Tools & experiments

Workshop

Tools I build because I wanted them to exist. Smaller than the client work and not on anyone’s roadmap but mine — which is the point: they are where I get to make every decision and live with it.

Built for myself · not client work2 projects
Markdown Reader in edit mode — markdown source on the left, live rendered preview with a table on the right
v1.0macOS · 2026

Markdown Reader

A Rust and Tauri 2 reader built around the system WebView, so Mermaid diagrams, GFM tables and syntax highlighting render faithfully without opening an editor.

RustTauri 2CodeMirror 6markdown-it
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Sentinel — four views: privacy permissions by category, the persistence scan grouped by risk, reclaimable caches, and the system dashboard
v1.0macOS · 2026

Sentinel

One app for both halves of Mac hygiene: reclaim disk space and uninstall properly, then see what starts itself at login and what is talking to the internet.

Swift 6SwiftUImacOSCode signing
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The client work is the other half.

These are the things I build for myself. The systems I build for other people — signature infrastructure, real-time platforms at scale — are on the main page.

Selected workinfo@shehan.dev