Google's AX, Audited: 9,045 Stars, a 3-Day-Old Rewrite, and MCP Support That Ends at mkdir

Thu, 24 Sep 2026 00:00:00 +0000

On September 20, 2026, a Hacker News submission titled “AX – Google’s Open Agentic Orchestrator” reached 661 points and 299 comments. It did not link to GitHub. It linked to agentexecutor.io, a marketing site with an animated terminal and the sentence “Scales up to billions of tasks.” The repository behind it, google/ax, now sits at 9,045 stars, 434 forks and 39 open issues, and on September 24 it was the second-fastest-growing repository on GitHub Trending with 1,543 stars gained in a single day — the highest daily velocity of anything on the board that day.

It is worth being precise about what AX is, because the confusion is the point. AX is not an agent framework. It is a declarative control plane that turns “run this agent in a sandbox” into a kubectl-shaped workflow: you write ax.io/v1alpha1 YAML describing a Task, a Workspace, a Gateway and a Model, and AX drops them into a Kubernetes cluster where a stripped-down runtime called Agent Substrate executes them as checkpointable actors.

Agent Substrate on SoloSoft

Google's AX, Audited: 9,045 Stars, a 3-Day-Old Rewrite, and MCP Support That Ends at mkdir