Portfolio

Selected engineering proof: what I built, the systems underneath, and the tradeoffs that mattered. Raintree product pages live at raintree.technology.

Agent Safety & Evals

Context & Developer Tools

Data & Intelligence Systems

Product SaaS

Systems & Low-Level

Music & Creative Systems

Interface audit / personal case study

HIG Doctor

Apple HIG retrieval and audits

What I built

Apple HIG corpus and audit tools for agents reviewing UI.

Stack

14 Agent Skills / Bun CLI / MCP SDK / Next.js site / GitHub Action / Remotion

Runtime

MCP exposes `hig_list_skills`, `hig_lookup`, and `hig_audit` over stdio.
Audit CLI scans code, style, and config files, then emits markdown, JSON, and CI pass/fail gates.
GitHub Action wraps the same scanner so repositories can fail on critical HIG violations.

Data model

14 skills and 156 reference topics organize HIG foundations, platforms, patterns, inputs, technologies, and components.
Audit rules carry framework hints, categories, severity buckets, positive detections, and report metadata.
Website serves `/llms.txt`, `/raw/<slug>`, topic pages, and synced audit patterns for agent retrieval.

Techniques

348 patterns cover accessibility, semantic color, Dynamic Type, focus, dark mode, motion, i18n, layout, controls, dialogs, status, and search.
Framework detectors span SwiftUI, UIKit, React, Vue, Svelte, Angular, Compose, Android XML, React Native, Flutter, CSS, and HTML.
Context-aware suppressions avoid false positives for print CSS, reduced-motion blocks, progressive focus-visible patterns, and pseudo-elements.
Legal-hardening scripts strip Apple CDN images and preserve attribution while keeping topic structure useful for agents.

Verification

Detection rules cover common UI frameworks rather than assuming a single Apple-native stack.
Context-aware suppressions reduce false positives for intentional layout, platform, or route exceptions.
Severity thresholds separate blocking issues from design-review guidance.
Corpus refresh path keeps agent references aligned with guideline changes.

Portfolio

Selected engineering proof: what I built, the systems underneath, and the tradeoffs that mattered. Raintree product pages live at raintree.technology.

Agent Safety & Evals

Context & Developer Tools

Data & Intelligence Systems

Product SaaS

Systems & Low-Level

Music & Creative Systems

Interface audit / personal case study

HIG Doctor

Apple HIG retrieval and audits

What I built

Apple HIG corpus and audit tools for agents reviewing UI.

Stack

14 Agent Skills / Bun CLI / MCP SDK / Next.js site / GitHub Action / Remotion

Runtime

MCP exposes `hig_list_skills`, `hig_lookup`, and `hig_audit` over stdio.
Audit CLI scans code, style, and config files, then emits markdown, JSON, and CI pass/fail gates.
GitHub Action wraps the same scanner so repositories can fail on critical HIG violations.

Data model

14 skills and 156 reference topics organize HIG foundations, platforms, patterns, inputs, technologies, and components.
Audit rules carry framework hints, categories, severity buckets, positive detections, and report metadata.
Website serves `/llms.txt`, `/raw/<slug>`, topic pages, and synced audit patterns for agent retrieval.

Techniques

348 patterns cover accessibility, semantic color, Dynamic Type, focus, dark mode, motion, i18n, layout, controls, dialogs, status, and search.
Framework detectors span SwiftUI, UIKit, React, Vue, Svelte, Angular, Compose, Android XML, React Native, Flutter, CSS, and HTML.
Context-aware suppressions avoid false positives for print CSS, reduced-motion blocks, progressive focus-visible patterns, and pseudo-elements.
Legal-hardening scripts strip Apple CDN images and preserve attribution while keeping topic structure useful for agents.

Verification

Detection rules cover common UI frameworks rather than assuming a single Apple-native stack.
Context-aware suppressions reduce false positives for intentional layout, platform, or route exceptions.
Severity thresholds separate blocking issues from design-review guidance.
Corpus refresh path keeps agent references aligned with guideline changes.

Selected projects

What I built

Stack

Selected projects

What I built

Stack