Things I’ve built,
things I ship.

A small Python kernel that keeps AI agents honest. Picks where to look for answers, tracks every claim against the source, and refuses to close a task that doesn't check out. There's a learning loop (lessons become skills, skills activate only on a passing proof), a 12-pattern design genome, and a 16-component code library — 9 render-verified in a browser, 7 reproduced from cited sources, render-proof pending. Wired into Claude Code via a global SessionStart hook since late May. The case-study page walks the loop.

Python·Agent kernel·Eval gates·Design genome·Code library·Witness receipts·Claude Code skill·interactive case study

A small IAM sandbox where everything actually works the way it would in production. Real tokens you can't forge, audit logs you can't quietly tamper with, revocation that takes effect in about a second, two-person approval for risky operations, and a page that's honest about what's real vs theatrical.

TypeScript·Express 5·Postgres·Drizzle·JWT·React·northbridge.zacgibson.work

A writing app for novelists. The v1 is live at jotterdown.app. The v2 rebuild — type naturally, every character and timeline event is tracked behind the scenes, and a single fact change shows you exactly which pages need to update before you commit — is in flight right now (manuscript-first UI in dev).

Astro 6·React islands·Tiptap·Supabase·Cloudflare Workers·Claude·jotterdown.app