FEAT: Adding Garak package hallucination scenario#2141
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Port garak's packagehallucination probe into PyRIT as a scenario plus a deterministic scorer, following the web_injection precedent. - Add PackageHallucinationScorer under score/true_false/regex/ (extract-then- allow-list; documented why it does not subclass RegexScorer). - Add PackageHallucination scenario covering Python/JavaScript/Ruby/Rust. - Move the prompt/task corpus into local .prompt datasets under seed_datasets/local/garak/ instead of hardcoding it in scenario code. - Document the scorer in doc/code/scoring/1_true_false_scorers and the scenario in doc/scanner/garak. Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
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Description
Ports garak's
packagehallucinationprobe into PyRIT as a scenario plus a deterministic scorer, following theweb_injectionprecedent.PackageHallucinationScorer(underpyrit/score/true_false/regex/): extracts imported package names from model-generated code and flags any that are absent from an injected known-good reference set (Python stdlib added automatically). It lives beside theRegexScorerfamily but deliberately does not subclass it — its contract is extract-then-allow-list, the inverse ofRegexScorer's match-means-hit — and the docstring explains why.PackageHallucinationscenario covering Python, JavaScript, Ruby, and Rust..promptdatasets underseed_datasets/local/garak/(auto-discovered) rather than being hardcoded in scenario code, keeping dataset ownership out of the scenario.Tests and Documentation
tests/unit/score/test_package_hallucination_scorer.pyandtests/unit/scenario/garak/test_package_hallucination.py.PackageHallucinationScorerexample todoc/code/scoring/1_true_false_scorersand the scenario todoc/scanner/garak.doc/code/scoring/1_true_false_scorers.pyto regenerate the notebook.