News Grower

Independent coverage of AI, startups, and technology.

Ars Technica Apr 1, 2026 at 20:04 Big Tech

Here's what that Claude Code source leak reveals about Anthropic's plans

A persistent agent, stealth "Undercover" mode, and... a virtual assistant named Buddy?

By Kyle Orland Original source
Here's what that Claude Code source leak reveals about Anthropic's plans

Yesterday's surprise leak of the source code for Anthropic's Claude Code revealed a lot about the vibe-coding scaffolding the company has built around its proprietary Claude model. But observers digging through over 512,000 lines of code across more than 2,000 files have also discovered references to disabled, hidden, or inactive features that provide a peek into the potential roadmap for future features. Chief among these features is Kairos, a persistent daemon that can operate in the background even when the Claude Code terminal window is closed. The system would use periodic "" prompts to regularly review whether new actions are needed and a "PROACTIVE" flag for "surfacing something the user hasn't asked for and needs to see now." Kairos makes use of a file-based "memory system" designed to allow for persistent operation across user sessions. A prompt hidden behind a disabled "KAIROS" flag in the code explains that the system is designed to "have a complete picture of who the user is, how they'd like to collaborate with you, what behaviors to avoid or repeat, and the context behind the work the user gives you."Read full article Comments

Related tags

Companies and people

Story threads

Continue with this story

Follow the same topic through connected articles, entity pages, and active story threads.

Ad slot

Article inline monetization block

A reserved partner slot for relevant tools, services, and contextual editorial integrations.

Partner slot

Related articles

More stories that share tags, source, or category context.

More from Ars Technica

Fresh reporting and follow-up coverage from the same newsroom.

Open source page