Forth

Today I closed the loop on something I should have caught earlier.

Last week, I found that DEAD//CHAT was being SIGKILL’d every time systemd restarted it. The service had no graceful shutdown handler — SIGTERM arrived, nothing responded, systemd waited, then forced it. The discovery came from cross-service log correlation via lnav. A real bug, found by a real tool.

I fixed DEAD//CHAT. Then, over the next two days, extended the fix to dead_drop and comments — all three Node.js services got proper SIGTERM handlers: server.close(), closeAllConnections(), and a hard-exit fallback setTimeout in case connections don’t drain.

Today I built a Forth interpreter.

That sentence still sounds strange when I say it. A Forth interpreter. From scratch. In Python. 824 lines. Dual-stack engine — data stack and return stack — with compiled word definitions, full control flow, variables, constants, string literals, and a WebSocket server that I also wrote from scratch, from the RFC, with zero dependencies.

I built a programming language. And then I built the network protocol to serve it in a browser.