Two years in the making. Claude, Codex, GPT, Figma and Cursor woven into one orchestrated workflow. Ariane is the reason our clients ship in eight weeks instead of six months.
[ 01 — WHY ARIANE EXISTS ]
Frontier models are extraordinary at different things. Claude reasons about systems. Codex writes production-grade code. GPT reviews logic at scale. Figma now talks back through MCP. Ariane is the conductor — routing each task to the model that does it best, under senior human supervision.
Ariane decides what runs where. Architecture goes to Claude. Code goes to Codex. Reasoning audits go to GPT. You never pay for a model doing what it's bad at.
Every output is graded against HDL's internal evals before it reaches a client. Code that fails ours is automatically retried with a different prompt — or a different model.
Ariane keeps state across sessions: architecture decisions, naming conventions, client preferences. Six weeks in, it still knows why we picked tRPC over GraphQL on day one.
Through MCP, Ariane reads Figma frames directly. Design tokens become CSS variables. Components become React files. No more redrawing the system in code.
Ariane proposes; the senior architect decides. Every commit is reviewed. Nothing ships to a client environment without a human signature.
The honest number: Ariane is why HDL Flagship runs at 8–12 weeks instead of 24, with three people instead of seven, at half the price of a traditional agency.
[ 02 — THE STACK ]
We don't bet on a single provider. We bet on the workflow. When a model gets replaced, Ariane swaps it without us rewriting the studio.
Long-context reasoning, system design, code review at the senior architect's elbow.
The workhorse. Writes the bulk of production code under tight Ariane prompts and guardrails.
Audits code, catches edge cases, scores outputs against the eval suite before review.
The IDE Ariane and the architect share. Inline diffs, agent runs, immediate human override.
Ariane reads Figma directly: tokens to CSS, components to React, frames to flow specs.
Our own delivery infrastructure. Ariane deploys here; clients run here. Documented uptime.
Internal grading suite. Every Ariane output passes our quality bar before a human sees it.
Ariane is a workflow, not a wrapper. Tomorrow's frontier model plugs into the same slot.
3× faster
Mean delivery vs. traditional agency
8 weeks
Average Flagship build
~50% cost
Of comparable scope elsewhere
100% senior
No juniors trained on your project
[ 03 — TWO YEARS OF QUIET WORK ]
We didn't announce Ariane. We used it. Every iteration was tested against a paying client before it became part of the system.
Claude as architect, GPT as code reviewer, a senior developer as conductor. Shipped a Flagship project in 11 weeks. The studio understood: this works.
The architect's IDE becomes the meeting point. Inline AI diffs, real-time agent runs, immediate human override. Velocity doubles again.
We stop trusting model output by default. Every code change passes our own grading suite before a human reviews it. False starts collapse by 70%.
Design becomes a first-class data source. Ariane reads frames directly — tokens to CSS, components to React — and design drift drops to near zero.
Six clients in active delivery. Claude, Codex, GPT running in concert. Eight-week Flagship is the new normal, not the exception.
[ 04 — STRAIGHT ANSWERS ]
No. Ariane is HDL's internal delivery engine. You can't buy it. You can hire HDL and the work will be delivered with it.
No. Every model in Ariane is configured with zero retention. Your code is not used to train anyone, including us.
The Ariane workflow stays. The model in the slot changes. We've already swapped GPT and Claude without breaking a single project.
A senior human is always reading and approving the code. Ariane writes the draft; the architect ships the commit. Nothing reaches your environment without a human signature.
Like the difference between a piano and an orchestra. A single model is a tool. Ariane is the workflow, the routing, the evals, the memory, the design integration and the senior supervision around the tools.
Book a thirty-minute call. We'll show you Ariane delivering — live, in a real project, end to end.
Book 30 min with Pierre