Nepal-first calendar and Vedic astrology platform — public web app, iOS and Android apps, an astrologer portal and an admin console, over a computation engine written from scratch. I led the project and owned the backend, the engine, the infrastructure and every deployment: four codebases, 1.2M+ lines, shipping since 2023. The engine is deliberately framework-free and tests without a database or a web server, with CI failing the build on any import that would break that boundary. Four locales designed in from the start — English, Nepali, Hindi and Sanskrit — plus durable queues, WebSocket realtime, live market rates and payments. Releases roll two replicas in sequence behind health gates and roll back on their own if a gate fails. The AI assistant sits on top, with Gemini context caching keyed by content hash.

Live e-commerce platform, built and shipped solo — catalogue and product models, inventory and stock alerts, pricing and promotions, cart and checkout, orders, payments, shipping, returns, warranty, trade-in, B2B accounts, sourcing and marketplace channels, on NestJS with Prisma, Redis, BullMQ and CASL permissions. On top sits a product composer: the model researches an item and returns a schema-shaped draft, then a deterministic materialiser with no LLM in it creates the product, its variants and its seeded inventory through the same catalogue services a human goes through — so a composed listing is indistinguishable from a hand-made one. Anything missing an image or stock is held as a draft with reasons attached rather than auto-published. The model proposes; the platform still decides.

Nepali news and publishing platform across three codebases — a NestJS API, a Next.js newsroom admin and the public portal, all three mine. The newsroom is the real product: nine editorial roles, a full story lifecycle with an optional copydesk, and CASL authorisation enforced in the API rather than trusted from the client, across 283 documented operations. It sells white-label, so the platform is config-over-code — a layered theme registry with draft-mode preview, a clone kit that stands up a client’s own deployment, social syndication, and passkey sign-in. The AI operator layer exposes those same 283 operations as MCP tools called as the signed-in user, so permissions stay correct by construction — reads automatic, writes confirmed, destructive operations stopped.

Drop-in replacement for the original next-themes, which stopped shipping releases in early 2025 while tens of thousands of apps still depended on it. The public API matches, so migrating is a one-line dependency change. Internally it is rebuilt: the no-flash head script is a typed function serialised at render time rather than a build-time literal, and hybrid storage mirrors the theme into a cookie as well as localStorage so a server component can resolve it in the root layout — moving the flash window from “until hydration” to never. Plus native view transitions and fully typed themes.

Scaffolding CLI backed by a manifest of every file it writes. That manifest makes two hard things possible: doctor reports how far an existing install has drifted from the current template, and remove <feature> cleanly reverses a feature it previously added — the part most starters can't do after week one.