engineering

16 Sept 2026	The channel whose username is an empty string Ask for @durov and the username field comes back as "". Not null, not missing — the six real handles moved into an array, and only one of them belongs in a link.
16 Sept 2026	The comments on a Telegram post are not on the post They live in a linked discussion group with their own message ids, and a channel can have them on for one post and off for the next.
5 Sept 2026	A health check that returns 200 while everything else fails The liveness probe answered fine for an hour while every real endpoint returned 503. That is worse than having no probe.
5 Sept 2026	Why a Telegram bot cannot read the channel you want The Bot API is a permission boundary, not a missing feature. No amount of work gets you around it.