Interchange is an ISO 8583 authorization switch that settles onchain, built to make one specific impedance mismatch visible: card payments are two-phase and reversible, blockchain writes are one-phase and final. It decodes real ISO 8583 over TCP, decides in 2.46 microseconds from an in-memory hold book, writes the 0110 approval to the socket before submitting the lock, and then treats the resulting hole (an approval nothing onchain backs) as the central design problem rather than an edge case. Backed by a Foundry invariant suite, 857 million fuzz executions with no findings, three-way reconciliation into eight break categories, and a browser protocol explainer that shows the mismatch byte by byte.

Crossbook is a noncustodial hybrid decentralized exchange where traders sign EIP-712 orders off-chain as gasless intents, a pure Rust matching engine crosses them, and an on-chain Solidity settlement contract re-verifies every signature and limit and swaps tokens atomically. It runs both continuous price-time matching and a CoW-style batch auction with a uniform clearing price per pair, plus multi-token ring trades, all backed by a live dashboard, a PoC threat model, cross-implementation differential fuzzing, and CI across the engine and contracts.

Assayer is an open-source token safety scanner in Rust. Given an ERC-20 address and a chain RPC, it forks live chain state at a pinned block with revm, simulates a real buy and sell through the chain''s DEX, statically inspects the bytecode and on-chain state, and returns a structured risk report: can you actually sell it, what are the buy and sell taxes, and does it hide mints, blacklists, pausability, or owner backdoors. It runs cross-chain on BNB Chain, Ethereum, and Base, ships as an embeddable library on crates.io plus a CLI and a self-hostable HTTP service with a web UI, and is hardened by an adversarial multi-agent review, a real-token fixture suite, and a never-panic robustness contract.

JER is a production-ready Bitcoin fork with automated CI/CD pipelines, multi-platform build automation via GitHub Actions, and enterprise-grade deployment infrastructure.

Valley is a lightweight, AI-aware desktop terminal for macOS — built on Tauri 2 + Rust + React 19 + xterm.js, featuring block-status rails, a Cmd+P omnibar, an embedded CodeMirror editor, libgit2-backed diff pane, and built-in AI chat with file and shell tools.

MyReceipt is a full-stack SaaS platform for digital receipts, replacing paper receipts with shareable, trackable digital ones — featuring a Go backend, Next.js frontend, AI-powered OCR, real-time WebSocket notifications, and POS integrations.

AssetBox is an inventory management system with automated data synchronization, webhook-driven notifications, and REST API integration for seamless asset tracking and real-time alerting workflows.

ChessMate is a chess web application with automated move calculation pipelines, REST API integration, and an AI engine featuring minimax algorithm with alpha-beta pruning optimization.

A modern Hacker News interface with automated content fetching pipelines, REST API integration, and real-time data synchronization for seamless tech news consumption.

Shorty is a high-performance URL shortener with automated caching pipelines, REST API endpoints, and workflow automation for URL validation, redirection tracking, and analytics processing.