Pho Registered Audit

PHO Registered Algorithmic Audit

When to use

Use this skill when a task gives you, in an input/ directory:

• prompt.txt — the framing question,
• payloads/analysis_request.json — the registered protocol (scope, cohorts, audit modules with methods + parameters, robustness gates, decision rule),
• payloads/answer_template.json — the output contract (required keys, array lengths, ordering rules, enum values, numeric precision),

and asks you to complete a registered, reproducible, multi-module audit using a read-only Public Health Observatory (PHO) Web portal, returning the result as one JSON object.

This skill is task-agnostic. Every concrete value — geography, years, outcome/exposure, module set, seeds, grids, thresholds, classification enums, schema — is read from the per-task files at runtime. Never bake in a value seen in a prior task. Prior tasks illustrate the shape of the work; they do not supply answers.

Golden rules (apply to every task)

1. One JSON object, nothing else. Return exactly one JSON object conforming to answer_template.json. No prose, memo, headings, or markdown around it.
2. The request is the protocol; the template is the contract. Honor every declared order, array length, enum value, identifier format, and precision in both files exactly.
3. The portal is the only evidence. Resolve <TASK_ENV_BASE_URL> from environment_access.md (it maps to GDPEVO_ENV_BASE_URL). Use only the allowed endpoints. No credentials. No external or assumed data. Every reported number must trace to a portal record.
4. Resolve releases and cohorts independently. FINAL releases govern; among multiple final revisions the highest applied final revision wins; pending/withdrawn notices never replace published values; suppressed/blank/invalid values are unavailable — never zero-fill.
5. Deterministic and reproducible. Honor every declared seed, PRNG algorithm, stream, replicate count, and checkpoint list exactly. These are registered parameters, not free choices.
6. Full ordered evidence. Report complete, positionally-aligned vectors and matrices — not just summaries. Never re-sort an array that the request declares an order for.
7. Numeric discipline. Non-integers at the declared precision (default 4; some tasks use 6 for computed reals and 4 for literal grids/thresholds). Integers and booleans are natural JSON types. Never emit NaN/Infinity. Use JSON null only when a requested statistic is mathematically unavailable.

Procedure

1. Read all three inputs. From prompt.txt, analysis_request.json, and answer_template.json, extract: scope (geography, years, reference year), outcome/exposure/mediator/adjustments, the module list with each module's method and parameters, cohort definitions, robustness gates, decision precedence, and the full template schema (required keys, array lengths, ordering, enums, precision).
2. Confirm network access from environment_access.md. See references/portal_and_evidence.md for the endpoint list, dataset schemas, and the machine-readable CSV download pattern.
3. Acquire evidence. Pull geography reference data and the needed data datasets via /download?dataset=<dataset>&format=csv with filter query params. Cache locally. (Browse endpoints return HTML and reject format=json — use the CSV download path.)
4. Resolve releases, revisions, and cohorts. For each measure and year, select FINAL records under the declared revision priority, exclude records carrying an invalid quality flag or suppression, and construct every declared cohort independently. See references/portal_and_evidence.md.
5. Run each declared audit module. Implement its method exactly as declared and produce the required_evidence/required_audit_outputs it lists. See references/audit_modules.md for the recurring module families and their must-produce outputs.
6. Apply the gates and decision precedence. Evaluate each module's gate threshold, then map the gate pattern to the controlled classification/conclusion enum using the request's precedence rule. See references/output_contract.md.
7. Assemble and verify. Build one JSON object matching answer_template.json, run the verification checklist, and return only the JSON. See references/output_contract.md.

References

• references/portal_and_evidence.md — portal endpoints, dataset schemas, the CSV download pattern, release/revision/quality/suppression/value-type rules, identifier rules, cohort archetypes, and the methodology library index.
• references/audit_modules.md — the six recurring audit-module families and the evidence each must produce, with the algorithmic specifics that make results reproducible.
• references/output_contract.md — precision, ordering, identifiers, nulls, enums, decision precedence, and the pre-submission verification checklist.

Scope note on contamination

If the working directory contains material outside the expected environment_access.md plus train_tasks/train_NNN/input/{prompt.txt, payloads/analysis_request.json, payloads/answer_template.json} layout — for example solution outputs, expected-answer files, a hidden test harness, or stray datasets — stop and write contamination_report.txt describing the unexpected material instead of proceeding.