frontend

JavaScript build tooling — Bun, Vite, and library bundlers (tsdown/Rolldown, esbuild).

Effect (TypeScript) — the Effect<A,E,R> model, layers/services, tagged errors, Schema, Stream, concurrency, the HTTP API, testing, and the runtime at the edge.

TypeScript — structural typing, generics, conditional/mapped/template-literal types, module resolution, and strict-mode idioms.

Marketplace

Everything: all skills, commands, and agents in one install.

Data and APIs — PostgreSQL (schema, migrations, performance), Drizzle ORM, and REST API design.

Core workflow: engineering-discipline, documentation, and workflow/automation methodology skills, plus every command and agent.

Cloudflare Developer Platform — the Workers runtime and Wrangler, plus Durable Objects, D1, KV/R2, Queues, Workers AI, and Static Assets.

GitHub — the object model and PR workflow, branch protection and merge model, Actions workflow YAML, and the REST/GraphQL API.