Define it
Application code and infrastructure in the same typed model. Dependencies become part of the program.
Effect + Alchemy+ INFRASTRUCTURE FOR AGENT-BUILT SOFTWARE
Give your agents
somewhere
to build.
A persistent home for the tools your agents create. Run them in isolation. Keep their data. Make them better with every session.
Design partner preview · Working foundation · Runnable prototype
CAPABILITY / RESEARCH-DIGESTInteractive model
01 / Define the capability
PERSISTENT TOOL
v1Research digest
Tenant data Isolated runtime Scoped input
A small tool. Its own data. A place to run.
01✓Resource graph resolved
02✓Tenant data attached
03✓Tool version 1 stored
records → summarize → digest
Illustrates the tested prototypeSee the evidence ↗
01 / SOFTWARE THAT OUTLIVES THE SESSION
Useful once.
Useful from now on.
Your agent builds a research tracker, a reporting tool, a tiny internal app. It works. Then the session ends.
Harness Compute is being built to give that software a durable home—with its execution, data, and permissions managed together.
Meet the capability model →02 / THE COMPLETE LIFECYCLE
From an idea
to a capability.
Build something useful.
Then keep making it useful.
Run it
Execute tool code in an isolated Worker. The trusted host decides what data and capabilities it receives.
Cloudflare Dynamic WorkersKeep it
Store the tool and its data beyond the current session. Upgrade behavior without replacing the underlying records.
Persistent source + D1Control it
Version capabilities and revoke access. Build a system that can change its mind about what should run.
Host-enforced boundaries03 / RUNNING CODE, BEFORE BIG PROMISES
The engine runs
in the cloud.
We ran Alchemy’s infrastructure engine inside a deployed Cloudflare Worker. It created a real resource, updated it, and deleted it—all from the Worker itself.
Read the reproduction →PROTOTYPE VALIDATION SEP 2026
14 / 14Application checks passed
locally and on live infrastructure
locally and on live infrastructure
- ✓ Data survived restart and redeployment
- ✓ Tool upgrades preserved existing data
- ✓ Tenant separation and revocation checked
- ✓ Worker-hosted infrastructure lifecycle verified
Functional evidence, not a production SLA. Durable deployment recovery is still ahead.
04 / START WITH ONE USEFUL THING
Small software.
Longer shelf life.
Tools that remember
A research tracker that keeps its sources and improves how it summarizes them.
PERSONAL SOFTWAREWorkflows that evolve
An internal reporting tool whose behavior changes without losing its working history.
TEAM UTILITIESEnvironments on demand
A bounded place to deploy and exercise agent-built code against actual infrastructure.
AGENT DEVELOPMENTThese are the workflows we want to build with design partners.
DESIGN PARTNER PREVIEW
What would your agent build
if it had somewhere to keep it?
Bring one real workflow. Help shape the runtime around it.
Let’s build it ↗