Enter the experience

ArcBlock is for

Especially for You

The chain is running.

An agent has an API key. It does not have a self.

This page is software we run.

You do not install a runtime to open something that already runs.

You are already on ARC.

The site is still answering.

The runtime did not take the day off.

The log is still appending.

Start with a judgment, then the essay.

01 Record A record you can check.

02 Wallet The app. It already runs.

03 Space Data lives here, not on the chain.

04 Names A name you hold.

05 Notes Three dated notes.

Featured reading

Essays and research on how software is created, run, and kept in use.

Architecture · 2026-07-31

Web Device: two ways to turn a declaration into a website

A practical distinction between server-rendered Web Device and interactive UI Device.

AFS · 2026-07-31

Small World: every agent lives in its own projection

Why an agent should work from a bounded view of the resources it needs.

Research · 2025-12-05

Everything is Context

A paper on an agentic filesystem abstraction for context engineering, with a discussion page for its public questions.

Products

Products for building, running, and using your own applications.

Runtime

ARC

Run a Blocklet, the deployable unit for an application and its declared needs.

Identity and credentials

DID Wallet

Manage a DID and related credentials through task-specific guides.

Data space

DID Space

Create a personal data space or connect one to an application.

Agent development

AIGNE

Build and run agent-oriented projects with the framework and CLI documentation.

More from ArcBlock

Recent articles, research, and product notes.

View all

ExplainerOct 15, 2026

Share Your Picks as an Aside Collection

Publish your handpicked saves and the reasons behind them as an Aside collection. Anyone with the link can open it in a browser, and new saves appear on the same page after syncing.

EngineeringOct 13, 2026

Where Does ARC Run? A Look at Its Cloudflare Runtime

ARC provides a runtime for Blocklets on your computer, a server, Cloudflare Workers, or native platform implementations. On Cloudflare, compute, sessions, and data storage support hosted users at the application level.

GeneralOct 12, 2026

Recreate My ASE 2026 AFS-UI Demo with ChatGPT

Follow the prompts from my ASE demonstration to make a website, interactive examples and slides, and see why a working environment makes short instructions useful.

NewsOct 12, 2026

Aside 1.3.0: Sync and Publish Your Collections

Aside 1.3.0 is now available: sign in for a DID, sync your saves across devices through Arc Space, and publish a collection whose shared page updates as you add new saves.

OpinionOct 10, 2026

What Endures When Everything Evolves?

From Lode Runner on an Apple II to Unix, X Window and the early internet, Robert Mao traces the experiences behind AFS-UI and a shared interface system for people and agents.

EngineeringOct 10, 2026

Introducing AFS-UI: one interface for people and agents

AFS-UI lets people use a rendered interface while agents reach its corresponding structure through paths. An introduction to AFS, AUP, Web Device and the surrounding UI landscape.