A production-quality TypeScript CLI that audits public-transit GTFS feeds for wheelchair-accessibility coverage, data quality, and actionable route-level gaps.

A CI-oriented tool that compares accessibility scans between two builds and blocks only newly introduced, evidence-backed regressions.

An explainable anomaly-detection workbench for small time-series datasets with reproducible experiments and a browser-based report.

A database learning tool that turns query plans into interactive trees and explains common scan, join, sort, and index decisions.

A calm offline habit experiment app that helps a user test routines without accounts, streak pressure, notifications, or remote analytics.