Atheris Fuzz Driver Generator
SkillDev toolsCreates 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).
Available today. Use it from your connected AI after setup.
No other account needed.
Connect ahel once, and every AI you use reads what you have installed.
Then ask your AI: use the Atheris Fuzz Driver Generator skill
What this skill tells your AI
The instructions your AI receives, as published by openlair/openskill in tasks-evolved/setup-fuzzing-py/environment/skills/evo-atheris-fuzz-driver/SKILL.md and read by ahel’s review.
Generates fuzz.py harness files for Python libraries with proper Atheris instrumentation, FuzzedDataProvider usage, and exception handling.
Driver Design Principles
- Import target library inside
atheris.instrument_imports()context manager - Use
FuzzedDataProviderto generate structured typed inputs - Catch only expected exceptions (ValueError, TypeError, domain-specific errors)
- Guard with
if __name__ == "__main__":block - Use
atheris.Setup(sys.argv, TestOneInput)thenatheris.Fuzz()
Supported Libraries
- arrow: Date/time parsing, timestamp boundary testing
- black: Code formatting with Mode configuration
- ipython: Input transformation pipeline
- minisgl: JSON/msgpack parsing (lightweight targets)
- ujson: Differential fuzzing against stdlib json
Key Functions
generate_fuzz_driver(lib_path)- Generate and write fuzz.py for a libraryget_driver_template(lib_name)- Get driver source code for a libraryget_exception_handlers_for_lib(lib_name)- Get expected exceptions listcreate_fuzz_driver_file(lib_path, lib_name)- Write fuzz.py to disk
Usage
import sys
sys.path.insert(0, '/app/environment/skills/evo-atheris-fuzz-driver/scripts')
from fuzz_driver import generate_fuzz_driver, create_fuzz_driver_file
generate_fuzz_driver('/app/arrow')
generate_fuzz_driver('/app/black')
Signals
- GitHub stars
- 89
- Forks
- 4
- Last commit
- Sep 2026
Advanced
- Catalog kind
- skill
- Gateway key
evo-atheris-fuzz-driver- Source
- github.com/openlair/openskill