Prompt Case Definition With Embedded Evaluation Logic

Prompt optimization library with systematic variation testing.

Unique: Implements prompt cases as composable objects that bind prompts directly to their evaluation criteria via callable functions, rather than separating prompt definitions from evaluation logic as external test assertions. Includes lifecycle hooks for response transformation before scoring, enabling preprocessing pipelines within the case definition.

vs others: More tightly integrated than external test frameworks (pytest, unittest) because evaluation logic lives with the prompt definition, reducing context switching and making prompt-evaluation pairs self-documenting.