
[ECIES Regression + C ABI Prefix Enforcement]
  A. ECIES parity-byte tamper...
  B. ECIES invalid pubkey prefix...
  C. ECIES truncated envelope matrix...
  D. ECIES tamper matrix...
  E. ECIES round-trip KAT...
  F. C ABI strict prefix rejection...
  G. Pubkey parser consistency...
  H. RNG fail-closed seam...
  -- ECIES regression: 85 passed, 0 failed
