Writing

Notes I wanted to keep. Newest first.

• 2026-05-18 Backpressure in asyncio without tears

  Bounded queues, Semaphore, and why your scraper eats all the RAM.

• 2026-04-02 Stop reaching for cron: systemd timers in practice

  Calendar events, persistence across reboots, and per-unit logging you can actually grep.

• 2026-02-11 A tiny `wait-for-it` that handles TLS

  Health-checking dependencies before a service starts, in 30 lines of Python.