ValiFit Constitutional Charter
Source Sovereignty
The principle
Every score, ranking, and number on ValiFit traces to a federal or authoritative open-data source we can cite by URL.
The commitment
ValiFit does not invent data. We do not estimate where the federal record exists. We do not interpolate where the cohort is too small for k-anonymity (k≥25). When a fact is shown to a user — a graduation rate, a flood zone, a per-pupil spending number — that fact is sourced to a federal agency (NCES, FBI, FEMA, HUD, HRSA, BLS, BEA, FHFA, EPA, USDA, FCC), an authoritative open-data publisher (Overture Maps, OpenStreetMap, Census Bureau), or a state regulator with statutory mandate. We document every source in lib/seo/source-citation.ts and the data_lineage database table; the same source citation is rendered to the user (visible) AND embedded in the page's Schema.org JSON-LD (machine-readable).
Why this matters
Real-estate decisions are six-figure financial decisions. Users acting on bad data lose money or buy into the wrong neighborhood. The industry standard — Zillow's "Zestimate", Redfin's "compete score" — is opaque interpolated modeling presented as authoritative. We refuse that pattern. If we don't have the source, we don't show the number.
How we enforce
lib/seo/source-citation.ts contains the FederalSourceKey enum — every fact in a blurb must cite one. data_lineage table records source, URL, refresh date, confidence per row. CI test verifies every score-emitting code path uses citation.
Aligns with
- FHA
- ECOA
- OMB Circular A-130
Last reviewed and affirmed: 2026-05-08. The charter is versioned with the codebase — a Git history of changes to lib/charters.ts serves as the audit log.