IFBench verifier code attribution
=================================

This package vendors and adapts the programmatic verifier semantics from:

  Generalizing Verifiable Instruction Following / IFBench
  https://github.com/allenai/IFBench
  Source revision inspected for vendoring: 1091c4c3de6c1f6ed12c012ed68f11ea450b0117

The upstream IFBench codebase is licensed under Apache License 2.0.
The upstream repository states:

  "This codebase is licensed under Apache 2.0 as given in [LICENSE](./LICENSE)."

The frozen itemset is derived from the Hugging Face dataset:

  allenai/IFBench_test
  Dataset revision: 2e8a48de45ff3bf41242f927254ca81b59ca3ae2

The upstream dataset card states:

  "This dataset is licensed under ODC-BY-1.0. It is intended for research and
  educational use in accordance with Ai2's Responsible Use Guidelines. This
  dataset includes output data generated from third party models that are
  subject to separate terms governing their use."

This local package keeps the public scoring interface aligned with
localbench.scorers.ifeval while avoiding a runtime dependency on the IFBench
reference package and its optional verifier dependencies.

The words:start_verb constraint is excluded to keep the scorer deterministic and
dependency-free.
