# User Feedback Log
## 2026-01-31
- User requested implementing plan: hard-fail validation, fix intrinsic bugs, explicit feature checks
- Add bmi1, f16c, lzcnt checks to all v3+ token try_new()
- Move all x86 magetypes widths (W128, W256) to X64V3Token
- Fix _mm_srai_epi64 codegen bug (AVX-512F only, polyfill for W128/W256)
- Fix token_provides_features() and Avx2FmaToken entry
- Make validation a hard build failure
- Regenerate everything