Agentic EngineeringNotes on building, testing, and shipping agent systems.https://andriykislitsyn.github.io/agentic-engineering/Review Router: the GitHub Action that learned to reviewhttps://andriykislitsyn.github.io/agentic-engineering/articles/review-router/https://andriykislitsyn.github.io/agentic-engineering/articles/review-router/A GitHub Action that routes pull requests to the right teams, and the AI reviewer bolted onto it. What works, what broke, and what is still unproven.Tue, 29 Sep 2026 00:00:00 GMTgithub-actionscode-reviewclaude-codeagentsRDS Postgres 12 to 16: what Blue/Green doesn't warn you abouthttps://andriykislitsyn.github.io/agentic-engineering/articles/rds-postgres-12-to-16/https://andriykislitsyn.github.io/agentic-engineering/articles/rds-postgres-12-to-16/Taking an old RDS database from about $650 to about $165 a month: deleting 280 million rows first, rehearsing on a real copy, and every place it broke along the way, with Claude Code running most of the commands.Mon, 28 Sep 2026 00:00:00 GMTpostgresawsrdsclaude-codeHow I set up Claude Codehttps://andriykislitsyn.github.io/agentic-engineering/articles/how-i-set-up-claude-code/https://andriykislitsyn.github.io/agentic-engineering/articles/how-i-set-up-claude-code/Four layers, each rule where it gets enforced. Permissions for hard stops, an output style for tone, CLAUDE.md for judgment, skills for depth.Sat, 26 Sep 2026 00:00:00 GMTclaude-codepermissionsworkflowSigned Git commits with GPGhttps://andriykislitsyn.github.io/agentic-engineering/articles/signed-git-commits/https://andriykislitsyn.github.io/agentic-engineering/articles/signed-git-commits/Git does not verify who made a commit. GPG signing does, and setup takes 5 minutes.Thu, 11 Jun 2026 00:00:00 GMTgitsecurityZsh setup with Oh My Zshhttps://andriykislitsyn.github.io/agentic-engineering/articles/zsh-setup-with-oh-my-zsh/https://andriykislitsyn.github.io/agentic-engineering/articles/zsh-setup-with-oh-my-zsh/A fresh macOS terminal in 15 minutes: Oh My Zsh, Powerlevel10k, plugins, and modern CLI replacements.Thu, 11 Jun 2026 00:00:00 GMTzshterminalShell startup: from 5s to 140mshttps://andriykislitsyn.github.io/agentic-engineering/articles/zshrc-from-5s-to-140ms/https://andriykislitsyn.github.io/agentic-engineering/articles/zshrc-from-5s-to-140ms/Lazy-loading NVM and virtualenvwrapper, and deduplicating compinit, took zsh startup from over 5 seconds to about 140ms.Thu, 11 Jun 2026 00:00:00 GMTzshperformance