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See What Changed in a Revision, and Which Agent Wrote It

Open a revision and switch to Changes to see the diff against the previous update. When an agent wrote it, history names the person and the agent.

Cosmic

September 23, 2026

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See What Changed in a Revision, and Which Agent Wrote It cover image

Tutorials

Give your agent an inbox, then sign it up for Cosmic

An agent can provision its own email address with AgentMail, pass that address to Cosmic agent signu...

Tony Spiro and Mia

September 23, 2026

Community

Claude Opus 5.5 vs Opus 5: What Changed, What It Costs

Anthropic released Claude Opus 5.5 on September 22, 2026. It is 20% cheaper than Opus 5 and scores h...

Tony Spiro and Mia

September 22, 2026

Changelog

Claude Opus 5.5 Is Now Available in Cosmic

Anthropic's new flagship model is live in Cosmic. It costs less than the model it replaces: $4 input...

Cosmic

September 22, 2026

Tutorials

Moving a 1,700-page site to the Next.js 16 App Router without a sitemap hole

We moved cosmicjs.com, all 1,696 URLs, from the Pages Router to the Next.js 16 App Router. The hard...

Tony Spiro

September 21, 2026

Tutorials

Automating Editorial Triage: Routing Drafts Across 13 Properties with Cosmic and TypeSafe

A large editorial team files drafts faster than any editor can read them, whether they come from sta...

Tony Spiro

September 21, 2026

Community

Content governance at scale: roles, approvals, and audit for large editorial teams

With one editor, governance is a conversation. With twenty editors across ten brands, it is a system...

Tony Spiro

September 11, 2026

Changelog

SAML SSO: Sign In Through Your Identity Provider

SAML single sign-on is included on Large Workspace and Enterprise. Enable a connection, send the ACS...

Cosmic

September 10, 2026

Community

Content model drift: why eleven brands end up with eleven different schemas

Nobody decides to run eleven different content models. It happens one launch at a time. Here is how...

Tony Spiro

September 8, 2026

Community

The multi-property content stack: how teams running 5 to 20 sites structure content

A field guide to structuring content across 5 to 20 web properties: what to centralize, what has to...

Tony Spiro

September 8, 2026

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