01 · Client-side Verification Wrapper

Theme 01 · Client-side wrapper · data: synthetic · reimagines MET core + METcalcpy

The founding experiment: can MET’s documented verification methods run entirely client-side? It renders a live 2×2 contingency table, the full categorical suite (POD, FAR, POFD, SR, CSI, GSS/ETS, HSS, PSS/HK, FBIAS, ORSS) and continuous stats (ME, MAE, MSE, RMSE, BCRMSE, r) over synthetic matched pairs, with a per-stat MET-fidelity formula table, a SQL-like query panel, and drag-drop CSV ingestion.

Structure

apps/client-side-wrapper/
  index.html          entry
  js/main.js          UI wiring
  js/stats.js         thin adapters over lib/met-stats.mjs
  js/contingency.js   2×2 cell derivation
  js/query.js         compiled query panel
  js/fidelity.js      per-stat formula/fidelity table
  js/diagrams/        performance + reliability diagrams
  data/               synthetic matched pairs (CSV + embedded module)

Status & notes

• 29/29 formula self-checks; migrated to the shared lib with 2,574 bit-for-bit old-vs-new checks (0 mismatches).
• Real-data wiring is last in the blueprint’s sequencing: it is the only app that needs per-pair values, and reconstructing pairs from SL1L2 partial sums is underdetermined — the plan is to synthesize pairs behind an explicit parity test (blueprint §6 Q1).
• Single-file build: dist/client-side-wrapper.html (~500 KB).