Software,
crafted in
precision.

A small, design-forward studio casting AI-native tools for the Mac, the iPhone, and the open browser. We treat software the way master craftsmen treat metal — with patience, precision, and the conviction that the object should outlive the trend.

14
Pieces shipped
3.2m
Daily users served
100%
Independently held
O OPTIMUS · FOUNDRY · EST · MMXXVI
Heat · Pressure · Precision
Cast in focus Forged for the open browser Tempered by real users Built to outlive trends Cast in focus Forged for the open browser Tempered by real users Built to outlive trends
01 The studio

Heavy software,
quietly made.

Most software today is liquid — endlessly poured, infinitely reshaped, optimized for the next quarter. We work the other way around. Every product leaves the foundry as a finished thing, with weight, with edges, with a particular grain.

Our tools are built one at a time, in small batches, by a team that fits in a single room. We choose our commissions carefully and refuse most of them.

PRINCIPLE 01

Make it hold up
in the hand.

Software has weight, even when invisible. Latency, error states, the defaults we choose, the way a button responds — these are tactile decisions, in the interface and underneath it. We never ship a tool that feels weightless.

PRINCIPLE 02

The simplest path
is rarely shorter.

A single hot key that does what three menus did is not less work — it is more. We spend the engineering hours upstream so that our users spend zero downstream. The same trade governs every layer: the schema, the prompt, the API surface, the type system.

PRINCIPLE 03

Outlive the
trend cycle.

We bet on rhythms longer than the launch calendar. Frameworks, schemas, type systems, motion language — chosen so that two years from now the work still reads as deliberate, not nostalgic.

Five metals.
One forge.

We work across five practices — each with its own grain. Sometimes a single project moves through all five; usually it lives in one. We never staff up beyond what fits in one room.

01 / Full-stack apps

Apps that ship,
not apps that demo.

Web applications end-to-end — frontend, backend, database, deploy. The kind that hold up after the launch post fades and the third user starts pushing edges the founder didn't think to cover.

TypeScript React Postgres Edge
02 / iOS apps

Native to the device,
not the trend.

Swift, SwiftUI, the platform conventions taken seriously. We build iOS pieces the way Apple's own teams do — keyboard-first, Dynamic Type ready, opinionated about what the OS is for.

Swift SwiftUI iPadOS App Store
03 / Backends

Systems that carry
the load.

APIs, queues, jobs, observability. We design backends to survive their own success — boring where it counts, instrumented from day one, and operable by a small team without a war room.

Go Postgres Redis AWS
04 / Agentic workflows

Agents that finish
the task.

Multi-step tool use, evals, fallbacks, human checkpoints. We build agents the way a foreman runs a shop floor — explicit handoffs, audit trails, and the right cost ceiling. Most of the work is the scaffolding around the model.

Claude Tools Evals MCP
05 / Design systems

Components built to last past v1.

Tokens, primitives, documentation, motion language. We design systems the way a foundry treats its casting molds — built once with care, so that the team shipping next year still reads them as sharp.

Tokens React Figma Docs

Selected casts.

03 Studio archive · 2024–2026
01 / 14
Anvil iOS
Personal CRM for people who hate CRMs. Voice notes in, structured contacts out. Won 'Mac App of the Day' three times.
PRODUCT · AI · iOS
2026 · Ongoing
02 / 14
Bellows for Linear
Inline AI assistant that turns shipped pull requests into release notes the engineers actually want to read.
AI · WEB
2025
03 / 14
Cinder type system
Foundry's in-house display family. Three weights, two opticals, and a set of contextual ligatures we are slowly licensing out.
TYPE · BRAND
2025 · 2026
04 / 14
Plinth browser
A reading-first browser commissioned by a private research lab. Vertical tabs, pinned scratchpad, AI-summarized reading queue.
PRODUCT · MAC
2025
05 / 14
Quench identity
Brand identity and editorial system for a Tokyo-based AI hardware studio. Print catalogue, on-product type, packaging.
IDENTITY · PRINT
2025
06 / 14
Forge handbook
200-page studio operating manual published as both a printed volume and a static site. Used as reference by four other studios.
EDITORIAL · WEB
2024 · 2026
04 How we work

Four passes
through the forge.

i

Brief

A short, written contract. We agree on the problem, the scope, and what is explicitly out of scope. Always shorter than you'd expect.

ii

Cast

The first working artifact, rough but real. Always interactive, never a deck. We'd rather show you a clumsy v0 than a polished mockup.

iii

Temper

Iteration in tight loops with a small group of real users. We track decisions, not features. Most of the value lives in this phase.

iv

Stamp

The piece ships with a versioned, signed manual. We're available for one round of post-launch refinement, then we stay out of the way.

05 Get in touch

We're growing
compounding.

If you have a piece of software that needs to exist — particular, built once and built right — we'd like to hear about it.