mike@luff:~$
mike@luff:~$ whoami
uid=1337(mike) gid=1337(builder)
groups=apps,agents,smart-wallets
role=Founder @ LUFF
Manual · reduced motion

Xinchen
"Mike" Liu

Founder of LUFF · Engineer

I founded LUFF. Today I build apps and agent infrastructure, drawing on work across passkey smart wallets, onchain payments, and verifiable credentials.

Hackathon recognition
3× Prize Winner
Startups
LUFF · Validity · CollegeFork

$ ls -la ~/projects/featured

Independent software, production infrastructure, and award-winning projects

Marginalia

LUFF · TestFlight beta

A local-first personal library for articles, podcasts, and notes. Read, listen, highlight, and connect AI tools with explicit access controls.

Apple AppsLocal FirstAgent Access

Validity.id

Co-founder · University credentials

Co-founded the academic credential verification platform. Led blockchain engineering and full-stack diploma deployment, working with the Duke Registrar on credential issuance and verification.

Smart ContractsVerifiable CredentialsFull Stack

Gemini Wallet

Previous work at Gemini

Self-custodial smart wallet powered by passkeys, modular accounts, and embedded onchain access.

ERC-7579PasskeysSmart Accounts

Gemini Onchain

Previous work at Gemini

Onchain hub for wallet-native trading, dapp access, and regulated crypto market workflows.

WalletConnectDeFiGUSD

viral.games

ETHOnline 2024 finalist + prizes

Prediction markets for social media virality.

Next.jsBlockchainSocial APIs

dustsweeper.xyz

ETH Denver 2022 #1

DEX for cleaning up small token balances.

ReactSmart ContractsDeFi

patchwallet.com

ETH-Online 2022 Winner

First social ERC-4337 wallet in production.

ReactERC-4337Account Abstraction

usr.id

Production

Cross-chain ENS resolver with CCIP.

CCIPENSCross-chain
~/systems/ai-infra.md

AI components need verifiable edges

The through-line is infrastructure for systems that act under constraint: wallets, markets, and agents. The interesting part is not just adding AI to products. It is making the AI layer inspectable enough to trust with real authority.

agent-architecture.trace
01. Inspectable orchestration
Model routing should expose policy, trace, cost, context, and replay hooks instead of hiding the conductor.
02. Memory with provenance
Durable agent memory needs raw records, boundary anchors, compressed gist, and reversible maintenance policy.
03. Bounded authority
Useful agents need enforceable scopes: what they can spend, erase, promote, sign, or delegate.

Smart Wallets

Passkey signing, modular accounts, ownership standards, and safer account abstraction surfaces.

ERC-7579 / ERC-7978

Market Infrastructure

Settlement, attestations, prediction-market flows, and interfaces between regulated and onchain systems.

Previous work at Gemini

Agent Systems

Inspectable memory, routing, authority, and audit trails for AI tools that act on behalf of people.

Toolsperson / Claw
current-focus.log
[NOW] LUFF · Apps & Agent Infrastructure
Stockpea — inventory and meal preparation (in development)
Agent tooling — memory, routing, and scoped authority
→ Building useful products with understandable interfaces and clear control over data, permissions, and payments