Hadrian closed beta: treat Appian like a real codebase
Appian is a great place to build the back-end of a business but it can be a frustrating place to ship code from.
You author in a browser. You click through a tree of objects to make a change. You have to work on the same code branch as the rest of your team, and merge conflicts can be a complete show stopper.
We have been doing this work for years. We built Hadrian so we — and you — never have to do it the same way again.
What it is
Hadrian is an agent harness for Appian development. The distinction matters: the coding agent reasons about your request and decides what to build; Hadrian surrounds that agent with the tools, context, and guardrails it needs to work safely with Appian.
You write a plain-English spec. The agent plans the objects while Hadrian generates typed SAIL, writes the schema migration, validates the result, packages the deploy, and ships it through Appian’s standard Deployment REST API.
You stay in your editor. You commit to your repo. You review the change like any other code review. Hadrian handles the mechanical work that used to require clicking through Designer.
What it can build today
All the Standard Tier Appian application objects.
Why it is different
LLMs today attempt to produce valid SAIL, but regularly come up with invalid or incomplete code. Hadrian sits a layer below that. The LLM picks intent; deterministic generators emit the actual objects. Every record type, every interface, every expression rule round-trips through a typechecker before it touches your environment.
The wedge:
- Plain English in, shipped Appian out. No more click-through Designer for the mechanical work.
- Your Appian. Your repo. BYOK end to end. Hadrian runs against your existing environment through the standard Deployment REST API, and generation runs through your own model provider account rather than ours.
- Engineered, not vibe-coded. Real type-checked SAIL ensures code is valid before it touches your environment.
Treat Appian like a real codebase
The pitch in one line. Specs in git. Generated objects in git. Migrations in git. Reviews. Branches. CI. The workflow primitives the rest of the development world has taken for granted for a decade, finally landing on the Appian side of the wall.
What you need to bring
- An Appian environment
- A Claude subscription
That’s it. Hadrian runs on infrastructure dedicated to you, hosted in Canada by default or in the region you prefer. Changes are sent to your environment through Appian’s standard deployment flow, so your existing review gates continue to apply.
Closed beta is open
We are taking a small first cohort. Consultancies, in-house teams, anyone who has shipped Appian recently and has a feature they want to build with an agent using Hadrian.
If that is you, request beta access. Tell us what Appian version you are on and the first thing you want Hadrian to build. We will reach out.