hedron-conformance
Language-neutral Hedron conformance-test kit and capability runner.
Ships versioned machine-readable fixtures, golden render/diagnostic artifacts, normalization rules, and a capability-level runner CLI so experimental Java/Node runtimes and optional native accelerators can prove parity with the Python reference — without matching incidental CPython formatting.
Also available as the flagship extra hedron[conformance].
Package maturity: Beta · Train: 0.25.x (last published 0.25.1; workspace 0.25.2 candidate) · pin >=0.25.0,<0.26
Install
pip install "hedron-conformance>=0.25.0,<0.26"
# or
uv add "hedron-conformance>=0.25.0,<0.26"
# via flagship:
pip install "hedron[conformance]>=0.25.0,<0.26"
Requires Python 3.11–3.14.
Runner
hedron-conformance run
hedron-conformance run --json
hedron-conformance list
hedron-conformance schema
hedron-conformance --version
# or
python -m hedron_conformance run
Failures report fixture id, contract version, and violated capability.
Python API
from hedron_conformance import load_bundled_fixtures, run_kit
fixtures = load_bundled_fixtures()
result = run_kit(fixtures)
assert result.ok
Related runtimes
Experimental evaluators in the monorepo (not published as PyPI apps):
hedron-runtime-node— Node ≥ 18hedron-runtime-java— JDK 11+
Links
License
MIT. See LICENSE.
1 maintainer
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