Individual skill

pho-algorithmic-audit

Solve Public Health Observatory (PHO) "registered algorithmic audit" analysis tasks — the ones that hand you a prompt.txt plus payloads/analysis_request.json and payloads/answer_template.json and point you at a read-only web data portal (a "<TASK_ENV_BASE_URL>" placeholder; a Public Health Observatory / Observatory data portal with /catalog, /methodology, state_health, county_health, country_indicators, socioeconomic, and revisions datasets). Use it whenever the request asks for a publication/cohort audit followed by a fixed roster of ~6 statistical "modules" (fixed-effects or GMM jackknife, nested ridge/elastic-net cross-validation, wild cluster bootstrap-t, grouped split conformal, trajectory PCA + k-means stability, source/year perturbation or Shapley, mediation, sensitivity surfaces) and a gated PASS/FAIL decision or classification, returned as one strict JSON object conforming to the answer template.

experiments/claude_code_opus_4_8_xhigh/reports/skills/task_group_023/reflect-3/reflect-3_attempt_01/SKILL.md

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Oct 29, 2026
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Apache-2.0

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# PHO algorithmic-audit solver

These tasks look intimidating but are highly templated. A prompt sets a business question;
`analysis_request.json` registers a cohort/publication spec plus ~6 audit **modules** and a
**decision rule**; `answer_template.json` fixes the exact response contract. Your job is to
pull evidence from the read-only portal, reconstruct each registered design exactly, and
emit one JSON object. There is **no oracle to call while solving** — you compute everything
from the portal and the request.

## What you're given (the three inputs)

- **`prompt.txt`** — the business framing and the portal base URL placeholder. Narrative
  only; the real spec is in the JSON payloads.
- **`payloads/analysis_request.json`** — the authoritative spec: geography scope, years,
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