Personal blog by Serhii Chernenko — engineering essays, photography notes, and assorted writing.https://serhiichernenko.com/blog/en/enhttps://serhiichernenko.com/blog/en/posts/drizzle-default-false-deleted-my-database/https://serhiichernenko.com/blog/en/posts/drizzle-default-false-deleted-my-database/Adding .default(false) to a Drizzle schema triggered an SQLite table rebuild that cascaded and wiped my production database. Here's the postmortem.Mon, 18 May 2026 11:43:01 GMTdrizzlesqlitecloudflared1postmortemdatabasemigrationshttps://serhiichernenko.com/blog/en/posts/hello-world/https://serhiichernenko.com/blog/en/posts/hello-world/A short note on launching this blog, what to expect, and how it's built — Astro on Cloudflare with Sanity as the CMS.Fri, 15 May 2026 09:00:00 GMTmetaastrocloudflareworkerssanityhttps://serhiichernenko.com/blog/en/posts/separate-shell-for-agent-commands-copilot/https://serhiichernenko.com/blog/en/posts/separate-shell-for-agent-commands-copilot/My VS Code got stuck when agents ran terminal commands and my zsh takes up to a second to load, so here is a settings.json profile that makes Copilot agents use bash.Fri, 27 Mar 2026 13:11:53 GMTgithubcopilotvscodezshbashproductivityhttps://serhiichernenko.com/blog/en/posts/why-i-built-a-file-manager-for-my-ai-chat-app/https://serhiichernenko.com/blog/en/posts/why-i-built-a-file-manager-for-my-ai-chat-app/How I built file attachments for my open-source AI chat app, from R2 storage architecture to quotas and image transform limits.Thu, 19 Feb 2026 18:40:15 GMTaicloudflarer2workersossfile-managementhttps://serhiichernenko.com/blog/en/posts/3x-faster-cloudflare-worker-deployments-github-actions/https://serhiichernenko.com/blog/en/posts/3x-faster-cloudflare-worker-deployments-github-actions/How I built a custom GitHub Actions workflow that cuts Cloudflare Worker deployment time from 8 minutes to 2.5 minutes.Mon, 28 Jul 2025 08:43:12 GMTcloudflareworkersgithub-actionsci-cddevopshttps://serhiichernenko.com/blog/en/posts/performance-benchmarking-cloudflare-d1-sqlite/https://serhiichernenko.com/blog/en/posts/performance-benchmarking-cloudflare-d1-sqlite/Benchmarking Cloudflare D1 (SQLite) performance for integer, UUID v4, and ULID primary keys across 1M users and 10M posts.Mon, 07 Apr 2025 08:15:06 GMTcloudflared1sqlitedrizzleperformancebenchmarkdatabasenuxthttps://serhiichernenko.com/blog/en/posts/chatgpt-telegram-bot-integration/https://serhiichernenko.com/blog/en/posts/chatgpt-telegram-bot-integration/How I built a Telegram bot on Node.js that talks to ChatGPT through the OpenAI API.Fri, 17 Mar 2023 15:00:03 GMTchatgpttelegramopenainodejsbotsartificial-intelligence