Ezzy Rappeport

About

I build across product interfaces and the systems behind them, with a focus on agent tooling, native software, and verification. Based in California and open to software and AI opportunities.

Selected work

• Downright

  Creator & Engineer · 2026

  Markdown, treated like a Mac document.

  I built the native document experience, exact-source editing, and Finder integration.

• MonkeyClaw

  Engineering Contributor · 2026

  Tests agent sandboxes, reproduces failures, and checks that defenses leave evidence.

  My contributions: native telemetry ingestion, transcript replay, and the evidence dashboard. Follow one recorded demo finding.

• FlowE

  Founder & CEO · 2026

  Coursework, calendars, and focus in one iOS app. Start with a brain dump; leave with a plan for today.

  A native SwiftUI build with Canvas sync, real-time tasks, and offline retry.

• Etch

  Founder & Engineer · 2026

  AI-assisted hardware design where generated RTL earns its way through verification.

  A saved FIFO design run with simulation, bounded-formal checks, and a proof dossier. Physical signoff pending.

• Argyph

  Creator & Engineer · 2026

  Useful codebase context for coding agents, through one local MCP server. No cloud account required.

  A released Rust CLI with 19 tools, distributed through npm, crates.io, and Homebrew.

Tools & practice

• TypeScript / React / Next.js
• Rust
• Python
• Swift / SwiftUI
• Agent systems
• Verification & evals
• WebGL / GLSL