers - merge/mod.rs uses carrier_info to include ALL carriers in header PHI - Pattern 2/4 pass carrier_info to boundary builder - ConditionOnly carriers (is_digit_pos) now included in header PHI Remaining: latch incoming for ConditionOnly carriers (Phase 228-8) 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>