Small enough to audit. Structured to expand.

The collection pins source-backed numeric estimates where a reviewed table, API, or official release exists, and keeps unknowns visible when no defensible public number is available.

Snapshot policy

Runtime pages use versioned local records rather than live external APIs. Every record carries source IDs, review dates, method, evidence status, limitations, and license metadata. A dated snapshot remains a valid historical artifact even if its source later publishes a new release.

Machine-readable files

Source code, typed records, validation schemas, the numeric-estimate snapshot, and the complete source license manifest live in the project repository. Public provenance for those files is listed in the source registry.

The calculator dataset is published as iq-to-percentile.csv (integer scores 40–160) and iq-to-percentile.json. Those files are theoretical normal-model conversions, not official test percentiles.