CRISPR made cutting the genome easy; the hard part was knowing what would happen next. Which guide will actually cut? And once the cell repairs the break, what sequence will you be left with — long dismissed as random? Machine learning answered both. Guide-activity models like DeepSpCas9 and DeepCpf1 predict which guides work from sequence alone. Then the surprise: inDelphi showed template-free repair is ‘predictable and capable of precise repair,’ hitting a single dominant genotype at 5–11% of sites; FORECasT confirmed outcomes ‘are not random, but depend on DNA sequence’ across a billion measured events. The idea generalized — BE-Hive predicts base-editing outcomes at R≈0.9, PRIDICT predicts prime-editing efficiency and even flags the pegRNAs worth trying. It’s the design half of the perturbation the virtual cell tries to predict the response to, and the design brain of the design→edit→measure loop a self-driving lab runs. The honest frontier is our native language: benchmarks are still thin, outcomes are cell-line-dependent, and a predicted genotype stays a hypothesis until sequencing agrees.