W-632026-09
Audits 500 synthetic video tracking links, dry-runs a bulk rollout with backups, matches four payment rails to leads by email, and credits delayed sales to the originating video. 33 in-browser assertions.
Vanilla JSSVG
W-642026-09
Tracking QA for a multi-client agency: nine checks run in the page across five synthetic clients, with a continuity trace and a client-facing report.
Single-file HTMLno build
W-542026-08
Decodes Magento option IDs, repairs Cyrillic SKUs, normalises units to SI, classifies to ETIM/eCl@ss, generates FR/EN copy, then blocks any row failing six invariants.
Vanilla JSZero-dependency pipeline
W-562026-08
37k-follower Instagram export classified into six lead categories: extraction, confidence flags, in-page selftest.
Static HTMLVanilla JS
W-602026-08
Rules as checkable constraints plus a gate that fails the draft breaking one: 18 drafts, 8 rules, 6 unconstrained drafts caught, 32 assertions.
Vanilla JSVercel Functions
W-612026-08
Five custom Microsoft Presidio classifications benchmarked on a synthetic enterprise corpus: before and after precision, recall, throughput and worker scaling, with a 27-assertion selftest that recomputes in the browser.
Microsoft PresidioPythonspaCyPlaywright
W-362026-07
A live teaching workbench for founders: answer 4 questions to get a database recommendation, watch normalization decompose a real table, and race a summary table against a raw scan. Every answer framed for AI-assisted building.
HTMLJavaScriptclient-side compute
W-372026-07
168 dyadic time-series analyses: 16-lag CCF, mixed-effects inference, APA reporting; recompute all 2,688 coefficients in your browser.
PythonstatsmodelsJupytervanilla JS
W-392026-07
Twice-weekly financial pipeline audit, replicated live in the browser: landing, freshness, row-integrity, schema-drift and sanity checks on synthetic Fed-style series, chained audit log, 28-check selftest.
Vanilla JSVercel
W-452026-07
Reproduces the mixed-depth hierarchy rollup bug (understate vs double-count) and proves the closure fix, with 12 invariants recomputed live.
Next.jsTypeScript
W-462026-07
USD to EGP remittance slice on real Postgres: double-entry ledger, idempotent transfers, sanctions screening and an append-only audit trail, live in the page.
Next.jsPostgres (Neon)double-entry ledger
W-472026-07
German phpBB threads to RAG-ready English Markdown: shielded translation, per-token fidelity gate, chunk-survival simulator, VLM triage.
Next.jssharp
W-482026-07
QuickBooks Online line-item job costing: the multi-project bill bug reproduced live, 4 business rules toggleable, a real formatted .xlsx generated on demand, 13-check selftest endpoint.
Next.jsexceljs
W-492026-07
Two firms find their shared clients without either seeing the other's list: CLK Bloom-filter encoding, Dice fuzzy matching, live threshold calibration, and a hardening curve priced in recall.
Next.js 16TypeScriptWebCrypto (HMAC-SHA256)
W-502026-07
License-screens 8 real text sources with quoted clauses, recomputes a shingle-dedup run in the browser, and exports a cleared-rows-only provenance CSV.
HTMLJSPlaywrightVercel
W-522026-07
Streaming tick feed to 2-minute OHLCV bars, live indicators, rule evaluation and at-least-once webhook delivery, with fault injection and an acceptance selftest that recomputes every claim per request.
Next.js 16TypeScriptServer-Sent Events
W-532026-07
168 dyadic time-series analyses: a 16-point lag sweep per trial, peak-lag extraction, and a random-intercept mixed model, all recomputed in the browser and asserted against scipy and statsmodels.
Next.jsTypeScriptPythonnumpyscipystatsmodels
W-162026-06
Pre-meeting producer-intelligence briefings assembled from five messy data sources. Synthetic data, no real PII, stated on the page.
Next.js
W-212026-06
Messy operator data in, a clean warehouse fact table out: 6 locations, 2 regions, on-demand pipeline runs with BI on top.
Next.js
W-272026-06
Real Plaid sandbox flow (link token, Link, exchange, accounts) with a visible client/server secret boundary and an honest security checklist.
Next.jsPlaid SDK
W-292026-06
German-language analytics cockpit: GA4 dataLayer events, Consent Mode v2, server-side measurement and a dashboard layer, all clickable.
Next.jsGA4Consent Mode v2
W-302026-06
Decodes Indian-market EV VINs across 16 manufacturers with a cited source under every field, a segment visualizer and a 22-assertion selftest.
TypeScript engineNext.js