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ExplainerSep 16, 2026

Bookmarking 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.

NewsSep 13, 2026

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.

OpinionSep 11, 2026

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.

NewsSep 9, 2026

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.

ExplainerAug 21, 2026

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.

ProductAug 20, 2026

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.

OpinionAug 18, 2026

After Software: Collaboration, Production, and How Value Gets Shared

Making software no longer requires making a company first. When productive capacity is scattered across people and AI, collaboration, ownership, and value need a new organization.

NewsAug 14, 2026

ARC Now Supports the MCP 2026-07-28 Specification

ARC already spoke MCP. This upgrade aligns that surface with MCP 2026-07-28: stateless streamable HTTP and standard OAuth discovery so third-party agents can reach Blocklets without a special bridge.

ExplainerAug 14, 2026

Slides that read like an article

A Markdown deck can be published as an article of its own: a player on top, and below it every slide becomes a card with its narration beside it. No separate slide tool, no embedded frames. This article is itself the demo.

OpinionAug 14, 2026

The series, as slides

The whole series in one deck: six claims, one per part, each with a short narration. Play it as a presentation, or read it as a companion summary.

OpinionAug 10, 2026

The Infrastructure Came First. The Residents Are Arriving.

Not a pivot from blockchain to AI. The harder claim is simpler: roads and utilities can be built early, but a digital city only comes alive when residents who can work around the clock walk in.

OpinionAug 10, 2026

Builders Change. Your Property Stays.

Most people will not manage API keys. They will hire agents. The real question is not which model is smarter, but whose ground the worker stands on when the job is done.

EngineeringAug 10, 2026

What `arc skill` Is Today (and What It Is Not)

arc skill ships a small catalog of built-in how-to booklets and can drop them into your agent skill folders. That is useful—and incomplete next to gh skill or AFS’s own .skills trees. Here is the plain map, a short how-to, and the open design gap.

OpinionAug 9, 2026

Agents don't need a better sandbox. They need a computer of their own.

Many companies are building compute for agents: sandboxes, VMs, even digital workers. They answer where untrusted code should run. What agents still lack is a machine that can last: identity, state, constrained authority, verifiable history, and the right to leave. We call that machine ARC.

OpinionAug 9, 2026

Agents don't need a better sandbox. They need a computer of their own.

Many companies are building compute for agents: sandboxes, VMs, even digital workers. They answer where untrusted code should run. What agents still lack is a machine that can last: identity, state, constrained authority, verifiable history, and the right to leave. We call that machine ARC.

ExplainerAug 9, 2026

Review Mode on Web Device: What You See Is What You Review

Open the page readers actually see, mark what is wrong, and leave an executable note next to the content. That is still Web Device in-page review. The overlay is quieter now: a glass island, a composer on the target, optional pointing and freeze.

OpinionAug 8, 2026

Don't Take Your Project to an Agent Factory. Invite Agents Into Your Own Realm.

The important question is not whether an AI model runs locally. It is whether a project remains a place where its people can see, govern, and recover its context, authority, evidence, and change.

EngineeringAug 3, 2026

The Web Content System on ARC: Not Understanding Your Content Is What Makes It Simple

WordPress and Astro both ask a site to declare its content model. That is not a flaw; it is a different trade-off. ARC's Web Device tries to make common web work a runtime, while leaving the meanings of products, terms, and events to object data and application components. This is about where that boundary belongs, and what still has to be supplied to make it hold.

OpinionAug 2, 2026

AI Agents Need More Than a Wallet

Payment is the most visible connection between AI Agents and blockchains, but the more fundamental questions are: who is the Agent, who authorized it, what can it do, and how do we reconcile what happened when something goes wrong?

ExplainerAug 2, 2026

ArcSphere 2.0: ARC's Mobile Application Surface

ArcSphere 2.0 is no longer only an AI browser. It gives the ARC Blocklet experiences that suit a phone a coherent, close-to-native user interface.

OpinionAug 2, 2026

From Blocklet Server to ARC: Why Owning Software Is Harder Than Generating It

AI can turn a request into software, but it does not automatically make that software, its data, or its identity belong to the user. ARC is the new architecture ArcBlock is building for that problem.

OpinionAug 2, 2026

The web as a system capability

The modern web gained real application power, and in the process it tied publishing, interaction and runtime into a single thing. This series proposes a different cut: treat public publishing, identity and basic interaction as capabilities of the computing environment, and let applications grow on top of that.

OpinionAug 2, 2026

How a website became a system you have to operate

Content management systems, databases, browser runtimes and hosting platforms each solved a real problem, and together they made publishing inherit the full operational weight of running an application.

OpinionAug 2, 2026

Files, links, and the thing we stopped noticing: publishing

The early web made publishing direct, and direct was not the same as naive. Understanding that difference is what explains why AFS is not a plan to turn websites back into folders.

ExplainerAug 2, 2026

The web as a system capability: glossary

Separating ARC's own concepts from open web standards and from historical products, so similar names and different layers do not get mixed together.

OpinionAug 2, 2026

Shared semantics are not a walled garden: where ARC meets the open web

Sharing system semantics can make it easier for sites to interact, but that convenience cannot be paid for with a closed network. ARC's boundary is native cooperation and open protocols running in parallel.

OpinionAug 2, 2026

When a URL started calling a program

CGI let a URL trigger computation. It did not end file-based publishing, but it did force the web to deal with resources, actions and state at the same time.

OpinionAug 2, 2026

Why the web lost the ability to answer back

From weblogs through TrackBack to Webmention, independent publishing has kept looking for a way to receive responses. The hard part was never the comment box. It is the identity, verification, moderation and presentation behind it.

ExplainerAug 2, 2026

The web as a system capability: a chronological reference

The web, personal publishing, protocol and ARC design points this series touches. It is a maintainable factual reference, not a substitute for the essays.

OpinionAug 2, 2026

Why the web is a Device in ARC, not just an application

Calling the web a Device is not a fashionable rename. It puts publishing, live interfaces and application-specific logic back inside the system boundaries each of them should carry.

EngineeringJul 31, 2026

Web Device: Declare a Website, Then Pick the Right Path

Web Device is one of ARC's core capabilities: declare a .web/ folder anywhere in AFS, and the data and AUP under it get rendered server-side into a website, SEO checks, broken-link detection, and visitor analytics included for free. This piece covers how it differs from UI Device (/dev/ui/web), how to use it, and which situations call for which.