Individual skill

evo-atheris-fuzz-driver

Creates Atheris-based coverage-guided fuzz drivers for Python libraries using FuzzedDataProvider for structured input generation. Includes templates and patterns for different library types (parsers, formatters, serializers, ML frameworks).

tasks-evolved/setup-fuzzing-py/environment/skills/evo-atheris-fuzz-driver/SKILL.md

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Repository stars (not skill ratings): 97
Repository last updated: Sep 10, 2026
License: Apache-2.0

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# Atheris Fuzz Driver Generator

Generates fuzz.py harness files for Python libraries with proper Atheris instrumentation, FuzzedDataProvider usage, and exception handling.

## Driver Design Principles

1. Import target library inside `atheris.instrument_imports()` context manager
2. Use `FuzzedDataProvider` to generate structured typed inputs
3. Catch only expected exceptions (ValueError, TypeError, domain-specific errors)
4. Guard with `if __name__ == "__main__":` block
5. Use `atheris.Setup(sys.argv, TestOneInput)` then `atheris.Fuzz()`

## Supported Libraries