Wei Tan

A Master's thesis project implementing decentralised document attestation on Ethereum — multiple parties co-sign a file's SHA-256 hash on-chain, proving co-possession without uploading the file or trusting a central notary.

A privacy-first macOS menu bar app that visualises keystrokes and mouse activity across a 30-day window to reveal work rhythm and app-level attention patterns — fully on-device, zero telemetry.

A local-first Slack agent that intercepts @mentions, replies in your voice via Claude Code, and continuously distils your communication patterns and facts into a personal knowledge base — zero message history in the cloud.