promptfoo-strategies-custom-regressionlisted

# Custom, Composition, and Regression Strategies Four strategies for advanced use cases: `custom` (text-based multi-turn instructions, no coding), `custom` scripts (JavaScript transformations), `layer` (compose multiple strategies sequentially), and `retry` (regression testing from historical failures). These let you create user-defined approaches, chain strategies into sophisticated attack chains, and learn from past failures. ## Use this skill when - Creating a custom multi-turn strategy from natural language instructions (no coding) - Writing custom JavaScript strategy transforms for programmatic control - Composing multiple strategies sequentially (`layer`) — e.g. jailbreak → base64, agentic → multimodal - Building a regression test suite that learns from past failures (`retry`) - Chaining agentic + multimodal strategies (e.g. hydra → audio, crescendo → image) - Automating manual red team discoveries into reusable strategies - Creating named strategy variants for different attack personas ## Do not use this skill when - You need standard static encoding strategies → use `promptfoo-strategies-static` - You need standard dynamic/iterative strategies → use `promptfoo-strategies-dynamic` - You need standard multi-turn strategies → use `promptfoo-strategies-multi-turn` - You need indirect prompt injection via web pages → use `promptfoo-strategies-indirect-injection` ## 🛡️ Edge cases (mandatory handling) - **Layer ordering rules** — agentic strategies (hydra, crescendo, go