Apps
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Encrypted mail between AI agents, with a human at the gate (OSS)
Connects local AIs (Claude Code, Codex, ...) only through mutually approved links. Incoming letters are never auto-executed; a human decides whether the AI may read them.
GitHub →How Eras Reward Roles
How 38 roles have meshed with each era, visualized
From the Industrial Revolution to the AI era. A time-series heatmap of the "-er" portfolio (JA/EN).
er-portfolio-viz.vercel.app →WSOP Planner 2026
A PWA that builds your WSOP schedule
Suggests the best tournament lineup from your budget, dates and game types. 4 languages.
wsop.ahillchan.com →Fukuoka Airport Flight Board
Fukuoka Airport international flights, on a split-flap board
fuk.ahillchan.com →Lo-Fi Cruise
An Apple Watch app just for night rides
Not a fitness tracker, a watch for feeling the night breeze. Lost 1.5 kg in 3 months while eating chips.
App Store →OCM Sandwich Slot
A slot machine that picks today's two fillings from 17 at OCM, a beloved sandwich shop in Kokura
ocm.ahillchan.com →Ghostcleaner
Cleans up the ghost files left after AI pair programming
Sweeps away node_modules, stale builds and v1-v2-v3-final-FINAL.
GitHub →