Test Bed

Learn Morse code the right way — at full speed, from day one.

An iOS app implementing the Koch method for Morse code. The entire implementation was driven by a formal Z specification written first in Z Spec — the spec preceded the code.

• Koch method: characters introduced in order of recognizability
• Four training modes: Receive, Send, Ear Training, QSO simulation
• Spaced repetition scheduling adapts to your accuracy
• Free, no ads, no tracking — all data stored locally
• Implementation driven by formal Z specification

A text adventure engine where AI narrates your choices.

Game engine and server for text adventures playable via Claude Code, CLI, or web client. Three binaries: cryptd (server with LLM narrator and rules engine), crypt (player CLI with Bubble Tea TUI), and crypt-admin (graph-first scenario authoring). Replaces Dungeon with a real game engine instead of pure prompts.

• Three binaries — server (game engine), client (TUI), admin (scenario authoring)
• LLM narrator with rules engine fallback — consistent game logic, expressive prose
• Graph-first scenario design — adventures are directed graphs with conditions and state
• Concurrent sessions — multiple players share one daemon
• Lux visualization — live game map and state display