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Atlas

Atlas is source control for coding agents. Every agent run produces checkpoints: commits are linked back to the session that made it alongside the prompts, tool calls, and reasoning. You see which agent did exactly what and why.

Run Claude Code, Codex, Atlas's own agent, or anything from the ACP registry side by side against the same codebase, with shared memory so switching agents mid-task doesn't mean starting over.

• Every commit, explained. A checkpoint links a commit back to the session that produced it: prompts, tool calls, and file changes kept together, queryable months later.
• Run any agent, side by side. Claude Code, Codex, Atlas's own agent, and the wider ACP registry, all in the same window, against the same codebase. Switching agents mid-task doesn't mean starting over.
• One memory, every agent. A decision Claude Code made shows up in Codex's next prompt. Plans, file changes, failures, and architecture notes are shared automatically, matched on-device against what you're asking about.
• Your notes are agent context. Markdown in .atlas/knowledge/, plus the CLAUDE.md and AGENTS.md you already wrote, feed every agent in the project.
• @ anything into a prompt. Files, folders, symbols, branches, commits, notes, papers, and past sessions resolve locally before the prompt is sent.
• Local by default. Code, notes, and sessions stay on your machine. Sign in and create an organisation when you want to sync across a team.

Join the Discord · #general chat · #dev build questions · #feature-requests ideas · #bugs report breakage

Start with CONTRIBUTING.md to send a change, or open an issue for anything you hit.

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Table of contents

• Why Atlas
• How it works
• Checkpoints
• Features
• Download
• Build from source
• Contributing
• Local by default
• Links

Why Atlas

Agents now write a large share of the code and keep none of the reasoning behind it. Atlas records both, and makes them queryable: what changed, by whose agent, at what point in time.

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