Stack

How I work with agents

Frontier models

Claude Fable 5.1 and Opus 5.5, GPT-6 Astra and Sol, Gemini 3.1 Pro and 3.8 Flash, Grok 4.7.

Skills

I wrote more than 70 open-source skills that teach agents to use each library correctly and follow the code patterns I want in a codebase.

Guardrails

Strict types, lint rules and tests run on every change.

Parallel work

Subagents run research, implementation and review in parallel.

Human review

I read every diff before it merges.

Language and runtime

TypeScript

My main language, with strict mode on.

Bun

Runtime, package manager, test runner and bundler.

Node.js

When a platform or client requires it.

Effect

Typed errors, services and concurrency. I publish Effect v4 libraries.

Zod

Schemas for validation and types.

Frontend

React 19

Server and client components, actions, Suspense.

TanStack Start

Full-stack React with type-safe server functions.

TanStack Router

Typed routes, params and search state.

TanStack Query

Server state, caching and optimistic updates.

TanStack Form

Typed forms with schema validation.

Next.js 16

App Router, server actions, ISR and caching.

Base UI

Accessible unstyled components.

shadcn/ui

Component source I copy into the project.

Tailwind CSS 4

Design tokens and utility styling.

Motion

UI animation.

Tiptap

Rich text and document editors.

TanStack Table

Headless data grids with sorting, filters and paging.

D3 and visx

Custom charts.

Storybook

Component development and review.

Backend

Elysia

Bun-native HTTP with end-to-end types.

oRPC

Typed RPC that also speaks OpenAPI.

Better Auth

Sessions, OAuth, organizations and 2FA.

Drizzle ORM

Schema, queries and migrations.

PostgreSQL

My default database.

Redis

Cache, sessions, rate limits and queues.

BullMQ

Background jobs with retries and schedules.

Trigger.dev

Long-running jobs and workflows.

React Email

Transactional email built as components.

ClickHouse

Analytics on large event tables.

Kafka

Event streams between services.

AI in products

Vercel AI SDK

Streaming, tool calls and structured output across providers.

Agents and MCP

Tool-calling agents and MCP servers.

OpenAPI to MCP

cabrakan, my CLI that creates an MCP server from an OpenAPI spec.

Model mix

OpenAI, Anthropic, Google, xAI, Mistral, DeepSeek, Llama and Groq.

ElevenLabs

Voice generation and voice agents.

Infrastructure

Cloudflare Workers

APIs and proxies at the edge. KV, D1, R2.

Vercel

Frontend hosting and previews.

Railway

Services, databases and templates.

Wrangler

Deploys and local dev for Workers.

Docker

Builds and local services.

AWS S3

Object storage.

Upstash

Serverless Redis for caching and rate limits.

Vite

Dev server and builds.

Quality and insight

Sentry

Error tracking and traces.

PostHog

Product analytics, funnels and flags.

Oxlint and Oxfmt

Linting and formatting, with my own rules in bellona.

Vitest

Unit and integration tests.

Playwright

End-to-end browser tests.

Testcontainers

Integration tests against Postgres and Redis in Docker.

Content and CMS

anhur

My tool that turns content files into typed data.

MDX and Markdown

Docs, blogs and changelogs next to the code.

Ghost

Blogs and publications. I maintain a Railway template for it.

Strapi and Directus

Headless CMS for client content teams.

Open-source packages

tsdown

Builds for npm libraries.

publint

Checks package.json before release.

Are the types wrong

Checks type exports for ESM and CJS.

Turborepo

Monorepos for packages and apps.

Agent tools

Claude Code

Terminal agent for multi-file work and long tasks.

OpenAI Codex

Coding agent on GPT-6 models.

Cursor

Editor with agents and frontier models.

GitHub Copilot

Inline help and PR work.

OpenCode

Open-source terminal agent.

Devin

Long background tasks.

CodeRabbit

Automated review on every pull request.

v0

UI drafts.

Warp

Terminal with built-in agents.