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test-case-reducer

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Automatically reduces bug-triggering test cases to minimal form while preserving the failure. Use when debugging with large, complex test cases that need simplification, reproducing bugs with minimal examples, or creating regression tests from verbose failure scenarios. Takes a failing test and systematically removes unnecessary inputs, steps, assertions, and code using delta debugging and other reduction algorithms. Supports unit tests, integration tests, input files, and multiple programming languages (Python, JavaScript, Java, C/C++).

skills/test-case-reducer/SKILL.md

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Aug 21, 2026
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Apache-2.0

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# Test Case Reducer

Automatically reduce bug-triggering test cases to minimal form while guaranteeing the reduced test still reproduces the same failure.

## Core Concept

Test case reduction works by:
1. **Identify**: Parse the test case and identify reducible elements
2. **Remove**: Systematically try removing elements (lines, statements, inputs)
3. **Validate**: Run the test after each removal to verify failure is preserved
4. **Iterate**: Continue until no further reduction is possible

## Workflow
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