feat(phase276-p0): Quick Win improvements - type helper SSOT + debug cleanup
Phase 276 P0 post-Phase 275 robustness improvements:
1. Debug cleanup (wiring.py L100-103):
- Remove traceback.format_stack() output
- Cleaner debug logs after Phase 275 completion
2. box_from_f64 usage investigation:
- Confirmed ZERO usage (Rust/Python/MIR)
- Ready for deletion (Phase 275 unboxed double SSOT)
- crates/nyash_kernel/src/lib.rs L244-252, L971-982
3. Type resolution SSOT (⭐ most important):
- New file: src/llvm_py/phi_wiring/type_helper.py (72 lines)
- Unified 3 duplicate logic sites:
* tagging.py: inst.get("dst_type") → type_helper.get_phi_dst_type()
* llvm_builder.py: 9 lines → 2 lines (-7)
* wiring.py: 18 lines → 5 lines (-13)
- Priority: MIR JSON dst_type > resolver.value_types
- Benefits: SSOT principle, bug prevention, easy extension
4. Type mismatch warning enhancement (wiring.py L63-79):
- CRITICAL warning for predeclared PHI type mismatch
- PhiManager.invalidate_phi() notification
- Early bug detection with ⚠️ marker
Effects:
- Type resolution logic: 3 sites → 1 SSOT (type_helper.py)
- Code reduction: -20 lines duplicate logic
- Robustness: SSOT principle, CRITICAL warnings, Fail-Fast
- Debuggability: cleaner logs, prominent type mismatch alerts
Testing:
- LLVM harness: exit=3 verified (/tmp/test_p275_debug2.hako)
- NYASH_PHI_TYPE_DEBUG=1: correct type resolution confirmed
Docs:
- Phase 276 P0 completion: docs/.../phase-276/P0-COMPLETION.md
- 10-Now.md: Phase 276 P0 ✅, Phase 275 P0 completed section
Next steps (Phase 277 P0 recommended):
- Delete box_from_f64 (nyash.box.from_f64, nyash.float.box_from_f64)
- Adopt dst_type_to_llvm_type() helper
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
tomoaki
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