Zarar's blog

You've seen the demos.

After decades of working with databases I didn't know that NOT VALID was a thing: ALTER TABLE line_item ADD CONSTRAINT line_item_variant_price_id_fkey FOREIGN KEY (variant_price_id) REFERENCES variant_prices(id) NOT VALID This is for cases when you…

Started a blog over at jumpcomedy.com and the first post tackled improvements that were made to reduce customer support emails.

Claude Code creator Boris Cherny made a bit of a stir when he said: “I don’t prompt Claude anymore.

Last week I took our Elixir/Phoenix suite (13,000 tests, 940 files) from 313 seconds to 64 seconds.

When you type a sentence into an AI, how does it figure out what you mean?

You may have heard that Anthropic was caught doing something sneaky which I want to explain without any of the technical stuff because the lesson is for everyone, especially if you're paying for AI tools or deciding whether your team should use them.

I had earlier written about using Hooks to enforce certain rules in AI-generated code.

This post is for developers who want to learn about the different planning approaches to take during agentic software development.

This post is for developers who use AGENTS.md or CLAUDE.md to provide guardrails for agent-generated code, but find that the agent sometimes ignores rules. if you want a deterministic check that will work 100% of the time, read on about agent hooks.

This post is for people who generally use Claude, Codex, or Gemini but have heard you can run open-source models locally for free.

I have completely stopped testing in anything other than Chrome on Mac and it hasn't affected me at all.