aho-corasick 1.1.4 implements multi-pattern string search via Aho-Corasick automata and SIMD Teddy prefilters. 227 unsafe occurrences are concentrated in Teddy SIMD pointer loops and DFA transition-table indexing; each is documented with # Safety comments, guarded by construction invariants, and covered by a libfuzzer target. No I/O, no build execution, no findings.