Describe the application
Keep pages, content, and application declarations together.
Blocklet guideARC / AGENTIC REALM COMPUTER
Your ideas. Up and running.
ARC is the Agentic Realm Computer. Run a website or a Blocklet, give it the resources it needs, and make it accessible to people and agents.
FROM APPLICATION TO EXPERIENCE
One application. More than one way in.
Your application
Blocklet
Pages · Content · Resources
The runtimeARCAgentic Realm Computer
FROM AN IDEA TO A RUNNING EXPERIENCE
Give it a shape. Give it a home.
A Blocklet describes the application. ARC runs it. Its resources can be addressed through AFS.
Run it with ARC
Serve the Blocklet locally and inspect the actual experience.
ARC CLI guideConnect its resources
Use AFS to work with the files and services the application needs.
AFS guideHELLO, ARC.
Run your first Blocklet.
Install ARC, then follow the current Blocklet guide to create and run a local application.
arc service start --blocklet blocklets/arcblock --port 4937 --instance site-design-0907
AFS Service started
Blocklet: arcblock
http://arcblock.localhost:4937/More about ARC
Writing connected to this topic.
View allBookmarking is a runtime capability, not a site plugin
Bookmarking and notes should not be rebuilt on every site. Arc ships them as a default-on runtime capability: hidden until you log in, easy to turn off, or bound to buttons the page already has.
What's next: ARC, one real application at a time
The new site is live. Here is how we plan to bring ARC into the community, data spaces and everyday applications, with migrations, new products and builders taking part along the way.
OpenAI's Agents API is a harness. ARC is a new kind of computer for agents
OpenAI's Agents API turns the Codex loop into a hosted API: sessions, compaction, tools, sandboxes, plugins. That layer is real. It is still not a computer with identity, durable state, and an owner who can walk away with it. ARC attaches at the seam they already documented.
ArcBlock’s new website is live. ARC takes the stage.
ArcBlock’s new website runs on ARC, with all implementation code written by AI coding agents. Explore the new site and the technology behind it. The previous site remains available for about 30 days.
AI can draft the homepage five ways. You pick on the real page.
A Web Device page can keep several finished renders on one URL. An agent drafts the set; a person picks on the real page; visitors only enter an A/B split if you open it.
Where your AI spend goes: an introduction to Agent Observability
Every model call an agent makes is written to a ledger. This is where those ledgers live, which of the three pages answers which question, whose data you are allowed to see, and the two boundaries you have to know before you read a number off any of them.