Mutant Suite just got bigger.

Earlier versions of Mutant Suite focused on mutating a single prompt injection at a time. But today’s adversarial prompts rarely exist in isolation — they’re chained, layered, and designed to slip past defenses through multi-step reasoning.

To support this reality, Mutant Suite now lets you import and mutate prompt chains up to 12 steps long. You can bring in chains using either .txt or .json files, making it easy to load your existing test cases or share chains between tools.

Mutant Suite also now supports TXT export for mutated chains, with JSON export coming soon once the serialization layer is fully stabilized.

This update marks a major step toward treating prompt injections the way they actually appear in the wild: not as single mutations, but as evolving sequences.

You can check out the latest Mutant Suite release here —> https://github.com/celewoczko/mutant-suite/releases/tag/v2.0.0