Dan Shipper is the CEO and cofounder of Every. Every week he explores the frontiers of AI in his column, Chain of Thought, and on his podcast, ‘AI & I.’
Introducing Proof
Your agent’s favorite way to write documents
Mar 11, 2026 · 4 min readUpdated Jul 6, 2026
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If you use AI seriously to think or work, a surprising share of your documents are probably already written by agents.
Most of us at Every are using Codex to generate plan documents, Claude Cowork to write research reports, and OpenClaws to create strategy memos. But the current process for collaborating and iterating on agent-generated writing is weirdly primitive. It mostly takes place in Markdown files on your laptop, which makes it reminiscent of document editing in 1999.
Because these documents are stuck on your laptop, it’s hard for other agents to help iterate on them—and they’re hard to show to your team, too.
That’s why today we’re officially launching Proof, an online document editor built for agents and humans to collaborate. Fast, free, and no login required. (And it’s open source!)
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