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Software engineering as a commodity: agents that code, workflows that scale, infrastructure that works. Built with the DeesseJS ecosystem.

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© 2026 DeesseJS. All rights reserved.

The ecosystem

The DeesseJS ecosystem.

DeesseJS is more than a templates registry — it's a stack of small apps, SDKs, and shared contracts that ship together. Each sub-domain earns its place by solving one problem end to end, and they all talk to each other through the same contracts.

Sub-domains

Click any to open in a new tab — each product lives at its own URL, alongside this site.

ERRShipping

Errors

Structured error tracking — the missing signal in any agent-driven stack.

errors.deessejs.com
DRPCIn beta

DRPC

Durable RPC primitives for long-running agent workflows.

drpc.deessejs.com
CLShipping

Collections

Type-safe data access for the contracts your templates already publish.

collections.deessejs.com
FPShipping

FP

Functional primitives the SDK leans on — small, sharp, no runtime cost.

fp.deessejs.com
UIShipping

UI

Component library on top of shadcn — the DeesseJS look across every surface.

ui.deessejs.com
ADMIn beta

Admin

Operator console for the apps you ship — auth, billing, audit, all reachable.

admin.deessejs.com
CLComing soon

Cloud

Hosted runtime for the templates — preview, deploy, observe, scale.

cloud.deessejs.com
TTShipping

type-testing

Assertion-style type tests for the SDKs and shared contracts — positive, negative, and deep inference in one suite.

www.npmjs.com/package/@deessejs/type-testing

What holds it together

One contract, every surface

Errors, Collections, and FP all speak the same Zod shape. A change in the contract propagates to every consumer on publish — same as the templates.

Open source by default

Every sub-domain ships MIT when it's stable enough. The brand, the marketplace, and the curated registry stay ours — the source-code ecosystem is shared.

Smallest useful version first

Each sub-domain enters the ecosystem in alpha, stays in beta until it earns a production install, and only then opens to third-party contributors.

Read next

AboutWho we are, and how we got here.ManifestoWhy we're here — the beliefs behind the work.PrinciplesHow we work, day to day.VisionWhere this is going next.

Start here

The fastest way into the ecosystem is a template — it pulls the same contract and the same defaults as the apps above.

Browse templatesRead the manifesto