A3 — synthetic data generator - #4
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Implements platform-ai#571. Adds a fully deterministic, seed-driven generator that produces all three fixture packs (Operations, Outcomes, Equity & Research) with the intentional signals required by downstream B/C tasks: MoM attendance trend (+5 pp/month across Q1), low-N AIAN subgroup suppression (n=4 < threshold 10), IEP attendance disparity (~11 pp gap), and satisfaction dip-and-recovery in October. Files added: - benchmark/datagen/spec.py — source-of-truth constants + signal docs - benchmark/datagen/messiness.py — deterministic RNG helpers (no global RNG) - benchmark/datagen/generator.py — three pack generators + CLI entry point - tests/unit/test_generator.py — 41 tests: determinism, schema, signals
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Pre-commit pinned ruff v0.4.10 while CI installed ruff>=0.4 (0.15.15), and the two disagreed on formatting test_generator.py — CI's format check failed though pre-commit passed locally. Pin ruff==0.15.15 in dev deps and bump the pre-commit ruff hook to v0.15.15 so local and CI use the same formatter. Reformat the one affected file.
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Summary
python -m benchmark.datagen.generator --seed 42 --out <dir>) that produces all three fixture packs: Operations, Outcomes, and Equity & Research.benchmark/schemas/fixture_schema.md.spec.pyfor exact values):suppressed=true,attendance_rate=null).Files added
benchmark/datagen/spec.pybenchmark/datagen/messiness.pybenchmark/datagen/generator.py--seed,--out,--pack)tests/unit/test_generator.pyTest plan
ruff check .— no issuesruff format --check .— no reformats neededmypy benchmark runner— no issuespytest— 81 passed (41 new generator tests + 40 pre-existing)pre-commit run --all-files— all hooks passpython -m benchmark.datagen.generator --seed 42 --out <dir>writes all three pack directories🤖 Generated with Claude Code