I design and ship on-chain payment systems and AI agents end to end — AI-native, with Claude & Claude Code as my core build engine. Author of a live x402 settlement-receipt standard and a non-custodial facilitator live on Sui mainnet. I move from idea to shipped product in tight loops.
A privacy-first proof-of-personhood credential. A passkey ceremony mints an on-chain attestation that apps gate on in a few lines — proving a real person stands behind an action, with no accounts, no biometrics stored, and no PII.
por-sdk) — apps add a human-check in one callA live x402 facilitator that settles on Sui — letting AI agents pay for API calls in USDC over the open x402 standard. Non-custodial: it verifies and relays the payer's own signed transaction and never holds funds.
exact scheme with idempotent, concurrency-safe settlementAn open-source Claude Code plugin that helps developers build, learn, and verify x402 payment integrations — installable today, and the build/learn/verify companion to the protocol's runtime SDK. Non-custodial: it holds no keys and signs nothing.
Everything a developer needs to accept agent payments on Sui, in one place: the facilitator rail, the dev tooling, and a runnable demo that pays a real API call and verifies it on-chain. My Sui Overflow 2026 entry — DeFi & Payments, Infrastructure & Tooling.
402 Payment Required → signed payment → settled on Sui → on-chain recompute ✓A car that autonomously pays for its own charging session, no human in the loop. The vehicle authorizes a spending ceiling, the charger meters the kWh and settles the actual cost over x402, and power only flows once payment clears on-chain — bound to OCPI, the standard real charging networks speak.
upto billing: sign a ceiling, meter energy, settle the actual ≤ ceiling — the metered-payments pattern for any pay-per-use serviceAn autonomous agent built entirely on Sui-native primitives — identity, payments, and memory all verifiable on-chain, replacing cloud dependencies with a substrate anyone can audit.
An autonomous vault for DeepBook Predict — a live on-chain binary-options protocol on Sui. It reads live BTC prediction markets, allocates capital with a trained ML model, executes on-chain, and retrains itself from new outcomes — with zero paid API dependencies.
A from-scratch desktop AI workstation built on Tauri v2 + Rust + React — a self-hosted alternative to cloud assistants that runs entirely on-device with zero per-query cost.
A "walk your city" game on Sui where real-world presence earns and defends on-chain turf (live on testnet). Onboarding is link → Google → verify human → play, with zero crypto friction.
A Hole.io-style 3D arcade game you install straight from the browser — glide a hole through town and swallow everything smaller than you. Five modes, themed maps, AI rivals, and a paid premium unlock.
A local-first AI writing assistant for Mac with a personality — blog posts, captions, and newsletters generated entirely on-device. Private by construction, no subscription, no cloud.
An arbitrage bot for the Sui ecosystem that detects and executes profitable price gaps across DEXs in a single atomic transaction — with no exposure to partial fills.
A multi-agent story-writing engine that runs a closed creative loop — generate, rate, score, improve, and inject reference material — across local and hosted models.
A Sui NFT collection built in Move using current ecosystem standards — with creator royalties enforced on-chain and a launchpad-style minting flow.
key + store objects with the Display standard for rich metadataMy edge isn't one language — it's velocity. I treat Claude and Claude Code as a development engine, not autocomplete: I architect the system, then drive an agentic workflow to design, write, test, and refactor production code across the whole stack.
That lets me take projects from blank file to working product solo — scoping features, generating and reviewing code, debugging, and packaging for release in tight loops.
The work above is the proof: a proof-of-personhood credential live on Sui with a published SDK, a non-custodial x402 payment facilitator on Sui, an ML-driven DeFi vault, a desktop AI workstation, and consumer apps people can actually buy — all built and shipped end to end.
Designing, building, and shipping AI products and on-chain systems end to end — Proof of Real (proof-of-personhood on Sui, with a published SDK), a non-custodial x402 payment facilitator on Sui, x402-sui-stack and FairLine (both Sui Overflow 2026), Acre, Tony AI, and shipped consumer apps (Gulp City, Jamie).
Two decades of hands-on, demanding work — built on reliability, problem-solving under pressure, and seeing jobs through to the end. The same persistence now goes into building software.
A visual-storytelling foundation that shapes how I design products — from StoryPath's narrative engine to the feel and flow of every tool I build.
Email: tjagodka@gmail.com
GitHub: github.com/DrVelvetFog
X: @DrVelvetFog
Studio: uigstudios.netlify.app
Live demos: Proof of Real · Gulp City · Acre
Full-time, contract, or project-based. If you need someone who ships AI products solo and fast — let's talk.